The use of cement stabilized base and subgrade materials have become more common in the pavement rehabilitation of roadways. Increasing the integrity and strength of the existing pavement structure helps to reduce project costs by reducing removal and replacement of in-place soils.
Unconfined compression tests are conducted on drilled rock cores or concrete cylinders in accordance with ASTM C39. Cylinders are made in the field on fresh concrete and transported to the lab where they are stored in a moist curing room that regulates both humidity and temperature. Typically concrete cylinders are broke at 7 days and 28 days to ensure the design strength of the concrete and compliance with specifications.more