Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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A Fundamental Study on the Potential of Alkali-Aggregate Reaction according to KS F 2545 and ASTM C 1260 Test Methods

KS F 2545와 ASTM C 1260 시험법에 따른 알칼리골재 잠재가능성에 관한 연구

  • Received : 2020.02.07
  • Accepted : 2020.04.01
  • Published : 2020.04.30
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Abstract

Chemical experiment KS F 2545 and Physical experiment ASTM C 1260 has been accomplished to estimate the potential of alkali aggregate. Used for testing aggregate samples are forest aggregate and recycled aggregate which collected in Gangwon province Samcheok and Pyeongchang, Jeollabuk province Gimje and Kochang, and Gyeongsangnam province Goryeong. As the results of chemical experiment confirmed that if silicate rock and carbonate rock are mixed, reduction in alkalinity is increase. So it has been identified that case makes a disturb at the result of alkali aggregate reaction. In 9 out of the 62 aggregate samples check dissolved silica exceeding 100 mmol/ℓ. and mortar bar length increase rate confirmed that 5 of 9 chemical method aggregates were 0.1~0.2% and 2 aggregates were 0.2%. As a result of the alkaline aggregate reaction test using the chemical method and the mortar bar method, the aggregates showing alkali aggregate reaction are sandstone and tuff aggregates. Therefore, Alkali aggregate reaction tests are required to use clastic sedimentary rocks and volcanic pyroclastic rocks aggregates.

강원도 삼척시와 평창군, 전라북도 김제시와 고창군 및 경상남도 고령군에서 채취한 62종의 산림골재와 순환골재를 대상으로 알칼리골재 잠재가능성을 평가하기 위해 화학적 실험법인 KS F 2545와 물리적 실험법인 ASTM C 1260을 수행하였다. 화학법 실험결과 규산염계 암석과 탄산염계 암석이 혼재된 경우 알칼리농도감소량이 높게 나타나 알칼리골재 잠재가능성 결과에 교란을 발생시키는 것으로 확인되었다. 62종의 골재 중 용해실리카량이 100 mmol/ℓ를 초과하는 골재는 9종이며, 이들의 물리적 실험결과 모르타르바의 길이증가율이 0.1~0.2%인 골재는 5종, 0.2% 이상인 골재는 2종으로 확인되었다. 화학법과 모르타르바법을 이용한 알칼리골재반응 시험결과, 알칼리골재 잠재반응을 보인 골재는 사암과 응회암이다. 따라서 쇄설성 퇴적암류와 화산 쇄설성 암석 골재를 사용하기 위해서는 알칼리골재 반응 시험들이 필요하다.

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References

  1. Oh, J. H., 2016 : The current status of aggregate industry in Korea, J. of Korean Inst. of Resources Recycling, 25(4), pp.80-86. https://doi.org/10.7844/kirr.2016.25.4.80
  2. Hong, S. H., Han, S. H., Yun, K. K., 2006 : A case study for deterioration due to alkali-silica reactionin the cement concrete pavement, Journal of the Korea Concrete Institute, 18(3), pp.355-360. https://doi.org/10.4334/JKCI.2006.18.3.355
  3. Ryu, J. H., Lee, S. D., Lee, S. P., et al., 2009 : A study on alkali-reactivity of aggregates for shotcrete in Korea, Proceedings of the Korea Concrete Institute, 12(1), pp. 333-334.
  4. Hong, S. H., 2014 : Ratio of alkali-aggregate reactivity for aggregates by ASTM C1260 method, Proceedings of the Korea Concrete Institute, 22(1), pp.443-444.
  5. Lee, J. H., Kim, S. W., 1995 : A study on the chemical reaction of crushed aggregates, Proceedings of the Korea Concrete Institute, 7(1), pp.136-144.
  6. Lee, J. D., 2013 : Concrete alkali aggregate reaction diagnosis, Il-kwang, Seoul, pp.3-18.
  7. Yoon, J. H., Jaung, J. D., Lee, Y. S., et al., 1993 : An experimental study on the alkali-silica reactivity of several domestic crushed stones, Architectural Institute of Korea, 13(1), pp.413-416.
  8. Cha, T. H., Cho, W. K., Cho. I. H., et al., 1994 : Experimental study on the application of the rapid test method with using the several domestic crushed stones, Architectural Institute of Korea, 14(2), pp.687-690.
  9. Son, Y. J., Ha, J. D., Um, T. S., et al., 2007 : The Study on the Alkali-Aggregate Reaction Test of KS and the Other Standards, Proceedings of the Korea Concrete Institute, 8(1), pp.605-608.
  10. Yun, K. K., Kim, S. K., Seo, J. H., 2009 : Evaluation for alkali-silica reactivity using chemical method and mortarbar methods, Proceedings of the Korean Society of Civil Engineers, pp.420-423.
  11. JIS A 5308, 2019 : Ready-mixed Concrete, Japanese Standards Association.
  12. ASTM C 1293 - 18a, 2018 : Standard Test Method for Determination of Length Change of Concrete Due to Alkali-Silica Reaction, ASTM International.
  13. Berube, M. A., Fournier, B., 1993 : Canadian experience with testing for alkali-aggregate reactivity in concrete, Cement and Concrete Composites, 15(1), pp.27-47. https://doi.org/10.1016/0958-9465(93)90037-A
  14. JIS A 1145, 2017 : Method of test for alkali-silica reactivity of aggregates by chemical method, Japanese Standards Association.