| 摘要: |
| 为提高硫氧镁水泥（MOSC）的耐水性，以煅烧沸石粉为掺合料制备MOSC，研究了煅烧前后沸石粉对MOSC凝结时间、力学性能、耐水性、相组成、微观形貌和孔结构的影响.结果表明：掺入煅烧沸石粉提高了MOSC的力学性能，且煅烧前后的沸石粉均可在MOSC体系中反应形成水化硅酸镁（M-S-H）凝胶，降低了MOSC的总孔隙率，提高了MOSC的耐水性，但掺入煅烧沸石粉的MOSC耐水性更优；MOSC中掺入20%经200 ℃煅烧、升温速率15 ℃/min处理的沸石粉后，MOSC的耐水性最优，其28 d抗压和抗折强度保留系数分别可达0.91、0.95. |
| 关键词: 硫氧镁水泥 煅烧 沸石粉 耐水性 相组成 微观形貌 |
| DOI：10.3969/j.issn.1007-9629.2024.03.002 |
| 分类号:TQ172.1 |
| 基金项目:辽宁省教育厅项目（LJKFZ20220193）；“十三五”国家重点研发计划子课题（2020YFC1909304） |
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| Effect of Calcined Zeolite Powder on Water Resistance of Magnesium Oxysulfate Cement |
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ZHOU Junfeng1, CHEN Xiaoyang1,2, CHEN Bing3, BI Wanli1,4, GUAN Yan1,4
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1.School of Materials and Metallurgy， University of Science and Technology Liaoning， Anshan 114051， China;2.School of Chemical Engineering， University of Science and Technology Liaoning， Anshan 114051， China;3.School of Naval Architecture， Ocean & Civil Engineering， Shanghai Jiao Tong University， Shanghai 200240， China;4.Reseach Institution of Keda Fengchi Magnesium Building Materials， University of Science and Technology Liaoning，Anshan 114051， China
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| Abstract: |
| To improve the water resistance of magnesium oxysulfate cement （MOSC）， MOSC were prepared using calcined zeolite powder as an admixture. The effects of calcined zeolite powder before and after calcination on the setting time， mechanical properties， water resistance， phase composition， microstructure， and pore structure of MOSC were investigated. The results indicate that the mechanical properties of MOSC are improved by adding calcined zeolite powder， and the hydrated magnesium silicate gel can be formed by the reaction of zeolite powder before and after calcination in the MOSC system， which reduces the total porosity of MOSC and improves the water resistance of MOSC， but the water resistance of MOSC mixed with calcined zeolite powder is better. After adding 20% zeolite powder that has been calcined at 200 ℃ and treated at a heating rate of 15 ℃/min， the water resistance of MOSC is optimal. The retention coefficients of compressive and flexural strength at 28 days can reach 0.91 and 0.95， respectively. |
| Key words: magnesium oxysulfate cement calcination zeolite powder water resistance phase composition microstructure |
