Mechanical strength model of engineered cementitious composites with freeze–thaw damage based on pore structure evolution

材料科学 极限抗拉强度 复合材料 多孔性 抗压强度 拉伸试验 胶凝的 水泥
作者
Shuguang Liu,Su Lu,Liqiang Yin,Changwang Yan,Lihe Lu,Ji Zhou
出处
期刊:Cement & Concrete Composites [Elsevier BV]
卷期号:134: 104706-104706 被引量:54
标识
DOI:10.1016/j.cemconcomp.2022.104706
摘要

A freeze-thaw cycle test, nuclear magnetic resonance (NMR) T2 spectrum test, uniaxial tensile test, and uniaxial compression test were designed to study the service conditions of engineered cementitious composites (ECC) in a freeze-thaw (FT) environment in cold areas. The degradation law of the mechanical properties and damage characteristics of the pore structure of ECC with three water-binder ratios (M1: W/B = 0.24, M2: W/B = 028, and M3: W/B = 0.32) are discussed. The results demonstrate that the number of micropores and mesopores in the ECC specimens increases with an increase in the number of freeze-thaw cycles (FTs), thus gradually increasing the porosity. The uniaxial tensile strength (UTS) and uniaxial compressive strength (UCS) decrease gradually with increasing number of FTs. After FTs300, the porosity of the three groups increases by 43.83%, 59.39%, and 59.16%; the loss ratios of UTS are 26.16%, 24.47%, and 19.63%; and the loss ratios of UCS are 31.52%, 27.98%, and 27.30%, respectively. Based on the mechanical properties and pore structure test results of ECC, relation models of the UTS and UCS of freeze-thaw damaged (FTD) ECC with porosity were constructed according to the simplified center hole model of ECC and the elastic mechanics theory. To further disclose the FT evolution laws of uniaxial tensile/compressive strengths (UT/CS), the relationship models of UT/CS and number of FTs with the degree of FTD were deduced. The constructed models and test results were compared with those of some classical porosity-strength models. It was found that the constructed models met the requirements of satisfactory reliability and applications.
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
杰尼龟的鱼完成签到 ,获得积分10
1秒前
安然完成签到 ,获得积分10
2秒前
张希伦完成签到 ,获得积分10
2秒前
任性翠安完成签到 ,获得积分10
6秒前
dong完成签到 ,获得积分10
8秒前
神说完成签到,获得积分0
10秒前
量子星尘发布了新的文献求助10
16秒前
Aimee完成签到 ,获得积分10
16秒前
徐彬荣完成签到,获得积分10
17秒前
研友_8yN60L完成签到,获得积分10
18秒前
搜集达人应助科研通管家采纳,获得10
18秒前
光亮的自行车完成签到 ,获得积分10
18秒前
李东东完成签到 ,获得积分10
33秒前
王多肉完成签到,获得积分10
37秒前
Iiiilr完成签到 ,获得积分10
38秒前
杨幂完成签到,获得积分10
39秒前
46秒前
hellokitty完成签到,获得积分10
49秒前
49秒前
小四发布了新的文献求助10
50秒前
56秒前
西瓜完成签到 ,获得积分10
56秒前
包容的忆灵完成签到 ,获得积分10
59秒前
高兴尔冬发布了新的文献求助10
1分钟前
xiang完成签到 ,获得积分0
1分钟前
小四完成签到,获得积分10
1分钟前
FashionBoy应助slayers采纳,获得30
1分钟前
量子星尘发布了新的文献求助10
1分钟前
黑眼圈完成签到 ,获得积分10
1分钟前
jia完成签到 ,获得积分10
1分钟前
如履平川完成签到 ,获得积分10
1分钟前
科目三应助忧伤的步美采纳,获得10
1分钟前
大椒完成签到 ,获得积分10
1分钟前
1分钟前
1分钟前
wisdom完成签到,获得积分10
1分钟前
slayers发布了新的文献求助30
1分钟前
1分钟前
e746700020完成签到,获得积分10
1分钟前
高兴尔冬完成签到,获得积分10
1分钟前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
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 4038039
求助须知:如何正确求助?哪些是违规求助? 3575756
关于积分的说明 11373782
捐赠科研通 3305574
什么是DOI,文献DOI怎么找? 1819239
邀请新用户注册赠送积分活动 892655
科研通“疑难数据库(出版商)”最低求助积分说明 815022