Report No. : GEO Report No. 373

Report Title : Study on the Applicability of the Hilf Method for Compaction Control in Hong Kong (2024), 36 p.

Author : F.L.F. Chu & P.W.K. Chung

Abstract

This Report presents a review of the applicability of the Hilf method in compaction control based on the results of 102 field trials and 271 pairs of results conducted in public works projects. The results show that there is a reasonably good correlation between "degree of compaction" from the Hilf method and sand replacement test. There is no significantly difference in the "deviation from optimum water content" determined from the Hilf method and conventional oven drying method. The potential sources of error of the Hilf method leading to uncertainties of test results have been reviewed with precautionary measures suggested. The findings of the review suggested that the Hilf method can provide an alternative option for density control and water content control in compaction works should quick results be required.

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