RESEARCH ON SALT CORROSION RESISTANCE OF RECYCLED AGGREGATE CONCRETE AFTER CARBONATION TREATMENT

HUANG Kailin; XUE Kai; LI Shujin

doi:10.13204/j.gyjzG21010416

Volume 51 Issue 8

Nov. 2021

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HUANG Kailin, XUE Kai, LI Shujin. RESEARCH ON SALT CORROSION RESISTANCE OF RECYCLED AGGREGATE CONCRETE AFTER CARBONATION TREATMENT[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 179-183. doi: 10.13204/j.gyjzG21010416

Citation:

HUANG Kailin, XUE Kai, LI Shujin. RESEARCH ON SALT CORROSION RESISTANCE OF RECYCLED AGGREGATE CONCRETE AFTER CARBONATION TREATMENT[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 179-183. doi: 10.13204/j.gyjzG21010416

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RESEARCH ON SALT CORROSION RESISTANCE OF RECYCLED AGGREGATE CONCRETE AFTER CARBONATION TREATMENT

doi: 10.13204/j.gyjzG21010416

School of Civil and Architectural Engineering, Changzhou Institute of Technology, Changzhou 213001, China

Received Date: 2021-01-04
Available Online: 2021-11-10
Publish Date: 2021-11-10

Abstract

Abstract

By changing the carbonation temperature, relative humidity and carbonation time, the best carbonation process parameters of recycled aggregate were determined; on this basis, natural aggregate, un-carbonized recycled aggregate and three kinds of carbonized aggregate were selected to prepare concrete. The influence of carbonation of recycled aggregate on the performance of recycled concrete in the corrosion of chloride and sulfuric acid was explored. The results showed that the apparent density, water absorption rate and crushing value of recycled aggregate increased significantly after carbonation. The optimal carbonation process parameters were as follows: temperature 20℃, relative humidity 55% and carbonation time 24 h. Compared with recycled concrete, the chloride ion penetration resistance of carbonated aggregate concrete was improved by 5.1%~22.1%, but lower than that of ordinary concrete. Unlike the chloride ion resistance, the sulphate attack resistance of carbonated recycled aggregate concrete was not only better than recycled concrete, but also higher than ordinary concrete.
- recycled aggregate concrete,
- optimal carbonation parameters,
- chloride ion penetration,
- sulphate attack

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References(18)

References

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