Sources: ASTM International, West Conshohocken, Pa.; CP staff ASTM Committee C09 on Concrete and Concrete Aggregates will present Workshop on Next Generation Cements and SCMs: Towards Specification on June 9 in conjunction with standards development meetings in Philadelphia. Workshop organizers cite the rise of new concrete binding agents, often from start-up operators, that do not fall under existing specifications. The…
Read MoreTag: Concrete Aggregates
National Science Foundation funds Roman concrete investigation
A researcher at Missouri University of Science and Technology, Rolla, is looking to solve the problems of tomorrow by using chemistry from the distant past. Assistant Professor of Chemical and Biochemical Engineering Dr. Monday Uchenna Okoronkwo is investigating how to mimic the chemistry and composition of ancient Roman concrete while also applying modern technology to make today’s slabs, structures and…
Read MoreStandard gauges fibrous concrete pre-, post-peak tensile properties
Sources: ASTM International, West Conshohocken, Pa.; CP staff ASTM C09 Committee on Concrete and Concrete Aggregates’ WK 73384, New Test Method for Evaluating the Tensile Performance of Fiber-Reinforced Concrete Using Cylindrical Specimens with Double-Punch Loading, could open conventional fiber-reinforced and ultra-high performance concrete (FRC, UHPC) to a broader range of engineered construction conditions. The proposed standard is under full committee…
Read MoreC09 subcommittee pens wide-ranging SCM performance specification
Sources: ASTM International, West Conshohocken, Pa.; CP staff ASTM Committee C09 on Concrete and Concrete Aggregates is balloting WK70466, New Specification for Supplementary Cementitious Material for Use in Concrete, covering a broad range of binders and offering a better method of gauging their potential than ASTM C618, Standard Specification for Coal Ash and Raw or Calcined Natural Pozzolan for Use…
Read MoreLehigh Hanson builds aggregates recycling capacity in Pacific Northwest
Lehigh Hanson has acquired JEV Recycling Inc., which runs a major concrete and asphalt materials facility in Woodinville, Wash. The deal times with the addition of a similar operation in Redmond, Wash. at Cadman Inc., Lehigh Hanson’s Pacific Northwest franchise and a key Seattle market ready mixed and aggregates player. The new facility processes slab or structural rubble into recycled…
Read MoreASTM C09, C01 honor Cemex’s Moody, PCA’s Tennis
Sources: ASTM International, West Conshohocken, Pa.; CP staff ASTM International has presented its top individual honor, Award of Merit, to Cemex USA Senior Manager of Quality, Masonry Greg Moody for contributions to Committee C09 on Concrete and Concrete Aggregates. The award and accompanying title of ASTM Fellow recognize his technical work, administrative leadership during chair and subcommittee chair terms, plus…
Read MoreStandard 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.
Read MoreASTM Committee C09 observes centennial in Toronto
A group of 150 members and stakeholders commemorated ASTM Committee C09 on Concrete and Concrete Aggregates’ 100th anniversary amid recent committee week activities in Toronto. Chairman Steve Parker (Chryso Inc.) and past chairs Doug Hooton (University of Toronto) and Tony Fiorato (PCA, CTL, Slag Cement Association) weighed in on Committee C09’s progress, credibility and vast influence on concrete practice.
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