硅酸盐通报2018，Vol.37Issue(2)：411-416,6.
玻璃纤维增强碱式硫酸镁水泥的加速老化试验与微观机理
Accelerated Aging Test and Microscopic Mechanism of Glass Fiber Reinforced Basic Magnesium Sulfate Cement
摘要
Abstract
In order to study the long-term strength of glass fiber reinforced basic magnesium sulfate cement composite and evaluate its durability,SIC (Strand In Cement) test method was used to determine the flexural strength of glass fiber reinforced basic magnesium sulfate cement composite sheet at 50 ℃,80 ℃ hot water accelerated aging test conditions.The hydrothermal product was characterized by XRD and SEM,and the corrosion characteristics of glass fiber in basic magnesium sulfate cement matrix were observed.The results show that the flexural strength of the composite sheet decreases obviously with the increase of the time in the aging condition,because the 517 phase of the needle-like magnesium sulfate cement is decomposed into the sheet-like cementation-free Mg(OH)2;it needed 12 d when the strength retention rate of sheet material reached 50％ at 80 ℃ aging condition,while the magnesium oxide cement sample failure time is only 3 d,so the glass fiber reinforced alkaline magnesium sulfate cement material aging life of a long time,more suitable for the application in the actual project.关键词
耐久性/抗折强度/碱式硫酸镁水泥/微观机理/玻璃纤维Key words
durability/flexural strength/basic magnesium sulfate cement/microscopic mechanism/glass fiber分类
化学化工引用本文复制引用
邢赛男,吴成友,余红发..玻璃纤维增强碱式硫酸镁水泥的加速老化试验与微观机理[J].硅酸盐通报,2018,37(2):411-416,6.基金项目
国家自然科学基金(51662035,U140710) （51662035,U140710）
青海省自然科学基金(2015-ZJ-937Q) （2015-ZJ-937Q）
教育部春晖计划项目(Z2015041) （Z2015041）
青海大学中青年基金(2015-QGY-3) （2015-QGY-3）
