A study of the weathering of the bukit timah granite part a: Review, field observations and geophysical survey

J. Zhao, B. B. Broms, Y. Zhou, V. Choa

Research output: Contribution to journalReview ArticleResearchpeer-review

41 Citations (Scopus)


The Bukit Timah granite exhibits a full range of weathering grades. Examination of these exposures shows that the weathering has been rapid. Field observations and geophysical surveys show that the rock has been weathered up to 70 meters depth, and that the main mechanisms of weathering is chemical decomposition. The humid tropical condition in Singapore with high annual precipitation has produced secondary weathering of the residual soil. The weathering profiles suggest that the weathering of the Bukit Timah granite is stratified with weathered layers and a sharp boundary between the residual soil and the slightly to moderately weathered granite. This paper (Part A) is a review of current weathering classification systems for weathered rock. Some results from field observations and geophysical surveys are also presented in the paper. A weathering classification and determination method is proposed for the Bukit Timah granite. Results from field and laboratory investigations of the weathering of the granite and material properties will be presented in Part B.

Original languageEnglish
Pages (from-to)97-106
Number of pages10
JournalBulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur
Issue number1
Publication statusPublished - 1 Apr 1994
Externally publishedYes

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