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Holcim flagship books first Liebherr electric mixer truck order

Sources: Liebherr-Mischtechnik GmbH, Designwerk Products AG, Germany; CP staff

Germany's Liebherr and Designwerk have developed the first fully electric concrete mixer trucks with 10- or 12-m³ drums on a five-axle chassis. The models are scheduled to premier later this year in Holcim and KIBAG fleets in Switzerland, where five-axle mixers with 40-tonne GVW are legal.

Read more: Holcim flagship books first Liebherr electric mixer truck order

Sika answers permeability with hydrophobic and hydrophilic admixtures

Sources: Sika Corp., Lyndhurst, N.J.; CP staff  

The introduction of a powdered, concrete plant-dispensed agent positions Sika as the only admixture producer to offer the two core permeability reducing technologies: hydrophilic crystalline and hydrophobic pore blocking. The hydrostatic application-geared WT-240 P is in the former category and meets ASTM C-494 Type S requirements. Its moisture activated compounds produce insoluble crystalline deposits that form within the capillary system. The crystalline formulations have the ability to reduce capillary pore size and prevent water penetration in concrete slabs or structures.

Read more: Sika answers permeability with hydrophobic and hydrophilic admixtures

Quikrete extends 3D printing reach in housing unit demonstration

Source: Quikrete Companies, Atlanta

Quikrete and California-based Contour Crafting Corp. have entered into a collaboration to develop proprietary concrete used in the automated construction of residential, commercial, industrial and government structures using the latter’s technology. Following comprehensive testing at an independent accredited lab at the University of Southern California to confirm ICC-ES AC509 compliance—a building code spearheaded by CC Corp.—the 3D printing process will be used to construct four low-income housing units as part of a demonstration project sponsored by the Los Angeles County Development Authority.

Read more: Quikrete extends 3D printing reach in housing unit demonstration

Northeast foundations catastrophe spawns USGS pyrrhotite reference

Sources: U.S. Geological Survey; CP staff 

The U.S. Geological Survey has developed the first map of rock deposits exhibiting the potential to contain or form pyrrhotite, whose presence in otherwise ASTM C33 aggregate can prove extraordinarily deleterious in concrete. The map is part of a new fact sheet, "Pyrrhotite Distribution in the Conterminous United States," whose publication abides a Congressional directive addressing widespread residential foundation failure cases in Connecticut and Massachusetts. 

Read more: Northeast foundations catastrophe spawns USGS pyrrhotite reference

Charah lands 2M-ton ash processing contract in Southeast

Sources: Charah Solutions Inc., Louisville, Ky.; CP staff

A Southeastern utility has tapped Charah Solutions for a Closure by Removal impoundment project encompassing upward of 100 acres of ash deposits at a coal-fired power station that was retired in 2015. Work will include installation of environmental controls plus rail infrastructure improvements and extension, along with loadout area construction. Over a multi-year contract, Charah anticipates processing of 2 million-plus tons of impounded material for beneficial use as concrete-grade fly ash, while preparing the former pond acreage to be restored as usable property. 

Read more: Charah lands 2M-ton ash processing contract in Southeast