3616.1SCOPE
Provide concrete brick to construct catch basins and manholes.
3616.2REQUIREMENTS
Provide concrete brick meeting the requirements of ASTM C139, Standard Specification for Concrete Masonry Units for Construction of Catch Basins and Manholes , as modified by the following:
individual unit and an average compressive strength of 4,500 psi for 3 units, when delivered to the Project, and
approves the use of a sealing membrane or other curing methods . If steam curing, maintain an atmospheric temperature in the curing chamber no greater than 160 °F. Protect the concrete from freezing until the completion of curing. Continue curing until the concrete develops the compressive strength shown above in item (1) within 28 Calendar Days.
Use any standard size brick capable of producing the dimensions in the completedS tructure as shown on the Plans.
3616.3SAMPLING AND TESTING ............................................................................................ ASTM C140
Precast Concrete Units
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