INVESTIGATION OF INTERFACIAL INTERACTIONS BETWEEN LIGHTWEIGHT AGGREGATE AND MORTAR ON THE MECHANICAL PROPERTIES AND CHLORIDE ION TRANSMISSION OF CONCRETE

Author(s): Shih W. Cho, Wen C. Liu
Paper category: Proceedings
Book title: Proceedings of CONSEC13 Seventh International Conference on Concrete under Severe Conditions - Environment and Loading Volume I
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 523-534
Total Pages: 961
Language : English

Abstract: The interface between aggregate and mortar or paste is a weak phase. It will have a serious effect on mechanical properties and durability of concretes. Because the high porosity and water absorption of the lightweight aggregate, the interface of lightweight concrete is different from that of normal weight concrete. In this research, the effect of interfacial interactions between lightweight aggregate and mortar on the mechanical and chloride ion transport properties of concretes was investigated. Test variables include the volume fraction of lightweight aggregate and the water-cement ratio. The elastic modulus, charges passed from RCPT, chloride ion penetration depth were determined. In the theoretical analysis part, lightweight aggregate can be considered as a three phase composite material (mortar, lightweight aggregate, interfacial transition zone). In addition, SEM and EDX is used to observe the microstructure of the interface.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00