Mortars containing waste plastic from WEEE as replacement of natural aggregate: different strategies to achieve good mechanical properties

IF 1.8 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY
Luca Lavagna, Daniel Suarez-Riera, Nicoletta Mangani, Matteo Pavese
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引用次数: 0

Abstract

The use of waste plastic from Waste Electrical and Electronic Equipment (WEEE) as a substitute for natural aggregate in cementitious materials is an increasingly relevant issue. In fact, this would allow to recycle plastics destined for landfills and to decrease the use of new natural resources. However, replacing sand with plastic tends to reduce the mechanical properties of mortars due to the different mechanical properties between the natural aggregate and the waste plastic and the poor interfacial compatibility between the plastic and the cement paste. This work used several strategies to improve the mechanical properties of mortars containing waste plastic. The addition of 1 % of superplasticizer coupled with a lower w/c ratio succeeds in restoring the mechanical properties to values equal to a standard mortar prepared with the natural aggregate, thus obtaining a material that can be used in the construction field.
含WEEE废塑料的砂浆替代天然骨料:不同的策略实现良好的力学性能
利用废旧电器电子设备(WEEE)中的废塑料作为胶凝材料中天然骨料的替代品是一个日益相关的问题。事实上,这将允许回收运往垃圾填埋场的塑料,并减少对新自然资源的使用。然而,由于天然骨料与废塑料的力学性能不同,塑料与水泥浆体的界面相容性差,因此以塑代砂往往会降低砂浆的力学性能。这项工作采用了几种策略来改善含有废塑料的砂浆的机械性能。加入1%的高效减水剂,再加上较低的水灰比,成功地将机械性能恢复到与天然骨料制备的标准砂浆相同的值,从而获得可用于建筑领域的材料。
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来源期刊
Magazine of Concrete Research
Magazine of Concrete Research 工程技术-材料科学:综合
CiteScore
4.60
自引率
11.10%
发文量
102
审稿时长
5 months
期刊介绍: For concrete and other cementitious derivatives to be developed further, we need to understand the use of alternative hydraulically active materials used in combination with plain Portland Cement, sustainability and durability issues. Both fundamental and best practice issues need to be addressed. Magazine of Concrete Research covers every aspect of concrete manufacture and behaviour from performance and evaluation of constituent materials to mix design, testing, durability, structural analysis and composite construction.
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