关键词: 抗冻耐久性;快速冻融;可拓层次分析法;相对动弹性模量

Abstract: In view of the complexity and uncertainty of the importance of factors affecting the durability of concrete materials,the Gansu Jingtai Sichuan electric pumping irrigation area was selected, by indoor rapid freeze-thaw test and considered about influential factors, such as fly ash, mineral powder, sulfate and carbonization.Based on extension analytic hierarchy process(EAHP), the calculated results were compared with the experimental results.The results show that the weight coefficients are as follows: fly ash(0.380)>carbonization(0.341)>mineral powder(0.236)>sulfate(0.043), which is internal factors on the durability of concrete is greater than the overall influence of external factors.The addition of fly ash has some unfavorable influence on the frost resistance of concrete and the addition of mineral powder increases slightly, carbonation and sulfate corrosion accelerated durability of concrete damage,and the longer the days of carbonization and the concentration of sulphate is more unfavorable. The relevant research can provide a useful reference for the optimization and design of mix proportion of concrete materials.

Key words: frost resisting durability;rapid freeze-thaw test;EAHP;dynamic elastic modulus