Kou S C, Lee G, Poon C S, Lai W L
Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong.
Waste Manag. 2009 Feb;29(2):621-8. doi: 10.1016/j.wasman.2008.06.014. Epub 2008 Aug 8.
This paper aims to investigate the fresh and hardened properties of lightweight aggregate concretes that are prepared with the use of recycled plastic waste sourced from scraped PVC pipes to replace river sand as fine aggregates. A number of laboratory prepared concrete mixes were tested, in which river sand was partially replaced by PVC plastic waste granules in percentages of 0%, 5%, 15%, 30% and 45% by volume. Two major findings are identified. The positive side shows that the concrete prepared with a partial replacement by PVC was lighter (lower density), was more ductile (greater Poisson's ratios and reduced modulus of elasticity), and had lower drying shrinkage and higher resistance to chloride ion penetration. The negative side reveals that the workability, compressive strength and tensile splitting strength of the concretes were reduced. The results gathered would form a part of useful information for recycling PVC plastic waste in lightweight concrete mixes.
本文旨在研究轻质骨料混凝土的新拌性能和硬化性能，这些混凝土是使用从废弃聚氯乙烯（PVC）管中回收的塑料废料替代河砂作为细骨料制备而成的。对一些实验室制备的混凝土混合料进行了测试，其中河砂被PVC塑料废料颗粒按体积百分比0%、5%、15%、30%和45%部分替代。确定了两个主要发现。积极的一面是，用PVC部分替代制备的混凝土更轻（密度更低），更具延性（泊松比更大且弹性模量降低），干燥收缩更低且抗氯离子渗透能力更高。消极的一面是，混凝土的工作性、抗压强度和劈裂抗拉强度降低。所收集的结果将成为在轻质混凝土混合料中回收PVC塑料废料的有用信息的一部分。
