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At first glance, EPA Waters rule keeps concrete plants’ CWA exemptions

Sources: National Ready Mixed Concrete Association, Silver Spring, Md.; Environmental Protection Agency; CP staff

In their early reading of the final “Waters of the U.S.” rule, or Clean Water Rule the EPA and U.S. Army jointly announced late last month, NRMCA Government Affairs staff cite exclusion of certain ready mixed concrete plant aspects, but are reviewing the document for more specifics on industry impact and producer compliance measures.

Read more: At first glance, EPA Waters rule keeps concrete plants’ CWA exemptions

Developer patents flooring adhesive equal to high slab moisture, pH levels

Sources: Formulators, Santa Ana, Calif.; CP staff

As concrete practitioners continue to confront floor-covering work schedules dictated by slabs on grade drying requirements, Formulators has announced patent protection for its waterproof adhesive technology. The patent covers a mixture marketed with the Aquaflex moisture mitigation system for flooring installations on moisture- and pH-bearing concrete.

Read more: Developer patents flooring adhesive equal to high slab moisture, pH levels

Load test results open agency specs for permeable interlocking concrete pavement

Sources: University of California, Davis; Interlocking Concrete Pavement Institute (ICPI), Chantilly, Va.

Civil and pavement engineers can design permeable interlocking concrete pavement (PICP) with confidence for many municipal streets and parking lot applications thanks to findings from one of few studies globally to examine open-graded PICP bases’ structural response to wheel loads.

Read more: Load test results open agency specs for permeable interlocking concrete pavement