The cloud of proposed Environmental Protection Agency regulations governing the handling and disposal of coal combustion residuals (CCR), including construction-grade fly ash, prompted an American Road & Transportation Builders Association Transportation Development Foundation (ARTBA-TDF) report to forecast potential economic impacts on the subtraction of ASTM C 618 product from the transportation infrastructure supply chain.Read More
ARTBA Senior Economist Alison Premo Black examines in “The Economic Impacts of Prohibiting Coal Fly Ash Use in Transportation Infrastructure Construction” how states would have to forego potential savings derived from using the supplementary binding agent in new, high performance concrete pavements.Read More
Source: CP Staff; Aggregate Industries US, Rockville, Md.
In conjunction with the liquidation of a U.K. operator, Ennstone Plc, Aggregate Industries US, a member of the Holcim Group, closed the asset purchase agreement it entered into with Falmouth, Va.-based Ennstone, Inc., a construction materials company with ready mixed, sand & gravel and limestone operations serving commercial, residential and industrial projects in the state.Read More
Sources: CP staff; Transamerica Pyramid Properties LLC and BuildingWise LLC, San Francisco; U.S. Green Building Council, Washington, D.C.
By Don Marsh
Exposed, white quartz-aggregate cladding was cited with a “cool roof” effect as Transamerica Pyramid owners pursued (Leadership in Energy & Environmental Design-Existing Building) LEED-EB Platinum certification for their San Francisco landmark. Completed in 1972, the 853-ft. tower is enclosed with 3,920 precast pieces totaling 360,000 sq. ft. of surface.Read More
Source: CP staff; Precast/Prestressed Concrete Institute, Chicago
By Don Marsh
PCI has formally launched its Sustainable Plant Program for producer members, releasing tracking tool and guidance documents during its 2011 convention in Salt Lake City. The PCI Sustainability Council is rolling out the voluntary program in three levels, from 2012–2014.Read More