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氧化硼对铝酸钙水泥水化性能的影响
作者:张传银1 叶国田1 尚学军1 翟鹏涛1 李红霞2 陈留刚1 3 
单位:1. 河南省高温功能材料重点实验室 郑州大学材料科学与工程学院 中国 郑州 450001 2. 先进耐火材料国家重点实验室 中国 河南 洛阳 471039 3. 荷语鲁汶大学材料工程系 比利时 鲁汶 3001 
关键词:铝酸钙水泥 水化 氧化硼 凝结时间 
分类号:TQ175
出版年,卷(期):页码:2016,44(8):1161-1165
DOI:10.14062/j.issn.0454-5648.2016.08.12
摘要:

对比研究了含与不含氧化硼对铝酸钙水泥水化行为的影响。通过测试水泥净浆的水化放热曲线,对比分析了铝酸钙水泥中的氧化硼杂质含量对水泥水化速率的影响,以及水泥水化时的电导率随养护时间的变化,阐述了该杂质对水泥溶解沉淀速率的影响。通过冷冻真空干燥的方法中止水泥水化,继而用X射线衍射和热重分析研究了上述两种水泥净浆的水化产物组成。用维卡仪测定了水泥砂浆的凝结时间,用跳桌法测定了水泥结合浇注料的流动值衰减。结果表明:铝酸钙水泥中的氧化硼杂质缩短了水泥的水化诱导期,加速了水泥水化形成大量沉淀的进程,从而促进了水泥的水化,缩短了砂浆的凝结时间,并加快了水泥结合浇注料的流动值衰减速度。
 

The hydration behavior of calcium aluminate cements in the presence and absence of B2O3 was investigated. The hydration rate of these two cements was determined via the exothermic temperature development of cement pastes. The dissolution-precipitation rates of the cement aqueous suspensions were evaluated by means of electrical conductivity. The cement hydration was terminated via vacuum freeze drying, and the resultant hydration products were analyzed by X-ray diffraction. The setting behavior of the mortars was determined by a Vicat apparatus, and the flow values of the castables containing the cements were measured on a vibration table. The results indicate that the presence of B2O3 in the cement shortens the induction period of the cements and accelerates the massive precipitation of the hydrates. B2O3 contained in the cement promotes the cement hydration rate, reduces the setting time of the mortar and leads to the flow decay of the castable.
 

基金项目:
国家自然科学基金(51372230、51572244);先进耐火材料国家重点实验室开发基金(201301)。
作者简介:
张传银(1974—),男,博士研究生。
参考文献:

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