基于盐湖提锂副产氧化镁的机场快速修补材料的基础研究

项目名称： 基于盐湖提锂副产氧化镁的机场快速修补材料的基础研究

项目编号： No.21276264

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 化学工业

项目作者： 余红发

作者单位： 中国科学院青海盐湖研究所

项目金额： 80万元

中文摘要： 我国的西北地区，环境气候条件恶劣，机场道面混凝土材料的耐久性差，破坏严重，制约了机场的正常使用。对机场道面紧急/快速修补材料的研究为维护我国西北地区的国土安全、少数民族的团结稳定和战时掌控制空权提供了强有力的保证。本文首次提出利用盐湖卤水提锂副产品含硼氧化镁的"烧结氧化镁的胶凝性能"和"B2O3的缓凝作用"，在西部地区研究制备低成本的机场道面紧急/快速修补材料- - 磷酸镁水泥（MPC）的基础理论。以含硼氧化镁为原料，添加磷酸盐和缓凝剂制备成MPC，测试MPC材料的基本力学性能、耐久性和对旧水泥混凝土的修补性能，研究其凝结硬化机理、缓凝剂作用机理、对机场混凝土的界面修补物理化学机理。主要为盐湖锂资源开发过程中的大量副产品含硼氧化镁找到利用的途径，达到盐湖资源的综合利用。另外，也为机场道面缺陷提供一种低成本、高耐久、与既有普通水泥混凝土之间的界面粘结强的紧急/快速修补技术。

中文关键词： 磷酸镁水泥；盐湖副产含硼氧化镁；快速修补；骨水泥；微观机理

英文摘要： Due to the abominable climate in the northwestern region of China, airport pavement concrete in this region shows poor durability and is inclined to damage. For the efficiency use of airport, emergency repair materials are essential. There are rich salt lake resources in this region of China, and boron containing magnesium oxide is a main byproduct of extracting lithium form salt lake brine. As a kind of cementitious material, boron containing magnesium oxide is similar to cement. By using of the retarding effect of B203, this research endeavors to provide a low cost emergency repair material. Using boron containing magnesium oxide as main raw material, combined with phosphate and retarder, magnesium phosphate cement (MPC) is expected to be obtained. Its basic mechanical properties, durability and its repair properties on the old cement concrete are to be measured. Its hardening mechanism and the action mechanism of retarder is to be analyzed, and the repair mechanisms, both physical and mechanical, are to be investigated. The main purpose of this research is to find a way for the abundant byproduct of salt lake resource, and at the same time provide an emergency repair method to the defects of airport pavements. This repair technology is expected to be not only rapid, but also low cost, durable and friendly to

英文关键词： Magnesium phosphate cement；Byproduct of boron-containing magnesium oxide；Bone cement；Rapid repairing；micro-mechanism