Stabilisasi Tanah Gambut Dengan Campuran Portland Cement Di Tinjau Dari Nilai California Bearing Ratio (Cbr).

The size peatland Indonesia estimated 20,6 million hectares, or about 10,8 percent of the land area Indonesia. From the area around 7,2 million hectares or 35 % of them are on the island of Sumatra. Because the behavior of peat soil are less favorable to civil engineer so much effort to improve the peat layers in order to become better soil material. The sampling method peat done in the area Sontang Rokan Hulu Riau province, using a percentage addition of portland cement 0%, 2%, 4%, 6%, to obtain the value of CBR testing in doing this study physical properties include testing density, limits consistency, sieving, soil water content, and CBR. Research through laboratory testing refers to the SNI and SKSNI about the properties of these soils. Sontang village in the district of Rokan Hulu Bonai Darussalam obtained design value to get the laboratory CBR CBR value without bathThe test results an average density of peat areas Sontang Rokan Hulu Riau Province amounted to 1,4136 , testing the water content average was 121,17 %, with the liquid limit is 51 % at 25 blows, To sieving using a sieve No. 200 was 66,00 %, on a test proctor standard obtained optimum moisture content of 48,70% of 4 (four) sample testing. Results CBR 0 % = 1.98 gr/cc, 2 % = 2.19 gr/cc, 4 % = 2.18 gr/cc, 6 % = 2.26 gr/cc. CBR value increased at 6 %=2.26g/cc