论文部分内容阅读
普通硅酸盐水泥(OPC)混凝土的耐久性已经历了一个世纪的试验验证和基础性研究,对一些破坏过程(如冻融)已有了较为深入的了解,但对多数破坏过程还只是泛泛的了解。在已有研究的基础上,通过试验,建立可行的模型,揭示材料的物理性质(如:扩散系数、结晶速率、化学势)可以加快研究的进程。这种方法对于新型水泥基材料的研究和开发尤为重要。新型水泥基材料的长期性能不能直接用OPC的经验模型,要用基于成熟的机理和可测量的物理性能来预测。OPC研究已经揭示了控制新型水泥基材料性能的参数,同时参考全面的数值模拟分析方法能够描述材料的真实行为。建立基于实验测试其性能的模型有利于研究和开发新型水泥基材料。本文综述了几种破坏类型(冻融、盐结晶,锈蚀)的模型及所需量化的性能参数。
Ordinary portland cement (OPC) durability of concrete has gone through a century of experimental verification and basic research on some of the destruction process (such as freeze-thaw) have been more in-depth understanding, but the majority of the destruction process is only a general Understand. Based on the existing research, the feasibility of the model is established experimentally to reveal the physical properties of the material (eg, diffusion coefficient, crystallization rate and chemical potential) to speed up the research process. This method is particularly important for the research and development of new cement-based materials. Long-term performance of new cement-based materials can not be directly empirical model of OPC, based on the use of mature mechanisms and measurable physical properties to predict. OPC research has revealed the parameters that control the performance of new cement-based materials, and can describe the true behavior of materials with reference to comprehensive numerical simulation methods. The establishment of a model based on experimental testing of its performance is conducive to the research and development of new cement-based materials. This paper reviews several models of damage types (freeze-thaw, salt crystallization, rusting) and the required quantitative performance parameters.