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Kansas, Texas deals bring Summit Materials 12 ready mixed plants

Sources: Summit Materials Inc., Denver; CP staff

Summit Materials has significantly boosted its Kansas ready mixed production capacity, acquiring Concrete Supply of Topeka/Builders Choice Concrete, while also extending its Houston presence by closing on Southwest Ready Mix and Colorado County Sand & Gravel.

Read more: Kansas, Texas deals bring Summit Materials 12 ready mixed plants

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