Category:403 Asphaltic Concrete Pavement - Revision history

Hoskir: added sample size QRG per RR4205

2026-04-07T18:35:49Z

added sample size QRG per RR4205

← Older revision		Revision as of 13:35, 7 April 2026
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	* [[media:403 Performance Testing Asphalt QRG.pdf\|Performance Testing Sample]]		* [[media:403 Performance Testing Asphalt QRG.pdf\|Performance Testing Sample]]
	* [https://epg.modot.org/forms/general_files/CM/EPG_Guidance_for_Balanced_Mix_Design.docx Balance Mix Design Q&A]		* [https://epg.modot.org/forms/general_files/CM/EPG_Guidance_for_Balanced_Mix_Design.docx Balance Mix Design Q&A]
			* [https://epg.modot.org/forms/CM/Central_Lab_Sample_Sizes.xlsx Central Lab Sample Sizes QRG]
	'''<u><center>AC Price Index Adjustments</center></u>'''		'''<u><center>AC Price Index Adjustments</center></u>'''
	* [https://epg.modot.org/forms/CM/403_Guidance_for_Asphalt_Cement_Price_Index_Adjustments.docx Guidance for Asphalt Cement Price Index Adjustments]		* [https://epg.modot.org/forms/CM/403_Guidance_for_Asphalt_Cement_Price_Index_Adjustments.docx Guidance for Asphalt Cement Price Index Adjustments]

Hoskir: /* 403.1.17 Quality Control (Sec 403.17) */ updated per RR4008

2025-04-11T19:44:23Z

403.1.17 Quality Control (Sec 403.17): updated per RR4008

Hoskir: /* 403.1.5 Mixture Production Specification Limits (Sec 403.5) */ updated per RR4008

2025-04-11T19:42:07Z

403.1.5 Mixture Production Specification Limits (Sec 403.5): updated per RR4008

Hoskir at 13:23, 26 March 2025

2025-03-26T13:23:40Z

← Older revision		Revision as of 08:23, 26 March 2025
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	* [https://epg.modot.org/forms/CM/403_Guidance_for_Asphalt_Cement_Price_Index_Adjustments.docx Guidance for Asphalt Cement Price Index Adjustments]		* [https://epg.modot.org/forms/CM/403_Guidance_for_Asphalt_Cement_Price_Index_Adjustments.docx Guidance for Asphalt Cement Price Index Adjustments]
	'''<u><center>Related Information</center></u>'''		'''<u><center>Related Information</center></u>'''
	* [https://epg.modot.org/forms/cm/104_7_Maintenance.docx Guidance for Administering and Planning Pavement Maintenance Responsibilities during Construction]		* [https://epg.modot.org/forms/CM/104_7_Maintenance.docx Guidance for Administering and Planning Pavement Maintenance Responsibilities during Construction]
	</div>		</div>

Hoskir: updated link

2025-03-26T13:22:27Z

updated link

← Older revision		Revision as of 08:22, 26 March 2025
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	* [https://epg.modot.org/forms/CM/403_Guidance_for_Asphalt_Cement_Price_Index_Adjustments.docx Guidance for Asphalt Cement Price Index Adjustments]		* [https://epg.modot.org/forms/CM/403_Guidance_for_Asphalt_Cement_Price_Index_Adjustments.docx Guidance for Asphalt Cement Price Index Adjustments]
	'''<u><center>Related Information</center></u>'''		'''<u><center>Related Information</center></u>'''
	* [https://epg.modot.org/forms/cm~~/FormServerTemplates~~/104_7_Maintenance.docx Guidance for Administering and Planning Pavement Maintenance Responsibilities during Construction]		* [https://epg.modot.org/forms/cm/104_7_Maintenance.docx Guidance for Administering and Planning Pavement Maintenance Responsibilities during Construction]
	</div>		</div>

Hoskir: updated link

2025-03-26T13:21:57Z

updated link

← Older revision		Revision as of 08:21, 26 March 2025
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	* [https://epg.modot.org/forms/CM/403_Guidance_for_Asphalt_Cement_Price_Index_Adjustments.docx Guidance for Asphalt Cement Price Index Adjustments]		* [https://epg.modot.org/forms/CM/403_Guidance_for_Asphalt_Cement_Price_Index_Adjustments.docx Guidance for Asphalt Cement Price Index Adjustments]
	'''<u><center>Related Information</center></u>'''		'''<u><center>Related Information</center></u>'''
	* [https://~~modotgov~~.~~sharepoint~~.~~com~~/~~sites~~/cm/FormServerTemplates/104_7_Maintenance.docx Guidance for Administering and Planning Pavement Maintenance Responsibilities during Construction]		* [https://epg.modot.org/forms/cm/FormServerTemplates/104_7_Maintenance.docx Guidance for Administering and Planning Pavement Maintenance Responsibilities during Construction]
	</div>		</div>

Hoskir: updated link to 2009 asphalt report

2025-03-06T18:18:25Z

updated link to 2009 asphalt report

← Older revision		Revision as of 13:18, 6 March 2025
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	<div style="float: right; margin-top: 5px; margin-left: 15px; width:210px; font-size: 95%; background-color: #d4e4f3; padding: 0.3em; border: 1px solid #a2a9b1; text-align:left;">		<div style="float: right; margin-top: 5px; margin-left: 15px; width:210px; font-size: 95%; background-color: #d4e4f3; padding: 0.3em; border: 1px solid #a2a9b1; text-align:left;">
	'''<u><center>Asphalt, Permeability</center></u>'''		'''<u><center>Asphalt, Permeability</center></u>'''
	* [https://~~spexternal~~.~~modot~~.~~mo.gov~~/~~sites~~/cm/~~CORDT~~/or10010.pdf Report 2009]		* [https://mospace.umsystem.edu/xmlui/bitstream/handle/10355/100613/or10010.pdf?sequence=1&isAllowed=y Report 2009]
	'''See also:''' [https://www.modot.org/research-publications Research Publications]		'''See also:''' [https://www.modot.org/research-publications Research Publications]
	</div>		</div>

Hoskir: added link for BMD QA per RR 4021

2025-03-06T16:25:16Z

added link for BMD QA per RR 4021

← Older revision		Revision as of 11:25, 6 March 2025
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	{\|style="~~padding~~: ~~0.3em~~; margin-~~left~~:~~7px~~; ~~border:1px solid #a9a9a9; text~~-~~align~~:~~center~~; ~~font~~-~~size~~: ~~95%~~; ~~background:#ffddcc" width="180px" align="right~~"		<div style="float: right; margin-top: 5px; margin-left: 15px; margin-bottom: 15px;">__TOC__</div>
	\|-
	~~\|'''Asphalt, Permeability'''~~
	\|-
	~~\|[https://spexternal.modot.mo.gov/sites/cm~~/~~CORDT/or10010.pdf Report 2009]~~
	\|-
	~~\|'''See also:''' [https://www.modot.org/research-publications Research Publications]~~
	\|}

	{\|style="~~padding~~: ~~0.3em~~; margin-left:15px; ~~border~~:~~1px solid #a9a9a9; text-align:center~~; font-size: 95%; background:#~~f5f5f5" width="300px"~~ align~~="right~~"		<div style="float: right; margin-top: 5px; margin-left: 15px; width:320px; font-size: 95%; background-color: #f8f9fa; padding: 0.3em; border: 1px solid #a2a9b1; text-align:left;">
	\|-		'''<u><center>Forms</center></u>'''
	\|'''Forms'''		* [[Media:403 Form QAQC Project Checklist.doc\| QA/QC Checklist]]
	\|-		* [[Media:403 Form Profilograph Report.doc\| Profiloqraph Report]]
	\|[[Media:403 Form QAQC Project Checklist.doc\| QA/QC Checklist]]		'''<u><center>QRGs</center></u>'''
	\|-		* [[:Category:101 Standard Forms#SuperPave Adjustments\|SuperPave Adjustments]]
	\|[[Media:403 Form Profilograph Report.doc\| Profiloqraph Report]]		* [[media:403 Performance Testing Asphalt QRG.pdf\|Performance Testing Sample]]
	\|-		* [https://epg.modot.org/forms/general_files/CM/EPG_Guidance_for_Balanced_Mix_Design.docx Balance Mix Design Q&A]
	\|'''QRGs'''		'''<u><center>AC Price Index Adjustments</center></u>'''
	\|-		* [https://epg.modot.org/forms/CM/403_Guidance_for_Asphalt_Cement_Price_Index_Adjustments.docx Guidance for Asphalt Cement Price Index Adjustments]
	\|[[:Category:101 Standard Forms#SuperPave Adjustments\|SuperPave Adjustments]]		'''<u><center>Related Information</center></u>'''
	\|-		* [https://modotgov.sharepoint.com/sites/cm/FormServerTemplates/104_7_Maintenance.docx Guidance for Administering and Planning Pavement Maintenance Responsibilities during Construction]
	\|[[media:403 Performance Testing Asphalt QRG.pdf\|Performance Testing Sample]]		</div>
	\|-
	\|'''AC Price Index Adjustments'''		<div style="float: right; margin-top: 5px; margin-left: 15px; width:210px; font-size: 95%; background-color: #d4e4f3; padding: 0.3em; border: 1px solid #a2a9b1; text-align:left;">
	\|-		'''<u><center>Asphalt, Permeability</center></u>'''
	\|[https://epg.modot.org/forms/CM/403_Guidance_for_Asphalt_Cement_Price_Index_Adjustments.docx Guidance for Asphalt Cement Price Index Adjustments]		* [https://spexternal.modot.mo.gov/sites/cm/CORDT/or10010.pdf Report 2009]
	\|-		'''See also:''' [https://www.modot.org/research-publications Research Publications]
	\|'''Related Information'''		</div>
	\|-
	\|[https://modotgov.sharepoint.com/sites/cm/FormServerTemplates/104_7_Maintenance.docx Guidance for Administering and Planning Pavement Maintenance Responsibilities during Construction]
	\|}

	==403.1 Construction Inspection for Sec 403==		==403.1 Construction Inspection for Sec 403==

	===403.1.1 Description (Sec 403.1)===		===403.1.1 Description (Sec 403.1)===
	There will be no commentary for sections in which the intent of the		There will be no commentary for sections in which the intent of the

Hoskir: /* 403.1.17 Quality Control (Sec 403.17) */

2024-12-13T18:19:03Z

403.1.17 Quality Control (Sec 403.17)

← Older revision		Revision as of 13:19, 13 December 2024
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	Up to 3 cores are allowed at each random location, but only if spelled out in the QC plan. In the drawing below, the cylinder represents the station and offset of the random location. Best management practice is for QA to mark that location on the pavement. The first density core should have that marking on it. Any additional cores should be taken along a straight line, parallel to the centerline, within 1 foot either side of the random location.		Up to 3 cores are allowed at each random location, but only if spelled out in the QC plan. In the drawing below, the cylinder represents the station and offset of the random location. Best management practice is for QA to mark that location on the pavement. The first density core should have that marking on it. Any additional cores should be taken along a straight line, parallel to the centerline, within 1 foot either side of the random location.

	[[image:403_2foot.~~PNG~~\|350px\|center\|thumb\|<center>]]		[[image:403_2foot.png\|350px\|center\|thumb\|<center>]]

	'''Plant Calibration''' (Sec 403.17.2.2)		'''Plant Calibration''' (Sec 403.17.2.2)

Hoskir: /* 403.1.5 Mixture Production Specification Limits (Sec 403.5) */ updated per RR3956 Clarifiying TSR information for sample records

2024-11-21T16:17:04Z

403.1.5 Mixture Production Specification Limits (Sec 403.5): updated per RR3956 Clarifiying TSR information for sample records

← Older revision		Revision as of 11:17, 21 November 2024
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	QC should obtain enough mix to retain a sample. QC will sample and test each mix at a minimum of once every 10,000 tons, or fraction thereof. QA will independently sample and test each mix at a minimum of once every 50,000 tons. The TSR sampling requirements are best described with an example. Suppose that 112,960 tons of SP190 are to be placed on a project. By specification, QC is required to take twelve samples and QA is required to take three samples. There are two possible scenarios for sampling this mix. QC may take eleven samples representing 10,000 tons each and a twelfth sample that represents the remaining 2,960 tons. Or QC may take ten samples that represent 10,000 tons each and two samples that represent the remaining 12,960 tons (6,480 tons each). Either scenario is acceptable. Likewise, QA may take two samples representing 50,000 tons each and a third sample that represents the remaining 12,960 tons. Or QA may take one sample that represents 50,000 tons and two samples that represent the remaining 62,960 tons (31,480 tons each). The contract quantity may be used to approximate sample 1 locations.		QC should obtain enough mix to retain a sample. QC will sample and test each mix at a minimum of once every 10,000 tons, or fraction thereof. QA will independently sample and test each mix at a minimum of once every 50,000 tons. The TSR sampling requirements are best described with an example. Suppose that 112,960 tons of SP190 are to be placed on a project. By specification, QC is required to take twelve samples and QA is required to take three samples. There are two possible scenarios for sampling this mix. QC may take eleven samples representing 10,000 tons each and a twelfth sample that represents the remaining 2,960 tons. Or QC may take ten samples that represent 10,000 tons each and two samples that represent the remaining 12,960 tons (6,480 tons each). Either scenario is acceptable. Likewise, QA may take two samples representing 50,000 tons each and a third sample that represents the remaining 12,960 tons. Or QA may take one sample that represents 50,000 tons and two samples that represent the remaining 62,960 tons (31,480 tons each). The contract quantity may be used to approximate sample 1 locations.

	MoDOT should collect at least 250 pounds of asphalt mix for the QA sample, 125 pounds is retained by the RE and the other 125 pounds is sent to the Central Laboratory (typically) in 4 – 13” x 13” x 4.5” boxes for QA testing. Each box must be labeled on one side with the AASHTOWARE Project (AWP) ID, Mix Type, VMA Limits (percent) number and the mix number. An AWP record must be created for each sample, which must include all required information, the mix number, ~~lot, sublot~~, and the represented tonnage. The represented tonnage is explained in the example in the preceding paragraph.		MoDOT should collect at least 250 pounds of asphalt mix for the QA sample, 125 pounds is retained by the RE and the other 125 pounds is sent to the Central Laboratory (typically) in 4 – 13” x 13” x 4.5” boxes for QA testing. Each box must be labeled on one side with the AASHTOWARE Project (AWP) ID, Mix Type, VMA Limits (percent) number and the mix number. An AWP record must be created for each sample, which must include all required information, the mix number, sample date, and the represented tonnage. The represented tonnage is explained in the example in the preceding paragraph. It is recommended to include the lot and sublot to the AWP record as additional information.

	Additional information that may be included in the AWP record is the G<sub>mm</sub> from the sublot that the sample was taken in (QC or QA) and the specimen weight that QC has been using. The specimen weight may be different from that shown on the JMF because of bin percent changes, etc. This information is helpful because it results in less trial-and-error for the Central Laboratory.		Additional information that may be included in the AWP record is the G<sub>mm</sub> from the sublot that the sample was taken in (QC or QA) and the specimen weight that QC has been using. The specimen weight may be different from that shown on the JMF because of bin percent changes, etc. This information is helpful because it results in less trial-and-error for the Central Laboratory.

← Older revision		Revision as of 14:44, 11 April 2025
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	===403.1.17 Quality Control (Sec 403.17)===		===403.1.17 Quality Control (Sec 403.17)===

	Under QC/QA, the contractor performs quality control (QC) testing. The contractor is paid based on the results of the randomly located QC tests for Superpave mixes. Beyond random QC tests, quality control by the contractor consists of constantly monitoring materials integrity, mix production and laydown operations to ensure overall acceptability.		Under QC/QA, the contractor performs quality control (QC) testing. The contractor is paid based on the results of the randomly located QC tests for Superpave mixes. Beyond random QC tests, quality control by the contractor consists of constantly monitoring materials integrity, mix production and laydown operations to ensure overall acceptability.

	<div id="Asphalt Test Results (Sec 403.17.1.1)">		<div id="Asphalt Test Results (Sec 403.17.1.1)">
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	An informational test is a test that QC may perform between random testing to determine whether or not the mix is within specifications. Informational testing is not required and may be performed at any time and at any frequency. Generally, informational testing will be performed early in the production period. The informational test may not be completed in full. For example, QC may only compact the gyratory specimens. Doing so will yield specimen heights and the contractor may or may not make production adjustments based on these heights. Informational test samples must be clearly marked as such if they are tested and stored in the field laboratory.		An informational test is a test that QC may perform between random testing to determine whether or not the mix is within specifications. Informational testing is not required and may be performed at any time and at any frequency. Generally, informational testing will be performed early in the production period. The informational test may not be completed in full. For example, QC may only compact the gyratory specimens. Doing so will yield specimen heights and the contractor may or may not make production adjustments based on these heights. Informational test samples must be clearly marked as such if they are tested and stored in the field laboratory.

	QC is not required to provide the QA inspector with informational test results, since informational tests cannot be used in the QC process to determine pay factors, The timing of random number locations being given to the contractor, typically 100 to 150 tons in advance, is meant to protect the integrity of the statistical sampling process. QA always has the option of taking its own informational samples.		QC is not required to provide the QA inspector with informational test results, since informational tests cannot be used in the QC process to determine pay factors, The timing of random number locations being given to the contractor, typically 100 to 150 tons in advance, is meant to protect the integrity of the statistical sampling process. QA always has the option of taking its own informational samples.

	Informational test data may be used to determine asphalt removal limits if it is adequately documented. It should not be used for QLA under any circumstances. To be considered adequately documented the following criteria should be met:		Informational test data may be used to determine asphalt removal limits if it is adequately documented. It should not be used for QLA under any circumstances. To be considered adequately documented the following criteria should be met:
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	'''Removal Limits'''		'''Removal Limits'''

	As an example of how informational tests may be used to designate removal limits of failing QC samples, the following situation is provided. The random QC sample shown in the diagram below fell late in sublot ‘a’ and test results indicated that voids were below the limits for removal. By specification sublot ‘a’ should be removed. By the time the test results were available and corrective action was taken, the contractor had crossed into sublot ‘b’. Assuming that mix properties were acceptable at the beginning of sublot ‘a’, the actual limits of unacceptable material are indicated by the dashed lines.		As an example of how informational tests may be used to designate removal limits of failing QC samples, the following situation is provided. The random QC sample shown in the diagram below fell late in sublot ‘a’ and test results indicated that voids were below the limits for removal. By specification sublot ‘a’ should be removed. By the time the test results were available and corrective action was taken, the contractor had crossed into sublot ‘b’. Assuming that mix properties were acceptable at the beginning of sublot ‘a’, the actual limits of unacceptable material are indicated by the dashed lines.

	Adhering strictly to the specification, it is likely that acceptable material early in sublot ‘a’ will be removed, and it is also likely that unacceptable material early in sublot ‘b’ will be left in place. An adequately documented informational test may be used to zero in on the transitions out of, and back into, acceptable mix. It doesn’t matter that the data is approximate, only that it is above the limit for removal.		Adhering strictly to the specification, it is likely that acceptable material early in sublot ‘a’ will be removed, and it is also likely that unacceptable material early in sublot ‘b’ will be left in place. An adequately documented informational test may be used to zero in on the transitions out of, and back into, acceptable mix. It doesn’t matter that the data is approximate, only that it is above the limit for removal.

	Random tests within removal limits are to be replaced by an equal number of random QC test locations, regardless of tonnage. For example, if 750 tons replace an area covered by two random tests, the new tests would be randomly chosen in each 375 ton portion of the replaced mixture.		Random tests within removal limits are to be replaced by an equal number of random QC test locations, regardless of tonnage. For example, if 750 tons replace an area covered by two random tests, the new tests would be randomly chosen in each 375 ton portion of the replaced mixture.
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	[[image:403_removal_limits.png\|950px\|center\|thumb\|<center>]]		[[image:403_removal_limits.png\|950px\|center\|thumb\|<center>]]

	When the random QC density core is below or above the removal limits, additional cores may be cut using the following procedure to determine the area of removal. Locations 250’ parallel to the centerline, ahead and back of the failing QC location, will be determined by the engineer. Cores will be cut in these locations and tested. If both sets of cores are not below or above the removal limits, the 500’ section will be removed and replaced with acceptable material and a new random QC core will be cut with-in the new pavement. If either set of the cores are below or above the removal limits, the whole sublot or the area in which the density core represents is subject to removal.		When the random QC density core is below or above the removal limits, additional cores may be cut using the following procedure to determine the area of removal. Locations 250’ parallel to the centerline, ahead and back of the failing QC location, will be determined by the engineer. Cores will be cut in these locations and tested. If both sets of cores are not below or above the removal limits, the 500’ section will be removed and replaced with acceptable material and a new random QC core will be cut with-in the new pavement. If either set of the cores are below or above the removal limits, the whole sublot or the area in which the density core represents is subject to removal.

	Any sublot of material with air voids in the compacted specimens less than 2.5 percent shall be evaluated with Hamburg testing and removed and replaced with acceptable material by the contractor if the rut depth is greater than 14.0 mm.		Any sublot of material with air voids in the compacted specimens less than 2.5 percent shall be evaluated with Hamburg testing and removed and replaced with acceptable material by the contractor if the rut depth is greater than 14.0 mm.
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	'''Bituminous Quality Control Plan''' (Sec 403.17.2)		'''Bituminous Quality Control Plan''' (Sec 403.17.2)

	The contractor documents the QC method with a quality control plan (QC Plan*). The QC plan for Superpave mixes shall include the contact information of the contractor’s QC representative, lot and sublot sizes and how they will be designated, the test method for determining asphalt binder content, the number of cores to be cut for density determination, and the independent third party for dispute resolution. The QC plan is approved by MoDOT Construction and Materials and used as a contract document during mix production. Contractor technicians who perform materials testing shall be certified through the MoDOT Technician Certification Program (TCP).		The contractor documents the QC method with a quality control plan (QC Plan*). The QC plan for Superpave mixes shall include the contact information of the contractor’s QC representative, lot and sublot sizes and how they will be designated, the test method for determining asphalt binder content, the number of cores to be cut for density determination, and the independent third party for dispute resolution. The QC plan is approved by MoDOT Construction and Materials and used as a contract document during mix production. Contractor technicians who perform materials testing shall be certified through the MoDOT Technician Certification Program (TCP).

	Note: A QC Plan is not required for bituminous base (BB) and pavement (BP) mixes.		Note: A QC Plan is not required for bituminous base (BB) and pavement (BP) mixes.

	Up to 3 cores are allowed at each random location, but only if spelled out in the QC plan. In the drawing below, the cylinder represents the station and offset of the random location. Best management practice is for QA to mark that location on the pavement. The first density core should have that marking on it. Any additional cores should be taken along a straight line, parallel to the centerline, within 1 foot either side of the random location.		Up to 3 cores are allowed at each random location, but only if spelled out in the QC plan. In the drawing below, the cylinder represents the station and offset of the random location. Best management practice is for QA to mark that location on the pavement. The first density core should have that marking on it. Any additional cores should be taken along a straight line, parallel to the centerline, within 1 foot either side of the random location.

	[[image:403_2foot.png\|350px\|center\|thumb\|<center>]]		[[image:403_2foot.png\|350px\|center\|thumb\|<center>]]
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	'''Retained Samples''' (Sec 403.17.2.3)		'''Retained Samples''' (Sec 403.17.2.3)

	QC must retain the portion of each sample that is not tested after the sample has been reduced to testing size. This includes gradation, consensus, TSR, and volumetrics samples. The retained samples must be clearly identified in accordance with Standard Specification Section 403.17.2.3 and stored in the field laboratory for a minimum of 7 days. Also, all cores must be retained for a minimum of 7 days. Notwithstanding the 7 day minimum, retained samples should not be discarded until all comparison issues with the lot are resolved. If space at the field lab is an issue, the sample should be stored at the project office.		QC must retain the portion of each sample that is not tested after the sample has been reduced to testing size. This includes gradation, consensus, TSR, and volumetrics samples. The retained samples must be clearly identified in accordance with Standard Specification Section 403.17.2.3 and stored in the field laboratory for a minimum of 7 days. Also, all cores must be retained for a minimum of 7 days. Notwithstanding the 7 day minimum, retained samples should not be discarded until all comparison issues with the lot are resolved. If space at the field lab is an issue, the sample should be stored at the project office.

	There is no legitimate reason for unidentified samples to be in the field laboratory. The QA inspector should insist that all test specimens in the field laboratory be marked as soon as they are cool enough. The identifying mark should be permanent, unique, and indicate what the sample is.		There is no legitimate reason for unidentified samples to be in the field laboratory. The QA inspector should insist that all test specimens in the field laboratory be marked as soon as they are cool enough. The identifying mark should be permanent, unique, and indicate what the sample is.
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	'''Gradation Sample''' (Sec 403.17.2.3.1)		'''Gradation Sample''' (Sec 403.17.2.3.1)

	QC will retain the portion of their gradation sample that is not tested. This includes the sample of the combined cold feed from a drum plant and all hot bin samples from a batch plant.		QC will retain the portion of their gradation sample that is not tested. This includes the sample of the combined cold feed from a drum plant and all hot bin samples from a batch plant. Aggregate samples should be taken in accordance with AASHTO R 90.

	'''Loose Mix Sample''' (Sec 403.17.2.3.2)		'''Loose Mix Sample''' (Sec 403.17.2.3.2)
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	'''Quality Control Laboratory''' (Sec 403.17.3)		'''Quality Control Laboratory''' (Sec 403.17.3)

	The contractor is required to provide an appropriately equipped QC laboratory, however, it is not required to be at the plant. The contractor is also required to provide office space at the asphalt plant for the QA inspector to work on records and reports. Usually, these two requirements are met with one structure, but not always. The intent of the specification will be met if the QA inspector is provided with suitable facilities at the plant, but the lab is located offsite at another location, such as between the jobsite and the plant. The laboratory should have internet access in the event that cell phone service is not available.		The contractor is required to provide an appropriately equipped QC laboratory, however, it is not required to be at the plant. The contractor is also required to provide office space at the asphalt plant for the QA inspector to work on records and reports. Usually, these two requirements are met with one structure, but not always. The intent of the specification will be met if the QA inspector is provided with suitable facilities at the plant, but the lab is located offsite at another location, such as between the jobsite and the plant. The laboratory should have internet access in the event that cell phone service is not available.

	'''Calibration Schedule''' (Sec 403.17.3.1)		'''Calibration Schedule''' (Sec 403.17.3.1)

← Older revision		Revision as of 14:42, 11 April 2025
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	===403.1.5 Mixture Production Specification Limits (Sec 403.5)===		===403.1.5 Mixture Production Specification Limits (Sec 403.5)===

	Intentional deviations from the JMF will not be permitted, except under the conditions set forth in Sec 403.11. The plant shall be operated in such a manner that the mix is produced as shown on the JMF. The specification tolerances are developed in an attempt to keep the mix as consistent as possible and to allow for some variation during production. However, these tolerances are not production limits. For example, if the target binder content is 5.0%, the binder content of the mix can range from 4.7% to 5.3% when the tolerances are applied. The contractor will not be allowed to produce the mix at 4.7% to save money.		Intentional deviations from the JMF will not be permitted, except under the conditions set forth in Sec 403.11. The plant shall be operated in such a manner that the mix is produced as shown on the JMF. The specification tolerances are developed in an attempt to keep the mix as consistent as possible and to allow for some variation during production. However, these tolerances are not production limits. For example, if the target binder content is 5.0%, the binder content of the mix can range from 4.7% to 5.3% when the tolerances are applied. The contractor will not be allowed to produce the mix at 4.7% to save money.

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	Both QC and QA will use the following procedures to determine volumetrics of the mix and compliance with Standard Specification Sections 403.5.3 through 403.5.5. These procedures are discussed in greater detail in the Levels 1 and 2 Bituminous Training.		Both QC and QA will use the following procedures to determine volumetrics of the mix and compliance with Standard Specification Sections 403.5.3 through 403.5.5. These procedures are discussed in greater detail in the Levels 1 and 2 Bituminous Training.

	In situations where a retained sample must be tested, the following procedure should be used to reheat the sample. Heat the sample in an oven until the mix is workable. Take the mix out of the sample container (box, bucket, etc.) and spread it in a large pan or several smaller pans. Using this procedure, the mix will reach the molding temperature much quicker than it would if it were left in a mass in the sample container. Also, less aging of the mix occurs since the mix is in the oven for a shorter period of time. Once the mix has reached an acceptable temperature, quarter split the mix. The split portions to be used for making gyratory specimens shall then be heated to the compaction temperature. The entire suite of tests must be performed on a retained sample.		In situations where a retained sample must be tested, the following procedure should be used to reheat the sample. Heat the sample in an oven until the mix is workable. Take the mix out of the sample container (box, bucket, etc.) and spread it in a large pan or several smaller pans. Using this procedure, the mix will reach the molding temperature much quicker than it would if it were left in a mass in the sample container. Also, less aging of the mix occurs since the mix is in the oven for a shorter period of time. Once the mix has reached an acceptable temperature, quarter split the mix. The split portions to be used for making gyratory specimens shall then be heated to the compaction temperature. The entire suite of tests must be performed on a retained sample.

	'''Gradation''' (Sec 403.5.1)		'''Gradation''' (Sec 403.5.1)
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	During production, the combined aggregate gradation must be within the following limits:		During production, the combined aggregate gradation must be within the following limits:

	{\| ~~border="1"~~ class="wikitable" style="margin: 1em auto 1em auto"		{\| class="wikitable" style="margin: 1em auto 1em auto"
	\|-		\|-
	! Colspan="4" style="background:#BEBEBE"\|Percent Passing by Weight		! Colspan="4" style="background:#BEBEBE" \| Percent Passing by Weight
	\|-		\|-
	!style="background:#BEBEBE"\|Sieve Size\|\|style="background:#BEBEBE"\|SP250\|\|style="background:#BEBEBE"\|SP190\|\|style="background:#BEBEBE"\|SP125		!style="background:#BEBEBE"\|Sieve Size\|\|style="background:#BEBEBE"\|SP250\|\|style="background:#BEBEBE"\|SP190\|\|style="background:#BEBEBE"\|SP125
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	<div id="A favorable comparison will be obtained"></div>		<div id="A favorable comparison will be obtained"></div>

	A favorable comparison will be obtained if the QC and QA test results are within 10% of each other. The contractor’s pay will be adjusted in accordance with Standard Specification Section 403.23.5 based on the QC test results. For example, if the QC TSR is 95% and the QA TSR is 93%, a favorable comparison has been obtained and the contractor will receive a 3% bonus. However, if the difference is greater than 10%, the field office should be consulted. The field office will evaluate the air voids and saturation levels. The raw data should be collected from QC and forwarded to the field office for comparison in order to determine whether it will be necessary to proceed with 3<sup>rd</sup> party testing. QC and QA retained samples should be kept for an extended period of time so that they may be used during dispute resolution, if necessary.		A favorable comparison will be obtained if the QC and QA test results are within 10% of each other. The contractor’s pay will be adjusted in accordance with Standard Specification Section 403.23.5 based on the QC test results. For example, if the QC TSR is 95% and the QA TSR is 93%, a favorable comparison has been obtained and the contractor will receive a 3% bonus. However, if the difference is greater than 10%, the field office should be consulted. The field office will evaluate the air voids and saturation levels. The raw data should be collected from QC and forwarded to the field office for comparison in order to determine whether it will be necessary to proceed with 3<sup>rd</sup> party testing. QC and QA retained samples should be kept for an extended period of time so that they may be used during dispute resolution, if necessary.

	The QC data should be reported in AWP (Test - SAA402AB). Contractors may report their own test results using the TSR Contractor Reporting Excel to Oracle Spreadsheet available on the MoDOT [http://www.modot.org/business/contractor_resources/Quality_Management/ Quality Management] website. Furthermore, this information is quarried regularly and, provided that a favorable comparison is reached, used to signal the appropriate time for disposal of the remaining TSR sample at the Central Lab.		The QC data should be reported in AWP (Test - SAA402AB). Contractors may report their own test results using the TSR Contractor Reporting Excel to Oracle Spreadsheet available on the MoDOT [http://www.modot.org/business/contractor_resources/Quality_Management/ Quality Management] website. Furthermore, this information is quarried regularly and, provided that a favorable comparison is reached, used to signal the appropriate time for disposal of the remaining TSR sample at the Central Lab.

	<div id="Aggregate Properties"></div>		<div id="Aggregate Properties"></div>
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	'''Aggregate Properties''' (Sec 403.5.7)		'''Aggregate Properties''' (Sec 403.5.7)

	The aggregate consensus tests (Fine and Coarse Aggregate Angularity, Clay Content, and Thin, Elongated Particles) are performed on the blended aggregate. The aggregate will be sampled from the combined cold feed whether dealing with a drum-mix plant or a batch plant.		The aggregate consensus tests (Fine and Coarse Aggregate Angularity, Clay Content, and Thin, Elongated Particles) are performed on the blended aggregate. The aggregate will be sampled from the combined cold feed whether dealing with a drum-mix plant or a batch plant. Aggregate samples should be taken in accordance with AASHTO R 90.

	For each mix that is produced, QC shall sample the aggregate and perform the consensus tests once every 10,000 tons with a minimum of one per mix per project. QA will independently sample the aggregate and perform the consensus tests once per project. QA should also test a minimum of one QC retained sample per project. For large projects, enough QC retained samples should be tested to ensure that QC is performing the tests correctly. These testing requirements are minimums and should be increased as necessary. During production, the following tolerances are applied (see Standard Specification Sections 403.2.1 through 403.2.5 and [[media:403 Figure Consensus Testing.pdf\|Consensus Testing]]).		For each mix that is produced, QC shall sample the aggregate and perform the consensus tests once every 10,000 tons with a minimum of one per mix per project. QA will independently sample the aggregate and perform the consensus tests once per project. QA should also test a minimum of one QC retained sample per project. For large projects, enough QC retained samples should be tested to ensure that QC is performing the tests correctly. These testing requirements are minimums and should be increased as necessary. During production, the following tolerances are applied (see Standard Specification Sections 403.2.1 through 403.2.5 and [[media:403 Figure Consensus Testing.pdf\|Consensus Testing]]).