Title: Pozzolanic and Cementitious by-Products in Concrete--Another Look

Author(s): P. K. Mehta

Publication: Symposium Paper

Volume: 114

Issue:

Appears on pages(s): 1-44

Keywords: admixtures; blast furnace slag; construction materials; durability; engineering; environments; fly ash; granulating; pozzolans; production methods; silica fume; tests; Materials Research

DOI: 10.14359/1835

Date: 5/1/1989

Abstract:
Updates a 1983 critical review on pozzolanic and cementitious by-products for use in concrete. The by-products included in this report are fly ash, granulated blast-furnace slag, and condensed silica fume. Recently available worldwide statistics on production and utilization rates of these mineral admixtures are given. New information is presented on their physical and chemical characteristics, structure, and reactivity of the glassy phase, mechanisms by which concrete properties are enhanced, and engineering properties of concrete containing siliceous by-products. A special emphasis is given to durability aspects of concretes incorporating fly ash, blast-furnace slag, or condensed silica fume. Finally, the status of standard specifications and test methods is reviewed, and the contribution of siliceous by-products to make concrete an environment-friendly material of construction is emphasized.