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Sulfate Attack Resistance and Reliability Analysis of Fiber Reinforced Concrete Materials Based on Wiener Process
Emerging Materials Research ( IF 1.3 ) Pub Date : 2020-09-24 , DOI: 20.00110 Feifei Zhu, Hongxia Qiao, Jiangchuan Li
Emerging Materials Research ( IF 1.3 ) Pub Date : 2020-09-24 , DOI: 20.00110 Feifei Zhu, Hongxia Qiao, Jiangchuan Li
Sulfate erosion is one of the important factors causing the decline of concrete durability, and it is also one of the most environmentally damaging and most influential environmental erosion. In view of the problem that the durability of fiber reinforced concrete decreased due to sulfate attack, according to the natural environmental conditions in western China, the rapid corrosion test of fiber (layered, hybrid) concrete was carried out by the test method of accelerated erosion in saturated solution immersion. The loss of strength, mass and relative dynamic elastic modulus was studied as the law of durability degradation. A reliability analysis method for residual life of sulfate resistance of concrete based on wiener distribution is proposed. Dynamic elastic modulus were selected as the key degradation indicators to establish the fiber concrete reliability model and the life prediction. The results show that the layered hybrid fiber reinforced concrete has stronger erosion resistance. Among the reliability evaluation parameters, the relative dynamic elastic modulus is more sensitive than the mass loss. The wiener distribution process can effectively describe the degradation law of fiber concrete performance. Based on the experimental data, the residual life reliability model established by this method can directly reflect the relationship between the reliability of the test piece and the corrosion time, and reflect its remaining life.
更新日期：2020-09-24
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