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Analysis of mechanical properties of secondary concrete products using CO₂ captured material

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2024, 34(2), pp.66-72
  • DOI : 10.6111/JKCGCT.2024.34.2.066
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : April 11, 2024
  • Accepted : April 19, 2024
  • Published : April 30, 2024

Hye-Jin Yu 1 Seo Sung-Kwan 1 Keum-Dan Park 1 Hyuk-Joon Kwon 2 Jeong-Hwan Kim 3

1한국세라믹기술원
2신우산업개발(주) 기술연구소
3한일에코산업(주) 기술연구소

Accredited

ABSTRACT

In this study, the applicability of CCMs (Carbondioxide conversion capture materials) manufactured by reacting carbon dioxide gas with DG (Desulfurization gypsum) as a cement substitute for secondary concrete products were evaluated and the basic physical properties of CCMs-mixed mortar and concrete specimens were measured to derive the optimal mixing ratio. The main chemical oxides of CCMs were CaO and SO3, and the main crystalline phases were CaSO4·2H2O, Ca(OH)2, CaCO3, and CaSO4. In addition, by the results of particle size analysis and heavy metal measurement, the applicability of CCMs as a cement substitute for secondary concrete products was confirmed. As a result of measuring the strength behavior using mortar and concrete specimens with CCMs, the compressive and flexural strength decreased as the mix ratio of CCMs increased, but requirements by the standards for interlocking blocks and retaining wall blocks, which are target products in this study, were satisfied up to the optimal mixing ratio of 10 wt.% substitution. Therefore, its applicability as a cement substitute for secondary concrete products was confirmed.

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