Iron and Aluminium Production Wastes as Exclusive Components of Alkali Activated Binders—Towards a Sustainable Alternative

废物管理 原材料 炼钢 人口 材料科学 冶金 氢氧化钠 熔渣(焊接) 硅酸盐水泥 环境科学 水泥 工程类 化学 化学工程 有机化学 人口学 社会学
作者
Nuno Cristelo,F. Castro,Tiago Miranda,Z. Abdollahnejad,A. Fernández‐Jiménez
出处
期刊:Sustainability [Multidisciplinary Digital Publishing Institute]
卷期号:13 (17): 9938-9938 被引量:6
标识
DOI:10.3390/su13179938
摘要

The sustainability of resources is becoming a worldwide concern, including construction and building materials, especially with the alarming increase rate in global population. Alternative solutions to ordinary Portland cement (OPC) as a concrete binder are being studied, namely the so-called alkali-activated cements (AAC). These are less harmful to the environment, as lower CO2 emissions are associated with their fabrication, and their mechanical properties can be similar to those of the OPC. The aim of developing alkali-activated materials (AAM) is the maximization of the incorporated recycled materials, which minimises the CO2 emissions and cost, while also achieving acceptable properties for construction applications. Therefore, various efforts are being made to produce sustainable construction materials based on different sources and raw materials. Recently, significant attention has been raised from the by-products of the steelmaking industry, mostly due to their widespread availability. In this paper, ladle slag (LS) resulting from steelmaking operations was studied as the main precursor to produce AAC, combined with phosphating bath sludge—or phosphate sludge (PS)—and aluminium anodising sludge (AS), two by-products of the surface treatment of metals, in replacement rates of 10 and 20 wt.%. The precursors were activated by two different alkaline solutions: a combination of commercial sodium hydroxide and sodium silicate (COM), and a disposed solution from the cleaning of aluminium extrusion steel dies (CLE). This study assesses the influence of these by-products from the steelmaking industry (PS, AS and CLE) on the performance of the alkali-activated LS, and specifically on its fresh and hardened state properties, including rheology, heat of hydration, compressive strength and microstructure and mineralogy (X-ray diffraction, scanning electron microscopy coupled with energy dispersive spectroscopy and Fourier transform infra-red. The results showed that the CLE had no negative impact on the strength of the AAM incorporating PS or/and AS, while increasing the strength of the LS alone by 2×. Additionally, regardless of the precursor combination, the use of a commercial activator (COM) led to more fluid pastes, compared with the CLE.
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
刚刚
刚刚
hyl完成签到,获得积分10
1秒前
积极的初南完成签到,获得积分10
2秒前
Livrik发布了新的文献求助10
3秒前
小小完成签到 ,获得积分10
3秒前
笨笨山芙发布了新的文献求助10
4秒前
5秒前
5秒前
6秒前
6秒前
7秒前
8秒前
量子星尘发布了新的文献求助10
9秒前
Livrik完成签到,获得积分10
9秒前
小猴子关注了科研通微信公众号
9秒前
阿Q完成签到,获得积分10
10秒前
yujd完成签到,获得积分10
10秒前
鹿仪发布了新的文献求助10
10秒前
10秒前
10秒前
Orange应助好宝宝采纳,获得10
12秒前
12秒前
GL发布了新的文献求助10
13秒前
13秒前
李健应助年轻的烨华采纳,获得10
15秒前
Jasper应助zhugepengju采纳,获得10
15秒前
16秒前
酢浆草小熊完成签到 ,获得积分10
16秒前
沈昊泽完成签到,获得积分10
19秒前
陈浩发布了新的文献求助10
19秒前
20秒前
春眠不觉小小酥完成签到,获得积分10
21秒前
22秒前
23秒前
23秒前
wwb完成签到,获得积分10
23秒前
在水一方应助meimale采纳,获得10
24秒前
星晴遇见花海完成签到 ,获得积分10
25秒前
25秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
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 3988868
求助须知:如何正确求助?哪些是违规求助? 3531255
关于积分的说明 11253071
捐赠科研通 3269858
什么是DOI,文献DOI怎么找? 1804822
邀请新用户注册赠送积分活动 881994
科研通“疑难数据库(出版商)”最低求助积分说明 809035