Title: Making Concrete "Greener" with Fly Ash

Author(s): V. M. Malhotra

Publication: Concrete International

Volume: 21

Issue: 5

Appears on pages(s): 61-66

Keywords: cement additives; CO2 emissions; concretes; fly ash; greenhouse gas

DOI:

Date: 5/1/1999

Abstract:
The World Earth Summits in Rio de Janeiro, Brazil, 1992, and in Kyoto, Japan in 1997, have, in no uncertain terms, emphasized the dangers associated with the unchecked increase in CO2 and other greenhouse gas emissions to the atmosphere, and their undesirable effects on climate change. As a result, most industrialized countries are in the process of formulating regulations to stabilize these emissions to 1990 levels by 2010. This article describes the amount of CO2 being contributed by the portland cement industry, and discusses how these emissions can be reduced considerably by the increased use of large volumes of fly ash and other supplementary cementing materials in the concrete industry.