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Recycling of ground jet grouting waste as a supplementary cementitious material
Resources, Conservation and Recycling ( IF 11.2 ) Pub Date : 2023-04-06 , DOI: 10.1016/j.resconrec.2023.106993
Yuelin Li , Ruben Debusschere , Qiang Yuan , Jiabin Li

Jet grouting waste (JGW), a cement-soil mixture, represents a significant solid waste stream from soil consolidation activities. The current disposal of JGW at landfills posed a significant environmental issue in countries with limited land space. In this research, JGW was ground into powders without further special treatment and then used as a cementitious material. The properties of cement-based materials incorporating JGW powders were evaluated in terms of the setting time, rheological behaviors, hydration products, pore structures, and compressive strength. The results showed that JGW powder had cementitious properties and could enhance the hydration rate and degree of cement clinker phases. The specimens with up to 20% JGW exhibited similar rheological properties, pore structures, and compressive strength to the control specimen. The embodied energy and CO2 emissions of the cement mortar decreased linearly with the increasing JGW dosage, supporting the use of JGW to develop greener cement-based materials.



中文翻译:

回收地面喷射灌浆废料作为补充胶凝材料

喷射灌浆废物 (JGW) 是一种水泥-土壤混合物,是土壤固结活动产生的重要固体废物流。目前在垃圾填埋场处置 JGW 在土地空间有限的国家造成了严重的环境问题。在这项研究中,JGW 未经进一步特殊处理就被研磨成粉末,然后用作胶凝材料。从凝结时间、流变行为、水化产物、孔隙结构和抗压强度等方面评估掺入 JGW 粉末的水泥基材料的性能。结果表明,JGW粉具有胶凝性能,可以提高水泥熟料相的水化速度和程度。JGW 高达 20% 的样品表现出与对照样品相似的流变学特性、孔隙结构和抗压强度。随着 JGW 用量的增加,水泥砂浆的2排放量呈线性下降,支持使用 JGW 开发更环保的水泥基材料。

更新日期:2023-04-09
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