Category:1007 Aggregate for Base
This article establishes procedures for the inspection, sampling and acceptance of aggregate for base material specified in Sec 1007.
- 1 1007.1 Procedure
- 2 1007.2 Acceptance
- 3 1007.3 Records and Reports
- 4 1007.4 Laboratory Testing for Sec 1007
- 4.1 1007.4.1 Types of Samples Tested
- 4.2 1007.4.2 Procedure
- 4.3 1007.4.3 Sample Record
Inspection, testing and sampling will be governed by the instructions contained in EPG 1001 General Requirements for Material.
Field tests required are as follows:
|Sieve Analysis||T27||Sieve Analysis of Fine and Coarse Aggregate|
|Percent Deleterious||SAA001Fx*||NEWEST Deleterious 1007 Aggregate|
|Compaction||SAA203Ax*||NEWEST Field Soils/Aggregate Compaction|
|Plasticity Index||SAA008Ax*||NEWEST Aggregate Plasticity Index|
|* Test Template numbers have been depicted with a generic ‘x’ as some templates are updated and the last letter in the template name may change. The most current template for a template sequence should contain ‘NEWEST’ at the beginning of the template name.|
Samples required for Laboratory tests are as follows:
- (a) Initial Evaluation required if material has never been tested before.
- (b) Compaction Standard
|Current General Services Specifications (MGS) By Subject|
Acceptance is based on routine tests in the field to ensure compliance with Sec 1007. Samples are to be taken at destination or at the source of aggregate production by MoDOT inspectors at intervals of one per 2,000 tons.
1007.3 Records and Reports
All plant records shown in EPG 1001.6 General Requirements for Material - Records and Reports shall be maintained. A sample record of aggregate inspection shall be created in SiteManager (SM).
1007.4 Laboratory Testing for Sec 1007
1007.4.1 Types of Samples Tested
1007.4.1.1 Initial Approval Sample
Tests consist of specific gravity, absorption and Los Angeles abrasion. The minimum time required for completion of tests is four working days from the date received. Test results and calculations shall be recorded through SM.
1007.4.1.2 Compaction Standard
Tests consist of sieve analysis, maximum density, optimum moisture and plasticity index. The minimum time required for completion of this test is 5 days from the date received. Test results and calculations shall be recorded through SM.
1007.4.2.1 Sieve Analysis
Aggregate shall be tested in accordance with AASHTO T 27.
1007.4.2.2 Specific Gravity and Absorption
Aggregate shall be tested in accordance with AASHTO T 85 for specific gravity.
1007.4.2.3 Los Angeles Abrasion
Aggregate shall be tested in accordance with AASHTO T 96.
1007.4.2.4 Plasticity Index
The plasticity index is the numerical difference between the liquid limit and plastic limit of the material.
The liquid limit shall be determined in accordance with AASHTO T 89 Mechanical Method(Alternate).
The plastic limit shall be determined in accordance with AASHTO T 90.
1007.4.2.5 Compaction Standard
Aggregate shall be tested in accordance with AASHTO T 99, Method "C".
1007.4.2.6 Deleterious Content
The percentage of deleterious substances in coarse aggregate is to be determined according to TM-71, Deleterious Content of Aggregate. Where field determinations show a total deleterious content of 5.0 percent or less for Type 1 and 5 base aggregates, the deleterious content may be inspected visually. Otherwise, the sample is to be tested for deleterious content.
1007.4.3 Sample Record
The sample record shall be completed in SM, as described in Sample Record General Information , and shall indicate acceptance, qualified acceptance, or rejection. Appropriate remarks, as described in EPG 106.20 Reporting, are to be included in the remarks to clarify conditions of acceptance or rejection. Test results shall be reported on the appropriate templates under the Tests tab.