硅酸盐通报2025，Vol.44Issue(5)：1666-1675,1702,11.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
Early Shrinkage Characteristics and Mix Ratio of Aeolian Sand PVA-FRCC
摘要
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.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Key words
aeolian sand/PVA fiber/fiber reinforced cementitious composite/shrinkage performance/comprehensive assessment/shrinkage estimation model分类
建筑与水利引用本文复制引用
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):1666-1675,1702,11.基金项目
内蒙古自治区自然科学基金(2023LHMS05016) （2023LHMS05016）
国家自然科学基金(52468039,51968056) （52468039,51968056）
内蒙古自治区科技计划项目(2022YFHH0153) （2022YFHH0153）
内蒙古自治区直属高校基本科研业务费项目(JY20240076) （JY20240076）
