DOI QR코드

DOI QR Code

Improving Quality of Eco-Mortar Incorporating Blast Furnace Slag and Recycled Aggregate Depending on Replacement Gypsum and Cement

고로슬래그 미분말과 순환잔골재를 사용하는 친환경 모르타르에 탈황석고 및 시멘트에 의한 품질향상

  • Baek, Byung Hoon (Department of Architectural Engineering, Semyung University) ;
  • Han, Cheon-Goo (Department of Architectural Engineering, Cheongju University)
  • Received : 2015.01.05
  • Accepted : 2015.03.23
  • Published : 2015.04.20

Abstract

As a solution of both environmental issue of reducing carbon dioxide emission and sustainable issue of exhausting natural resources, in concrete industry, many research on recycling various by-products or industrial wastes as the concrete materials has been conducted. The aim of this research is feasibility analysis of additional reaction with ordinary Portland cement and flue gas desulfurization gypsum based on the blast furnace slag and recycled fine aggregate based mortar to achieve the normal strength range. Consequently, in the case of mortar replaced 10% FGD and 30% OPC for BS, 80% of plain OPC mortar's compressive strength was achieved. Furthermore, when the water-to-binder ratio is decreased to keep the practically similar level of flow, it is expected to be achieve the equivalent compressive strength to plain OPC mortar.

최근, 콘크리트 산업에서는 $CO_2$ 배출량감소등 환경문제와 함께 부존자원의 고갈대책도 중요한 문제점으로 제기되어, 이를 동시에 해결하기 위하여 각종 산업부산물이나 산업폐기물을 콘크리트용 자원으로 재이용하는 방법이 연구되고 있다. 본 연구는 고로슬래그 미분말(BS)과 순환잔골재(RFA) 혼합 모르타르를 기반으로 하여 BS의 잠재수경성 반응을 탈황석고(FGD)와 보통포틀랜드 시멘트(OPC)의 자극반응으로 추가 활성화시킴으로써 일반 강도영역까지의 모르타르 활용성을 검토하고자 하였다. 결과적으로, BS에 FGD 10%, OPC 30%를 치환하고 RFA를 사용할 경우 OPC만을 사용하는 플레인 모르타르의 80%정도인 보통강도모르타르가 발휘되었지만 실용적인 측면에서 유동성적으로 플로치를 동일하게 유지하는 물-결합재를 낮춰 주게 된다면 더욱 플레인 강도영역에 근접할 수 있을 것으로 사료된다.

Keywords

References

  1. Kim DG. Development of Zero-Cement Brick using Blast Furnace Slag Powder, Recycled Fine Aggregates and Functional Fine Particle [Dissertation]. [Cheongju (Korea)]: Cheongju University; 2012. 177 p.
  2. Park KT. Effect of Mix Proportions on the Properties of Blast Furnace Slag Mortar Using the Recycled Fine Aggregates. Journal of the Korean Recycled Construction Resources Institute. 2010 May;2(1):47-50.
  3. Shim JW. A Study on the Strength Property of Recycled Fine Aggregate (Wet Type) Mortar with Blast Furnace Slag. Korea institute for Structural Maintenance Inspection. 2006 Oct;1(5):153-9.
  4. Baek BH, Han CG. Effect of Calcium Sulfate Dihydrate (Gypsum) on the Fundamental Properties of Slag-based Mortar. The Korea Institute of Building Construction. 2014 Jun;144(3):252-8.
  5. Kim TW, Hahm HG. Mechanical Properties of the Alkali-Activated Slag Mortar with Gypsum. Korea institute for Structural Maintenance Inspection. 2012 May;16(3):109-16. https://doi.org/10.11112/jksmi.2012.16.3.109
  6. Son SH. Development of Zero-Cement Mortar Using Reactivity of Recycled Fine Aggregates and Mineral Admixtures [Dissertation]. [Cheongju (Korea)]: Cheongju University; 2012. 165 p.
  7. Moon GD, Kim JH, Cho YK. Effect of Anhydrite on the Mechanical and Durability Properties of High Volume Slag Concrete. Journal of the Korean Recycled Construction Resources Institute. 2014 Sep;2(3):239-46. https://doi.org/10.14190/JRCR.2014.2.3.239
  8. Han CG, Kim JB. Development of Admixture for PHC Pile Concrete Using Anhydrite and Blast Furnace Slag Powder. Architectural Institute of Korea. 2012 Aug;27(8):123-30.
  9. Park HE, Jun YB, Jeong YU, Oh JE. Hydration of non-cement CaO-activated slag with various gypsum contents. Proceedings of the Korea Concrete Institute; 2013 Oct 16-18; Gangwon, Korea. Seoul (Korea): Korea Concrete Institute; 2013. p. 301-2.

Cited by

  1. Investigation on Properties of Cement Mortar Using Heat Treated Flue Gas Desulfurization Gypsum vol.16, pp.6, 2016, https://doi.org/10.5345/JKIBC.2016.16.6.497
  2. Quality of High Volume Blast Furnace Slag Mortar Depending on Desulfurization Gypsum Treating Methods and Fine Aggregate Type vol.4, pp.2, 2016, https://doi.org/10.14190/JRCR.2016.4.2.157