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<p>To study the effects of fine-aggregates on the drying-shrinkage properties of concrete, two types of manufactured-sand and one type of natural sand (excluding &lt;75 µm particles) were selected for tests, and nine sets of concrete drying shrinkage tests were designed with three strength grade (C30, C40, and C50) as variables. By observing the drying-shrinkage deformation of the specimens over 360 days, the effects of fine-aggregate properties on the drying shrinkage properties of concrete of different strength grades were analyzed and a prediction model was developed. Compared with natural sand concrete, the development of drying shrinkage of manufactured-sand concrete exhibits the phenomenon of advancement. The apparent density of the fine-aggregate and the strength grade are the two main factors affecting the limit value of the drying shrinkage of concrete. With a reduction in the water absorption or apparent density of the fine-aggregate or the strength grade of concrete prepared using the same fine-aggregate, the prediction accuracy of the existing models decreases. According to the GL 2000 model, two coefficients-and-were introduced to propose a prediction model for the drying shrinkage of fine-aggregate concrete, which is applicable to different strength grades.</p>

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Modeling Drying Shrinkage of Concrete Based on Differences in Fine-Aggregate Properties

  • 期刊论文

  • 发表日期：

    2025年11月27日

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  • Cuizhen Xue,
  • Gaixia Miao,
  • Aoxiang Zhou

摘要

To study the effects of fine-aggregates on the drying-shrinkage properties of concrete, two types of manufactured-sand and one type of natural sand (excluding <75 µm particles) were selected for tests, and nine sets of concrete drying shrinkage tests were designed with three strength grade (C30, C40, and C50) as variables. By observing the drying-shrinkage deformation of the specimens over 360 days, the effects of fine-aggregate properties on the drying shrinkage properties of concrete of different strength grades were analyzed and a prediction model was developed. Compared with natural sand concrete, the development of drying shrinkage of manufactured-sand concrete exhibits the phenomenon of advancement. The apparent density of the fine-aggregate and the strength grade are the two main factors affecting the limit value of the drying shrinkage of concrete. With a reduction in the water absorption or apparent density of the fine-aggregate or the strength grade of concrete prepared using the same fine-aggregate, the prediction accuracy of the existing models decreases. According to the GL 2000 model, two coefficients-and-were introduced to propose a prediction model for the drying shrinkage of fine-aggregate concrete, which is applicable to different strength grades.