Impact of low temperature and NaCl attack on the fracture properties of engineered cementitious composites (ECC)

复合材料 材料科学 断裂韧性 沉浸式(数学) 氯化物 断裂(地质) 冶金 数学 纯数学
作者
Shuling Gao,Haoyu Meng,Yanping Zhu,Puxu Xie
出处
期刊:Journal of building engineering [Elsevier BV]
卷期号:76: 107114-107114 被引量:5
标识
DOI:10.1016/j.jobe.2023.107114
摘要

Engineered cementitious composites (ECC) is a potential reinforcement and repair material for hydraulic structures due to its excellent mechanical properties. However, the fracture properties of ECC under the coupling effect of low temperature and chloride ions attack are still unclear. In this study, fracture experiments were performed on ECC specimens under different working conditions (immersed in water and NaCl solutions for different time (0, 30, 60, and 90d) and undergoing different freeze-thaw cycles (0, 25, 50, and 100 cycles) in NaCl solution) at experimental temperatures of 20 °C and −20 °C. The relationship between the depth of chloride ions erosion and the nominal fracture energy was analyzed. The effect of the coupled of temperature and chloride ions attack on the fracture performance of ECC under different working conditions was investigated. The results showed that: Under the loading condition of −20 °C, the fracture parameters of ECC under NaCl solution immersion were all lower than those of the water immersion group, indicating that extravasated chloride ions negatively impacted ECC's fracture properties. When ECC was loaded at −20 °C, the initiation fracture toughness and unstable fracture toughness of ECC under NaCl solution immersion were lower than those of the water immersion group, but the fracture energy was larger than that of the water immersion group, and when the specimens were immersed for 90 days, the drop in the fracture energy of ECC loaded at −20 °C compared to 20 °C for the NaCl solution immersion group was 59.1% less than 62.7% for the water immersion group; While loading at 20 °C revealed a linearly declining relationship between erosion depth and fracture energy, loading at −20 °C revealed no discernible pattern. The crack initiation fracture toughness of ECC gradually decreased with the increase of the freeze-thaw cycles, but the specimens' crack initiation fracture toughness following NaCl freezing at −20 °C was consistently larger than that at 20 °C. Following 100 freeze-thaw cycles on the specimens, the increase in initiation fracture toughness at −20 °C compared to 20 °C for the water freeze-thaw group was 128.4% less than that of the salt freeze-thaw group, which was 135.8%, while the decrease in fracture energy was 19.9% less than that of the salt freeze-thaw group, which was 46.3%. It shows that the repair effect of ice on ECC after NaCl freeze-thaw cycles is stronger than that of water freezing at the low temperature.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

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
1秒前
帆帆完成签到,获得积分10
1秒前
3秒前
5秒前
future完成签到 ,获得积分10
5秒前
wwl关闭了wwl文献求助
6秒前
6秒前
6秒前
lzw完成签到,获得积分10
6秒前
帆帆发布了新的文献求助10
6秒前
量子星尘发布了新的文献求助10
6秒前
悦耳冷松完成签到,获得积分10
7秒前
8秒前
8秒前
9秒前
独特乘云发布了新的文献求助10
10秒前
悦耳冷松发布了新的文献求助10
10秒前
10秒前
dian完成签到 ,获得积分10
11秒前
吃饱饱完成签到 ,获得积分10
11秒前
彭于晏应助大力绿柏采纳,获得10
12秒前
12秒前
ri_290完成签到 ,获得积分10
13秒前
贾克斯发布了新的文献求助10
13秒前
何处芳歇发布了新的文献求助10
13秒前
小当家完成签到,获得积分10
13秒前
nightmare发布了新的文献求助10
14秒前
Ava应助独特乘云采纳,获得10
16秒前
义气黄焖排骨完成签到,获得积分10
16秒前
古藤完成签到 ,获得积分10
17秒前
shinian完成签到 ,获得积分10
17秒前
JamesPei应助nightmare采纳,获得10
18秒前
19秒前
20秒前
十年完成签到 ,获得积分10
21秒前
wwl发布了新的文献求助10
23秒前
24秒前
默默千亦完成签到 ,获得积分10
24秒前
贾克斯发布了新的文献求助10
25秒前
撸撸大仙完成签到,获得积分20
26秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 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 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989406
求助须知:如何正确求助?哪些是违规求助? 3531522
关于积分的说明 11254187
捐赠科研通 3270174
什么是DOI,文献DOI怎么找? 1804901
邀请新用户注册赠送积分活动 882105
科研通“疑难数据库(出版商)”最低求助积分说明 809174