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《Concrete》 2007-12
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Influences of synergy effect retarders with superplasticizers on the performances of sulfo-aluminate expansive agents

ZHANG Sheng-ju1a,WANG Xin-gang1b,HE Ting-shu2,ZANG Xiu-ping1a,SHEN Fu-qiang2(1a.School of Naval Architecture & Ocean Engineering; 1b.School of Biology & Environmental Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China; 2.College of Material Science & Engineering,Xi'an University of Architecture & Technology,Xi'an 710055,China)  
The influences of synergy effect of sodium tripolyhosphate,sodium gluconate and naphthalene series,amino sulfonic superplasticizers on the performances of sulfo-aluminate expansive agents were investigated respectively.The results showed that the synergy effect of retarders used together with superplasticizers can reduce the restrained-expansion rate and free-expansion rate of ulfo-aluminate expansive agents' mortar specimens in water or air curing condition,but the expansion indexes of mortar specimens at 28 d in water curing condition increase,so resulting in the reduction of efficient expansion energy of expansive agent.Therefore,under the same amount used,synergy effect of retarders and superplasticizers can obviously decrease the shrinkage-compensation action or self-stress of sulfo-aluminate expansive agent for concrete.
【CateGory Index】: TU528.042.2;TU528.042.3
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