Synthesis, Structure, and Thermal Stability of Magnesium Oxychloride 5Mg(OH)2∙MgCl2∙8H2O

硅酸盐水泥 热稳定性 抗压强度 材料科学 煅烧 傅里叶变换红外光谱 化学工程 热分析 矿物学 水泥 化学 复合材料 冶金 热的 有机化学 物理 气象学 工程类 催化作用
作者
Adéla Jiříčková,Michal Lojka,Anna-Marie Lauermannová,Filip Antončík,David Sedmidubský,Milena Pavlíková,Martina Záleská,Zbyšek Pavlík,Ondřej Jankovský
出处
期刊:Applied sciences [MDPI AG]
卷期号:10 (5): 1683-1683 被引量:39
标识
DOI:10.3390/app10051683
摘要

Today, low-energy and low-carbon footprint alternatives to Portland cement are searched because of huge CO2 emissions coming from Portland clinker calcination. Because of some superior properties of magnesium oxychloride cement (MOC) and the lower carbon footprint of its production, MOC became an intensively studied material with high application potential for the design and development of construction products. In this contribution, magnesium oxychloride with stoichiometry 5Mg(OH)2∙MgCl2∙8H2O (Phase 5) was prepared and characterized. The kinetics of formation and the phase composition of the material were determined using X-ray diffraction and consequent Rietveld analysis. The morphology was studied by scanning electron microscopy, and the chemical composition was determined by both energy-dispersive spectroscopy and X-ray fluorescence. Moreover, the simultaneous thermal analysis in combination with mass spectroscopy and Fourier-transform infrared spectroscopy was employed to study the thermal stability. Using mass spectroscopy, we were able to clarify the mechanism of water and hydrochloric acid release, which was not previously reported. The observed structural and chemical changes induced by exposure of studied samples to elevated temperatures were linked with the measured residual macro and micro parameters, such as bulk density, specific density, porosity, water absorption, compressive strength, and pore size distribution. The Phase 5 revealed a needle-like crystalline morphology which formed rapidly and was almost completed after 96 h, resulting in relatively high material strength. The four-day compressive strength of magnesium oxychloride cement was similar to the 28-day compressive strength of Portland cement. The thermal stability of Phase 5 was low as the observed disruptive thermal processes were completed at temperatures lower than 470 °C.
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
大幅提高文件上传限制,最高150M (2024-4-1)

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
piaobo55发布了新的文献求助10
刚刚
1秒前
1秒前
ztt发布了新的文献求助10
2秒前
jusser发布了新的文献求助10
2秒前
2秒前
万事屋发布了新的文献求助10
2秒前
cctv18应助酷炫烤鸡采纳,获得10
4秒前
5秒前
5秒前
L912294993发布了新的文献求助10
5秒前
5秒前
万能图书馆应助卿十采纳,获得10
7秒前
Orange应助Spiderman采纳,获得10
7秒前
毛毛发布了新的文献求助10
8秒前
吴龙发布了新的文献求助10
8秒前
12秒前
12秒前
沉静秋莲发布了新的文献求助10
12秒前
13秒前
沉默的一江关注了科研通微信公众号
15秒前
毛毛完成签到,获得积分20
17秒前
18秒前
20秒前
老孟完成签到,获得积分10
20秒前
斯文败类应助考研小白采纳,获得10
20秒前
22秒前
领导范儿应助韦老虎采纳,获得10
22秒前
深情安青应助壮观以松采纳,获得10
24秒前
熊亚丹发布了新的文献求助10
25秒前
26秒前
慕容尔曼完成签到,获得积分10
26秒前
伶俐世德发布了新的文献求助10
27秒前
科目三应助guojingjing采纳,获得10
27秒前
27秒前
讨厌麻烦发布了新的文献求助10
28秒前
28秒前
好大的雨完成签到,获得积分10
28秒前
SciGPT应助南木采纳,获得10
28秒前
H123应助阿大呆呆采纳,获得30
29秒前
高分求助中
Manual of Clinical Microbiology, 4 Volume Set (ASM Books) 13th Edition 1000
Sport in der Antike 800
De arte gymnastica. The art of gymnastics 600
Berns Ziesemer - Maos deutscher Topagent: Wie China die Bundesrepublik eroberte 500
Stephen R. Mackinnon - Chen Hansheng: China’s Last Romantic Revolutionary (2023) 500
Sport in der Antike Hardcover – March 1, 2015 500
Boris Pesce - Gli impiegati della Fiat dal 1955 al 1999 un percorso nella memoria 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 有机化学 工程类 生物化学 纳米技术 物理 内科学 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 电极 光电子学 量子力学
热门帖子
关注 科研通微信公众号,转发送积分 2422412
求助须知:如何正确求助?哪些是违规求助? 2111619
关于积分的说明 5346013
捐赠科研通 1839118
什么是DOI,文献DOI怎么找? 915531
版权声明 561205
科研通“疑难数据库(出版商)”最低求助积分说明 489669