01158112

Component

As sustainability becomes an increasingly important element in the design and construction of transportation infrastructure, approaches to reduce the environmental footprint of concrete become more attractive. Concrete, as the most commonly used construction material on the planet, has a significant environmental impact. Although portland cement is a relatively minor constituent by volume, its presence is responsible for 90 to 95 percent of the CO2 associated with concrete. The key to reducing the carbon footprint of concrete is to reduce the amount of portland cement used. One way to accomplished this is by using alternative cement binders. ASTM C1157 performance specified cements are relatively new to the market, having no chemical or physical requirements other than they must meet certain physical performance test requirements. Colorado is one of five state DOTs that allow the use of ASTM C1157 cements. Three case studies are presented the show that slipform paving concrete made with ASTM C1157 cement are readily constructable and can easily achieve specified strength requirements. These cements were used in mixtures that also contained fly ash demonstrating their versatility. Due to the newness of the specification, long-term performance data does not exist.

01147878

10-1355

English

9p

2010

Transportation Research Board 89th Annual Meeting

DVD

Figures (1) ; Photos (4) ; References (9) ; Tables (1)

Binders; Carbon dioxide; Concrete; Environmental impacts; Field tests; Fly ash; Pavements; Performance based specifications; Portland cement

Transportation infrastructure

Colorado

Environment; Highways; Materials; I32: Concrete

Transportation Research Board Annual Meeting 2010 Paper #10-1355

TRIS, TRB

Jan 25 2010 10:36AM