摘要
基于水泥科学发展以及实验室合成方法多样化,介绍了水化硅酸钙(C-S-H)的主要合成方法,包括沉淀法、溶胶凝胶法、水热合成法等。根据Gibbs自由能最小化原理可以对不同的实验体系进行水化产物的模拟计算。结果表明:在CaCl2-Si(OH)4-NaOH溶液体系中,随着初始Ca/Si比的增加,合成的C-S-H的Ca/Si比亦增加;在白水泥-石灰石体系中,石灰石的加入使单硫型硫铝酸钙逐渐为单碳型碳铝酸钙替代,抑制了钙矾石向单硫型硫铝酸钙的转化,使钙矾石稳定存在。计算结果与实验结果基本一致,热力学计算可以应用于水化产物的分析。
Based on the development of cement science and diversification of synthesis,it is introduced that the main methods of synthesis of C-S-H contain precipitation,sol-gel,and hydrothermal synthesis.According to the principle of Gibbs free energy minimization,thermodynamic calculation can simulate the hydration products in different systems.Calculation results indicate as follows： the mole ratio of Ca/Si of synthesized C-S-H increases as the initial mole ratio of Ca/Si increases in CaCl2-Si（OH）4-NaOH solution system;with the addition of calcite in the white cement-calcite system,monosulfoaluminate is replaced by monocarboaluminate,which inhibits the conversion from AFt to monosulfoaluminate and stabilizes AFt.Thermodynamic calculation can be used in analysis of hydration products.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2013年第5期903-907,912,共6页
Bulletin of the Chinese Ceramic Society
基金
国家高新技术研究发展计划(863计划)(2012AA062405)
关键词
水化硅酸钙
沉淀法
水热合成法
热力学计算
C-S-H
precipitation
hydrothermal synthesis
thermodynamic calculation
