The effect of crack width on the service life of reinforced concrete structures

[摘要] Reinforced concrete has become a widely used construction material around the world. Nowadays, the assessment of deterioration and life expectancy of reinforced concrete structure is very important and necessary as concrete is a complex material with brittle failure. Under the effect of load and over time, cracks occur in the structure, significantly reducing its performance and durability. Therefore, a number of models for predicting the penetration of chloride ions into the concrete were proposed to assess the durability of the structure. In the study performed by T B Viet (2016) [1], the author proposed a new theoretical model, especially considering the effects of macro and micro cracking on the diffusion coefficient of chloride ion in the cracked concrete. The following experimental results, in term of electrical indication of concrete's ability to resist chloride ion penetration, are used to calculate the lifespan of a reinforced concrete structure according to Dura Crete approach [8] with different crack widths to evaluate the accuracy and reliability of the above model in the range of concrete compressive strength of 30-70MPa.

[发布机构] University of Transport and Communications, Campus in Ho Chi Minh City, Viet Nam^1;University of Transport and Communications, Campus in Hanoi, Viet Nam^2

[效力级别] 运输工程

[关键词] Brittle failures;Chloride ion penetration;Chloride ions;Complex materials;Concrete compressive strength;Cracked concretes;Life expectancies;Theoretical modeling