FIELD ASSESSMENT OF ROCK STRENGTH BY IMPACT LOAD TEST
DOI:
https://doi.org/10.11113/mjce.v23.15813Keywords:
Surface hardness, Weathered rock, Schmidt Hammer Test, Impact Load TestAbstract
This paper introduces a new testing method for field determination of Index strength of rock mass. The method was developed as an alternative test in cases when difficulties were encountered by conventional Schmidt Hammer to determine the index strength of weak or weathered rock. This note explains the basic concept and the procedure of impact load test as an alternative way to determine the index strength of weak or highly weathered rock. A standard chart was developed for interpretation of impact load test through verification study on weathered granite.References
American Society for Testing Materials (2005) ASTM D5873 - 05 Standard Test Method for Determination of Rock Hardness by Rebound Hammer Method ASTM International, West Conshohocken, PA.
Anon (1977). The Description of Rock Masses for Engineering Purposes. Engineering Group Working Party Report. Quarterly Journal of Engineering Geology, 10, 355-388.
Dearman, W. R. (1974). Weathering Classification in the Characterization of Rock for Engineering Purposes in British Practice. Bulletin of International Association of Engineering Geology. 9:33-42.
Deere, D.U., and Miller, R.P. (1966). Engineering Classification and Index Properties for Intact Rock. Tech. Rept No. AFWL-TR-65-116, Air Force Weapons Ltd. Kirtland Air Force Base, New Mexico.
Hencher, S.R., & Martin, R.P. (1982). The Description and Classification of Weathered Rocks in Hong Kong for Engineering Purposes. Proceedings of 7th South-east Asian Geotechnical
Conference. Hong Kong, 1:125-142.
Hucka, V. (1965). A Rapid Method of Determining the Strength of Rock In-situ. Intenational Journal Rock Mechanics and Mining Science 2:127-34.
Ibrahim Komoo (1995). Weathering as an Important Factor in Assessing Engineering Properties of Rock Materials. Proc. GSM Forum on Soil and Rock Properties. Kuala Lumpur. 31-35.
International Society of Rock Mechanics (1981). Rock Characterization Testing and MonitoringInternational Society of Rock Mechanics Suggested Methods, E.T. Brown ed. Pergamon Press, Oxford.
Little, A.L. (1969). Engineering Classification of Residual Tropical Soils. Proceedings of the 7th International Conference on Soil Mechanics and Foundation Engineering Mexico, 1, 1-10.
Look, B. (2007). Handbook of Geotechnical Investigation and Design Tables. AK Leiden, Netherlands. Taylor and Francis Group.
