Influence of Mineral Admixtures on early Shrinkage of Ordinary Concrete

Li Feng Zhang; Jun Ying Lai; Xiao Qian Qian; De Long Hu

doi:10.4028/www.scientific.net/AMR.450-451.135

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 450-451Influence of Mineral Admixtures on early Shrinkage...

Influence of Mineral Admixtures on early Shrinkage of Ordinary Concrete

Abstract:

In this paper the influence of mineral admixtures on early shrinkage of ordinary concrete with the same water-binder ratio is studied by self-made equipment and CABR-NES deformation instrument developed by China Academy of Building Research Institute. All concrete specimens are cured with one surface exposed to air and others are covered with plastic film. The replacement ratio of mineral admixtures is 10%, 20% and 30%, respectively, and a mixture of a combination of both fly ash and slag is also studied. The results indicate fly ash reducing the early shrinkage of ordinary concrete, and the shrinkage decreases with the increasing of replacement ratio, but the effect is not so significant when the replacement ratio is above 20%. Slag also reduces the early shrinkage of ordinary concrete, and the shrinkage decreases with the increasing of replacement ratio, but the effect is not so significant when the replacement ratio is below 20%. Mixture with a combination of both fly ash and slag has lower shrinkage than mixture with fly ash.

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Periodical:

Advanced Materials Research (Volumes 450-451)

Pages:

135-139

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.450-451.135

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Online since:

January 2012

Authors:

Li Feng Zhang, Jun Ying Lai, Xiao Qian Qian, De Long Hu

Keywords:

Concrete, Early Shrinkage, Fly Ash (FA), Slag

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