[1]杨建明,钱春香,张青行,等.原料粒度对磷酸镁水泥水化硬化特性的影响[J].东南大学学报(自然科学版),2010,40(2):373-379.[doi:10.3969/j.issn.1001-0505.2010.02.030]
 Yang Jianming,Qian Chunxiang,Zhang Qinghang,et al.Effects of particle size of starting materials on hydration and hardening process of magnesia-phosphate cement[J].Journal of Southeast University (Natural Science Edition),2010,40(2):373-379.[doi:10.3969/j.issn.1001-0505.2010.02.030]
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原料粒度对磷酸镁水泥水化硬化特性的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
40
期数:
2010年第2期
页码:
373-379
栏目:
材料科学与工程
出版日期:
2010-03-20

文章信息/Info

Title:
Effects of particle size of starting materials on hydration and hardening process of magnesia-phosphate cement
作者:
杨建明12 钱春香13 张青行4 焦宝祥2 阎晓波2
1 东南大学材料科学与工程学院,南京 211189; 2 盐城工学院土木工程学院,盐城 224051; 3 东南大学江苏省土木工程材料重点实验室,南京 211189; 4 盐城市水利局,盐城 224003
Author(s):
Yang Jianming12 Qian Chunxiang13 Zhang Qinghang4 Jiao Baoxiang2 Yan Xiaobo2
1 School of Materials Science and Engineering, Southeast University,Nanjing 211189, China
2 College of Civil Engineering, Yancheng Institute of Technology, Yancheng 224051, China
3 Jiangsu Key Laboratory of Constru
关键词:
磷酸镁水泥(MPC) 粒度 凝结时间 强度
Keywords:
magnesia-phosphate cement(MPC) particle size setting time strength
分类号:
TU528.31
DOI:
10.3969/j.issn.1001-0505.2010.02.030
摘要:
研究了原料粒度对新型磷酸镁水泥(MPC)水化硬化过程的影响规律.首先,以一定量不同粒度的烧结氧化镁粉(MgO)和磷酸二氢钾(KH2PO4)搭配并掺入不同量的缓凝剂硼砂(Na2B4O7·10H2O)配制MPC.然后,测试MPC浆体3h内半绝热温升曲线、凝结时间和MPC硬化体的强度,并分析硬化体的物相组成和微观结构形貌.结果表明:MgO粉和KH2PO4的粒度对MPC水化硬化特性有显著影响,随着MgO粉和KH2PO4的颗粒粒径减小,早期水化反应速率加快,凝结时间缩短; 但对于抗压强度并非颗粒越小其值越大,在最佳MgO粉和KH2PO4粒度范围内,MPC硬化体抗压强度最高.同样,对一定粒度MgO粉和KH2PO搭配的MPC浆体,在硼砂适量时,MPC硬化体才能具有适宜的凝结时间、水化反应速度和较高的抗压强度.
Abstract:
The effects of the particle size of starting materials on the hydration and hardening process of magnesium-phosphate cement(MPC)are investigated by measuring the temperature rise within 3 h, setting time and compressive strength of MPC pastes. They are composed of certain amount of dead MgO powders and potassium phosphate(KH2PO4)with different particle sizes and different borax(Na2B4O7·10H2O)dosage. The hydration products and micrographs of the hardened MPC pastes are analyzed. The experimental results show that the particle size of dead MgO powers and KH2PO4 markedly affect the hydration and hardening process of MPC pastes. With the decrease of particle sizes of MgO powers and KH2PO4, the early hydration reaction rate of MPC paste accelerates obviously, and its setting time is shortened; however, the compressive strength of hardened MPC does not increase continuously with the decrease of the particle size of starting materials, and there exists an optimum particle size range of MgO powers and KH2PO4. With certain particle size of MgO powders and KH2PO4, there is also an optimum B dosage for the hardened MPC paste to have suitable setting time, temperate hydration rate and high compressive strength.

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备注/Memo

备注/Memo:
作者简介: 杨建明(1964—),女,博士生,副教授; 钱春香(联系人),女,博士,教授,博士生导师,cxqian@seu.edu.cn.
基金项目: 江苏省高校自然科学基础研究面上项目(08KJ560004)、住房和城乡建设部科学技术计划项目(2008-K4-35)、江苏省水利科技重点资助项目(2006021)、江苏省交通科学研究资助项目(08Y07-1).
引文格式: 杨建明,钱春香,张青行,等.原料粒度对磷酸镁水泥水化硬化特性的影响[J].东南大学学报:自然科学版,2010,40(2):373-379. [doi:10.3969/j.issn.1001-0505.2010.02.030]
更新日期/Last Update: 2010-03-20