清晨好,您是今天最早来到科研通的研友!由于当前在线用户较少,发布求助请尽量完整的填写文献信息,科研通机器人24小时在线,伴您科研之路漫漫前行!

The compressive behaviour of natural and recycled aggregate concrete during and after exposure to elevated temperatures

骨料(复合) 抗压强度 材料科学 复合材料 残余物 混凝土性能 环境科学 废物管理 工程类 计算机科学 算法
作者
Prosper Pliya,Hamzeh Hajiloo,S. Romagnosi,Duncan Cree,Salah Sarhat,Mark F. Green
出处
期刊:Journal of building engineering [Elsevier]
卷期号:38: 102214-102214 被引量:38
标识
DOI:10.1016/j.jobe.2021.102214
摘要

Applications of recycled concrete aggregate (RCA) in the production of new concrete can help in addressing the growing solid waste challenge and preserving natural aggregate resources from depletion. The behaviour of RCA concrete under different loading scenarios is a well-studied topic at both material and structural levels. However, little attention has been directed at studying the performance of concrete made with RCA at elevated temperatures. Most of the previous studies have focused on the residual mechanical response of coarse RCA concrete after exposure to elevated temperatures. This paper presents an experimental study on the behaviour of natural aggregate concrete (NAC) and recycled aggregate concrete (RAC) during and after exposure to elevated temperatures. The RAC in this study contained both coarse and fine recycled concrete aggregates (CRCA and FRCA) as partial replacements of natural aggregates. The compressive strength of the NAC and RAC were evaluated at ambient temperature (unheated), after exposure to three different temperatures of 150, 300, and 450 °C (residual), at an elevated temperature of 450 °C without preloading (steady state), and during heating while being preloaded with 40% and 70% of the ambient strength (transient). A rate of 2 °C/min was used in all these heating scenarios. The results indicated that concrete with aggregates partially replaced with CRCA and FRCA exhibited good performance at elevated temperatures, and it can be considered comparable to conventional concrete. The results also showed that the compressive strengths measured during elevated temperatures, with or without preloading, were relatively higher than the residual compressive strengths for both RAC and NAC. The total thermal strains were also investigated with Digital Image Correlation. Preloading had an impact on the evolution of the total thermal strains and the occurrence of spalling for the types of concrete that were tested.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
Noah完成签到 ,获得积分10
4秒前
斯文败类应助Sophie采纳,获得10
9秒前
18秒前
Sophie发布了新的文献求助10
23秒前
ee_Liu完成签到,获得积分10
33秒前
Owen应助fff采纳,获得10
35秒前
36秒前
41秒前
如意的馒头完成签到 ,获得积分10
41秒前
43秒前
50秒前
知性的灵波完成签到,获得积分10
51秒前
eden发布了新的文献求助20
56秒前
eden完成签到,获得积分10
1分钟前
小奋青完成签到 ,获得积分10
1分钟前
tjfwg完成签到,获得积分10
1分钟前
1分钟前
燕山堂完成签到 ,获得积分10
1分钟前
Frank发布了新的文献求助10
1分钟前
wayne完成签到 ,获得积分10
1分钟前
1分钟前
djf点儿完成签到 ,获得积分10
2分钟前
顾矜应助朴实的耳机采纳,获得10
2分钟前
扬帆起航完成签到 ,获得积分10
2分钟前
tmrrrrrr完成签到 ,获得积分10
2分钟前
会扎针的小张完成签到,获得积分10
2分钟前
3分钟前
Sunny完成签到 ,获得积分10
3分钟前
虚幻的尔竹完成签到 ,获得积分10
3分钟前
3分钟前
背书强完成签到 ,获得积分10
3分钟前
火花完成签到 ,获得积分10
3分钟前
小西完成签到 ,获得积分10
3分钟前
3分钟前
zz完成签到 ,获得积分10
3分钟前
wefor完成签到 ,获得积分10
3分钟前
迷人的沛山完成签到 ,获得积分10
3分钟前
申木完成签到 ,获得积分10
4分钟前
段采萱完成签到 ,获得积分10
4分钟前
黄花菜完成签到 ,获得积分10
4分钟前
高分求助中
Sustainability in Tides Chemistry 1500
Handbook of the Mammals of the World – Volume 3: Primates 805
拟南芥模式识别受体参与调控抗病蛋白介导的ETI免疫反应的机制研究 550
Gerard de Lairesse : an artist between stage and studio 500
Digging and Dealing in Eighteenth-Century Rome 500
Queer Politics in Times of New Authoritarianisms: Popular Culture in South Asia 500
Manual of Sewer Condition Classification 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3068236
求助须知:如何正确求助?哪些是违规求助? 2722176
关于积分的说明 7476072
捐赠科研通 2369138
什么是DOI,文献DOI怎么找? 1256228
科研通“疑难数据库(出版商)”最低求助积分说明 609518
版权声明 596835