原料摩尔比和矿物掺合料对柠檬酸改性硫氧镁砂浆性能的影响
PDF下载 (18748)薛 涛,范奕涛,刘婧涵,巴明芳 *.原料摩尔比和矿物掺合料对柠檬酸改性硫氧镁砂浆性能的影响[J].宁波大学学报(理工版),2018,31(4):81-87.DOI:
XUE Tao,FAN Yi-tao,LIU Jing-han,BA Ming-fang *.Effects of molar parameter and mineral admixtures on properties of citrate modified magnesium oxysulfate mortar[J].Journal of Ningbo University(Natural Science & Engineering Edition),2018,31(4):81-87.DOI:
| Title: | Effects of molar parameter and mineral admixtures on properties of citrate modified magnesium oxysulfate mortar |
| 作者: | 薛 涛, 范奕涛, 刘婧涵, 巴明芳 * |
| Author(s): | XUE Tao, FAN Yi-tao, LIU Jing-han, BA Ming-fang * |
| 关键词: | 硫氧镁砂浆; 柠檬酸改性; 保温隔热性能; 耐水性能; 导热系数 |
| Keywords: | magnesium oxysulfate mortar; citrate modified; thermal insulating properties; water-resistance properties; thermal conductivity |
| 分类号: | TQ52 |
| 文献标识码: | A |
| 摘要: | 为了提高硫氧镁基结构材料的各项性能, 研究了MgO/MgSO4摩尔比参数、不同矿物掺合料对柠檬酸改性硫氧镁砂浆力学性能、耐水性能及保温隔热性能的影响. 结果表明: 同水灰比普通硅酸盐水泥(P·O42.5)砂浆相比, MgO/MgSO4摩尔比在12:1~14:1时柠檬酸改性硫氧镁砂浆的早期抗折强度增加了69%~75%, 早期抗压强度提高了55%~78%, 导热系数降低了18%~30%; 以MgO/MgSO4摩尔比12:1为基准, 矿粉和粉煤灰分别以10%~15%质量分数等量取代氧化镁粉时, 对柠檬酸改性硫氧镁砂浆的力学性能、耐水性能以及保温隔热性能的影响效果最佳, 其28d抗折强度为11MPa, 抗压强度达到50MPa, 而导热系数为0.3606W·(m·K)-1. |
| Abstract: | In order to improve the properties of magnesium oxysulfate cemented materials, the effects of molar ratio and mineral admixtures on mechanical, water-resistance properties and thermal insulating properties of citrate modified magnesium oxysulfate cemented materials were investigated. Results showed that the optimum molar ratio of MgO/MgSO4 of citrate modified magnesium citrate cemented material is 12:1-14:1. Comparing to P·O42.5 with the same water cement ratio, the corresponding flexible strength at early age increases by 69%-75%, the compressive strength at early age increases by 55%-78%, and the thermal conductivity decreases by 18%-30%. When the content of slag and fly ash powder is 10%-15% under the 12:1 molar ratio of MgO/MgSO4, the mechanical properties, water resistance and the thermal insulation properties of magnesium oxysulfate materials are best, the flexible strength is 11MPa, the compressive strength is 50MPa and the thermal conductivity is 0.3606W·(m·K)-1. |
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| 备注/Memo: | 收稿日期: 2017－06－20. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/基金项目: 浙江省自然科学基金（LY17E080009）; 宁波市自然科学基金（2017A610311）; 浙江省大学生科技创新项目（2017R405045）.第一作者: 薛涛（1991－）, 男, 山东临沂人, 在读硕士研究生, 主要研究方向: 高性能绿色建筑材料. E-mail: 15067455164@163.com*通信作者: 巴明芳（1975－）, 女, 山东滨州人, 博士/副教授, 主要研究方向: 高性能绿色建筑材料. E-mail: bamingfang@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
