Resources, Conservation and Recycling ( IF 13.2 ) Pub Date : 2022-08-23 , DOI: 10.1016/j.resconrec.2022.106597 Yuelin Li, Samuel Eyley, Wim Thielemans, Qiang Yuan, Jiabin Li
This study examined the potential of recycling deep soil mixing residue (DSMR), a cement-soil waste, as a partial Portland cement substitute. The chemical and mineral compositions of DSMR before and after calcination were determined. For the calcined DSMR blended cement pastes, the compressive strength and phase assemblage (characterized using TGA and XRD) were evaluated. Results revealed pozzolanic and hydraulic properties of the calcined DSMR, due to the formation of reactive calcium-rich glassy phases and hydraulic C2S. The calcined DSMR can contribute to the strength development of cement because of the pozzolanic reactions and the formation of additional hydrates. With up to 20% calcined DSMR, negligible side-effect on the strength of the blended cement paste was noticed. The compressive strength development of the blended cement pastes was linearly correlated to the reactive phase content in the calcined DSMR. This work demonstrated the potential of using DSMR to develop greener composite cement.
中文翻译:
水泥基材料中深层土壤拌合残渣的价值
本研究探讨了回收深层土壤混合残渣 (DSMR)(一种水泥-土壤废物)作为部分波特兰水泥替代品的潜力。测定了煅烧前后 DSMR 的化学和矿物成分。对于煅烧的 DSMR 混合水泥浆体,评估了抗压强度和相组合(使用 TGA和 XRD 表征)。结果揭示了煅烧 DSMR 的火山灰和水硬性质,这是由于形成反应性富钙玻璃相和水硬 C 2S. 由于火山灰反应和额外水合物的形成,煅烧的 DSMR 有助于水泥的强度发展。对于高达 20% 的煅烧 DSMR,注意到对混合水泥浆强度的副作用可以忽略不计。混合水泥浆体的抗压强度发展与煅烧 DSMR 中的反应相含量呈线性相关。这项工作证明了使用 DSMR 开发更环保的复合水泥的潜力。