JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2019, Vol. 36 ›› Issue (9): 142-145.DOI: 10.11988/ckyyb.20180901

• HYDRAULIC STRUCTURE AND MATERIAL • Previous Articles     Next Articles

Effect of Fly Ash on Recycled Concrete’s Resistance to Carbonization

DONG Wei1, SU Ying1, LIN Yan-jie2, XIAO Yang1   

  1. 1.School of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China;
    2.Infrastructure Construction Department, Inner Mongolia University of Science and Technology, Baotou 014010, China
  • Received:2018-08-22 Revised:2018-10-09 Online:2019-09-01 Published:2019-09-12

Abstract: Adding fly ash in recycled concrete accords with the concept of “The 13th Five-Year Green Development Plan”. The reasonable use of fly ash and recycled aggregate wastes is of great significance for economy and environment. In this research, we designed recycled concrete specimens dosed with different content of fly ash (0%, 15%, 25%, 35% and 45%) to investigate the rule of carbonization of recycled concrete mixed with fly ash. Results demonstrate that the carbonization depth of concrete is in positive relation with carbonizing age and fly ash content; the coefficient of CO2 diffusion is in a linear functional relation with fly ash content. Moreover, we built a prediction model for carbonization depth based on the coefficient of CO2 diffusion.

Key words: recycled concrete, fly ash dosage, carbonization depth, prediction model, coefficient of CO2 diffusion

CLC Number: