福州大学学报（自然科学版）2025，Vol.53Issue(2)：185-192,8.DOI:10.7631/issn.1000-2243.24083
再生骨料自密实混凝土受压徐变及预测模型
Compression creep and prediction model of recycled aggregate self compacting concrete
摘要
Abstract
In order to study the influence of different recycled aggregate replacement rates on the creep performance of self-compacting concrete,the experimental study on the compressive creep performance of recycled aggregate self-compacting concrete was carried out.The results show that with the increase of recycled aggregate replacement rate,the compressive strength and elastic modulus of concrete decrease gradually.Under the replacement rate of 50%,70%and 100%,the 28 d total compressive creep degree of concrete degree increased by 8.48%,27.63%and 36.15%respectively,and the 120 d total compressive creep increased by 0.12%,17.38%and 34.71%respectively.The pore structure and microstructure show that the incorporation of recycled aggregate increases the fine cracks and harmful holes in the microstructure of concrete,which leads to the decrease of macro performance.The replacement rate of recycled aggregate is introduced as the correction coefficient,and the residual percentage between the predicted value of the model and the experimental value is within 9%.The proposed prediction model of compressive creep of recycled aggregate self-compacting concrete has good accuracy.关键词
再生骨料/自密实混凝土/取代率/受压徐变/微观结构Key words
recycled aggregate/self compact concrete/replacement rate/compression creep/micro-structure分类
建筑与水利引用本文复制引用
江宇舟,罗素蓉,黄欢,郑铭棋..再生骨料自密实混凝土受压徐变及预测模型[J].福州大学学报（自然科学版）,2025,53(2):185-192,8.基金项目
国家自然科学基金资助项目(52078139) （52078139）
