Abstract
Some instability problems were found on natural or engineered slopes mostly lying on Subang claystones. The instability problems included excessive erosion, slumps and rock falls. The field performance surveys of the problems suggested that the claystones physically weather rapidly so that the rock properties they exhibit during excavation often change to properties with a more characteristic of soil. Such a phenomenon is generally known as a slaking process. In order to gain better understanding about the slaking of Subang claystones, a series of experimental laboratory studies were carried out involving a modified slaking index test. Claystone samples used in this study were obtained from their exposures along the Northern West Java area of Indonesia. Petrographic analysis was correspondingly performed to identify mineral and texture/fabric, and in turn, to determine the inherent factors of the rocks which might affect the slaking process. The stssudy results indicated that the claystones were characterized by high to very high slaking properties having a maximum slaking index (Is) of 57.4% and a mean Is of 43.8%. Major dispersion slaking on sample surfaces and high cracking in response to excessive swelling were recognized as main slaking modes within the claystones. All samples lose progressively less material through the five wet–dry cycles of a slaking index test, indicating a decelerated slaking rate. It was evident that the main inherent factors controlling the slaking process were expandable clay mineral smectite, non-clay mineral pyrite and soluble mineral calcite. Moreover, a quite important of inherent bonding material and stress release energy in the slaking characteristics of the claystones was revealed by a closure phase of an initial hairline crack during unloading.
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References
E. Broch J.A. Franklin (1972) ArticleTitleThe point load strength test International Journal of Rock Mechanics and Mining Sciences 9 669–697
H. Cetin M. Laman A. Ertunc (2000) ArticleTitleSettlement and slaking problems in the world’s fourth largest rock-fill dam, the Ataturk Dam in Turkey Engineering Geology 56 IssueID3–4 225–242
M.A. Czerewko J.C. Cripps (2001) ArticleTitleAssessing the durability of mudrocks using the modified jar slake index test Quarterly Journal of Engineering Geology and Hydrogeology 34 IssueID2 153–163
Darman, H. and Sidi, F.H. (2000) An Outline of the Geology Indonesia, Indonesian Association of Geologists, 192 pp
J.D. Dick A Shakoor (1995) Characterizing durability of mudrocks for slope stability purposes W.C. Haneberg S.A. Anderson (Eds) Clay and Slope Instability NumberInSeries10 Geological Society of America Reviews in Engineering Geology Colorado 121–130
Djuhaeni S. Martodjojo (1989) ArticleTitleStratigraphy of Majalengka area and its relationship to lithostratigraphy sequence of Bogor trough Geology Indonesia 2 IssueID1 227–252
J.A. Franklin R. Chandra (1972) ArticleTitleThe slake-durability test International Journal of Rock Mechanics and Mining Sciences & Geomech. Abstr. 9 325–341
J.I. Goldstein D.E. Newbury P. Echlin (1984) Scanning Electron Microscopy and X-ray Microanalysis Plenum Press New York
S. Hillier (2000) ArticleTitleAccurate quantitative analysis of clay and other minerals is Sandstone by XRD: Comparison of a Rietveld and a reference intensity ratio (RIR) method and the important of sample preparation Clay Minerals 35 291–302
M. Ichinose K. Matsui (1989) ArticleTitleWater-durability of coal measure rocks Journal of Soil and Foundation 37–4 IssueID375 43–47
Irsyam, M., Tami, D. and Sadisun, I.A. (1999) Solving landslide problem in shale cut slope in the construction of the valve chamber of the Tulis hydroelectric power, In: Proc. ‘99 Japan–Korean Joint Symp. on Rock Engineering, Japan, pp. 217–224
ISRM (1981) Rock Characterization Testing & Monitoring, ISRM Suggested Methods, E.T. Brown (ed.), Pergamon Press, Oxford, 211 pp.
InstitutionalAuthorNameJCPDS (1993) Mineral Powder Diffraction File Databook: Search Manual for Selected PDF for Minerals Joint Committee on Power Diffraction Standards Swarthmore, PA
H.P. Klug L.E. Alexander (1974) X-Ray Diffraction Procedures EditionNumber2 Wiley New␣York
Martodjojo, S. (1984) The evolution of Bogor Basin, West Java, Ph.d. thesis, Bandung Institute of Technology, Indonesia (in Indonesian)
Matsui, K. and Shimada, H. (1994) Some factors influencing on stability of longwall gateroad, In: Proceedings of 13th Intl. Conf. on Ground Control in Mining, Morgantown, West Virginia, pp. 43–49.
D.M. More R.C. Reynolds SuffixJr (1997) X-Ray Diffraction and the Identification and Analysis of Clay Minerals EditionNumber2 Oxford University Press New York
N.R. Morgenstern K.D. Eigenbrod (1974) ArticleTitleClassification of argillaceous soils and rocks Journal of the Geotechnical Engineering Division, ASCE 101 1137–1156
Park, H.D., Lee, J.Y. and Chang, Y.S. (2000) The use of slake durability as an indicator of slope stability of weathered rock, In: Proceedings of 4th North American Rock Mech. Symp. (NARMS), pp. 497–499
Sadisun, I.A. and Matsui, K. (1999) Engineering grades in claystone of Upper Subang Formation and their effect on some changes of engineering properties, In: Proceedings of ’99 Japan–Korean Joint Symp. on Rock Engineering, Japan, pp. 387–394
Sadisun, I.A., Shimada, H. and Matsui, K. (2001) Determination of strength degradation of Subang Formation claystone due to weathering, In: Proceedings of 3rd Asian Symposium on Engineering Geology and the Environment, Indonesia, pp. 37–46
Sadisun, I.A., Shimada, H. and Ichinose, M. (2002a) Evaluation of physical deterioration slake-prone rocks subjected to static slaking test, In: Proceedings of 11th Japan Symposium on Rock Mechanics (CD-ROM), Japan, Paper No. E-01
Sadisun, I.A., Shimada, H. and Ichinose, M. (2002b) Improved procedures for evaluating physical deterioration of argillaceous rocks, In: Y. Lim, C. Tang, X. Feng and S. Wang (eds.), Proceedings of 2nd Intl. Conf on New Development in Rock Mech. and Rock Eng., P. R. China, Rinton Press, pp. 36–39
Santi, P.M. and Koncagul, E.C. (1996) Predicting the mode, susceptibility and rate of weathering of shales, In: G. Matheson (ed.), Design with residual materials, geotechnical and construction considerations, American Society of Civil Engineers Geotechnical Special Publication, New York, No. 63, pp. 12–26
P.M. Santi (1998) ArticleTitleImproving of jar slake, slake index, and slake durability tests for shales Environmental & Engineering Geoscience 6 IssueID3 385–396
L.E. Wood P. Deo (1975) ArticleTitleA suggested system for classifying shale materials for embankments Bull. Int. Assoc. Eng. Geol. 12 39–55
R.A.J. Wust J. McLane (2000) ArticleTitleRock deterioration in the Royal Tomb of Set I, Valley of Kings, Luxor, Egypt Engineering Geology 58 IssueID2 163–190
Venter, J.P. (1981) Free swell properties or some South African Mudrocks, In: Proceedings of Int. Symp. on Weak Rock, Vol. 1, Balkema, Amsterdam, pp. 233–242
H. Van Olphen (1991) An Introduction to Clay Colloid Chemistry: For Clay Technologists, Geologists, and Clay Scientists EditionNumber2 Krieger Publishing Company Malabar Florida
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Sadisun, I., Shimada, H., Ichinose, M. et al. Study on the physical disintegration characteristics of Subang claystone subjected to a modified slaking index test. Geotech Geol Eng 23, 199–218 (2005). https://doi.org/10.1007/s10706-003-6112-6
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DOI: https://doi.org/10.1007/s10706-003-6112-6