大风干热环境中风积沙 PVA-FRCC板早期收缩开裂性能

doi:10.16552/j.cnki.issn1001-1625.2025.0173

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (9): 3207-3217.DOI: 10.16552/j.cnki.issn1001-1625.2025.0173

大风干热环境中风积沙 PVA-FRCC板早期收缩开裂性能

王玉清¹, 薛延昭¹, 云泽亚¹, 孙华钧², 刘曙光³

1.内蒙古工业大学土木工程学院,呼和浩特 010051;
2.中国化学工程第十六建设有限公司,宜昌 443000;
3.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:2025-02-19 修订日期:2025-04-09 出版日期:2025-09-15 发布日期:2025-09-19
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。主要从事高性能纤维水泥基复合材料工程应用方面的研究。E-mail:nmwyq2005@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(2022YFHH0153);内蒙古自治区直属高校基本科研业务费项目(JY20240076)

Early Shrinkage Cracking Performance of Aeolian Sand PVA-FRCC Plate in Windy and Hot-Dry Environment

WANG Yuqing¹, XUE Yanzhao¹, YUN Zeya¹, SUN Huajun², LIU Shuguang³

1. College of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;
2. China National Chemical Engineering No.16 Construction Co. Ltd., Yichang 443000, China;
3. College of Resources and Environmental Engineering, Inner Mongolia University of Technology, Hohhot 010051, China

Received:2025-02-19 Revised:2025-04-09 Published:2025-09-15 Online:2025-09-19

摘要/Abstract

摘要： 为探明西部地区大风干热环境中风积沙聚乙烯醇纤维水泥基复合材料(polyvinyl alcohol fiber reinforced cementitious composite, PVA-FRCC)板早期(7 d)约束收缩和开裂性能,从而促进风积沙的工程应用,减少天然砂石开采,本文以风积沙取代率、纤维体积率、水胶比及约束度为变量,开展了PVA-FRCC板早期收缩性能试验研究,并建立了收缩估算模型。结果表明:随着风积沙取代率和水胶比提高,约束收缩增大;掺入PVA纤维既可以减少约束收缩,也能显著提升风积沙PVA-FRCC板的阻裂能力;风积沙取代率较高且水胶比稍大时,风积沙PVA-FRCC板的阻裂等级最高,综合衡量收缩性能、力学性能、风积沙利用率及经济性等,掺入一定PVA纤维、风积沙取代率适中且水胶比较小的配合比较优;风积沙PVA-FRCC板内部湿度变化分为三个阶段,与收缩变化规律具有高度相关性,反映了收缩变化机理;通过理论分析建立了风积沙PVA-FRCC板早期约束收缩估算模型,模型计算值与试验值吻合度较高,可为风积沙PVA-FRCC板早期收缩估算及裂缝控制提供参考。

关键词: 风积沙, PVA-FRCC板, 约束收缩, 干热, 湿度, 阻裂等级, 收缩估算模型

Abstract: To explore the early-age (7 d) restrained shrinkage and cracking performance of polyvinyl alcohol fiber reinforced cementitious composite (PVA-FRCC) plate containing aeolian sand under windy and dry-hot environment in western China, and to promote the engineering application of aeolian sand, thereby reducing the exploitation of natural aggregates, this study was carried out. In this study, the early shrinkage performance of PVA-FRCC plate was studied by taking the aeolian sand replacement rate, fiber volume fraction, water-binder ratio and restrained degree as variables, and the shrinkage estimation model was established. The results show that the restrained shrinkage increases with the increase of aeolian sand replacement rate and water-binder ratio. The incorporation of PVA fiber can not only reduce the restrained shrinkage, but also significantly improve the crack resistance of aeolian sand PVA-FRCC plate. When the aeolian sand replacement rate is higher and the water-binder ratio is slightly larger, the crack resistance grade of aeolian sand PVA-FRCC plate is the highest. From the comprehensive performance of shrinkage performance, mechanical performance, aeolian sand utilization rate and economy, it is better to mix a certain amount of PVA fiber, moderate aeolian sand replacement rate and small water-binder ratio. The internal humidity change of aeolian sand PVA-FRCC plate is divided into three stages, which is highly correlated with the shrinkage change law, reflecting the shrinkage change mechanism. Through theoretical analysis, the early restrained shrinkage estimation model of aeolian sand PVA-FRCC plate is established. The calculated value of the model is in good agreement with the experimental value, which can provide reference for the early shrinkage estimation and crack control of aeolian sand PVA-FRCC plate.

Key words: aeolian sand, PVA-FRCC plate, restrained shrinkage, hot-dry, humidity, crack resistance grade, shrinkage estimation model

中图分类号:

TU528.58

王玉清, 薛延昭, 云泽亚, 孙华钧, 刘曙光. 大风干热环境中风积沙 PVA-FRCC板早期收缩开裂性能[J]. 硅酸盐通报, 2025, 44(9): 3207-3217.

WANG Yuqing, XUE Yanzhao, YUN Zeya, SUN Huajun, LIU Shuguang. Early Shrinkage Cracking Performance of Aeolian Sand PVA-FRCC Plate in Windy and Hot-Dry Environment[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(9): 3207-3217.

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大风干热环境中风积沙 PVA-FRCC板早期收缩开裂性能

Early Shrinkage Cracking Performance of Aeolian Sand PVA-FRCC Plate in Windy and Hot-Dry Environment

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