工程科学学报Issue(8)：976-983,8.DOI:10.13374/j.issn2095-9389.2015.08.002
碳酸盐溶液中富水充填材料的腐蚀及劣化机理
Corrosion and deterioration mechanism of water-rich filling materials in carbonate solutions
摘要
Abstract
In order to research the impact of carbonate ions on water-rich filling materials, strength testing, scanning electron microscopy, X-ray diffraction analysis and IR spectrum testing were used to analyze the macro- and micro-structural change and the corrosion and deterioration mechanism of the materials in sodium carbonate solutions. It is found that the compressive strength of the materials in a sodium carbonate solution whose mass fraction is 10% decreases significantly with increasing soaking time. When the soak age is 90 d, the compressive strength of the materials decreases by 72. 5% compared with standard curing for 28 d. After soaking for 28 d the specimen surface is muddy. XRD patterns show that after soaking in a sodium carbonate solution whose mass fraction is 10%, thaumasite generates in the materials. With increasing soaking time the amount of thaumasite increases. Infrared spectroscopy results show that there does not exist [ AlO6 ] . This confirms that ettringite in the materials soaking in the sodium carbonate solution drastically reduces and transforms into pulpy thaumasite. As non-cemented materials, thaumasite will cause serious damage to the hardening body of the materials. This shows that the carbonate solution has corrosive action on water-rich filling materials.关键词
充填材料/硫铝酸盐/碳酸盐/腐蚀/劣化Key words
filling materials/sulphoaluminates/carbonates/corrosion/deterioration分类
矿业与冶金引用本文复制引用
高萌,刘娟红,吴爱祥..碳酸盐溶液中富水充填材料的腐蚀及劣化机理[J].工程科学学报,2015,(8):976-983,8.基金项目
国家自然科学基金资助项目(51374036) （51374036）
“十二五”国家科技支撑计划资助项目(2012BAB08B02) （2012BAB08B02）
