Cement mortar containing crumb rubber coated with geopolymer: From microstructural properties to compressive strength

材料科学 橡胶屑 复合材料 天然橡胶 抗压强度 聚合物 涂层 水泥 微观结构 多孔性 灰浆
作者
Junli Liu,Phuong T. Tran
出处
期刊:Construction and Building Materials [Elsevier BV]
卷期号:383: 131284-131284 被引量:13
标识
DOI:10.1016/j.conbuildmat.2023.131284
摘要

Coating rubber particles with cement paste has been widely adopted as an effective method to improve the mechanical strengths of rubberised concrete. However, this method introduces an additional amount of cement into the mixture system, thus unnecessarily further increasing the overall cement usage. This study introduced a new method of coating rubber surfaces with cement-free geopolymer paste. The geopolymer-coated crumb rubber was incorporated into cast cement mortar at three different replacement levels of river sand, including 7.5%, 15% and 22.5% by weight. The 28-day compressive strengths of different mixtures with geopolymer-coated (GP series) or untreated crumb rubber (U series) were measured, and the strength recovery was evaluated. Although the compressive strengths of GP series were constantly higher than those of U series, the effectiveness of strength recovery due to geopolymer coating on the rubber surface became less prominent with the increase in the crumb rubber content. Microstructural investigations included nanoindentation and scanning electron microscopy (SEM). The interfacial transitional zone (ITZ) between the cement matrix and geopolymer paste was observed to have porous microstructures with relatively low indentation modulus. Meanwhile, X-ray micro-computed tomography (μCT) analysis in coated rubber particles showed air voids existed within large rubber particles due to the agglomeration of crumb rubber. The microstructure in the ITZ region and internal voids in large rubber particles, together with the increased stiffness of rubber particles due to coating, jointly affected the effectiveness of strength recovery in cement mortar containing different proportions of crumb rubber.
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
枕星发布了新的文献求助10
1秒前
1秒前
2秒前
2秒前
求求大家了完成签到,获得积分10
2秒前
阳光完成签到,获得积分10
2秒前
Crystal完成签到 ,获得积分10
4秒前
5秒前
5秒前
6秒前
6秒前
6秒前
乐乐应助赖道之采纳,获得10
7秒前
7秒前
Sun_Chen完成签到,获得积分10
7秒前
体贴凌柏发布了新的文献求助10
8秒前
成就的笑南完成签到 ,获得积分10
8秒前
9秒前
9秒前
wyw123完成签到,获得积分10
9秒前
求大佬帮助完成签到,获得积分10
9秒前
李健的小迷弟应助zyq采纳,获得10
10秒前
陈隆完成签到,获得积分10
10秒前
哎呀完成签到 ,获得积分10
10秒前
量子星尘发布了新的文献求助10
11秒前
mary完成签到,获得积分10
11秒前
11秒前
朱成豪发布了新的文献求助10
13秒前
deallyxyz应助科研通管家采纳,获得10
13秒前
科目三应助科研通管家采纳,获得10
13秒前
大个应助科研通管家采纳,获得10
13秒前
比比谁的速度快应助曾珍采纳,获得50
13秒前
13秒前
予修应助科研通管家采纳,获得10
13秒前
搜集达人应助科研通管家采纳,获得10
13秒前
wanci应助科研通管家采纳,获得30
13秒前
13秒前
13秒前
吹雪完成签到,获得积分0
13秒前
美好的尔白完成签到,获得积分10
13秒前
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 4038368
求助须知:如何正确求助?哪些是违规求助? 3576068
关于积分的说明 11374313
捐赠科研通 3305780
什么是DOI,文献DOI怎么找? 1819322
邀请新用户注册赠送积分活动 892672
科研通“疑难数据库(出版商)”最低求助积分说明 815029