Recycling waste latex paint in concrete
Recycling waste latex paint in concrete
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DOI：
10.1016/s0008-8846(02)01084-0
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发表时间：
2003-06-01
影响因子：
11.4
通讯作者：
Sumner, J
中科院分区：
文献类型：
--
作者：
Nehdi, M;Sumner, J
目前，在加拿大安大略省，市政当局收集的危险废物 (HZW) 总量中约 21.7% 是废油漆。仅废弃乳胶漆 (WLP) 就占 HZW 总量的 12%。据估计，目前只有 10-30% 的废物被收集，但随着公共教育的努力，这一比例正在不断增加。此外，由于对挥发性有机化合物（VOC）的环境法规越来越严格，与溶剂型和油基醇酸树脂相比，乳胶漆的产量将会增加。这将导致安大略省和整个北美每年产生更多的 WLP。目前此类废物的处理成本在每升 0.90 加元至 1.40 加元之间。这项研究是与安大略省伦敦市和安大略省油漆和涂料协会合作进行的，旨在调查在混凝土中回收 WLP 的好处，特别关注混凝土人行道。 WLP 用于混凝土混合物中，既可以部分替代原生乳胶，也可以用于混合水。本文表明，掺入 WLP 的混凝土混合物可以具有改善的和易性、更高的弯曲强度、更低的氯离子渗透性、更好的抗除冰盐表面结垢能力，并且由于需要更少的减水和引气外加剂而更加经济。研究结果还表明，每年的城市混凝土人行道建设可以使用每年生产的 WLP，同时生产出具有增强性能和耐久性的人行道。 (C) 2003 Elsevier Science Ltd. 保留所有权利。
Currently, in Ontario, Canada, around 21.7% of the total hazardous waste (HZW) collected by municipalities is waste paint. Waste latex paint (WLP) alone constitutes 12% of the total HZW. It is estimated that only 10-30% of this waste is presently being collected but this proportion is growing with public education efforts. In addition, due to increasingly more stringent environmental regulations on volatile organic compounds (VOCs), more latex-based paints will be produced compared to solvent- and oil-based alkyds. This will result in more WLP being generated annually in Ontario and across North America. The disposal cost of such waste currently varies between Can$0.90 and Can$1.40 per litre. This study was conducted in collaboration with the City of London, Ontario and the Ontario Paints and Coatings Association and aims at investigating the benefits of recycling WLP in concrete with a special focus on concrete sidewalks. WLP was used in concrete mixtures both as a partial replacement for virgin latex and for mixing water. This paper demonstrates that concrete mixtures incorporating WLP can have improved workability, higher flexural strength, lower chloride ion penetrability, better resistance to deicing salt surface scaling and can be more economic because they require less water-reducing and air-entraining admixtures. The results also indicate that the annual urban concrete sidewalk construction could use the yearly production of WLP while producing sidewalks with enhanced properties and durability. (C) 2003 Elsevier Science Ltd. All rights reserved.