Using silica fume for improvement of fly ash/slag based geopolymer activated with calcium carbide residue and gypsum

聚合物 硅粉 抗压强度 粉煤灰 材料科学 偏高岭土 磨细高炉矿渣 固化(化学) 复合材料
作者
Peiliang Cong,Linna Mei
出处
期刊:Construction and Building Materials [Elsevier BV]
卷期号:275: 122171-122171 被引量:128
标识
DOI:10.1016/j.conbuildmat.2020.122171
摘要

This study attempts to explore the feasibility of using calcium carbide residue (CCR) as a solid alkaline activator to prepare geopolymer binders. A mixture of fly ash and ground granulated blast furnace slag was activated with CCR to prepare one-part geopolymer. A conventional two-part geopolymer activated with sodium hydroxide (NaOH) solution was also made for comparison. The CCR-activated geopolymer with the highest compressive strength was selected to incorporate silica fume to improve its mechanical properties. Effects of the activator type/amount, the ratio of silica fume replacement and the curing age on the properties of geopolymer binders were evaluated. Mechanical behavior was mainly assessed by compressive strength tests, and hydration products were analyzed by FTIR, XRD and SEM-EDX. Also, the content of Ca(OH)2 in the system was calculated using TGA technique to investigate the effects of silica fume on the pozzolanic reaction. The results revealed that the CCR had high potential as an activator for the preparation of geopolymer binders, and geopolymer activated with 12 wt% CCR had the highest compressive strength. Increasing the CCR dosage could improve the compressive strength, while the addition of excess CCR led to a risk of strength loss. When the activator dosage was less than 8 wt%, the mechanical strength of CCR-activated geopolymer was found to be comparable with that of the NaOH-activated geopolymer. Moreover, the addition of silica fume was proved to enhance the strength of CCR-activated geopolymer. TGA results and SEM images analysis illustrated that adding silica fume to CCR-activated binders could promote the consumption of excessive CCR, facilitate the formation of hydration products and modify the pore structure.
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
量子星尘发布了新的文献求助10
3秒前
王波完成签到 ,获得积分10
5秒前
李大宝完成签到 ,获得积分10
6秒前
小白完成签到 ,获得积分10
8秒前
喵了个咪完成签到 ,获得积分10
10秒前
ld2024完成签到 ,获得积分10
10秒前
wonwojo完成签到 ,获得积分10
11秒前
Dabiel1213完成签到,获得积分10
16秒前
manmanzhong完成签到 ,获得积分10
16秒前
aowulan完成签到 ,获得积分10
18秒前
研友_8y2G0L完成签到,获得积分10
22秒前
zenabia完成签到 ,获得积分10
28秒前
RenatoCai完成签到 ,获得积分10
30秒前
婉莹完成签到 ,获得积分0
32秒前
邵123456789完成签到,获得积分10
33秒前
MM完成签到 ,获得积分10
33秒前
1002SHIB完成签到,获得积分10
42秒前
nihaolaojiu完成签到,获得积分10
42秒前
科研通AI2S应助科研通管家采纳,获得10
42秒前
顾矜应助科研通管家采纳,获得10
42秒前
sheetung完成签到,获得积分10
42秒前
科研通AI2S应助科研通管家采纳,获得10
42秒前
麦田麦兜完成签到,获得积分10
43秒前
我就想看看文献完成签到 ,获得积分10
1分钟前
梁三柏应助张wx_100采纳,获得10
1分钟前
HIH完成签到 ,获得积分10
1分钟前
1分钟前
梁三柏应助张wx_100采纳,获得10
1分钟前
丁静完成签到 ,获得积分10
1分钟前
哪吒发布了新的文献求助30
1分钟前
sadascaqwqw完成签到 ,获得积分10
1分钟前
HanFeiZi完成签到 ,获得积分10
1分钟前
健忘的晓小完成签到 ,获得积分10
1分钟前
梁三柏应助张wx_100采纳,获得10
1分钟前
量子星尘发布了新的文献求助10
2分钟前
阿明完成签到,获得积分10
2分钟前
GingerF应助滕皓轩采纳,获得50
2分钟前
潘fujun完成签到 ,获得积分10
2分钟前
秋水完成签到 ,获得积分10
2分钟前
lixian发布了新的文献求助10
2分钟前
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 3976735
求助须知:如何正确求助?哪些是违规求助? 3520831
关于积分的说明 11204848
捐赠科研通 3257602
什么是DOI,文献DOI怎么找? 1798800
邀请新用户注册赠送积分活动 877897
科研通“疑难数据库(出版商)”最低求助积分说明 806648