International Journal of Highway Engineering (한국도로학회논문집)

Korean Society of Road Engineers (한국도로학회)
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The Effect of the Residual Mortar of Recycled Concrete Aggregate on Alkali Silica Reaction

순환/재생골재의 잔류 모르타르 성분이 알칼리 실리카 반응성에 미치는 영향 평가

  • 김정현 (한국기술교육대학교 건축공학부) ;
  • 김남호 (한국기술교육대학교 건축공학부) ;
  • 양성철 (홍익대학교 건축공학부)
  • Received : 2015.03.30
  • Accepted : 2015.08.04
  • Published : 2015.08.17
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Abstract

PURPOSES : The objective of this study is to evaluate the effect of the residual mortar of recycled concrete aggregate on the expansion behavior during alkali silica reaction (ASR). METHODS: In order to evaluate the net effect of residual mortar on ASR expansion behavior, two aggregate samples with the same original virgin aggregate source but different residual mortar volumes were used. ASTM C1260 test was used to evaluate the ASR expansion behavior of these two aggregates and the original virgin aggregate. RESULTS: The greater the amount of residual mortar in recycled concrete aggregates, the less is the induced ASR expansion. Depending on the amount of residual mortar in recycled concrete aggregate, the ASR expansion of recycled concrete aggregate may be less than half of that of the original virgin aggregate. CONCLUSIONS: The residual mortar of recycled concrete aggregate may lead to the under estimation of the ASR expansion behavior of the original virgin aggregate.

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References

  1. Abbas, A., Fathifazl, G., Isgor, O. B., Razaqpur, A. G., Fournier, B., Foo, S. (2007), "Proposed Method for Determining the Residual Mortar Content of Recycled Concrete Aggregates." Journal of ASTM International, Vol. 5, No. 1.
  2. ASTM C-1260 (2007), Standard Test Method for Potentially Alkali reactivity of Aggregates(Mortar-Bar method), American Society for Testing and Materials.
  3. Fathifazl, G., Abbas, A., Razaqpur, A. G., Isgor, O. B., Fournier, B., Foo, S. (2009), "New Mixture Proportioning Method for Concrete Made with Coarse Recycled Concrete Aggregate." JOURNAL OF MATERIALS IN CIVIL ENGINEERING, Vol. 21, No. 10.
  4. Yang, S. C., Lee, H. U., Kim, N. (2015), "Measurement for Coefficient of Thermal Expansion of Concretes Made with Recycled Concrete Aggregates" International Journal of Highway Engineering, Vol. 17, No. 1, 2015, pp. 7-16. https://doi.org/10.7855/IJHE.2015.17.1.007
  5. Yun, K. K., Hong, S. H., Han, S. H. (2008), "Expansion Behavior of Aggregate of Korea due to Alkali-Silica Reaction by ASTM C 1260 Method" Journal of the Korea Concrete Institute, Vol. 20, No. 4, pp. 431-437. https://doi.org/10.4334/JKCI.2008.20.4.431

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