极端温度冻融循环对混凝土耐久性的影响-西安建筑科技大学学报（自然科学版）

文章信息/Info

Title:: Effect of freezing-thawing cycle on the durability of concrete under Extreme Environment Conditions

作者:: 任战鹏1; 牛荻涛2; 吴敬涛1; 张剑2; 孟宁1; (1.中国飞机强度研究所,陕西西安 710065;2.西安建筑科技大学土木工程学院,陕西西安 710055)

Author(s):: REN Zhanpeng1; NIU Ditao2; WU Jingtao1; ZhANG Jian2; MENG Ning1; (1. AVIC Aircraft Strength Research Institute, Xian 710065China 2. College of Civil Engineering, Xian Univ of Arch & Tech, Xian 710055China)

Keywords:: concrete floor; extreme temperature; freezing-thawing cycle ; durability

摘要:: 采用飞机结构及机构环境试验系统模拟实验室内极端温度环境，对不同型号混凝土试块进行环境耐久性试验，得出了极端环境温度条件下冻融循环次数与混凝土试块的相对动弹性模量、质量损失率、抗折强度损失率和抗压强度损失率之间的变化规律，自然养护和未添加钢纤维混凝土试块在经历60次冻融循环后，其冻融特性出现明显下降。标准养护和添加钢纤维组混凝土试块的冻融特性明显优于自然养护和未添加钢纤维组的混凝土试块。

Abstract:: Using the environment test system of airplane structure simulates the extreme temperature to examine the durability of different groups of concrete. The study found that relationships between relative dynamic elastic modulus, mass loss ratio, compressive strength loss ratio, flexural strength loss ratio and freezing-thawing cycle number. After 60 times freezing-thawing cycle, the freezing-thawing characteristics of concretes with natural curing condition and concretes with steel-free fiber were evident decline. Concretes with standard curing condition and Concretes with steel fiber have batter freezing-thawing characteristics than the concretes with natural curing condition and the concretes with steel-free fiber