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以硫铝酸盐水泥的主要矿物的硫铝酸钙(C4A3)为基础,用Sr2+对C4A3中的Ca2+进行取代,合成了新的水泥矿物——硫铝酸锶钙系列,研究了该系列矿物试样煅烧后的强度发展规律。结果表明:硫铝酸锶钙系列矿物试样经1300℃煅烧后的抗压强度明显高于硫铝酸钙,抗压强度最大的矿物组成为Ca1.50Sr2.50A3,其3d和28d抗压强度分别为76.6MPa和89.6MPa,用X射线衍射仪、扫描电子显微镜和差热分析仪等对熟料的形成和水化机理进行了初步分析,发现硫铝酸锶钙矿物水化产物主要是钙钒石(AFt),水化铝酸一钙(CAH10),Ca(OH)2以及Al2O3(aq)。
Based on C4A3, the main mineral of sulphoaluminate cement, Ca2 + in C4A3 was substituted by Sr2 + to synthesize a series of new cement minerals, strontium calcium strontium aluminate, Series of mineral samples calcined after the intensity of development. The results show that the compressive strength of calcined strontium calcium aluminate mineral samples after calcination at 1300 ℃ is significantly higher than that of calcium sulfoaluminate, and the mineral with the highest compressive strength is Ca1.50Sr2.50A3, the compressive strength at 3d and 28d The strength of which was 76.6MPa and 89.6MPa respectively. The formation and hydration mechanism of clinker were analyzed by X-ray diffraction, scanning electron microscopy and differential thermal analyzer. It was found that the hydration products of strontium calcium aluminate aluminate mainly (AFt), hydrated monoaluminate (CAH10), Ca (OH) 2 and Al2O3 (aq).