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通过对水泥力学性能、水化速率和水泥硬化浆体孔结构的测定,结合XRD、SEM分析,研究了矿渣对阿利特-硫铝酸钡钙水泥水化硬化过程的影响。研究结果表明:掺入矿渣后,水泥的早期强度下降幅度较大,但后期强度下降幅度较小。在试验掺量范围内,当矿渣掺量为20%时,该水泥各龄期抗压强度下降幅度最小,其后期抗压强度接近纯熟料水泥;加入矿渣后,水泥水化热明显降低,矿渣在受到碱激发与硫铝酸盐双重激发作用下发生二次水化反应,使水泥水化速率有一定增加而出现第三个放热峰;矿渣二次水化反应有效地改善了硬化水泥浆体的孔结构,使水泥后期强度逐渐增加。
The influence of slag on the hydration-hardening process of alite-barium calcium sulphoaluminate cement was studied by measuring the mechanical properties of cement, hydration rate and pore structure of hardened cement paste, combined with XRD and SEM analysis. The results show that: the incorporation of slag, the early strength of cement decreased significantly, but the late strength decreased less. When the content of slag is 20%, the compressive strength decreases little by age and the compressive strength at the later stage is close to that of pure clinker cement. After the slag is added, the hydration heat of cement decreases obviously, The second hydration reaction takes place under the dual excitation of alkali and sulphoaluminate, which makes the hydration rate of cement increase slightly and the third exothermic peak appears. The secondary hydration reaction of slag effectively improves the mechanical properties of hardened cement slurry Body pore structure, so that the late strength of cement gradually increased.