Ground limestone exhibits mixture paste content optimization potential

21 NIST i

Keen on lower carbon alternatives to portland cement-only binders, the U.S. Department of Commerce’s National Institute of Standards and Technology has published Technical Note 1906, Minimizing Paste Content in Concrete Using Limestone Powders — Demonstration Mixtures. Researchers cite target performance levels in concrete mixtures with up to 28 percent lower portland cement content using a binary blend with limestone powder.

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New ASTM standard informs sustainable manufacturing

Source: ASTM International, West Conshohocken, Pa.

ASTM Committee E60 on Sustainability has developed E3012, Guide for Characterizing Environmental Aspects of Manufacturing Process, to help businesses incorporate sustainable practices and transition into science-based modeling, decision-making and production.

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NIST spells role of ground limestone in optimizing mixture paste content

Sources: National Institute of Standards and Technology (NIST), Gaithersburg, Md.; CP staff

Keen on lower carbon alternatives to portland cement-only binders, the U.S. Department of Commerce-backed NIST has published Technical Note 1906, Minimizing Paste Content in Concrete Using Limestone Powders – Demonstration Mixtures. Researchers cite target performance levels in concrete mixtures with up to 28 percent lower portland cement content using a binary blend with limestone powder.

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First code improvements adopted based on Feds’ Joplin tornado study

8 NISTi 150

Protecting schools and their associated high-occupancy buildings from violent tornadoes is the goal of the first approved building code changes based on recommendations from the National Institute of Standards and Technology (NIST) technical investigation into the impacts of the May 2011 tornado that devestated Joplin, Mo.

 
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Standard on mixes’ electrical resistance spells critical quality control data

Sources: ASTM International, West Conshohocken, Pa.; CP staff

The proposed ASTM WK50586, Practice for Measuring the Electrical Resistance of Fresh Concrete standard will show how to sample a load, prepare a mix specimen for evaluation and conduct measurements—the latter yielding information on water-cement ratio, initial setting time, compressive strength, and overall concrete quality.

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Building agency stresses STEM-wise workforce, code compliance in report to Congress

Source: National Institute of Building Sciences (NIBS), Washington, D.C.

The NIBS 2013 report, Moving Forward: Findings and Recommendations from the Consultive Council, spans five key areas: The Building Workforce; Guidance on the Use of Non-Potable Water; Understanding the Energy/Water Nexus; Supporting the Existing State and Local Building Regulatory Infrastructure; and, Developing the Business Case for Private Sector Investment in Hazard Mitigation. Among recommendations in the eight-page document:

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