Autogenous shrinkage of high strength lightweight aggregate concrete

Ding Qingjun; Tian Yaogang; Wang Fazhou; Zhang Feng; Hu Shuguang

doi:10.1007/BF02841302

Journal of Wuhan University of Technology Materials Science Edition ›› 2005, Vol. 20 ›› Issue (4) : 123 -125. DOI: 10.1007/BF02841302

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Autogenous shrinkage of high strength lightweight aggregate concrete

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Abstract

The characteristic of autogenous shrinkage (AS) and its effect on high strength lightweight aggregate concrete (HSIAC) were studied. The experimental results show that the main shrinkage of high strength concrete is AS and the amount of cement can affect the AS of HSLAC remarkably. At the early stage the AS of HSIAC is lower than that of high strength normal concrete, but it has a large growth at the later stage. The AS of high strength normal concrete becomes stable at 90 d age, but HSIAC still has a high AS growth. It is found that adjusting the volume rate of lightweight aggregate, mixing with a proper dosage of fly ash and raising the water saturation degree of lightweight aggregate can markedly reduce the AS rate of HSIAC.

Keywords

high strength lightweight aggregate concrete / autogenous shrinkage / lightweight aggregate / volume rate

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Ding Qingjun, Tian Yaogang, Wang Fazhou, Zhang Feng, Hu Shuguang. Autogenous shrinkage of high strength lightweight aggregate concrete. Journal of Wuhan University of Technology Materials Science Edition, 2005, 20(4): 123-125 DOI:10.1007/BF02841302

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