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http://dx.doi.org/10.7843/kgs.2015.31.10.17

Effect of Particle Breakage on Compaction and Thermal Resistivity of Concrete-based Recycled Aggregates  

Kang, Sungchul (Yujingeo Co., Ltd.)
Kim, Gyeonghun (School of Civil, Environmental and Architectural Engineering, Korea Univ.)
Wi, Jihae (School of Civil, Environmental and Architectural Engineering, Korea Univ.)
Ahn, Taebong (Dept. of Railroad Civil System Engineering Woosong Univ.)
Lee, Dae-Soo (Dept. Chief, Korea Electric Power Research Institute)
Choi, Hangseok (School of Civil, Environmental and Architectural Engineering, Korea Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.31, no.10, 2015 , pp. 17-28 More about this Journal
Abstract
The strict regulations on eco-friendly construction and the significant reduction of natural aggregate resources have raised public concerns on the utilization of recycled aggregates for backfilling a power transmission pipeline trench. In this paper, the particle breakage of concrete-based recycled aggregates and river sand has been experimentally studied during the standard compaction test. The applied compaction energy does not significantly break the river sand particles down, and thus causes no change in the compaction curve, thermal resistivity, and particle gradation characteristics. On the other hand, considerable particle breakage was observed in case of the three recycled aggregates. Such particle breakage leads to enhancing compaction effort, reducing thermal resistivity, and changing particle gradation curve with finer particles that are broken during the first compaction. In addition, particle breakage is more dramatic in lower water contents because pore water may damp down the compaction energy.
Keywords
Recycled aggregate; Compaction; Thermal resistivity; Particle breakage;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Jun, M-H, Lee, S-H, Lee, S-B, and Lee, D-H (2004), "A Study on Quality Investigation of Domestic Recycled Aggregates", Journal of Architectural Institute of Korea, Vol.24, No.1, pp.203-206.
2 KS F 2312 (2001), Test method for soil compaction using a rammer.
3 Lade, P. V., Yamamuro, J. A., and Bopp, P. A. (1996), "Significance of Particle Crushing in Granular Materials", Journal of Geotechnical Engineering, ASCE, Vol.122, No.4, pp.309-316.   DOI
4 Lee, Y., Kwan, Y-W, and Hyun, J-H (2005), "The Engineering and Environmental Properties of Reclaimed Concrete Materials as Road Materials", Journal of the Korean Geo-environmental Society, Vol.6, No.3, pp.17-23.
5 Oh, K. D., Kim, D. H., and Kim, K. Y. (2008), "Characteristics of Thermal Resistivity of Recycled Aggregate on Water Content", Proceedings of 2008 KSCE Conference, pp.3883-3886.
6 Son, Y. H. and Chang, P. W. (2009), "Breakage Index of Weathered Soil Reflecting Breakage Level and Weathering Degree", KSCE Journal of Civil Engineering, Vol.13, No.5, pp.325-332.   DOI   ScienceOn
7 Wi, J., Hong, S-Y, Lee, D-S, Han, E., and Choi, H. (2010), "Laboratory Experiment To Characterize Thermal Properties of Recycled-Aggregate Backfill", Proceedings of 2010 KGS Fall Conference, pp.1231-1238.
8 Wi, J., Hong, S-Y, Lee, D-S, Park, S., and Choi, H. (2011), "Evaluation of Compaction and Thermal Characteristics of Recycled Aggregates for Backfilling Power Transmission Pipeline", Journal of Korean Geotechnical Society (KGS), Vol.27, No.7, pp.17-33.   DOI