This investigation reports on the mechanisms of reaction, microstructure, hydration products, compressive strength and environmental impact of supersulfated cements based on pumice (SSC-PM), using 10–20%wt of quicklime (CaO) as the alkaline activator and 5–15%wt of sulfatic activators of anhydrite or hemihydrate; three different initial curing temperature (ICT) regimes were used for 24 h, of 20, 40 and 60 °C. The main hydration products were C–S–H and ettringite; minor phases included monosulfate, gypsum, portlandite and calcite. The ICT of 60 °C accelerated the reactions of formation of ettringite and C–S–H, improving the early strength, whereas; the higher contents CaO (20%) and An or HH (15%) slowed the hydration reactions and consequently the early strength development. The activation with CaO-Anhydrite densified the microstructure leading to 360-day strengths of up to 34 MPa. These SSC-PM represent a good sustainable alternative as these showed emissions of 159–281 kgCO₂-eq/t, which are at least 67% lower than the manufacture of clinker of Portland cement.

本研究报告了基于浮石 (SSC-PM) 的过硫酸盐水泥的反应机制、微观结构、水化产物、抗压强度和环境影响，使用 10-20%wt 的生石灰 (CaO) 作为碱性活化剂和 5-15硬石膏或半水合物的硫酸盐活化剂的％wt；三种不同的初始固化温度 (ICT) 方案用于 24 小时，分别为 20、40 和 60 °C。主要水化产物为C-S-H和钙矾石；次要相包括单硫酸盐、石膏、硅酸盐和方解石。60°C 的 ICT 加速了钙矾石和 C-S-H 的形成反应，提高了早期强度，而；较高含量的 CaO (20%) 和 An 或 HH (15%) 减缓了水合反应，从而减缓了早期强度的发展。CaO-硬石膏的活化使微观结构致密，导致 360 天强度高达 34 MPa。这些 SSC-PM 代表了一种良好的可持续替代品，因为它们的排放量为 159–281 kgCO₂ -eq/t，至少比硅酸盐水泥熟料生产低 67%。