Adaptive reuse of waste plastic as binders in composites for sustainable construction

IF 5.3 Q2 ENGINEERING, ENVIRONMENTAL Cleaner Engineering and Technology Pub Date : 2024-10-01 DOI:10.1016/j.clet.2024.100812
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Abstract

Effective and efficient handling of solid waste remains a significant issue, particularly in low- and middle-income countries, and densely populated urban areas. Waste plastic is identified as a major contributor to solid waste streams. This study highlighted the viable reuse of waste Linear low-density polyethylene (LLDPE) plastic as a binder and full replacement for cement in composite blocks. An extrusion technique was adopted to melt the plastic and mix it with the sand fillers to create a homogenous waste plastic binder composite block. Composite block samples were produced at various mixture ratios of 1:1, 1:2, and 1:3 with waste plastic or cement as binder and sand as filler. The composite samples' compressive strength, flexural strength, tensile strength, UPV, thermal conductivity, skid resistance, Cantabro mass loss, and morphology were investigated. In addition, the thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) analysis of the composites were carried out. The results showed that composite blocks containing waste LLDPE plastic as binder exhibited lower compressive strength, higher flexural strength, and tensile strength, better thermal insulation, and abrasion resistance compared to composite blocks containing cement as binder. Meanwhile, the cement binder composite gave better skid resistance when the surface was wet than the waste plastic binder composite. However, the waste LLDPE plastic composite mixes considered gave compressive strength above 5 N/mm2, which is the minimum requirement for building bricks according to BS 3921: 1985.
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将废塑料作为复合材料的粘合剂进行适应性再利用,实现可持续建筑
有效和高效地处理固体废物仍然是一个重大问题,尤其是在中低收入国家和人口稠密的城市地区。废塑料被认为是固体废物流的主要来源。这项研究强调了废弃线性低密度聚乙烯(LLDPE)塑料作为粘合剂的可行再利用,以及在复合砌块中完全替代水泥。研究采用挤压技术熔化塑料,并将其与砂填料混合,制成均匀的废塑料粘合剂复合砌块。以废塑料或水泥为粘合剂,沙子为填料,按 1:1、1:2 和 1:3 的不同混合比例制作了复合砌块样品。研究了复合材料样品的抗压强度、抗弯强度、抗拉强度、UPV、导热性、防滑性、Cantabro 质量损失和形态。此外,还对复合材料进行了热重分析(TGA)和差示扫描量热分析(DSC)。结果表明,与以水泥为粘合剂的复合砌块相比,以废弃低密度聚乙烯塑料为粘合剂的复合砌块具有更低的抗压强度、更高的抗弯强度和抗拉强度、更好的隔热性能和耐磨性。同时,与废塑料粘结剂复合材料相比,水泥粘结剂复合材料在表面潮湿时具有更好的防滑性。不过,根据 BS 3921 标准,废旧 LLDPE 塑料复合材料的抗压强度高于 5 牛顿/平方毫米,这是建筑用砖的最低要求:1985.
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来源期刊
Cleaner Engineering and Technology
Cleaner Engineering and Technology Engineering-Engineering (miscellaneous)
CiteScore
9.80
自引率
0.00%
发文量
218
审稿时长
21 weeks
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