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首页> 外文期刊>Magazine of Concrete Research >Modelling shrinkage of concrete from moisture lost using moisture diffusion theory
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Modelling shrinkage of concrete from moisture lost using moisture diffusion theory

机译:利用水分扩散理论对水分损失造成的混凝土收缩进行建模

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摘要

This paper proposes a model to predict the shrinkage of concrete based on the moisture lost from the concrete in the process of drying. The drying of concrete causes the decrease in relative humidity within concrete, which is usually considered responsible for the shrinkage of concrete. The fall in relative humidity was correlated to the moisture lost according to diffusion theory. Incorporating existing relative humidity-shrinkage relationships, the shrinkage of concrete was then modelled as a function of the moisture lost. The predicted shrinkage was compared with the experimentally measured results and good agreement was achieved. The paper also illustrates that the model can represent non-uniform shrinkage and the effect of specimen size on shrinkage. However, further development of the model is required to accommodate the influence of aggregate and changes in environmental conditions.
机译:本文提出了一个模型,该模型根据混凝土在干燥过程中损失的水分来预测混凝土的收缩率。混凝土的干燥导致混凝土内的相对湿度降低,这通常被认为是造成混凝土收缩的原因。根据扩散理论,相对湿度的下降与水分流失有关。结合现有的相对湿度-收缩率关系,然后将混凝土的收缩率建模为水分损失的函数。将预测的收缩率与实验测量的结果进行比较,并取得了良好的一致性。本文还说明了该模型可以表示不均匀的收缩率以及试样尺寸对收缩率的影响。但是,需要对模型进行进一步开发以适应聚合的影响和环境条件的变化。

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