Conventional alkali-activated slag materials apply strong industrial alkalis with high cost and potential corrosion risk. Alternatively, this study utilized industrial solid waste phosphogypsum, soda residue, and calcium carbide slag to construct a salt-alkali synergistic activated system. A new salt-alkali synergistic activation effect was formed by the SO42− introduced by PG together with the Cl− and OH− provided by SR and CS, which promoted the hydration reaction. AFt, Friedel's salt, C-(A)-S-H, and other hydration products were generated and congregated, and a new all-solid-waste binder was created with 3d/28d strengths of 17.9/43.9 MPa, meeting the P·O 42.5 cement strength standard requirements. By conducting compressive strength and drying shrinkage tests on mortar and paste specimens with varying ratios, and employing XRD, TG-DTG, FTIR, and SEM-EDS analyses, the mechanical attributes of the binder were systematically assessed, and its hydration process was elucidated.

中文翻译：

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以磷石膏、纯碱渣和电石渣为原料，采用盐碱协同活化体系制备的新型全固废粘结剂


传统的碱活化渣材料使用强工业碱，成本高，有潜在的腐蚀风险。或者，本研究利用工业固体废弃物磷石膏、纯碱渣和电石渣构建盐碱协同活化系统。PG 引入的 SO42− 与 SR 和 CS 提供的 Cl− 和 OH− 形成新的盐碱协同活化效应，促进了水合反应。生成并聚集了 AFt、Friedel 盐、C-（A）-S-H 和其他水化产物，并创造了一种新的全固体废物粘结剂，其 3d/28d 强度为 17.9/43.9 MPa，满足 P·O 42.5 水泥强度标准要求。通过对不同比例的砂浆和浆料试样进行抗压强度和干燥收缩试验，并采用 XRD、TG-DTG、FTIR 和 SEM-EDS 分析，系统评估了粘合剂的机械属性，并阐明了其水化过程。