Anti-cracking Performance of New Cementitious Material System
SONG Shaomin1, WANG Yujie1, LI Tongbin2
1 Beijing Future Urban Design Center, Beijing University of Civil Engineering and Architecture, Beijing 100044, China 2 Foshan City Huijiang Concrete Co. Ltd, Foshan 528200, China
Abstract: Structural cracking is a common problem that has always plagued modern concrete engineering. There are many factors affecting concrete cracking and the “three highs” of cement, namely high C3S content, high C3A content and high fineness is the main reason. In this paper, a new type of low-carbon cementitious material system was formulated by reducing the proportion of cement clinker in cementitious materials, using coarsely ground cement clinker and increasing the proportion of mineral admixtures in cementitious materials. Compared with the cementitious material system commonly used in the current mixing plant, apply the self-developed “square and round anti-crack mold” to study the crack resistance of the two cementitious material systems, and combine the heat of hydration for further analysis. The research shows that the crack resistance of the new type of low-carbon cementitious material system is significantly better than that of the current cementitious material system commonly used in the mixing plant. The heat of hydration heat is lower than that of the commonly used cementing material system in the mixing plant. Adding a certain amount of steel slag and expansion agent can significantly improve the crack resistance of low carbon cementitious mate-rials, and low SO3 content will increase the cracking sensitivity of low carbon cementitious materials.
宋少民, 王宇杰, 李统彬. 新型胶凝材料体系的抗裂性能[J]. 材料导报, 2021, 35(Z1): 206-210.
SONG Shaomin, WANG Yujie, LI Tongbin. Anti-cracking Performance of New Cementitious Material System. Materials Reports, 2021, 35(Z1): 206-210.
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2021, Vol. 35 
