Cao Mingli, Ming Xing, He Kaiyu, Li Li, Shen Shirley
School of Civil Engineering, Dalian University of Technology, Dalian 116024, China.
Henan Institute of Metrology, No. 21, Huayuan Road, Zhengzhou 450008, China.
Materials (Basel). 2019 Mar 7;12(5):781. doi: 10.3390/ma12050781.
Calcium carbonate is wildly used in cementitious composites at different scales and can affect the properties of cementitious composites through physical effects (such as the filler effect, dilution effect and nucleation effect) and chemical effects. The effects of macro (>1 mm)-, micro (1 μm⁻1 mm)- and nano (<1 μm)-sizes of calcium carbonate on the hydration process, workability, mechanical properties and durability are reviewed. Macro-calcium carbonate mainly acts as an inert filler and can be involved in building the skeletons of hardened cementitious composites to provide part of the strength. Micro-calcium carbonate not only fills the voids between cement grains, but also accelerates the hydration process and affects the workability, mechanical properties and durability through the dilution, nucleation and even chemical effects. Nano-calcium carbonate also has both physical and chemical effects on the properties of cementitious composites, and these effects behave even more effectively than those of micro-calcium carbonate. However, agglomeration of nano-calcium carbonate reduces its enhancement effects remarkably.
碳酸钙在不同尺度的胶凝复合材料中被广泛应用，并且可以通过物理效应（如填充效应、稀释效应和成核效应）和化学效应来影响胶凝复合材料的性能。本文综述了宏观尺寸（>1mm）、微观尺寸（1μm⁻1mm）和纳米尺寸（<1μm）的碳酸钙对水化过程、工作性、力学性能和耐久性的影响。宏观碳酸钙主要作为惰性填料，可参与构建硬化胶凝复合材料的骨架以提供部分强度。微观碳酸钙不仅填充水泥颗粒之间的空隙，还能加速水化过程，并通过稀释、成核甚至化学效应影响工作性、力学性能和耐久性。纳米碳酸钙对胶凝复合材料的性能也具有物理和化学效应，且这些效应比微观碳酸钙的效应表现得更为显著。然而，纳米碳酸钙的团聚显著降低了其增强效果。
