RMC Foundation concrete strength model picks up where Abrams left off

Source: Ready Mixed Concrete Research & Education Foundation, Alexandria, Va. The latest RMC Research & Education Foundation report, “A Concrete Strength Model to Optimize Concrete Mixtures,” and companion Excel tool equip producers and practitioners to pinpoint appropriate binder dosages and limit potential overdesign as measured in 28-day concrete specimen compressive strengths exceeding psi targets. 

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Durlach Industries strives to save time each “step” to project delivery

Palmetto, Fla.-based Durlach Industries has specialized in precast stairs and landings for 20-plus years, shipping product up and down the East Coast. Leading its current project roster is SunSeeker in Port Charlotte, Fla., a prime example of the producer’s fabrication capabilities and time-saving approach to construction schedules. The resort will feature approximately 500 hotel rooms, 180-plus extended stay suites, 55,000…

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Research contrasts resistivity test vs. w/c ratio to gauge permeability

Sources: Ready Mixed Concrete Research & Education Foundation, Alexandria, Va.; CP staff

A new RMC Research Foundation report based on work at the National Ready Mixed Concrete Association’s College Park, Md. laboratory addresses the lack of a consistent and cost-effective concrete permeability test method. “Reliability of Resistivity Tests of Concrete” authors evaluate mix design and specimen preparation factors that impact resistivity measurement; their conclusions can be incorporated in standards driving agency and engineer specifications in public and private concrete construction. 

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Optimizing Mixtures report advances paste-to-void, rejects minimum CM specs

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

A new report on results of concrete mixtures testing at NRMCA’s College Park, Md., research laboratory underscores optimized cement paste volume and paste-to-void ratio as key factors behind fresh and hardened specimens’ improved performance characteristics.

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