This paper studies the effect of clinkering temperature and duration on the production, phase evolution and microstructure of low energy Belite Calcium-Sulpho-Aluminate (BCSA) clinkers. The mineralogy and microstructure of BCSA clinker, produced in the temperature range of 1270–1340 °C and clinkering duration periods of 20, 30 and 60 min, were studied by XRD/QXRD and SEM/EDS. In all clinkering conditions belite was detected in both α_H′- and β-polymorphs while ye'elimite was mainly formed in the orthorhombic phase, accompanied by small amounts of cubic polymorph. Extensive formation of perovskite was also detected. It was shown that elevated concentrations of Ti and S affect belite's polymorphism; at low clinkering conditions their incorporation in the belite crystal led to the stabilization of α_H′-polymorph, while at elevated temperatures their partial release from belite crystals favours the stabilization of β-polymorph. The results highlight the importance of experimental simulation in combination with theoretical clinker design.

本文研究了熟料温度和持续时间对低能贝利特硫铝酸钙 (BCSA) 熟料的生产、相演化和微观结构的影响。通过 XRD/QXRD 和 SEM/EDS 研究了 BCSA 熟料的矿物学和微观结构，在 1270-1340 °C 的温度范围内生产，熟料持续时间为 20、30 和 60 分钟。在所有熟料条件下，α _H '-和β-多晶型物均检测到belite，而ye'elimite 主要在斜方晶相中形成，伴有少量立方晶型。还检测到钙钛矿的广泛形成。结果表明，Ti 和 S 浓度升高会影响贝利特的多晶型；在低熟料条件下，它们掺入贝利特晶体导致 α _H稳定'-多晶型物，而在升高的温度下，它们从贝利特晶体中部分释放有利于 β-多晶型物的稳定化。结果突出了实验模拟与理论熟料设计相结合的重要性。