硅酸盐通报2012，Vol.31Issue(1)：111-116,6.
高性能玻璃纤维增强氯氧镁水泥的加速寿命试验与微观机理
Acceleration Life Test and Microscopic Mechanism of High Performance Glass Fiber Reinforced Magnesium Oxychloride Cement
摘要
Abstract
Bending strength change of glass fiber reinforced magnesium oxychloride cement (GRMC) board at 80 °C hot water accelerated aging was tested by the strand-in-cement ( SIC) method. Hydration product component, microscopic structure and corrosion feature of glass fibers in the oxychloride magnesium cement matrix were observed by XRD, DSC-TG, FT-IR and SEM. The results showed that its main hydration product 5·1·8 was hydrolysed and Mg(OH)2 became the main phase for common GRMC board after accelerated aging 2. 5 d at 80 °C. Hot water which led to the corrosion of glass fiber caused by matrix and rapid degradation of mechanical property , so the expected service life was not more than 4 years. For high performance GRMC board doped with compound water-repellent admixtures and slag,strength retention was higher than 60% at accelerated aging state because of the stability of 5 · 1 · 8 and noncorrision of glass fiber. Its expected service life exceeded 50 years. So, the stability of 5 · 1 · 8 was the important factor for noncorrision of glass fiber and long-term durability of high performance GRMC board.关键词
璃纤维增强氯氧镁水泥/SIC/老化试验/寿命/机理Key words
glass fiber reinforced magnesium oxychloride cement ( GRMC ) / SIC ( Strand In Cement) / accelerated ageing/ life/ mechanism分类
化学化工引用本文复制引用
余红发,董金美,刘倩倩,李颖,林启红..高性能玻璃纤维增强氯氧镁水泥的加速寿命试验与微观机理[J].硅酸盐通报,2012,31(1):111-116,6.基金项目
中国科学院"百人计划"项目 （）
青海省重大科技攻关项目(2008-G-158) （2008-G-158）
