Articles
  • A study of curing characteristics of CO2-absorption calcium silicate cement with respect to CO2 concentration

  • Hwa-Song Seoka,b, Jin-Sang Choc, Ki-Yeon Moonc,* and Chang-Woo Honga

  • aSchool of Civil, Urban, and Environmental Engineering, Korea National University of Transportation, 50 Deahak-ro, Chungju-si, Chungbuk 27469, Korea
    b7-9, Dongsuwon-ro, 46Beon-gil, Gwonseon-gu, Suwon-si, Gyeonggi-do, 16672, Korea
    cDepartment of Research and Development, Korea Institute of Limestone and Advanced Materials, 18-1 Udeok-gil, maepo-eup, Danyang, Chungbuk 27003, Korea

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

CSC is an eco-friendly, low-energy cement-based material, the use of which can reduce CO2 emissions by up to 70% over the entire course of the manufacturing and curing processes when compared to typical cement mixes. In the present study, the ability of CSC to realize its desired properties, i.e., being cured by the carbonation reaction, was examined. More specifically, CSC samples were cured at varying CO2 concentrations (0, 5, 10, 20%), and their ability to implement their desired properties was studied at each curing time (5, 10, 24, 48, 96 h). In doing so, the potential for utilizing CSC in practice was assessed.
The experimental results showed that with higher CO2 concentration, the carbonation reaction of CSC became accordingly faster. The compressive strength was measured to be over 56 MPa at curing 7 days, indicating that these CSC samples provided excellent early-stage strength. Also, all samples subjected to carbonation curing exhibited a much higher curing 7 days compressive strength regardless of the CO2 concentration in the curing atmosphere when compared to Type 1 cement in accordance with the Korean Industrial Standards. This indicates that these materials have a high potential for extended applications


Keywords: CO2 absorpbing, Calcium silicate cement, CO2 concentration, Carbonation, Curing condition

This Article

  • 2021; 22(1): 25-30

    Published on Feb 28, 2021

  • 10.36410/jcpr.2021.22.1.25
  • Received on May 6, 2020
  • Revised on Aug 19, 2020
  • Accepted on Sep 11, 2020

Correspondence to

  • Ki-Yeon Moon

  • Department of Research and Development, Korea Institute of Limestone and Advanced Materials, 18-1 Udeok-gil, maepo-eup, Danyang, Chungbuk 27003, Korea
    Tel : +82-43-422-2096 Fax: +82-43-422-5581

  • E-mail: kymoon@kilam.re.kr