Cargando…

Effect of Modified Magnesium Oxide on the Properties of Magnesium Phosphate Cement under a Negative Temperature Environment

As a rapid repair material, magnesium phosphate cement (MPC) can be used under various environmental temperature conditions, but different temperatures significantly impact its strength and working performance. In this study, based on the surface modification of magnesium oxide, the working and mech...

Descripción completa

Detalles Bibliográficos
Autores principales: Luo, Xuanzhang, Lai, Zhenyu, Liu, Zhi, Xiao, Rui, Chen, Jiawei, Lu, Zhongyuan, Lv, Shuzhen, Wang, Jin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9786211/
https://www.ncbi.nlm.nih.gov/pubmed/36556853
http://dx.doi.org/10.3390/ma15249047
_version_ 1784858237468672000
author Luo, Xuanzhang
Lai, Zhenyu
Liu, Zhi
Xiao, Rui
Chen, Jiawei
Lu, Zhongyuan
Lv, Shuzhen
Wang, Jin
author_facet Luo, Xuanzhang
Lai, Zhenyu
Liu, Zhi
Xiao, Rui
Chen, Jiawei
Lu, Zhongyuan
Lv, Shuzhen
Wang, Jin
author_sort Luo, Xuanzhang
collection PubMed
description As a rapid repair material, magnesium phosphate cement (MPC) can be used under various environmental temperature conditions, but different temperatures significantly impact its strength and working performance. In this study, based on the surface modification of magnesium oxide, the working and mechanical properties of samples were investigated at an ambient temperature of −5 °C, and the hydration properties and microstructure of MPC were investigated using X-ray diffraction (XRD), thermogravimetric analysis (TG), mercury-in-pressure (MIP), and scanning electron microscopy (SEM). The results show that the modified magnesium oxide at a negative temperature prolongs the setting time of MPC from 10 min to more than 30 min, and fluidity can still be maintained or increased after half an hour. From 1 d to 28 d, the compressive strength growth rate of the reference group was 257.0% compared to 723.8% for the 10 wt% water-glass-modified MgO sample. K-struvite transformed from a blocky growth to a needle-like growth with the modified sample filling the pores and cracks inside the matrix. Compared with the unmodified sample, MPC’s porosity decreased from 9.62% to 9.23% for 10 wt% water-glass-modified MgO. Therefore, the surface modification of magnesium oxide not only prolonged the setting time but also further benefited mechanical performance, which provides the prerequisites for MPC construction in negative-temperature environments.
format Online
Article
Text
id pubmed-9786211
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-97862112022-12-24 Effect of Modified Magnesium Oxide on the Properties of Magnesium Phosphate Cement under a Negative Temperature Environment Luo, Xuanzhang Lai, Zhenyu Liu, Zhi Xiao, Rui Chen, Jiawei Lu, Zhongyuan Lv, Shuzhen Wang, Jin Materials (Basel) Article As a rapid repair material, magnesium phosphate cement (MPC) can be used under various environmental temperature conditions, but different temperatures significantly impact its strength and working performance. In this study, based on the surface modification of magnesium oxide, the working and mechanical properties of samples were investigated at an ambient temperature of −5 °C, and the hydration properties and microstructure of MPC were investigated using X-ray diffraction (XRD), thermogravimetric analysis (TG), mercury-in-pressure (MIP), and scanning electron microscopy (SEM). The results show that the modified magnesium oxide at a negative temperature prolongs the setting time of MPC from 10 min to more than 30 min, and fluidity can still be maintained or increased after half an hour. From 1 d to 28 d, the compressive strength growth rate of the reference group was 257.0% compared to 723.8% for the 10 wt% water-glass-modified MgO sample. K-struvite transformed from a blocky growth to a needle-like growth with the modified sample filling the pores and cracks inside the matrix. Compared with the unmodified sample, MPC’s porosity decreased from 9.62% to 9.23% for 10 wt% water-glass-modified MgO. Therefore, the surface modification of magnesium oxide not only prolonged the setting time but also further benefited mechanical performance, which provides the prerequisites for MPC construction in negative-temperature environments. MDPI 2022-12-18 /pmc/articles/PMC9786211/ /pubmed/36556853 http://dx.doi.org/10.3390/ma15249047 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Luo, Xuanzhang
Lai, Zhenyu
Liu, Zhi
Xiao, Rui
Chen, Jiawei
Lu, Zhongyuan
Lv, Shuzhen
Wang, Jin
Effect of Modified Magnesium Oxide on the Properties of Magnesium Phosphate Cement under a Negative Temperature Environment
title Effect of Modified Magnesium Oxide on the Properties of Magnesium Phosphate Cement under a Negative Temperature Environment
title_full Effect of Modified Magnesium Oxide on the Properties of Magnesium Phosphate Cement under a Negative Temperature Environment
title_fullStr Effect of Modified Magnesium Oxide on the Properties of Magnesium Phosphate Cement under a Negative Temperature Environment
title_full_unstemmed Effect of Modified Magnesium Oxide on the Properties of Magnesium Phosphate Cement under a Negative Temperature Environment
title_short Effect of Modified Magnesium Oxide on the Properties of Magnesium Phosphate Cement under a Negative Temperature Environment
title_sort effect of modified magnesium oxide on the properties of magnesium phosphate cement under a negative temperature environment
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9786211/
https://www.ncbi.nlm.nih.gov/pubmed/36556853
http://dx.doi.org/10.3390/ma15249047
work_keys_str_mv AT luoxuanzhang effectofmodifiedmagnesiumoxideonthepropertiesofmagnesiumphosphatecementunderanegativetemperatureenvironment
AT laizhenyu effectofmodifiedmagnesiumoxideonthepropertiesofmagnesiumphosphatecementunderanegativetemperatureenvironment
AT liuzhi effectofmodifiedmagnesiumoxideonthepropertiesofmagnesiumphosphatecementunderanegativetemperatureenvironment
AT xiaorui effectofmodifiedmagnesiumoxideonthepropertiesofmagnesiumphosphatecementunderanegativetemperatureenvironment
AT chenjiawei effectofmodifiedmagnesiumoxideonthepropertiesofmagnesiumphosphatecementunderanegativetemperatureenvironment
AT luzhongyuan effectofmodifiedmagnesiumoxideonthepropertiesofmagnesiumphosphatecementunderanegativetemperatureenvironment
AT lvshuzhen effectofmodifiedmagnesiumoxideonthepropertiesofmagnesiumphosphatecementunderanegativetemperatureenvironment
AT wangjin effectofmodifiedmagnesiumoxideonthepropertiesofmagnesiumphosphatecementunderanegativetemperatureenvironment