한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
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13mm 이하 순환굵은골재 치환이 콘크리트의 공학적 특성에 미치는 영향

Effect of the Replacement of Recycled Coarse Aggregates Under 13mm on Engineering Properties of the Concrete

  • Han, Min-Cheol (Department of Architectural Engineering, Cheongju University) ;
  • Kang, Byeong-Heo (Department of Architectural Engineering, Cheongju University)
  • 투고 : 2015.03.05
  • 심사 : 2015.03.27
  • 발행 : 2015.03.30
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초록

본 연구에서는 현행 레미콘사에서 콘크리트 제조 시 13mm 이하 굵은골재의 부족으로 인한 품질저하가 발생하는 문제를 해결하기 위하여 13mm 이하 순환굵은골재를 치환하여 콘크리트의 제반특성을 검토하였다. 실험변수로 13mm 이하 순환 굵은골재를 13~25mm 굵은골재에 10~100%까지 치환사용하여 콘크리트의 품질에 대해 분석하였다. 실험결과 13mm 이하 순환 굵은골재 치환사용으로 유동성이 증가하였으며, 공기량은 골재간의 공극충전효과로 인해 감소하였다. 또한 골재간의 연속입도 구성으로 콘크리트 내부에 공극이 감소되어 강도의 향상과 건조수축이 감소하였다, 이상을 종합하면 13mm 이하 순환 굵은골재를 13~25mm 굵은골재만 사용한 콘크리트에 30% 내외 치환사용시 콘크리트의 품질이 향상되는 것으로 나타났다.

The objective of this paper is to investigate experimentally the effect of the substitution of recycled aggregates under 13mm on the properties of the concrete using coarse aggregate with size of 13~25mm. Recycled aggregate under 13mm were substituted to the concrete ranged from 10% to 100%. To compare the properties with the case of recycled aggregate, crushed stone with smaller than 13mm was also substituted to the concrete by 20% and 40%. Test results showed that increase of recycled aggregate under 13mm resulted in the increase of slump and compressive strength compared with plain mixture, which was made with only aggregate with 13~25mm size. This is due to the dense gradation of aggregate in association with addition of relatively small particle. It is thought that the use of recycled aggregate under 13mm along with 30% contributes to the quality improvement of the concrete made with only 13~25mm aggregate.

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참고문헌

  1. Choi, K.S., You, Y.C., Yun, H.D., and Kim, K.H. (2008). "Properties of fresh concrete with recycled fine aggregate," Proceeding of the Korea Concrete institute Annual Conference, The Korea Concrete Institute, 2008(11), 373-376 [in Korean].
  2. Chung, H.S., Yang, K.H., and Kim, H.H. (2006). "The influence of the quality and the replacement level of recycled aggregate on the mechanical properties of concrete," Journal of the Architectural Institute of Korea, 22(6), 71-78 [in Korean].
  3. Jo, M.K., Zhao Y., Kang, B.H., Han, M.C., and Han, C.G. (2013). "Effect of grading of coarse aggregate on the fundamental properties of concrete," Korea Institute of Building Construction Conference Proceeding, The Korea Institute of Building Construction, Gyeongju, Korea, 13(1), 46-47 [in Korean].
  4. Kim, Y.C., Bae, J.H, Shin, J.L., Nam, J.S., Yeo, J.D., and Kwak, Y.K. (2010). "A study on the mechanical properties of concrete according to substitute rate of recycled aggregate," Proceeding of the regional association of Architrctural Institute of Korea Annual Conference, The Regional Assocation of Architectural Institute of Korea, 2010(1), 295-299 [in Korean].
  5. Sim, J.S., Park, C.W., Park, S.J., and Kim, Y.J. (2006). "Characterization of compressive strength and elastic modulus of recycled aggregate concrete with respect to replacement ratios," Journal of the Korean Society of Civil Engineers, 26(1), 213-218 [in Korean].
  6. Woo, J.K, and Ryu, H.G. (2007). "Analysis of basic property of sub-slab concrete mixed with recyeled coarse aggregate and admixture," Proceeding of the regional association of Architrctural Institute of Korea Annual Conference, The Regional Assocation of Architectural Institute of Korea, 1, 733-737.

피인용 문헌

  1. Fundamental Characteristics of Concrete According to Fineness Modulus and Replacement Ratio of Crushed Sand vol.3, pp.3, 2015, https://doi.org/10.14190/JRCR.2015.3.3.244