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SCM dosage, w/cm limits lead producer beefs with prescriptive mix designs

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

A survey on prescriptive mix designs reveals requirements NRMCA Research and Engineering Standards Committee members find most onerous: maximum water/cementitious material ratio when not applicable, minimum cementitious material content, plus restrictions on supplementary cementitious material dosages, aggregate characteristics like grading, and SCM type (i.e., Class F fly ash only) or characteristics.

Read more: SCM dosage, w/cm limits lead producer beefs with prescriptive mix designs

Natural Pozzolans, Nanotechnology committees set for ACI fall premiers

Sources: American Concrete Institute, Farmington Hills, Mich.; CP staff

Committee 240, Natural Pozzolans, and Committee 241, Nanotechnology of Concrete, chaired by Lehigh Cement’s Robert Neal and University of Wisconsin-Milwaukee’s Konstantin Sobolev, respectively, will hold inaugural meetings during the ACI Fall 2014 Convention, October 26-30 in Washington, D.C.

Read more: Natural Pozzolans, Nanotechnology committees set for ACI fall premiers

Vulcan Materials expedites Lafarge exit from New Mexico

Sources: Vulcan Materials Co., Birmingham, Ala.; CP staff

Lafarge North America has sold five ready mixed concrete, three asphalt and three  aggregate operations serving the Albuquerque, Rio Rancho and Santa Fe, N.M., markets. The integrated properties comprise one of six third-quarter acquisitions through which Vulcan Materials invested nearly $320 million emanating from the sale of Florida concrete and cement production assets earlier this year.

Read more: Vulcan Materials expedites Lafarge exit from New Mexico