Browse > Article
http://dx.doi.org/10.7843/kgs.2017.33.12.35

A Study on Crushing and Engineering Characteristics Caused by Compaction of Recycled Aggregates  

Park, Sung-Sik (Dept. of Civil Eng., Kyungpook National Univ.)
Chen, KeQiang (Dept. of Civil Eng., Kyungpook National Univ.)
Lee, Young-Jae (Dept. of Civil Eng., Kyungpook National Univ.)
Moon, Hong-Duk (Dept. of Civil Eng., Gyeongnam National Univ. of Science and Technology)
Publication Information
Journal of the Korean Geotechnical Society / v.33, no.12, 2017 , pp. 35-44 More about this Journal
Abstract
A large amount of recycled aggregates was produced and crushed from old buildings and pavements. In this study, when these aggregates are re-used in subbase or subgrade materials in near construction sites, their engineering characteristics caused by crushing are investigated in terms of permeability and shear strength. Three different sizes of aggregates (31.5-45.0 mm, 19.0-31.5 mm, 9.5-19.0 mm) and their mixtures, a total of 7 types of aggregates were used in compaction tests (modified D and B methods). After compaction tests, aggregates were sieved and analyzed with four different breakage factors ($B_{15}$, $C_c$, $B_{10}$, $B_r$). The D compaction method gave 2.0-8.0 times more crushable than B compaction method. The breakage factors for the largest size aggregate was 1.4-3.0 times higher than those of the smallest size aggregate. For aggregates with 5.6-9.5 mm sizes, the samples were prepared with $B_{15}$ of 1, 3, 10, 20, 30, 50, 60, and 70 for permeability and direct shear tests. As $B_{15}$ increased, the hydraulic conductivity decreased up to 1/22 for $B_{15}=50$. As $B_{15}$ increased from 1 to 50, the peak friction angle increased from $46.1^{\circ}$ to $54.5^{\circ}$. On the other hand, the friction angle decreased after $B_{15}=60$.
Keywords
Recycled aggregate; Crushing; Breakage factor; Hydraulic conductivity; Friction angle;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 Shin, J. L., Kim, W. S., Baek, S. M., Kang, H. K., and Kwak, Y. K. (2015), "Structural Performance Evaluation of Steel Fiber-Reinforced Concrete Beams with Recycled Coarse Aggregates", Journal of the Korea Concrete Institute, Vol.27, No.3, pp.215-227.   DOI
2 Lee, J., Lee, B. C., Cho, Y. G., and Jung, S. H. (2016), "Chloride Diffusivity of Concrete using Recycled Aggregate by Strength Levels", Journal of the Korea Institute of Structural Maintenance and Inspection, Vol.20, No.2, pp.102-109.   DOI
3 Ministry of Environment (2014), "Notification of No. 33, the Purpose of Use and Compulsory Quantity of Recycled Aggregates and Recycled Goods for the Compulsory Usage Construction with Recycled Aggregates".
4 Ministry of Land, Infrastructure and Transport (2013), "Quality Standards for Recycled Aggregates".
5 Ministry of Land, Transport and Maritime Affairs (2011), "Compaction Control Criteria on the Pavement Substructure".
6 Park, S.S. (2000), "Bearing behavior of Crushable Volcanic Soils", Master Thesis, Tokyo Institute of Technology.
7 Park, S. S., Kim, S. J., and Moon, H. D. (2016), "Crushing Characteristics of Single Particle of Recycled Aggregate from Waste Concrete", Journal of the Korean Geotechnical Society, Vol.32, No.12, pp.23-32.   DOI
8 KS F 2312 (2016), Standard method for soil compaction using a rammer.
9 Datta, M., Gulhati, S. K., and Rao, G. V. (1979), "Crushing of Calcareous Sands during Shear", Proc. 11 th Offshore Technology Conf. Houston, pp.1459-1467.
10 Hardin, B. O. (1985), "Crushing of Soil Particles", Journal of Geotechnical Engineering, Vol.111, No.10, pp.1177-1192.   DOI
11 Hazen, A. (1930), "Water Supply", in American Civil Engineer Handbook, Wiley, New York.
12 Kim, S. J. (2017), "A Study on the Crushing Properties of Recycled Aggregated from Waste Concrete", Ph.D thesis, Kyungpook National University.
13 Kim, Y. J. (2014), "Quality Assessment of Recycled Aggregate Concrete Using Microscopic Studies", Ph.D thesis, Hanyang University.
14 Lee, K. L. and Farhoomand, I. (1967), "Compressibility and Crushing of Granular Soils in Anisotropic Traixial Compression", Canadian Geotechnical Journal, Vol.4, No.1, pp.68-99.   DOI
15 KS F 2343 (2007), Testing method for direct shear test of soils under consolidated drained conditions.
16 Lade, P. V., Yamamuro, J. A., and Bopp, P. A. (1996), "Significance of Particle Crushing in Granular Materials", Journal of Geotechnical Engineering, Vol.122, No.4, pp.309-316.   DOI
17 Lee, W. K., Choi, J. O., and Jung, Y. W. (2015), "Effect of the Amount of Attached Mortar of Recycled Aggregates on the Properties of Concrete", Journal of Korean Recycled Construction Resources Institute, Vol.3, No.2, pp.132-139.   DOI