水泥基材料孔隙结构对水分传输影响机制的研究

Research on the mechanism of pore structure on water transportation in cement-based materials.

作者信息

Hao Enze, Li Yuhang, Zhang Dali, Zhu Wenbang, Liu Ruiming, Wang Xinjie, Cao Yali, Gu Yali, Zheng Xiumei

机构信息

College of Civil Engineering, Kashi University, Kashi, Xinjiang Uygur Autonomous Region, China.

Xinjiang Key Laboratory of Engineering Materials and Structural Safety, Kashi, Xinjiang Uygur Autonomous Region, China.

出版信息

PLoS One. 2025 Jul 11;20(7):e0327659. doi: 10.1371/journal.pone.0327659. eCollection 2025.

DOI:10.1371/journal.pone.0327659

PMID:40644502

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12250452/

Abstract

To explore the mechanism of water transport in cement-based materials with different water-cement ratios under the influence of pore structure, three types of specimens with different water-cement ratios, namely paste, mortar and concrete, were fabricated. The capillary water absorption and isothermal adsorption-desorption water transport characteristic values of the three types of cement-based materials were studied, and the pore changes and porosity were analyzed. The test results show that for the cement-based materials with the same water-cement ratio, the water absorption and water absorption rate of the paste are greater than those of the mortar and concrete, and the porosity of the paste is greater than that of the concrete and mortar. Based on Darcy's law, a water transport model based on different porosity parameters was established. The results show that the water transport speed of the paste is greater than that of the mortar and concrete, which is in good agreement with the experimental results.

摘要

为探究孔隙结构影响下不同水灰比水泥基材料中水传输的机理，制备了三种不同水灰比的试件，即净浆、砂浆和混凝土。研究了这三种水泥基材料的毛细吸水及等温吸附 - 解吸水传输特征值，并分析了孔隙变化和孔隙率。试验结果表明，对于相同水灰比的水泥基材料，净浆的吸水量和吸水速率大于砂浆和混凝土，且净浆的孔隙率大于混凝土和砂浆。基于达西定律，建立了基于不同孔隙率参数的水传输模型。结果表明，净浆的水传输速度大于砂浆和混凝土，与试验结果吻合良好。