Corrosion-induced cracking time in recycled aggregate concrete (RAC)

Engineering and Applied Science Research

关键词: recycled aggregate concrete;    cracking time;    corrosion current density;    reinforcement corrosion;   

DOI  :  10.14456/easr.2020.15

来源: DOAJ

【 摘 要 】

Theobjective of this researchwasto determinethe influence of using recycledconcrete aggregates(RCA)on the timefor corrosion-induced cracking.Three levelsofreplacementbyrecycledaggregateswereadopted, i.e., 0%, 50% and 100% by volume. CorrosionofreinforcementwasacceleratedusingDCcurrent.Thecompressiveandtensilestrengths werealso investigated. The results showed that the reinforcement mass losses of the RCA were 2.5% and 2.4% higher than those of the NAC for 50% and 100% replacement, respectively. The corrosion-induced cracking times of the RAC were 5.6% and 8.6% longerthan those oftheNACfor50%and100%replacement, respectively. Additionally, the Maaddawy’s and Modified Maaddawy’s models were found to be acceptable for predicting concrete cover cracking time.

【 授权许可】

Unknown