风积沙PVA-FRCC早期收缩性能及配合比研究

doi:10.16552/j.cnki.issn1001-1625.2024.1165

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (5): 1666-1675.DOI: 10.16552/j.cnki.issn1001-1625.2024.1165

风积沙PVA-FRCC早期收缩性能及配合比研究

王玉清¹, 姚浥芯¹, 云泽亚¹, 蔡思远¹, 刘曙光²

1.内蒙古工业大学土木工程学院,呼和浩特 010051;
2.内蒙古工业大学资源与环境工程学院,呼和浩特 010051

收稿日期:2024-09-30 修订日期:2024-12-01 发布日期:2025-05-20
通信作者: 云泽亚,硕士研究生。E-mail:954551249@qq.com
作者简介:王玉清(1972—),女,教授。主要从事复合材料的工程应用及工程防灾减灾研究。E-mail:imutwyq@126.com
基金资助:
内蒙古自治区自然科学基金(2023LHMS05016);国家自然科学基金(52468039,51968056);内蒙古自治区科技计划项目(2022YFHH0153);内蒙古自治区直属高校基本科研业务费项目(JY20240076)

Early Shrinkage Characteristics and Mix Ratio of Aeolian Sand PVA-FRCC

WANG Yuqing¹, YAO Yixin¹, YUN Zeya¹, CAI Siyuan¹, LIU Shuguang²

1. College of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;
2. College of Resources and Environmental Engineering, Inner Mongolia University of Technology, Hohhot 010051, China

Received:2024-09-30 Revised:2024-12-01 Online:2025-05-20

摘要/Abstract

摘要： 以风积沙取代率、水胶比、纤维体积率及砂胶比为研究变量,通过14组风积沙聚乙烯醇(PVA)纤维水泥基复合材料(PVA-FRCC)的收缩试验,对风积沙PVA-FRCC试件的早期收缩性能进行研究,研究表明:随风积沙取代率、水胶比、砂胶比提高,风积沙PVA-FRCC收缩增大,掺入纤维后基材收缩减小,但纤维体积率的进一步增大对减小收缩的效果不明显。以收缩应变、抗压强度、极限拉应变、流动度为指标,采用综合评价法对风积沙PVA-FRCC性能进行综合评价,按照一般工程、高流动度、低收缩及高韧性分类,提出满足不同工程应用需求的较优配合比。最后对CEB-FIP模型进行修正,提出了考虑多种因素影响的风积沙PVA-FRCC早期收缩估算模型,模型计算值与试验值吻合度较高,因此,该模型可用于风积沙PVA-FRCC早期收缩估算和收缩开裂风险预测。

关键词: 风积沙, PVA纤维, 纤维水泥基复合材料, 收缩性能, 综合评价, 收缩估算模型

Abstract: Taking the replacement rate of aeolian sand, water-binder ratio, fiber volume ratio and sand-binder ratio as the research variables, the early shrinkage performance of aeolian sand polyvinyl alcohol fiber reinforced cementitious composite (PVA-FRCC) specimens was studied through the shrinkage test of 14 groups of aeolian sand PVA-FRCC specimens. The results show that with the increase of the replacement rate of aeolian sand, water-binder ratio and sand-binder ratio, the shrinkage of aeolian sand PVA-FRCC increases, and the shrinkage of the substrate decreases after the incorporation of fibers, but the further increase of the fiber volume ratio has no obvious effect on reducing the shrinkage. Taking shrinkage strain, compressive strength, ultimate tensile strain and fluidity as indexes, the comprehensive evaluation method was used to comprehensively evaluate the performance of PVA-FRCC of aeolian sand. According to the classification of general engineering, high fluidity, low shrinkage and high toughness, the better mix ratio to meet the needs of different engineering applications was proposed. Finally, the CEB-FIP model is modified, and an early shrinkage estimation model of PVA-FRCC for aeolian sand considering the influence of various factors is proposed. The calculated values of the model are in good agreement with the experimental values, which can be used for early shrinkage estimation and shrinkage cracking risk prediction of PVA-FRCC for aeolian sand.

Key words: aeolian sand, PVA fiber, fiber reinforced cementitious composite, shrinkage performance, comprehensive assessment, shrinkage estimation model

中图分类号:

TU528.58

王玉清, 姚浥芯, 云泽亚, 蔡思远, 刘曙光. 风积沙PVA-FRCC早期收缩性能及配合比研究[J]. 硅酸盐通报, 2025, 44(5): 1666-1675.

WANG Yuqing, YAO Yixin, YUN Zeya, CAI Siyuan, LIU Shuguang. Early Shrinkage Characteristics and Mix Ratio of Aeolian Sand PVA-FRCC[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(5): 1666-1675.

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风积沙PVA-FRCC早期收缩性能及配合比研究

Early Shrinkage Characteristics and Mix Ratio of Aeolian Sand PVA-FRCC

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