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열병합발전소 플라이애시와 순환잔골재를 사용한 무시멘트 모르타르의 공학적 특성

Engineering Properties of the Non-Cement Mortar using the Fly ash from Combined Heat Power Plant and Recycled Fine Aggregate

  • Nam, Han-Kook (Department of Architectural Engineering, Hanbat National University) ;
  • Lim, Jeong-Geun (Department of Architectural Engineering, Hanbat National University) ;
  • Lee, Sang-Soo (Department of Architectural Engineering, Hanbat National University)
  • 투고 : 2015.05.13
  • 심사 : 2015.10.26
  • 발행 : 2015.12.20

초록

본 연구는 순환골재의 재활용 방안 및 시멘트를 대체할 수 있는 결합재에 대한 연구가 필요한 실정으로 고로슬래그, 플라이애시, 열병합플라이애시 등을 시멘트 대체재로 활용하여 무시멘트 모르타르를 제조하고자 하였다. 기초 실험에서는 결합재의 비율 및 알칼리 자극제의 선정을 위한 실험을 실시하였으며, 실험결과 결합재는 플라이애시 20%, 열병합플라이애시 40%를 치환한 경우 가장 높은 강도 값을 나타내었으며 알칼리 자극제로 NaOH 2.5%, $Ca(OH)_2$ 7.5%를 혼합하여 사용할 경우 가장 높은 강도 값을 나타내었다. 따라서 본 실험에서는 기초 실험에서 얻어진 최적 배합을 토대로 순환 잔골재의 치환율에 따른 무시멘트 모르타르의 특성을 검토하여 열병합플라이애시와 순환 잔골재를 사용한 모르타르의 공학적 특성을 분석하고자 하였다. 실험결과, 순환 잔골재의 적정 치환율은 75%인 것으로 나타났다.

In this study, to suggest the application method of recycled fine aggregate, the non-cement mortar was prepared and studied with the binders of blast furnace slag, fly ash, and fly ash from combined heat power plant. As a basic experiment, a series of tests was conducted to determine the potions of the binders and types of activator. When the binder was consisted with 20% of fly ash and 40% of fly ash from combined heat power plant, the highest strength of the mortar was obtained, and as an activator, the combination of sodium hydroxide 2.5%, and calcium hydroxide 7.5% showed the highest strength of the mortar. Therefore, this study focuses on engineering properties of mortar contains fly ash from combined heat power plant and recycled fine aggregate according to replacement ratio of recycled fine aggregate based on the optimum mix from the basic experiment. As a result, the best replacement ratio of recycled fine aggregate is 75%.

키워드

참고문헌

  1. Lim SS. Mecanical Properties of Non-Cement Matrix according to rreplacement ratio of Fly Ash in the Thermoelectric Power Plant with Combined Heat and Power Plant [Dissertation]. [Daejeon (Korea)]: Hanbat National University; 2014. 56 p.
  2. Jeong JY. Properties of foamed concrete according to using methods and types of foaming agent [Dissertation]. [Cheonan-si (Korea)]: Kongju National University; 2012. 137 p.
  3. Hwang JP, Jin SH, Ann KY. Estimation of CO2 emission with raw materials and energy sources. Proceeding of the Korea Concrete Institute conference; 2011 Nov;2(23):785-6.
  4. Lee YS, Lee SS, Song HY. Strength properties according to the conditions of low carbon inorganic composite using industrial by-product. journal of the Korea institute of building construction. 2012 Feb;12(1):54-63. https://doi.org/10.5345/JKIBC.2012.12.1.054
  5. Lee SS, Kim YM, Park SG. Strength properties of non-portland cement lightweight matrix according to types and addition ratios of alkali activator. journal of the Korea institute of building construction. 2014. Aug;14(4):301-7. https://doi.org/10.5345/JKIBC.2014.14.4.301