Petrographic Examination
Petrographic examination is useful for identifying aggregates that are susceptible to alkali-aggregate reactions, lack freeze-thaw durability, are soft or incompetent, have deleterious coatings or excessive fines, and more. DRP has extensive experience with aggregate QA/QC for use in concrete or other cement-based materials following procedures described in ASTM C295, Guide for Petrographic Examination of Aggregates for Concrete. We have done petrographic examination on aggregates from all over North America, Central and South America, Asia, and scattered Pacific Islands.
U.S. Army Corps of Engineers Certification
DRP is a USACE certified laboratory. This validation indicates that our personnel, equipment, and internal quality control measures meet the standards set by the USACE for quality control and quality assurance. Our certifications include the following:
- Aggregate – C 295 – Opt – Petrographic Examination of Aggregates for Concrete
- Concrete – C 457 – Opt – Air-Void System by Microscopic Determination
- Concrete – C 856 – Opt – Petrographic Examination of Hardened Concrete