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Table 6 Variation of California Bearing Ratio values with cement content for Ekenkpon shale soil (28 days soaked)

From: Occurrence of shale soils along the Calabar-Itu highway, Southeastern Nigeria and their implication for the subgrade construction

  0 % Ordinary Portland cement 1 % Ordinary Portland cement 2 % of Ordinary Portland cement 3 % Ordinary Portland cement 4 % Ordinary Portland cement 5 % Ordinary Portland cement
CBR values after soaking (%) 15 10.5 20.5 25.8 49
Water Content before soaking (%) 16.5 18 18.1 18.2 16.1
Water content after soaking (%) 22.9 23.1 22.4 19.1
Maximum dry density (MDD) (kg/m3) 1700 1810 1710 1660
Optimum moisture content (OMC) (%) 16.6 19.8 18.12 18.11