Carbonation Behavior of Recycled Aggregate Concrete under Loading

Abstract:

A study on carbonation resistance of recycled aggregate concrete (RAC) subjected to different loading level was carried out. Three series of concrete mixtures were prepared with loading level of 0.5, 0.8, and 1.2 of ultimately tensive strength of concrete. The coarse recycled aggregate was used as 30%, 60% and 90% replacements of coarse natural aggregate and fine recycled aggregate as 10%, 20%, and 30% replacements of fine natural aggregate. Moreover, the fly ash and slag were employed as 15%, 25%, and 35% addition of cement. Although the action of the tensile stress had a negative effect on the carbonation resistance of RAC, it was found that the addition of fly ash and slag was able to mitigate this detrimental effect. The carbonation depth would increase with an increasing loading level and reduce when increasing the sand ratio.

• Periodical: Advanced Materials Research (Volumes 250-253)
• Pages: 779-782
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.250-253.779
• Online since: May 2011
• Authors: Ping Hua Zhu, Xin Jie Wang, Jin Cai Feng
• Keywords: Carbonation Resistance, Coupling Action, Loading Level, Recycled Aggregate Concrete (RAC)

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