摘要
水泥基材料孔溶液的碱度对于材料的耐久性能和硬化过程十分重要。建立了一个水泥基材料孔溶液碱度的计算机模拟方法,它基于一个三维的水泥基材料水化过程和微观结构发展的计算机模型,结合C-S-H凝胶碱吸附理论,综合考虑环境温度、湿度、材料配合比等因素,模拟孔溶液中碱金属离子浓度变化的规律,并与实际试验结果进行了对比。模拟和对比结果表明:提出的模拟方法可以成功地预测水泥基材料孔溶液碱度的变化规律,为实际材料碱度控制提供可靠的理论支持和事前控制建议,并为材料长期耐久性能评价提供一定依据。
A computer model was established in this study,which is based on a three-dimensional computer model for the hydration and microstructure development of cement paste.The model uses the newly proposed method for determining the alkali binding capacity of C-S-H in cement paste.It is able to take into account the recipe of the material and the curing environment, and model the change of alkali concentrations in the pore solution in both short and long terms.The model predictions are compared to measurements reported in different literatures.The results showed that the newly established model is able to predict the evolution of alkali concentrations in the pore solution successfully.
出处
《混凝土》
CAS
CSCD
北大核心
2008年第6期16-20,共5页
Concrete
基金
“973”前期研究课题(2006CB708608)
关键词
水泥基材料
孔溶液
碱度
计算机模拟
吸附
cement-based materials
pore solution
alkalinity
computer modeling
binding
