Category:404 Bituminous Mixing Plants - Revision history

Smithk: Inclusive language

2021-06-04T12:55:15Z

Inclusive language

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	intervals as noted above to see if the indicator will “break”.		intervals as noted above to see if the indicator will “break”.

	~~The contractor~~ may elect, at ~~his~~ expense, to have the truck scales calibrated by the Division		Contractors may elect, at their expense, to have the truck scales calibrated by the Division of Weights and Measures of the State Department of Agriculture or by a reputable scale manufacturer or service company. The contractor must provide a complete record of the calibration to the RE, which will be maintained with the project records.
	of Weights and Measures of the State Department of Agriculture or by a reputable scale manufacturer or service company. The contractor must provide a complete record of the calibration to the RE, which will be maintained with the project records.

	Commercial scales must be calibrated annually and approved by the Division of Weights and Measures. Approved scales are marked with a seal giving a number, date tested, and name of testing agency. If calibrated commercial scales are used during the calibration process or during production, calibration will not be required. The location of the scale, the number, and the date tested from the seal of approval must be recorded and maintained with the project records.		Commercial scales must be calibrated annually and approved by the Division of Weights and Measures. Approved scales are marked with a seal giving a number, date tested, and name of testing agency. If calibrated commercial scales are used during the calibration process or during production, calibration will not be required. The location of the scale, the number, and the date tested from the seal of approval must be recorded and maintained with the project records.

Smithk: /* 404.1.4 Requirements for Drum Mix Plants (Sec 404.4) */

2021-06-02T12:17:35Z

404.1.4 Requirements for Drum Mix Plants (Sec 404.4)

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	Each cold feed bin should be calibrated to determine the output in tons per hour throughout the anticipated operating range to ensure the correct amount of each aggregate is being supplied to the mix. It will be the contractor’s responsibility to adjust the individual bin settings so that the combined aggregate flow will conform to the gradation requirements of the Standard Specifications and the JMF.		Each cold feed bin should be calibrated to determine the output in tons per hour throughout the anticipated operating range to ensure the correct amount of each aggregate is being supplied to the mix. It will be the contractor’s responsibility to adjust the individual bin settings so that the combined aggregate flow will conform to the gradation requirements of the Standard Specifications and the JMF.

	Cold feed bins may be calibrated by using the previously calibrated belt scale. Aggregate passing over the belt scale at various bin gate or belt speed settings will provide a ton per hour (TPH) reading for plotting a calibration curve. Set the master feed control on the control panel at a point that the producer anticipates he will run during maximum production. This probably will be in the 50 – 100% range.		Cold feed bins may be calibrated by using the previously calibrated belt scale. Aggregate passing over the belt scale at various bin gate or belt speed settings will provide a ton per hour (TPH) reading for plotting a calibration curve. Set the master feed control on the control panel at a point that the producer anticipates will be run during maximum production. This probably will be in the 50 – 100% range.

	Set an individual bin control feed at three intermediate points such as 30%, 50%, and 70% and check the top point first. Observe the displayed flow rate until it stabilizes and record it in terms of dry tons per hour as a curve point for that setting. The top selected point should provide a flow rate equal to or greater than the maximum rate needed from that particular bin. Plot dry tons per hour vs. bin control settings and approximate the curve for each bin with a straight line. Record the bin gate and master feed control settings on each graph for future reference.		Set an individual bin control feed at three intermediate points such as 30%, 50%, and 70% and check the top point first. Observe the displayed flow rate until it stabilizes and record it in terms of dry tons per hour as a curve point for that setting. The top selected point should provide a flow rate equal to or greater than the maximum rate needed from that particular bin. Plot dry tons per hour vs. bin control settings and approximate the curve for each bin with a straight line. Record the bin gate and master feed control settings on each graph for future reference.

Smithk: /* 404.1.4 Requirements for Drum Mix Plants (Sec 404.4) */ "ensure" correction

2010-07-09T14:00:24Z

404.1.4 Requirements for Drum Mix Plants (Sec 404.4): "ensure" correction

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	The net weight of aggregate recorded on the belt scale totalizer must be within 2% of the		The net weight of aggregate recorded on the belt scale totalizer must be within 2% of the
	net weight in the truck. If not, the contractor shall make proper adjustments and the test shall be repeated until acceptable test results are obtained. Depending on the trouble incurred, more than one acceptable test may be desirable to ~~insure~~ that the scales are properly calibrated.		net weight in the truck. If not, the contractor shall make proper adjustments and the test shall be repeated until acceptable test results are obtained. Depending on the trouble incurred, more than one acceptable test may be desirable to ensure that the scales are properly calibrated.

	Upon completion of the calibration, apply the belt scale weights (if plant is equipped) to the empty belt while running, and record the indicated flow rate for future reference. The weights		Upon completion of the calibration, apply the belt scale weights (if plant is equipped) to the empty belt while running, and record the indicated flow rate for future reference. The weights

Smithk: /* 404.1 Construction Inspection for Sec 404 */ minor clarifications

2010-04-16T17:15:20Z

404.1 Construction Inspection for Sec 404: minor clarifications

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	===404.1.1 Description (Sec 404.1)===		===404.1.1 Description (Sec 404.1)===

	This ~~section~~ contains information on the calibration of the bituminous mixing plants. Detailed information on the operation of the plant and the equipment used to produce bituminous mixes is given in Batch Plants and Drum-mix Plants in [[460.3 Plant Inspection\|Plant Inspection]].		This article contains information on the calibration of the bituminous mixing plants. Detailed information on the operation of the plant and the equipment used to produce bituminous mixes is given in Batch Plants and Drum-mix Plants in [[460.3 Plant Inspection\|Plant Inspection]].

	===404.1.2 Requirements for All Plants (Sec 404.2)===		===404.1.2 Requirements for All Plants (Sec 404.2)===
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	By specification, the contractor is required to perform the plant calibration. However, the		By specification, the contractor is required to perform the plant calibration. However, the
	procedures used in calibration will be outlined in ~~the following sections~~ for informational purposes. The contractor has the option of hiring a certified commercial scale company. The contractor is required to provide the RE with the calibration records proving that the plant has been calibrated and meets the requirements of the Standard Specifications. This includes all measurements, test results, etc.		procedures used in calibration will be outlined in this article for informational purposes. The contractor has the option of hiring a certified commercial scale company. The contractor is required to provide the RE with the calibration records proving that the plant has been calibrated and meets the requirements of the Standard Specifications. This includes all measurements, test results, etc.

	The plant must be calibrated at the beginning of the season before any mix is produced for MoDOT projects, at any time that the plant is moved, and at any time that the accuracy of the proportioning equipment is in question. QA and QC personnel are not required to be present during the calibration process. However, MoDOT reserves the right to witness the calibration.		The plant must be calibrated at the beginning of the season before any mix is produced for MoDOT projects, at any time that the plant is moved, and at any time that the accuracy of the proportioning equipment is in question. QA and QC personnel are not required to be present during the calibration process. However, MoDOT reserves the right to witness the calibration.

EPG-Admin at 20:20, 8 June 2007

2007-06-08T20:20:27Z

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	==404.1 Construction Inspection==		==404.1 Construction Inspection for Sec 404==

	===404.1.1 Description (Sec 404.1)===		===404.1.1 Description (Sec 404.1)===

EPG-Admin at 18:11, 18 December 2006

2006-12-18T18:11:16Z

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	===404.1.5 Stone Matrix Asphalt Mixtures (Sec 404.5)===		===404.1.5 Stone Matrix Asphalt Mixtures (Sec 404.5)===
	See [:Category:403 Asphaltic Concrete Pavement#403.1.2 Material (Sec 403.2)		See [[:Category:403 Asphaltic Concrete Pavement#403.1.2 Material (Sec 403.2)\|Fibers]] in Asphaltic Concrete Pavement.
	\|Fibers]] in Asphaltic Concrete Pavement.

	===404.1.6 Liquid Anti-Strip Additive Systems (Sec 404.6)		===404.1.6 Liquid Anti-Strip Additive Systems (Sec 404.6)===
	See [[460.3 Plant Inspection#460.3.10 Liquid Anti-Strip Additives\|Liquid Anti-Strip Additives]].		See [[460.3 Plant Inspection#460.3.10 Liquid Anti-Strip Additives\|Liquid Anti-Strip Additives]].

	===404.1.7 Hauling Equipment===		===404.1.7 Hauling Equipment===
	See [[460.4 Paving Equipment#460.4.2 Haul Trucks\|Haul Trucks]].		See [[460.4 Paving Equipment#460.4.2 Haul Trucks\|Haul Trucks]].

EPG-Admin at 18:08, 18 December 2006

2006-12-18T18:08:43Z

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	See [[460.3 Plant Inspection#460.3.10 Liquid Anti-Strip Additives\|Liquid Anti-Strip Additives]].		See [[460.3 Plant Inspection#460.3.10 Liquid Anti-Strip Additives\|Liquid Anti-Strip Additives]].

	404.6.1 ~~Calibration.~~		===404.1.7 Hauling Equipment===
	~~404.6.2 Flow Interruption.~~		See [[460.4 Paving Equipment#460.4.2 Haul Trucks\|Haul Trucks]].
	~~404.6.3 Interlock.~~
	~~404.6.4 Type I Addition.~~
	~~404.6.5 Type II Addition.~~
	~~404~~.7 Hauling Equipment.
	See ~~also GCM Section 400~~.5.2 ~~“Haul~~ Trucks~~.” on page 18~~.

EPG-Admin at 17:19, 18 December 2006

2006-12-18T17:19:47Z

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EPG-Admin at 20:11, 16 November 2006

2006-11-16T20:11:06Z

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