Base Aggregate Testing
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This document summarizes the protocols for testing base aggregate materials used in construction projects. It discusses sampling and splitting procedures, tests for different types of aggregates including natural sand and gravel, crushed limestone, and recycled materials. Common failures in sieve analysis of coarse and fine aggregate fractions are also outlined, such as materials being too coarse or having too few or too many fines. The presentation aims to ensure representative sampling and proper testing of aggregate materials.
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Base Aggregate Testing
- 1. American Engineering Testing, Inc. Base Aggregate Testing December 6, 2016 Presented By: Chris Braaten PG, CPG
- 2. Sampling and Splitting Protocol MnDOT certified personnel Proper sampling -From source -On-site before compaction Proper splitting -Ensure representative sample
- 3. Natural Sand and Gravel -Shale test Crushed Limestone -LAR, insoluble residue Recycled Materials -% Bitumen, % Masonry Block, % Glass, % Brick, % Concrete, etc. Other crushed quarry rock (basalt, granite, quartzite, etc.) Know The Material
- 4. Sieve Analysis Coarse Fraction
- 5. Too coarse and fails percent passing on the 1 sieve -Not crushed properly -Not screened properly Common Coarse Fraction Failures
- 6. Sieve Analysis Fine Fraction
- 7. Common Fine Fraction Failures Not enough fines and fails percent passing the #200 sieve -after spreading and before compaction, heavy rain washes out fines High fines and fails percent passing the #200 sieve -Over crushed -Overburden contamination -Contamination in haul truck -Partially crushed material becomes reduced further during transport or spreading, adding to fines
- 8. THANK YOU! Photo: Portland Cement Association