Utilization of iron tailings as substitute in autoclaved aerated concrete: physico-mechanical and microstructure of hydration products

雪硅钙石 尾矿 蒸压加气混凝土 抗压强度 材料科学 冶金 原材料 微观结构 石膏 泥浆 水泥 复合材料 化学 有机化学
作者
Baoguo Ma,Lixiong Cai,Xiangguo Li,Shouwei Jian
出处
期刊:Journal of Cleaner Production [Elsevier BV]
卷期号:127: 162-171 被引量:134
标识
DOI:10.1016/j.jclepro.2016.03.172
摘要

Based on the background that a large amount of iron tailings was stockpiled in China, the most appropriate preparation conditions of producing autoclaved aerated concrete (AAC) with iron tailing was studied. The slurry properties were tested to evaluate the effects of the raw material factors on gas forming character. The compressive and specific strengths were measured to assess the feasibility of producing B05, A2.5 AAC blocks. The analysis of morphology, mineral components and thermal property were carried out in order to determine the mineral composition of iron tailing AAC blocks. Leaching toxicity was determined to ensure the environmental safety of iron tailing AAC blocks. The results shows that under the following conditions, cement 8%, quicklime 21%–27%, 20 min ball milled siliceous 62%–68% (with 40%–60% substituted by iron tailings), gypsum 3%, ratio of water to raw material (W/R) 0.6, aluminum (Al) powder 0.14% and at 1.4 MPa steam pressure maintaining for 8 h, the bulk density can be between 490 and 525 kg/m3, compressive strength higher than 2.5 MPa and specific strength higher than 4700 N m/kg. The main minerals in the AAC were dough-like CSH gel, flake-like tobermorite and long-strip anhydrate besides quartz and other residual minerals from the iron tailings. The compressive strength is mainly attributed to the interconnected microstructure constituted of CSH gel and tobermorite. The thermal analysis also proved the existing of the main minerals.
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
minino完成签到 ,获得积分10
刚刚
1秒前
叶子完成签到,获得积分10
2秒前
jim_hacker发布了新的文献求助10
2秒前
tough发布了新的文献求助30
2秒前
张张张完成签到,获得积分10
2秒前
2秒前
丘比特应助fan采纳,获得10
2秒前
LMX发布了新的文献求助10
3秒前
3秒前
cheng4046发布了新的文献求助10
3秒前
yi完成签到,获得积分10
3秒前
4秒前
许多多完成签到,获得积分10
4秒前
华仔应助欢呼妙菱采纳,获得10
4秒前
4秒前
小王完成签到,获得积分10
4秒前
研友_pnxAJZ完成签到,获得积分10
5秒前
5秒前
6秒前
6秒前
大佬虎发布了新的文献求助30
6秒前
6秒前
11完成签到,获得积分10
6秒前
搜集达人应助文章大发采纳,获得10
7秒前
脚啊啊啊完成签到,获得积分10
7秒前
yy应助Fu付采纳,获得10
7秒前
夏夏霞完成签到,获得积分10
7秒前
7秒前
包子发布了新的文献求助10
7秒前
xdc发布了新的文献求助10
8秒前
Iridesent0v0完成签到,获得积分10
8秒前
专注凝蝶完成签到,获得积分20
9秒前
星辰大海应助来日方长采纳,获得20
9秒前
9秒前
阿湛发布了新的文献求助10
9秒前
丘比特应助shinn采纳,获得30
9秒前
9秒前
10秒前
WTH发布了新的文献求助10
10秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 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
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 3969335
求助须知:如何正确求助?哪些是违规求助? 3514162
关于积分的说明 11172430
捐赠科研通 3249456
什么是DOI,文献DOI怎么找? 1794853
邀请新用户注册赠送积分活动 875437
科研通“疑难数据库(出版商)”最低求助积分说明 804809