Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23144
Title: Properties of concrete prepared with PVA-impregnated recycled concrete aggregates
Authors: Kou, SC
Poon, CS 
Keywords: Chloride-ion penetration resistance
Concrete
Polyvinyl alcohol (PVA)
Recycled aggregate
Issue Date: 2010
Publisher: Pergamon Press
Source: Cement and concrete composites, 2010, v. 32, no. 8, p. 649-654 How to cite?
Journal: Cement and concrete composites 
Abstract: This paper reports an experimental study to improve the properties of recycled concrete aggregates (RCA) by their impregnation with polyvinyl alcohol (PVA). The effects of PVA on the development of strength and durability properties of the recycled aggregate concrete were evaluated. The experimental investigation was conducted in two parts. Firstly, the optimal concentration of PVA solution required to improve the recycled aggregates was determined. The RCA was soaked in 6%, 8%, 10%, 12% PVA solutions, and impregnation was conducted under a controlled laboratory environment. Density, crushing value (10% fines value), and water absorption of the PVA impregnated RCA (PI-RCA) were determined. Secondly, the slump, slump loss, compressive and tensile splitting strength, dimensional change (shrinkage) and chloride penetrability of the concretes prepared with the RCA that had been impregnated with the optimal (10%) PVA concentration were determined. It was found that the 10% fines value of the PI-RCA was higher, and the water absorption of the PI-RCA were lower when compared to the untreated RCA. The results show that there was not only an improvement in the mechanical properties of the concrete made with PI-RCA, but also the shrinkage of PI-RCA decreased while the resistance to chloride-ion penetration of the concrete produced increased.
URI: http://hdl.handle.net/10397/23144
ISSN: 0958-9465
EISSN: 1873-393X
DOI: 10.1016/j.cemconcomp.2010.05.003
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