外加剂对半流动性自密实混凝土滑模施工性能的影响

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Abstract Semi-flowable self-compacting concrete is a new type of concrete for slip-form construction, which has self-compacting and fast shape-holding ability for slip-form paving. Adding additives is the main measure to achieve this performance. In this study, rheological curves, spread and slump tests were used to characterize the performance of slip-form construction. Laboratory slip-form paving tests were carried out to study the effects of thixotropic agent, superplasticizer and air entraining agent on the slip-form construction performance of semi-flowable self-compacting concrete. The results show that attapulgite can effectively improve the thixotropy of cement concrete, obviously improve the cohesion of mixtures, and improve the shape-holding ability of concrete after slip-form paving. By adjusting the ratio of superplasticizer to thixotropic agent reasonably, concrete with good fluidity and shape stability can be obtained. The surface quality of concrete after slip-form construction can be further improved by adding air entraining agent

Key words： semi-flowable self-compacting concrete additives slip-form construction thixotropy fluidity shape-holding ability

Published: 05 July 2019

CLC number:

TU528

About author:: Yanling Huang was born in March 1996, and she is currently studying for a master’s degree in materials science at the School of Civil Engineering at Central South University.Qiang Yuan is a professor at the Institute of Civil Engineering Materials, School of Civil Engineering, Central South University. He is also a Ph.D. supervisor. He has presided over a number of research projects of the National Natural Science Foundation, the 13th Five-Year Key R & D Program, the Key Projects of the Railway Corporation and the horizontal research projects. He has carried out systematic research work on basic theory and application technology of rheological properties, microscopic properties, mechanical properties and durability of cement-based materials. He has published more than 60 papers, including more than 30 papers by SCI, and 4 monographs. He is invited to write a monograph of English monographs and 6 patents.

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	Articles by authors
	HUANG Yanling
	YUAN Qiang
	LIU Yaoqiang
	ZHAO Hu
	WANG Yueyue
	ZUO Shenghao
	ZHOU Dajun
	SUN Zechuan

Cite this article:

HUANG Yanling,YUAN Qiang,LIU Yaoqiang, et al. Effect of Additives on Slip-form Construction Performance of Semi-flowable Self-compacting Concrete[J]. Materials Reports, 2019, 33(z1): 254-260.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2019/V33/Iz1/254

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