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Research Letters in Materials Science
Volume 2008 (2008), Article ID 382490, 5 pages
http://dx.doi.org/10.1155/2008/382490
Research Letter

Properties of Cement Mortar with Phosphogpysum under Steam Curing Condition

1R&D Center, Hanil Co., Ltd, Iksan 570-946, South Korea
2Research Center of Industrial Technology, Chonbuk National University, Jeonju 561-756, South Korea

Received 19 July 2007; Accepted 11 January 2008

Academic Editor: Hamlin Jennings

Copyright © 2008 Kyoungju Mun and Seungyoung So. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The purpose of this study is to utilize waste PG as an admixture for concrete products cured by steam. For the study, waste PG was classified into 4 forms (dehydrate, 𝛽 -hemihydrate, III-anhydrite, and II-anhydrite), which were calcined at various temperatures. Also, various admixtures were prepared with PG, fly-ash (FA), and granulated blast-furnace slag (BFS). The basic properties of cement mortars containing these admixtures were analyzed and examined through X-ray diffraction, scanning electron microscopy, compressive strength, and acid corrosion resistance. According to the results, cement mortars made with III-anhydrite of waste PG and BFS exhibited strength similar to that of cement mortars made with II-anhydrite. Therefore, III-anhydrite PG calcined at lower temperature can be used as a steam curing admixture for concrete second production.