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Utilization of municipal solid waste incineration bottom ash (IBA) aggregates in high-strength pervious concrete
Resources, Conservation and Recycling ( IF 13.2 ) Pub Date : 2021-07-05 , DOI: 10.1016/j.resconrec.2021.105736
Peiliang Shen , Haibing Zheng , Jianxin Lu , Chi Sun Poon

This study presents the use of IBA for the production of eco-pervious concrete, aiming at enhancing the recycling rate of IBA in construction materials. The IBA aggregates are used to replace the natural aggregates (NA) in various percentages (0%, 25%, 50%,75% and 100% by volume). The effect of IBA replacement ratios and casting methods on the mechanical properties, water permeability, porosity, density and thermal conductivity of the pervious concrete were determined. The volume stability of the pervious concrete incorporating IBA was evaluated. The results indicated that the appropriate content of IBA could benefit the mechanical properties due to the internal curing effect of IBA. However, the excessive content of IBA in the pervious concrete led to reduced water permeability, connected porosity and mechanical properties. Even so, the pervious concrete containing 100% IBA could achieve the required permeability and compressive strength for permeable pedestrian pavers (JIS A 5371). In addition, the incorporated IBA in pervious concrete causes little volume expansion from the reaction between alkalis and components consisting of metallic aluminum and glass in IBA owing to its high connected porosity. Furthermore, the pervious concrete incorporated IBA had a low density and thermal conductivity, showing the potential to be applied in thermal insulation areas.



中文翻译:

城市生活垃圾焚烧底灰(IBA)骨料在高强透水混凝土中的应用

本研究介绍了使用 IBA 生产生态透水混凝土,旨在提高建筑材料中 IBA 的回收率。IBA 骨料用于替代各种百分比(体积百分比为 0%、25%、50%、75% 和 100%)的天然骨料 (NA)。确定了IBA替代率和浇注方法对透水混凝土的力学性能、透水性、孔隙率、密度和导热性的影响。评估了掺入 IBA 的透水混凝土的体积稳定性。结果表明,由于IBA的内部固化作用,IBA的适当含量有利于机械性能。然而,透水混凝土中IBA含量过高会导致透水率、孔隙率和力学性能降低。尽管如此,含有 100% IBA 的透水混凝土可以达到透水行人路面所需的渗透性和抗压强度(JIS A 5371)。此外,在透水混凝土中掺入的IBA由于其高连通孔隙率,在IBA中碱与由金属铝和玻璃组成的组分之间的反应引起的体积膨胀很小。此外,掺入 IBA 的透水混凝土具有低密度和导热性,显示出在隔热领域应用的潜力。由于 IBA 的高连通孔隙率,在透水混凝土中掺入的 IBA 几乎不会因碱与 IBA 中由金属铝和玻璃组成的成分之间的反应而导致体积膨胀。此外,掺入 IBA 的透水混凝土具有低密度和导热性,显示出应用于隔热领域的潜力。由于 IBA 的高连通孔隙率,在透水混凝土中掺入的 IBA 几乎不会因碱与 IBA 中由金属铝和玻璃组成的成分之间的反应而导致体积膨胀。此外,掺入 IBA 的透水混凝土具有低密度和导热性,显示出应用于隔热领域的潜力。

更新日期:2021-07-06
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