运煤栈桥结构抗冻性能及冻融寿命预测研究  

Study on the frost resistance and the freeze-thaw life prediction of the coal trestle structure

作　　者：关虓[1] 牛荻涛[2] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710055 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《混凝土》2017年第6期144-147,151,共5页Concrete

基　　金：国家自然科学基金(51278403);国家自然科学基金青年基金项目(51308445);教育部长江学者和创新团队发展计划(IRT13089)

摘　　要：采用室内加速试验与室外自然暴露试验相结合的方法,对北方寒冷地区混凝土运煤栈桥结构的抗冻性能及剩余寿命的预测进行了研究,分析了冻融对混凝土动弹性模量、质量、抗压强度的影响,并讨论了3种不同阻断剂对混凝土冻融损伤的影响规律,提出一种提高抗冻性能的最优方法。根据现场调查结果与试验结果,建立了室内加速冻融试验与室外自然暴露试验之间的定量关系,对寒冷地区运煤栈桥结构的冻融寿命进行合理预测,为栈桥的安全使用提供科学依据。It studied the frost resistance and residual life prediction of coal trestle of concrete structure by the combination of three methods including durability testing, lab accelerated testing,natural exposure testing.The influence of freeze-thaw on dynamic elastic modulus, mass, compressive strength of concrete was analyzed, and the influence law of three blocking agent on freeze-thaw damage of concrete was discussed.According to the investigation results and the experiment results, quantitative relation between lab accelerated testing and natural exposure testing was established, the freeze-thaw life of coal trestle structure in cold regions was predicted to provide scientific basis for safe operation of coal trestle.

关 键 词：耐久性检测 自然暴露试验 阻断剂 寿命预测 栈桥结构 

分 类 号：TU528.01[建筑科学—建筑技术科学]