The potential use of crushed waste glass as a sustainable alternative to natural and manufactured sand in geotechnical applications
The potential use of crushed waste glass as a sustainable alternative to natural and manufactured sand in geotechnical applications
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DOI：
10.1016/j.jclepro.2020.124762
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发表时间：
2021-01-07
影响因子：
11.1
通讯作者：
Cheng, Yi Pik
中科院分区：
文献类型：
--
作者：
Kazmi, Danish;Serati, Mehdi;Cheng, Yi Pik
建筑用砂的价格上涨和储量减少，促使人们需要开发可持续且具有成本效益的替代品，以帮助向循环经济过渡。废玻璃是天然砂的衍生物，可能表现出类似的岩土工程行为。使用粉碎的废玻璃（CWG）作为传统砂的替代品，将有助于解决天然砂枯竭和处理日益增加的废玻璃的地质环境挑战，从而可能提供双重效益。本研究调查了土工，矿物学和形态学行为的CWG，并将其与天然砂（NS）和机制砂（MS）。土工特性的结果表明，CWG的行为是类似于其他两个砂研究，与CWG表现出最高的渗透性和耐磨性。令人惊讶的是，剪切强度测试显示，CWG的摩擦角在饱和条件下比在干燥条件下更高，表明CWG在饱和条件下的稳定性。使用X射线荧光（XRF）光谱进行了矿物学分析，并显示二氧化硅是所有三种材料中的主要矿物，表明它们的化学成分相似。使用通过光学显微镜获得的数字图像进行形态分析，以圆度指数量化每种材料的颗粒形状。结果表明，MS的颗粒棱角性最大，其次是CWG和NS。总体而言，可以得出结论，CWG有可能作为下一代替代和智能岩土材料，在几个岩土工程应用中取代传统的砂。视频摘要：在此视频摘要中，作者介绍了发表在Journal of Cleaner Production上的跨机构研究的主要动机，分析和结论（JCR：Q1，SJR：Q1，2019年期刊影响因子：7.2,根据本文发表时的Google Scholar指标，在可持续发展方面排名全球第一）。这项研究调查了在岩土工程建设中，增加废玻璃作为消耗天然砂和人工砂的可持续替代品。该研究比较了碎废玻璃与两种传统建筑用砂的岩土工程、矿物学和形态学特性。研究结果表明，碎废玻璃的岩土工程行为与传统建筑用砂相似，有时甚至上级。总的来说，可以得出结论，粉碎的废玻璃可以作为一种替代和智能的地质材料，最终促进废玻璃的回收利用，减轻垃圾填埋场的负担，保护自然资源，所有这些都有助于向循环经济过渡。youtube链接：https://youtu.be/pGVoJ1QYWUA（C）2020爱思唯尔有限公司版权所有。
The increasing price and diminishing reserves of construction sand encourage a need to develop its sustainable and cost-effective replacement, helping the transition towards a circular economy. Waste glass is a derivative of natural sand and could potentially show similar geotechnical behaviour. Using crushed waste glass (CWG) as an alternative to traditional sand would potentially offer a double-duty benefit by helping to address the geo-environmental challenges of natural sand depletion and disposal of ever-increasing waste glass, together. This study investigated the geotechnical, mineralogical and morphological behaviour of CWG and compared it with that of natural sand (NS) and manufactured sand (MS). The geotechnical characterisation results showed that the behaviour of CWG is similar to the other two sands studied, with CWG showing the highest permeability and abrasion resistance. Surprisingly, the shear strength testing showed that the friction angle of CWG was higher under saturated conditions than under dry conditions, indicating the stability of CWG under saturated conditions. The mineralogical analysis was conducted using x-ray fluorescence (XRF) spectroscopy and revealed that silica is the dominant mineral in all three materials, indicating a similarity in their chemical composition. The morphological analysis was performed to quantify the particle shape of each material in terms of roundness index using digital images obtained through an optical microscope. The results demonstrated that MS showed the highest particle angularity, followed by CWG and NS. Overall, it was concluded that CWG could potentially act as a next-generation alternative and smart geomaterial, replacing traditional sands in several geotechnical applications.Video Abstract: The authors in this video abstract present the key motivations, analyses performed, and conclusions of cross-institutional research published in the Journal of Cleaner Production (JCR: Q1, SJR: Q1, 2019 journal impact factor: 7.2, ranked number# 1 worldwide in Sustainable Development according to Google Scholar metrics at the time of this article publication).This research investigated the potential use of ever-increasing waste glass as a sustainable alternative to depleting natural and manufactured sand in geotechnical construction. The study compared the geotechnical, mineralogical and morphological behaviour of crushed waste glass with that of two traditional types of construction sand. The findings showed that the geotechnical behaviour of crushed waste glass is similar, or sometimes even superior, to traditional construction sands. Overall, it was concluded that crushed waste glass could potentially serve as an alternative and smart geomaterial, ultimately promoting the recycling of waste glass, reducing the burden on landfill and conserving natural resources, all helping the transition towards a circular economy. youtube link: https://youtu.be/pGVoJ1QYWUA (C) 2020 Elsevier Ltd. All rights reserved.