Browse > Article
http://dx.doi.org/10.14481/jkges.2017.18.8.23

Evaluation on Weathering Characterization on Rock Types Using Artificial Weathering Test  

Heo, Yeul (Department of Civil Engineering, Chungbuk National University)
Kang, Changwoo (Department of Civil Engineering, Chungbuk National University)
Kwon, Youngcheul (Department of Civil Engineering and Management, Tohoku Institute of Technology)
Bae, Wooseok (NANO-GEO ENC Co. Ltd.)
Publication Information
Journal of the Korean GEO-environmental Society / v.18, no.8, 2017 , pp. 23-32 More about this Journal
Abstract
For exposed slopes, the weathering degree over time has a major effect on the engineering properties of rocks and the slope stability. Rocks are gradually changed by weathering into soil over time, and the resulting physical, chemical and mechanical changes of rocks affect the engineering stability of the slope. However, there are not many ways to objectively evaluate the weathering degree of a slope. In this study, therefore, to investigate the weathering characteristics of rocks, granite, gneiss and shale distributed in the Chungbuk region were sampled by weathering stage and changes in their component minerals and tissues were investigated. Furthermore, artificial weathering was induced using the freezing and thawing test and quantitatively investigated through porosity and absorption rate. In addition, the changes of microcracks due to artificial weathering were evaluated through box fractal dimension ($D_B$). Through mineralogical study the phase change of constituting minerals, the growth of secondary minerals, the development of micro-cracks and the fabric changes due to weathering were observed. The mineralogical, chemical and engineering evaluations of the weathering degree through the experimental results in this study are expected to be useful for analyzing the weathering characteristics and causes by rock type and for proposing a methodology to evaluate the degradation of physical properties comparatively and quantitatively.
Keywords
Weathering degree; Artificial weathering; Box fractal dimension; Rock type;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Bae, W. S., Kim, K. S., Sun, B. I., Lee, B. W. and Ann, B. C. (2010), A case study on weathering sensitivity analysis at sang-ju area, The proceeding of Korean Society of Civil Engineers, Vol. 2010, pp. 2200-2203 (in Korean).
2 Choi, E. K. (2011), A study on the chemical index of alteration (CIA) and geotechnical properties of igneous rocks by weathering, PhD. dissertation, Pusan University, pp. 1-199 (in Korean).
3 Crosta, G. (1998), Slake durability vs Ultrasonic treatment for rock durability determinations, International Journal of Rock Mechanics and Mining Sciences, Vol. 35, No. 6, pp. 815-824.   DOI
4 Goldich, S. S. (1938), A study in rock weathering, Journal of Geology, Vol. 46, pp. 17-58.   DOI
5 ISRM (1981), Rock characterization, Testing and Monitoring. In: Brown ET(ed) Suggested methods. Pergamon Press, Oxford, 211p.
6 Kang, C. W., Kim, B. S., Son, K. R. and Bae, W. S. (2016), Evaluation about weathering characteristics of granite at sangju area, The Journal of Korean Geo-Environmental Society, Vol. 17, No. 5, pp. 17-25 (in Korean).
7 Kim, Y. H. and Hong, S. H. (1990), A quantitative study on the variational features of rock properties followed by weathering in granites, Journal of korean Instruction mining Geology, Vol. 23, No. 2, pp. 221-232 (in Korean).
8 Lee, S. B. (2008), Weathering mechanism and degradation of physical property of hallasan trachyte in Jeju island, PhD. dissertation, Pukyung University, pp. 1-205 (in Korean).
9 Lee, S. G. (1993), Weathering of granite, Journal of the Geological Society of Korea, Vol. 29, No. 4, pp. 396-413 (in Korean).
10 Park, J. J. (2015), Mechanical characteristics of pohang area mudstone as material for reclamation material, PhD. dissertation, Joongbu University, pp. 1-143 (in Korean).
11 Pollard, D. D. and Aydin, A. (1988), Progress in understanding jointing over the past century, Geol. Soc. of Am. Bull., 100, pp. 1181-1204.   DOI
12 Reiche, P. (1950), A survey of weathering processes and products, University of new mexico press, Albuquerque, pp. 1-95.
13 Ryu, S. H. and Song, J. J. (2012), Weathering of rock specimens exposed to recurrent freezing and thawing cycles, Vol. 22 No. 4, pp. 276-283 (in Korean).   DOI