Assessing the viability of a high performance one-part geopolymer made from fly ash and GGBS at ambient temperature

聚合物 磨细高炉矿渣 硅酸钠 粉煤灰 抗压强度 材料科学 氢氧化钠 扫描电子显微镜 微观结构 复合材料 化学工程 工程类
作者
Borui Ma,Zhiduo Zhu,Wangwen Huo,Liu Yang,Yue Zhang,He Sun,Xiang-Qun Zhang
出处
期刊:Journal of building engineering [Elsevier]
卷期号:75: 106978-106978
标识
DOI:10.1016/j.jobe.2023.106978
摘要

This study aims to investigate the feasibility of preparing a one-part geopolymer using fly ash (FA) and ground granulated blast furnace slag (GGBS) as the main raw materials and solid sodium hydroxide and sodium silicate as activation conditions under ambient conditions. Orthogonal tests were conducted to study effects of FA on the GGBS mass ratio (F:G), solid alkali content, sodium hydroxide–to–sodium silicate mass ratio (SH:SS), and water-to-solid ratio on the unconfined compressive strength (UCS), setting time, and fluidity of the one-part geopolymers. The microstructure, composition, and pore distribution characteristics of the geopolymers were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled with energy-dispersive spectroscopy (EDS), and mercury intrusion porosimetry (MIP). The findings revealed that (1) the mechanical characteristics of the geopolymer were most severely influenced by F:G, and the compressive strength of the geopolymer considerably decreased with an increase in F:G. (2) The influences of the alkali content and water-to-solid ratio on the setting time of the geopolymer were essentially the same and significantly larger than those of the F:G and SH:SS variables. (3) The most important element affecting the fluidity of the geopolymer was the water-to-solid ratio. Microscopic analysis verified the results of the macroscopic experiments. The XRD and SEM-EDS tests indicated that the reaction system produced a mixed gel by activating some of the Ca in the GGBS was activated with FA, which filled the pores of the geopolymer and increased its strength. The MIP test also revealed that specimen S7 exhibited the smallest pore space among the selected specimens. The microscopic experiments revealed that the reaction system produced a mixture of calcium silicate hydrate (C-S-H) gels and hydrated sodium silicate N(C)-A-S-H gels.
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
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
欣喜乐天完成签到,获得积分10
刚刚
刚刚
英俊的铭应助派大星采纳,获得20
刚刚
surfing发布了新的文献求助10
刚刚
阿尼发布了新的文献求助30
刚刚
SAASD发布了新的文献求助10
1秒前
wanci应助pp采纳,获得10
1秒前
李繁蕊完成签到,获得积分10
3秒前
xingxinghan完成签到 ,获得积分10
3秒前
907lh发布了新的文献求助10
3秒前
酷波er应助深情海亦采纳,获得10
4秒前
4秒前
火日立发布了新的文献求助30
5秒前
7秒前
在水一方应助科研通管家采纳,获得10
7秒前
Akim应助科研通管家采纳,获得10
7秒前
温语堂应助科研通管家采纳,获得10
7秒前
打打应助科研通管家采纳,获得10
7秒前
7秒前
7秒前
ding应助科研通管家采纳,获得10
7秒前
Ava应助科研通管家采纳,获得100
8秒前
SciGPT应助科研通管家采纳,获得10
8秒前
善学以致用应助joji采纳,获得30
8秒前
8秒前
归尘发布了新的文献求助10
8秒前
8秒前
8秒前
907lh完成签到,获得积分10
9秒前
恰同学少年完成签到,获得积分10
9秒前
张童鞋发布了新的文献求助10
10秒前
hualidy完成签到,获得积分10
10秒前
11秒前
一杯CC完成签到,获得积分10
11秒前
sunshine发布了新的文献求助10
11秒前
11秒前
柯岩任完成签到 ,获得积分10
11秒前
NexusExplorer应助不展采纳,获得10
11秒前
ZJJ发布了新的文献求助10
11秒前
牛马完成签到,获得积分20
11秒前
高分求助中
Production Logging: Theoretical and Interpretive Elements 2700
Mechanistic Modeling of Gas-Liquid Two-Phase Flow in Pipes 2500
Kelsen’s Legacy: Legal Normativity, International Law and Democracy 1000
Handbook on Inequality and Social Capital 800
Conference Record, IAS Annual Meeting 1977 610
Interest Rate Modeling. Volume 3: Products and Risk Management 600
Interest Rate Modeling. Volume 2: Term Structure Models 600
热门求助领域 (近24小时)
化学 材料科学 生物 医学 工程类 有机化学 生物化学 物理 纳米技术 计算机科学 内科学 化学工程 复合材料 基因 遗传学 物理化学 催化作用 量子力学 光电子学 冶金
热门帖子
关注 科研通微信公众号,转发送积分 3546815
求助须知:如何正确求助?哪些是违规求助? 3123829
关于积分的说明 9357111
捐赠科研通 2822447
什么是DOI,文献DOI怎么找? 1551477
邀请新用户注册赠送积分活动 723475
科研通“疑难数据库(出版商)”最低求助积分说明 713766