已入深夜,您辛苦了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!祝你早点完成任务,早点休息,好梦!

Effect of fluorogypsum and KH2PO4 on physical properties and hydration mechanisms of aluminate cement based grouting materials

铝酸盐 水泥 针状的 材料科学 抗压强度 泥浆 复合材料 微观结构
作者
Yuli Wang,Huiyu Tang,Guowen Sun,Junjie Wang,Jia Yang,Yuanjin Zhao
出处
期刊:Construction and Building Materials [Elsevier BV]
卷期号:417: 135346-135346 被引量:8
标识
DOI:10.1016/j.conbuildmat.2024.135346
摘要

This study investigated the influence of fluorogypsum and KH2PO4 on the mechanical properties and hydration mechanisms of aluminate cement based grouting materials. Physical properties including setting time, pH value and the compressive strength of aluminate cement based grouting materials with different mix design were investigated. The influencing factors and hydration mechanisms were quantified and discussed through XRD, TG, SEM and NMR. The water-cement ratio was fixed at 0.40, and the fluorogypsum content accounted for 10 wt% of the cement mass. With increasing KH2PO4 content, the setting time initially decreased and then prolonged, while the compressive strength at 3d and 28d first increased and then decreased. Among these variations, a content of 0.2 wt% KH2PO4 exhibited the optimal performance with initial and final setting times of 264 min and 308 min, respectively. The compressive strengths at 3 days and 28 days were recorded as 26.4 MPa and 60.5 MPa, respectively, exhibiting an increase of 76% and a remarkable enhancement of 228.80% compared to that of pure aluminate cement. The addition of fluorogypsum facilitated the formation of AFt, while KH2PO4 regulated the slurry's pH, concurrently enhancing AFt production, and the morphology of AFt transformed from acicular to a more slender fiber shape, which exhibited improved interlacing and overlapped properties, thereby promoting strength development. The hydration process was analyzed in conjunction with low-field nuclear magnetic resonator analysis. The findings revealed that the samples containing 10 wt% fluorogypsum and 0.2 wt% KH2PO4 in aluminate cement exhibited the highest levels of chemically bound water at both 3d and 28d, followed by samples with 10 wt% fluorogypsum in aluminate cement, while those composed solely of aluminate cement displayed the lowest content. The T2 spectra data were also fitted to a function, revealing a positive correlation between pore evolution and the hydration rate of the samples.
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
彼岸花开发布了新的文献求助50
1秒前
斯文败类应助善良芙采纳,获得10
4秒前
量子星尘发布了新的文献求助10
6秒前
并肩于雪山之巅完成签到 ,获得积分10
10秒前
徐zhipei完成签到 ,获得积分10
11秒前
栗子完成签到,获得积分10
12秒前
15秒前
高启强完成签到,获得积分10
16秒前
susu发布了新的文献求助10
19秒前
20秒前
奈思完成签到 ,获得积分10
22秒前
2333发布了新的文献求助10
25秒前
26秒前
遥远发布了新的文献求助10
30秒前
沉默的冬寒完成签到 ,获得积分10
31秒前
32秒前
耳鼻喉不发言完成签到,获得积分10
32秒前
Rondab应助wangmeiqiong采纳,获得10
35秒前
36秒前
ZYY完成签到,获得积分10
36秒前
ES完成签到 ,获得积分0
37秒前
清新的音响完成签到 ,获得积分10
37秒前
qq完成签到 ,获得积分10
39秒前
40秒前
小二郎应助Mingchun采纳,获得10
42秒前
能干宛秋发布了新的文献求助10
42秒前
善学以致用应助小菡菡采纳,获得10
44秒前
善良芙发布了新的文献求助10
45秒前
47秒前
遥远完成签到,获得积分10
47秒前
呜呼完成签到,获得积分10
48秒前
大个应助xiaohuangya采纳,获得10
48秒前
51秒前
53秒前
学者风范完成签到 ,获得积分10
53秒前
oldblack完成签到,获得积分10
53秒前
HunterKK7发布了新的文献求助10
54秒前
55秒前
55秒前
共享精神应助喂喂采纳,获得30
56秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
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
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 3976600
求助须知:如何正确求助?哪些是违规求助? 3520674
关于积分的说明 11204470
捐赠科研通 3257316
什么是DOI,文献DOI怎么找? 1798683
邀请新用户注册赠送积分活动 877861
科研通“疑难数据库(出版商)”最低求助积分说明 806595