Shrinkage Performance and Cracking Resistance Mechanism of Rubberized Lightweight Aggregate Concrete with Polymer

Ji Wang; Yue Li; Ming Zhong Zhang

doi:10.4028/www.scientific.net/KEM.385-387.817

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 385-387Shrinkage Performance and Cracking Resistance...

Shrinkage Performance and Cracking Resistance Mechanism of Rubberized Lightweight Aggregate Concrete with Polymer

Abstract:

To improve the cracking resistance of lightweight aggregate concrete, rubber particles and polymer were added. Experimental results showed that the shrinkage rate increased when rubber particles were added into lightweight aggregate concrete, but when polymer was mixed, the shrinkage rate decreased dramatically. Microstructure analysis indicated that the interface transition zone (ITZ) influenced the shrinkage performance of rubberized lightweight aggregate concrete with polymer directly; the ITZ bondage between rubber particles and cement matrix was very poor and the restriction to shrinkage was weak, which were the main reasons for the increase of shrinkage rate of rubberized lightweight aggregate concrete; when polymer was mixed into the concrete, the hole and ITZ structure of concrete were improved, which made the strain energy absorbing function of rubber particles can be exerted entirely and the flexibility of ITZ was boosted, thereby the shrinkage performance and cracking resistance of lightweight aggregate concrete were improved.

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Periodical:

Key Engineering Materials (Volumes 385-387)

Pages:

817-820

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.385-387.817

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Online since:

July 2008

Authors:

Ji Wang, Yue Li, Ming Zhong Zhang

Keywords:

Lightweight Aggregate Concrete (LWAC), Polymer, Rubber Particle, Shrinkage Performance, Unterface Transition Zone (ITZ)

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