Sources: MIT Concrete Sustainability Hub, Cambridge, Mass.; CP staff The newest Research Brief from the Massachusetts Institute of Technology-hosted Concrete Sustainability Hub illustrates how concrete practitioners can realize voluminous recycling and pozzolanic value extraction from municipal waste streams. “Open-loop Recycling of Glass in Concrete Provides Upcycling Opportunities” authors also posit a new metric for architectural/engineering/construction professionals: Mid- to high-rise buildings…
Read MoreTag: concrete mixtures
RMC Foundation strength predictor model picks up where Duff Abrams left off
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. Report author and Florida consultant Edwin J. Dunstan Jr. refined his model based on observations from…
Read MoreRMC 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.
Read MoreDurlach 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…
Read MoreResearch 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.
Read MoreOptimizing 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.
Read More