Methods of Petrographic Analyses: |
 ASTM C 295 Petrographic Examination of Aggregates for Concrete |
- Degree of weathering or alteration
- Description and classification
- Potential reactivity (ASR)
- Durability
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| ASTM C 457 Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete |
- Air-void content
- Spacing factor
- Specific surface
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| ASTM C 823 Examination and Sampling of Hardened Concrete in Constructions |
- Procedures for visual examination and sampling of hardened concrete in constructions including prefabricated building units, precast products, and laboratory specimens.
- Sampling can provide materials for petrographic examination and other tests.
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| ASTM C 856 Petrographic Examination of Hardened Concrete |
| (also applies to grout, mortar, brick, stucco, plaster, terrazzo and underlayment) |
- Estimate of water-cement ratio and proportions
- Determine probable future performance
- Freeze-thaw, fire and seismic damage
- Chemical attack and contamination
- Alkali-silica reactivity (ASR)
- Carbonation depth
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| ASTM C 1324 Examination and Analysis of Hardened Masonry Mortar |
- Petrographic examination to describe aggregate, paste, and air voids.
Chemical analysis for soluble silica, calcium oxide, magnesium oxide, insoluble residue, and loss on ignition.
- Microscopic and chemical results combined to determine mortar constituents and proportions.
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| ASTM D 4992 Petrographic Examination of Rock for Erosion Control |
- Rock and mineral identification
- Weak zones including fractures and bedding
- Overall quality and suitability
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DOMINION CONSULTING, INC. 1908 2nd Street La Grande, OR 97850 USA
Phone: (541) 962-7430 Fax: (541) 962-7431 |
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