Comparative study on the early properties of cement modified with different ionic polyacrylamides

水泥 絮凝作用 离子键合 流变学 材料科学 聚丙烯酰胺 化学工程 粘度 吸附 复合材料 化学 高分子化学 有机化学 离子 工程类
作者
Qiang Yuan,Zonglin Xie,Hao Yao,Minghao Fan,Tong Huang
出处
期刊:Construction and Building Materials [Elsevier BV]
卷期号:339: 127671-127671 被引量:22
标识
DOI:10.1016/j.conbuildmat.2022.127671
摘要

Polyacrylamide (PAM) has been widely applied as a viscosity modifier to optimize the workability of cement-based materials, but PAMs with different ionic types may show various effects, which is often ignored in practical engineering. In this paper, the early properties including the rheology, flowability, and setting of cement pastes modified by three ionic PAMs (anionic APAM, cationic CPAM, and nonionic NPAM) were contrastively studied. The absorption and hydration of cement pastes with different ionic PAMs were further investigated. Moreover, the contributions of physical flocculation and chemical hydration on the structural build-up of cement pastes were quantified by combining the static yield stress and heat release at the same time scale. The results indicated that three ionic PAMs showed different effects on the structural build-up, fluidity and setting of fresh cement pastes, which were dominated by the different physical flocculation and hydration retardation effects of three ionic PAMs on the cement pastes. The order of flocculation and hydration retardation effects of these three ionic PAMs was APAM ≫ NPAM > CPAM, which was concentration-dependence and evolved over times. The reason is mainly due to the distinct molecular structures and physicochemical properties of three ionic PAMs and their different adsorption behaviors with cements particles.
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
刚刚
JamesPei应助HEANZ采纳,获得10
刚刚
Francisco2333发布了新的文献求助20
刚刚
3秒前
坚果发布了新的文献求助10
3秒前
Akim应助成功采纳,获得10
4秒前
小名余土土完成签到 ,获得积分10
5秒前
5秒前
huayi发布了新的文献求助10
6秒前
9秒前
9秒前
U9A发布了新的文献求助10
9秒前
小琰砸完成签到,获得积分10
9秒前
Anthony发布了新的文献求助10
10秒前
123444发布了新的文献求助10
10秒前
懵懂的海露完成签到,获得积分10
11秒前
11秒前
14秒前
Jane发布了新的文献求助10
14秒前
BING发布了新的文献求助10
15秒前
15秒前
小丿丫丿丫完成签到 ,获得积分10
16秒前
kkkkedy完成签到,获得积分20
17秒前
17秒前
18秒前
伊斯坦布尔的鱼应助123444采纳,获得10
18秒前
Liu应助重要的奇异果采纳,获得30
19秒前
20秒前
就叫十一吧完成签到,获得积分10
22秒前
22秒前
亚麻灰色发布了新的文献求助10
22秒前
22秒前
Allenlee发布了新的文献求助10
23秒前
water应助wang采纳,获得10
23秒前
扎心发布了新的文献求助10
23秒前
怡然诗霜完成签到,获得积分10
24秒前
24秒前
CR7应助冉柒采纳,获得20
26秒前
26秒前
CodeCraft应助七七采纳,获得10
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
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 500
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
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 3971775
求助须知:如何正确求助?哪些是违规求助? 3516416
关于积分的说明 11182625
捐赠科研通 3251629
什么是DOI,文献DOI怎么找? 1796019
邀请新用户注册赠送积分活动 876216
科研通“疑难数据库(出版商)”最低求助积分说明 805358