Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 22, Issue 7, Pages 1471-1476Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2007.04.001
Keywords
flue gas desulphurization (FGD) gypsum; slag powder; thermal treatment; cement; concrete; utilization
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in this paper, the possibility of flue gas desulphurization (FGD) gypsum as an admixture in cement and concrete was explored. The gypsum was baked at the proper temperature of 200 degrees C for 60 min and then mixed into slag powder forming Compound-slag in which SO3 content was controlled at the optimum ratio of 3.5%. Performances of Portland cement with Compound-slag were further explored. The results show that addition of the gypsum prolongs setting time and increases strength of cement. In addition, adaptability of Portland cement with Compound-slag to concrete plasticizers was also investigated. It is well adapted to melamine and naphthalene super-plasticizers but not to lignosulphonate. (C) 2007 Elsevier Ltd. All rights reserved.
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