In-situ 탄산화 기술이 적용된 콘크리트 2차제품 제조 연구
Research on manufacturing secondary construction products using in-situ carbonation technology
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
본 연구에서는 콘크리트 2차제품 제조시 기체상의 이산화탄소를 주입하는 In-situ 탄산화 기술의 적용 가능성 분석을 위해 이산화탄소 주입량에 따른 콘크리트 인터로킹 블록의 기초물성 및 미세구조 분석을 실시하였다. 안정적인 이산화탄소 주입을 위해 CO₂ 가스 주입용 콘크리트 혼합 설비를 구축하였으며, 이산화탄소 주입량을 시멘트량 대비 0, 0.1, 0.3, 0.5, 0.7 wt.%로 제어하였다. 기초물성 시험 결과, 이산화탄소 주입량이 0.3%까지 증가할수록 기존 배합 대비 높은 강도 거동을 보였으며, 주입량 0.5 % 이후에는 기존 배합보다 낮은 강도를 보였으나 콘크리트 2차제품의 강도 기준 (보차도용 콘크리트 인터로킹 블록 )을 만족하는 것으로 나타났다. 이는 콘크리트 인터로킹 블록 제조시 이산화탄소 주입에 따른 CaCO₃ 결정 및 C-S-H 등의 수화물 생성이 촉진된 것으로 판단되었다. 따라서 배합중 이산화탄소를 주입하는 탄산화기술을 다양한 콘크리트 2차제품 제조 공정에 적용할 수 있는 가능성을 확인하였다.
Abstract
In this study, the basic physical properties and microstructure of concrete interlocking blocks with amount of different CO₂ gas injection were analyzed according to determine the applicability of In-situ carbonation technology to construction secondary products. The amount of carbon dioxide gas injection was selected as 0, 0.1, 0.3, 0.5, 0.7 wt.% compared to cement amount. A lab-scale press equipment was designed to apply developed carbonation technology to real construction site. And mixer for stable CO₂ gas injection was designed. Using the designed devices, CO₂ gas injectedsamples were created and physical property of samples were performed. As a result of the physical property test, as the CO₂ injection amount increased to 0.3 %, it showed higher strength behavior compared to the original mix. And more than 0.5 % samples showed lower strength behavior than original sample, but they satisfied the standard of concrete interlocking block. This results were determined that CO₂ injection contributed to the creation of hydrates such as C-S-H. Therefore, the possibility of applying carbonation technology, which injects CO₂ during mixing, to various secondary construction products was confirmed.
참고문헌 (12)
- C.W. Hargis, "Calcium carbonate cement : A carbon capture, utilization, and storage(CCUS)technique", J. Mater, 14, pp.2709~ (2021)
- J. Farfan, "Trends in the global cement industry and opportunities for long-term sustainable CCU potential for Power-to-X", J. Clean. Prod, 217, pp.821~ (2019)
- M.G. Plaza, "CO2 capture, use, and storage in the cement industry : State of the art and expectations", Energies, 13, pp.5692~ (2021)
- J. Taylor, "Full-profile rietveld quantitative XRD analysis of portland cement : Standard XRD profiles for the major phase tricalcium silicate(C3S : 3CaO. SiO2)", Powder Diffr, 8, pp.138~ (1993)
- Z. Zhang, "Physical and chemical effects of isopropanol exchange in cement-based materials", Cem. Concr. Res, 145, pp.106461~ (2021)
- A. Mezhov, "A comparative study of factors influencing hydration stoppage of hardened cement paste", Sustainability, 15, pp.1080~ (2023)
- N.A. Voglis, "Identification of composite cement hydration products by means of X-ray diffraction", Mikrochim. Acta, 136, pp.181~ (2001)
- Z.H. Ou, "Comparison of FTIR, thermal analysis and XRD for determination of products of cement hydration", Adv. Mat. Res, 168-170, pp.518~ (2010)
- K.L. Scrivener, "Quantitative study of portland cement hydration by X-ray diffraction", rietveld analysis and independent methods, 2004, pp.34, 1541~
- A. Mendes, "NMR, XRD, IR and synchrotron NEXAFS spectroscopic studies of OPC and OPC", slag cement paste hydrates, 2011, pp.44, 1773~
- D. Wang, "Changes in mineral composition, growth of calcite crystal, and promotion of physico-chemical properties induced by carbonation of -C2S", J. CO2 Util, 34, pp.149~ (2019)
- Y. Li, "Effect of post-fire curing and silica fume on permeability of ultra-high performance concrete", Constr. Build. Mater, 290, pp.123175~ (2021)