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首页> 美国卫生研究院文献>Materials >Influence of Micro-Pore Connectivity and Micro-Fractures on Calcium Leaching of Cement Pastes—A Coupled Simulation Approach
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Influence of Micro-Pore Connectivity and Micro-Fractures on Calcium Leaching of Cement Pastes—A Coupled Simulation Approach

机译：微孔连通性和微裂纹对水泥浆中钙浸出的影响-耦合模拟方法

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A coupled numerical approach is used to evaluate the influence of pore connectivity and microcracks on leaching kinetics in fully saturated cement paste. The unique advantage of the numerical model is the ability to construct and evaluate a material with controlled properties, which is very difficult under experimental conditions. Our analysis is based on two virtual microstructures, which are different in terms of pore connectivity but the same in terms of porosity and the amount of solid phases. Numerical fracturing was performed on these microstructures. The non-fractured and fractured microstructures were both subjected to chemical leaching. Results show that despite very different material physical properties, for example, pore connectivity and effective diffusivity, the leaching kinetics remain the same as long as the amount of soluble phases, i.e., buffering capacity, is the same. The leaching kinetics also remains the same in the presence of microcracks.
机译：耦合数值方法用于评估孔隙连通性和微裂纹对完全饱和水泥浆浸出动力学的影响。数值模型的独特优势在于能够构建和评估具有受控特性的材料，这在实验条件下非常困难。我们的分析基于两个虚拟的微观结构，它们在孔隙连通性方面不同，但在孔隙率和固相量方面却相同。在这些微结构上进行了数值断裂。未破裂和破裂的微结构都经过化学浸出。结果表明，尽管材料物理性质非常不同，例如，孔连通性和有效扩散率，但只要可溶相的量即缓冲能力相同，浸出动力学就保持不变。在存在微裂纹的情况下，浸出动力学也保持不变。

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