AN APPROACH FOR ASSESSEMENT OF COMPACTION CURVES OF SOILS AT VARIOUS ENERGIES USING A ONE POINT TEST

Abstract

Abstract

Compaction curves from nine fine-grained and sixteen coarse-grained soils, which cover all soiltypes classified by the Unified Soil Classification System (USCS) are analyzed to develop the Ohioûscompaction curves. For all tested soils, at a particular compaction energy, the relationships betweenwater content (w) and degree of saturation (S) are represented by power function, which arew = Ad SBd and w = Aw SBw for the dry and the wet sides of optimum, respectively (where Ad, Aw, Bdand Bw are constant). It is found that the compaction curves of all tested soils follow the Ohioûscompaction curves. Based on this findings, Modified Ohioûs curves are introduced for both fineand coarse-grained soils under compaction energy levels of 296.3, 1346.6 and 2693.3 kJ/m3 whichare equal to the energy of half standard, half modified and modified Proctor energies. The modifiedOhioûs curves are useful in rapid estimation of laboratory compaction curves from a single setdata of dry unit weight and water content.

Keywords: Compaction curve; compaction energy; fine-grained soils; coarse-grained soil; modified Ohioûs curves