EFFECT OF MORTAR COATING ON CONCRETE CARBONATION

Authors

Wen-Hu Tsao, Department of Civil Engineering, China University of Science and Technology, Taipei, Taiwan Department of Banking and Finance, Tamkang University, TaiwanFollow
Ming-Te Liang, Department of Harbor and River Engineering, National Taiwan Ocean University, Keelung, Taiwan
Jiang-Jhy Chang, Department of Harbor and River Engineering, National Taiwan Ocean University, Keelung, Taiwan
Nai-Ming Huang, Department of Civil Engineering, China University of Science and Technology, Taipei, Taiwan

Abstract

The mechanism of the effect of mortar coating on carbonation of concrete is investigated. Theoretical methods of Fick's first and second laws of linear diffusion are used to calculate the carbonation depth of concrete without and with mortar coating, respectively. Theoretical analyses are also done to obtain the carbonation retard coefficients of mortar coating on concrete with surface coatings. A great deal of well organized experimental tests are carried out to verify the values of calculation. The results of present study indicate that the suitable mortar coating on concrete can effectively delay carbonation of concrete. The carbonation depth is inversely proportional to the thickness of surface coating with mortar. The average values, measured from experiment and predicted from Fick's first and second laws of linear diffusion, of carbonation retard coefficient of mortar coating are 1.70 and 2.19, respectively.

Recommended Citation

Tsao, Wen-Hu; Liang, Ming-Te; Chang, Jiang-Jhy; and Huang, Nai-Ming (2015) "EFFECT OF MORTAR COATING ON CONCRETE CARBONATION," Journal of Marine Science and Technology: Vol. 23: Iss. 4, Article 4.
DOI: 10.6119/JMST-014-0508-1
Available at: https://jmstt.ntou.edu.tw/journal/vol23/iss4/4