Effect of wrapping treament of lightweight aggregate on the homogeneity of concrete

Author(s): Xianwei Ma, Xin Yu, Jina Wang and Zhixin Li
Paper category: Proceedings
Book title:4th International Symposium on Design, Performance and Use of Self-Consolidating Concrete
Editor(s): Caijun Shi & Zuhua Zhang, Hunan University, China
Kamal Henri Khayat, Hunan University, China
Missouri University of Science & Technology, USA
ISBN:978-2-35158-204-6
e-ISBN:978-2-35158-205-3
Publisher: RILEM Publications SARL
Publication year:2018
Pages:112-121
Total Pages:10
Language : English

Abstract: The distribution uniformity of lightweight aggregate (LWA) in concrete directly affects on the performance of LWA concrete. LWA was wrapped by cementitious materials in this paper. The physical properties of LWA and its effects on workability, apparent density and strength of concrete were studied before and after treatment. The homogeneity of concrete was analyzed by segregation resistance experiment. The results showed that the apparent density of wrapped LWA (WLWA) is increased, and the rate of water absorption is decreased significantly. When WLAW was added, the segregation resistance and strength of concrete is improved. The distribution uniformity of LWA in hardened concrete is significantly increased. The interface of LAW and cement paste is not affected. Wrapping treatment is an effective method to improve the homogeneity of LWA in concrete.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00