氯化镁腐蚀对地铁隧道衬砌混凝土测强曲线的影响研究  

Analysis of srtength figure for subway tunnel lining concrete caused by magnesium chloride corrosion

作　　者：赵金祥 余建军 

机构地区：[1]中铁九局集团有限公司,辽宁沈阳110000

出　　处：《混凝土》2013年第3期148-151,共4页Concrete

基　　金：中铁九局重点课题资助项目(11-08-88)

摘　　要：通过试验室干湿交替加速腐蚀试验,探索沈阳地铁隧道衬砌混凝土在氯化镁溶液中的腐蚀机理。测试腐蚀试验过程中地铁隧道衬砌混凝土的抗压强度、回弹值、超声波波速,同时还对腐蚀过程中宏观、微观现象进行了描述。结果表明:抗压强度与回弹值、超声波波速有较好的拟合关系,现有测强曲线不适用于隧道衬砌混凝土受氯化镁腐蚀后强度检测。回归数据,建立沈阳地铁隧道衬砌混凝土受氯化镁腐蚀后的无损测强曲线公式。Exploring Shenyang subway tunnel lining concrete attacked by Magnesium chloride through accelerated corrosion of weting-drying cycles in the laboratory.Testing the parameter of compressive strength, the rebound value, ultrasonic wave velocity, and at the same time the corrosion process macro and micro phenomenon was described in corrosion testing.The test results showed that the compressive strength had favorable regression relationship with the rebound and the ultrasonic velocity.The strength figure of exsting was not applicable to strength testing of subway tunnel lining concrete attacked by magnesium chloride.Establishing the strength figure of Shenyang subway tunnel lining concrete caused by magnesium chloride attact through analyzing the regression date.

关 键 词：干湿交替 氯化镁 抗压强度 测强曲线 

分 类 号：TU528.01[建筑科学—建筑技术科学]