| 钟 煜,曾 荣,陶从喜,劳里林,吴有武,韦怀珺.硫硅酸钙对普通硅酸盐水泥水化性能
影响的热力学模拟[J].水泥工程,2025,38(5):25-33 |
| 硫硅酸钙对普通硅酸盐水泥水化性能
影响的热力学模拟 |
| Thermodynamic simulation of the effect of calcium sulfosilicate on the hydration properties of ordinary portland cement |
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| DOI： |
| 中文关键词: 低碳水泥 硫硅酸钙 热力学模拟 水泥化学 |
| 英文关键词: low-carbon cement calcium sulfoaluminate thermodynamic simulation cement chemistry |
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| 中文摘要: |
| 对于研究新型水泥，在开展实验之前，利用热力学模拟对该体系进行初步了解和预判，可对实验设计起到至关重要的作用。本文利用GEMS模拟了硫硅酸钙对普通硅酸盐水泥水化性能的影响，热力学计算和实验表明: 普通硅酸钙水泥水化一般不会产生铝相，只有掺入一定量的高铝混合材才能水化产生铝相，硫硅酸钙的活性需要在铝相环境下才能激发出来，因此，在普通硅酸盐水泥中引入硫硅酸钙需提前掺入大量的高铝混合材才能充分激发其活性。硫硅酸钙会改变普通硅酸盐水泥水化产物的组成和微观结构，其水化生成的产物与普通硅酸盐水泥主要矿物水化产物有所不同，能形成一些特殊的凝胶相和结晶相，改善水泥石的孔结构，使孔径细化，提高水泥石的密实度和耐久性。利用GEMS热力学计算可以提前预测水泥水化产物及其含量并进一步预测其物理性能，根据预测结果可合理设计验证配比，从而大大减轻试验工作量。 |
| 英文摘要: |
| For the study of new cement, preliminary understanding and prediction of the system through thermodynamic simulation before conducting experiments can play a crucial role in experimental design. This article uses GEMS to simulate the effect of calcium sulfosilicate on the hydration performance of ordinary Portland cement. Through thermodynamic calculations and experiments, it is shown that ordinary calcium silicate cement generally does not produce aluminum phase during hydration. Only by adding a certain amount of high aluminum admixture can aluminum phase be produced during hydration. The activity of calcium sulfosilicate can only be stimulated in the aluminum phase environment. Therefore, introducing calcium sulfosilicate into ordinary Portland cement requires adding a large amount of high aluminum admixture in advance to fully stimulate its activity. Calcium thiosilicate will change the composition and microstructure of ordinary Portland cement hydration products. The hydration products are different from the main mineral hydration products of ordinary Portland cement. It can form some special gel phase and crystalline phase, improve the pore structure of cement stone, refine the pore size, and improve the compactness and durability of cement stone. By using GEMS thermodynamic calculations, cement hydration products and their contents can be predicted in advance, and their physical properties can be further predicted. Based on the predicted results, reasonable design and verification ratios can be designed, greatly reducing the workload of experiments. |
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