Scale Effect of Cubic Compressive Strength for Recycled Concrete with Silica-fume Modification

被引：0
|
作者：
Su J. [1 ,2 ,3 ]
Zhu J. [1 ]
Shi C. [1 ,2 ,3 ]
Fang Z. [1 ]
机构：
[1] Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province (Hunan University), Changsha
[2] International Science Innovation Collaboration Base for Green & Advanced Civil Engineering Materials of Hunan Province (Hunan University), Changsha
[3] Key Laboratory of Building Safety and Energy Efficiency of Ministry of Education(Hunan University), Changsha
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2022年 / 49卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Cubic compressive strength; Recycled concrete; Replacement ratio; Scale effect; Silica-fume modification;
D O I：
10.16339/j.cnki.hdxbzkb.2022061
中图分类号：
学科分类号：
摘要：
In order to study the influence of the aggregate silica-fume modification on the scale effect of cubic compressive strength of recycled concrete, 240 recycled concrete cube specimens were conducted under the compression tests, taking the water-binder ratio of silica-fume paste, the recycled aggregate replacement ratio and the dimension of specimens as test parameters. The test results show that the improvement of the cubic compressive strength of recycled concrete with silica-fume modification(w/b=1.0) reaches the maximum value, while the reduction in scale effect is also the most significant. The scale effect of cubic compressive strength becomes more obvious with the increase of recycled aggregate replacement ratio, and the scale effect of recycled concrete with the recycled aggregate replacement ratio of 100% is about 1.4 times that of ordinary concrete. Silica-fume modification can reduce the scale effect of recycled concrete. When the recycled aggregate replacement ratio is 100%, the scale effect of recycled concrete with silica-fume modification is about 19.2% lower than that of recycled concrete without modification. The calculation equations of scale effect law are proposed, which can be used to analyze the cubic compressive of recycled concrete. © 2022, Editorial Department of Journal of Hunan University. All right reserved.
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页码：174 / 180
页数：6
相关论文
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