【摘要】 以分析纯物料制备硫硅酸钙（C₅S₂$）矿物,通过XRD、f-CaO分析不同煅烧温度对C₅S₂$矿物合成的影响,Rietveld精修计算C₅S₂$矿物的合成率,SEM观测其形貌。将合成的C₅S₂$矿物按不同比例掺入硫铝酸盐水泥中,通过测定抗压强度及水化试样结合水含量来研究C₅S₂$矿物对硫铝酸盐水泥力学性能及水化速率的影响。研究表明:C₅S₂$矿物的最佳煅烧温度为1 150℃,合成率可达到94.9%,C₅S₂$晶体形貌为圆棒状。当C₅S₂$掺量在7.5%～10%时,水泥强度明显提高;当C₅S₂$掺量为10%时,水泥28 d强度可达到73.3 MPa。掺入适量C₅S₂$可以提高硫铝酸盐水泥的水化速率,当C₅S₂$掺量为10%时,水泥28 d结合水量达到27.48%,水化速率最高。更多还原

【Abstract】 Calcium silicate（C₅S₂$）mineral was prepared from pure materials, and the influence of different calcination systems on the synthesis of C₅S₂$ mineral was investigated by f-CaO determination and XRD analysis. The synthetic C₅S₂$mineral was mixed into sulfoaluminate cement in different proportions. The influence of C₅S₂$ mineral on the mechanical properties and hydration rate of sulfoaluminate cement was studied by measuring the compressive strength and the combined water content of hydrated samples. The results show that: after hydrothermal synthesis of raw materials and calcination at 1 150 ℃, the mineral synthesis rate of C₅S₂$ could reach 94.9%, and the crystal morphology of C₅S₂$ is like a round rod. When the content of C₅S₂$ is 7.5%—10%, the strength of cement test block increases obviously. When the content is 10%, the 28 d strength of cement test block can reach 73.3 MPa. Adding C₅S₂$ can improve the hydration rate of sulphoaluminate cement. When the content is 10%, the combined water amount of 28 d cement reaches 27.48%, with the highest hydration rate.更多还原