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
咕咕鸽完成签到,获得积分10
刚刚
Jasper应助直率的颜演采纳,获得10
刚刚
1秒前
在水一方应助善良的天德采纳,获得10
1秒前
2秒前
2秒前
2秒前
2秒前
2秒前
寒冷寻桃完成签到 ,获得积分10
3秒前
3秒前
3秒前
wjx发布了新的文献求助10
3秒前
3秒前
wjx发布了新的文献求助10
3秒前
3秒前
海派Hi完成签到 ,获得积分10
3秒前
xyj6486发布了新的文献求助10
4秒前
煎饼发布了新的文献求助10
4秒前
听雨发布了新的文献求助10
4秒前
NexusExplorer应助靓丽芙蓉采纳,获得10
4秒前
5秒前
6秒前
7秒前
Xenia完成签到 ,获得积分10
7秒前
7秒前
在望完成签到,获得积分0
7秒前
7秒前
7秒前
7秒前
7秒前
木可完成签到,获得积分10
8秒前
wjx发布了新的文献求助10
8秒前
嘟嘟完成签到,获得积分20
8秒前
wjx发布了新的文献求助10
8秒前
wjx发布了新的文献求助10
9秒前
wjx发布了新的文献求助10
9秒前
wjx发布了新的文献求助10
9秒前
wjx发布了新的文献求助10
9秒前
wjx发布了新的文献求助10
9秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
Effective Learning and Mental Wellbeing 300
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 3974943
求助须知:如何正确求助?哪些是违规求助? 3519467
关于积分的说明 11198482
捐赠科研通 3255728
什么是DOI,文献DOI怎么找? 1797904
邀请新用户注册赠送积分活动 877261
科研通“疑难数据库(出版商)”最低求助积分说明 806224