摘要
目的 对灌浆材料进行改性,以提高其在盐碱水溶液条件下的耐侵蚀性能。方法 通过纳米MgO对灌浆材料进行改性,选取H2O、NaCl、Na2SO4、NaOH的水溶液环境,测试灌浆材料的强度及耐蚀系数,分析不同盐碱水溶液环境对灌浆材料耐侵蚀性能的影响。结果 灌浆材料在H2O、NaCl、Na2SO4、NaOH等水溶液环境中,均有良好的耐侵蚀能力。掺入纳米MgO后,灌浆材料在NaOH的耐侵蚀能力最好,耐蚀系数达到1.524;在Na2SO4水溶液中,对掺入纳米MgO的灌浆材料长期抗压强度更有利;通过微观分析,在Na2SO4水溶液中,掺入纳米MgO的灌浆材料生成了碳酸镁盐等物质,在一定程度上提高了灌浆材料的强度。结论 150 d时,纳米MgO改性的灌浆材料在NaOH水溶液中的耐侵蚀性能最好,在Na2SO4盐溶液中对灌浆材料的抗压强度最有利。
The grouting material was modified to improve its corrosion resistance in saline-alkali aqueous solution.The grouting material was modified by nano-MgO,and the strength and corrosion resistance coefficient of the grouting material modified by nano-MgO were tested in four kinds of aqueous solutions(H 2O,NaCl,Na 2SO 4 and NaOH).In this way,the influence of different saline-alkali water solution environment on the corrosion resistance of grouting material can be analyzed.The results showed that the grouting materials had good corrosion resistance in aqueous solution such as H 2O,NaCl,Na 2SO 4 and NaOH.After adding nano-MgO,the corrosion resistance of the grouting material in NaOH is the best,and the corrosion resistance coefficient reaches 1.524.In the aqueous solution of Na 2SO 4,the long-term compressive strength of the grouting material with nano-MgO is advantageous.Through microscopic analysis,the grouting material with nano-MgO in Na 2SO 4 aqueous solution formed magnesium calcite and other substances,which improved the strength of the grouting material to a certain extent.It is concluded that the corrosion resistance of nano-MgO modified grouting material is the best in NaOH solution at 150 d,and the compressive strength of grouting material is the best in Na 2SO 4 salt solution.
作者
周红红
刘军
ZHOU Honghong;LIU Jun(School of Materials Science and Engineering,Shenyang Ligong University,Shenyang,China,110159;School of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang,China,110168)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2023年第5期899-906,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51972214)。
关键词
盐碱水溶液
纳米MgO
灌浆材料
强度
耐蚀系数
saline-alkali aqueous solution
nano-MgO
grouting material
strength
corrosion resistance coefficient
