Concrete Sustainability Hub looks to economy, environment in decade two

Sources: Massachusetts Institute of Technology; RMC Research & Education Foundation, Portland Cement Association, Alexandria, Va.; CP staff

The Ready Mixed Concrete Research & Education Foundation and Portland Cement Association have marked the Massachusetts Institute of Technology-hosted Concrete Sustainability Hub’s 10th anniversary with a five-year, $10 million commitment and eye to solutions for economic, environmental, and social challenges.

Read More

MIT CSHub researchers target ASR gel’s destructive underpinnings

Sources: Concrete Sustainability Hub, Cambridge, Mass.; CP staff

In their current Research Brief, “Simulating the Formation of ASR Gels,” staff at the Massachusetts Institute of Technology-hosted Concrete Sustainability Hub (CSHub) shed new light on conditions, mechanics and protracted timelines surrounding alkali-silica reactivity in concrete. 

Read More

Life-cycle perspective backs report on critical issues in building practices

IMAGE

A new report from the Massachusetts Institute of Technology-hosted Concrete Sustainability Hub (CSHub), Critical Issues When Comparing Whole Building and Building Product Environmental Performance, addresses key concepts in quantifying the environmental impact of buildings and products comprising them. It also makes recommendations for current and future building practices using life cycle assessment (LCA), and offers suggestions for research to advance future study and practice.

Read More

CSHub at MIT develops hazard mitigation metric

CSHub at MIT develops hazard mitigation metric

The Concrete Sustainability Hub at Massachusetts Institute of Technology has developed Break Even Mitigation Percent (BEMP), a new tool to estimate the cost of weather hazards on a building. In a new research brief, “A break-even hazard mitigation metric,” CSHub staff finds that a $10 million non-engineered wood building is expected to face more than half a million dollars in hazard related damages over 50 years, while a $10 million engineered concrete building is expected to face only $165,000 over the same period.

Read More

MIT researchers develop hazard mitigation metric for construction specs

Sources: National Ready Mixed Concrete Association, Silver Spring, Md.; Concrete Sustainability Hub at Massachusetts Institute of Technology, Cambridge; CP staff

The MIT-hosted Concrete Sustainability Hub has developed Break Even Mitigation Percent (BEMP), a new tool to estimate the cost of weather hazards on a building. In its July research brief, “A break-even hazard mitigation metric,” CSHub staff finds that a $10 million non-engineered wood building is expected to face more than half a million dollars in hazard related damages over 50 years, while a $10 million engineered concrete building is expected to face only $165,000 over the same period.

Read More

PCA TO FEDS: PAVEMENTS PART OF VEHICLE FUEL ECONOMY, LOWER EMISSIONS EQUATION

Responding to the White House’s second phase of fuel economy standards for heavy-duty trucks, targeted for 2015-16 rulemaking and implementation, Portland Cement Association CEO Gregory Scott noted, “We should expand the debate beyond making more efficient [vehicles] to making more efficient infrastructure.”

Read More

MICROSTRUCTURE-BASED KINETICS MODEL

MICROSTRUCTURE-BASED KINETICS MODEL

A November 2013 CSHub research profile letter, “Early hydration: A local business,” charts calorimetry (heat measurement) curves from tricalcium silicate paste experiments—with specimens of three particle size distributions (PSD)—to support a proposed model of microstructure-based kinetics. It suggests a “reaction zone” extending a few micrometers in from the cement particle surface, and can reconcile longtime observations on PSD and water/cement ratio.

Read More