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Asphalt Concrete
Asphalt Concrete is inspected during production. Inspectors are well equipped with
sieves, a balance, and other tools to run tests at the plant and make mix design
modifications to assure specification compliance. Asphalt mix designs are approved
at the Lab prior to shipping.
Portland Cement Concrete
Portland Cement Concrete is inspected during production. Inspectors check weighing
of aggregates, cement, water, and admixtures to insure compliance with previously
approvedmix design. Inspectors also obtain samples of aggregate to be transported
to the Materials Lab for testing. Concrete mix designs are approved at the Lab prior
to shipping. Technicians will also perform "slump" tests and fabricate
concrete cylinders for strength tests.
Riffling Asphalt Concrete Sample
Rock Slope Protection
Inspectors are qualified to inspect Rip-Rap at the jobsite as well as at the source.
Aggregate Base
Inspectors are equipped with a set of sieves to perform sieve analysis of aggregate
base on the grade or at the manufacturing plant. Samples are obtained and transported
to the Materials Lab for further testing.
Sampling Aggregate at a Concrete Plant
Prefabricated Concrete Products
- Reinforced Concrete Pipe
Inspectors visually inspect RCP at the manufacturing plant for "Greenbook"
compliance as well as witness D-Load testing of individual pipes.
- Prestressed Concrete Products
Inspectors check forms, observe pre-stressing, inspect concrete and fabricate concrete
cylinders to be transported to the Lab.
Material Stabilization
Cement Treated Base - The purpose of Cement Treated Base is to recycle crushed
pavement and treat with cement and water to produce a firm and unyielding base material
with a high gravel equivalent. Field inspection of Cement Treated Base is achieved
with a crew of 1 or 2 technicians and 1 inspector. The crew performs compaction
tests and "squeeze" tests for quality control of this process.
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