The present study investigated the effect of CaO incorporation on the microstructure and autogenous shrinkage of ternary blend Portland cement-slag-silica fume. Samples having water-to-binder ratio of 0.25 with varying CaO dosages were prepared, and their properties were explored through compressive strength test, MIP, XRD, SEM, TGA and autogenous shrinkage. The results indicated that the incorporated CaO promoted the reaction of binder materials, thereby enhancing early compressive strength. Furthermore, the volumetric change occurring in the hydration of incorporated CaO compensated for early age autogenous shrinkage during formation of the internal rigid skeleton, showing significant reduction in shrinkage movement in the final stage. Meanwhile, the microstructure and corresponding compressive strength of the samples were significantly affected by the steam curing condition due to the excessive volumetric expansion of the matrix by the CaO incorporation.

本研究研究了CaO掺入对三元混合硅酸盐水泥-矿渣-硅粉的微观结构和自发收缩的影响。制备了CaO用量不同时水胶比为0.25的样品，并通过抗压强度测试，MIP，XRD，SEM，TGA和自生收缩来探索其性能。结果表明，掺入的CaO促进了粘合剂材料的反应，从而增强了早期抗压强度。此外，在掺入CaO的水合过程中发生的体积变化补偿了内部刚性骨架形成过程中的早期自发收缩，从而表明在最后阶段收缩运动显着减少。与此同时，