Pemanfaatan Batu Kuning (Dolomite Limestone) Sebagai Bahan Subbase Course Jalan Ditinjau Dari Besarnya Nilai Kv Pada Pengujian Heavy Compaction Dan Cbr Dalam Kondisi Unsoaked

Oleh :
Muh Ristanto - I1106045 - Fak. Teknik

Dolomite limestone are taken in the village of Soko Miri district of Sragen regency is the first step of of utilization of dolomite limestone as subbase course road materials. This research aims to analyze the material characteristics of dolomite limestone, determining the variations of design subbase course material in the form of dolomite limestone with addition sand and gravel, and analyzing large percentage of CBR unsoaked and the value kv by using dolomite limestone materials as well as the option of adding aggregate sand and gravel as research material. This research uses an experimental method with a total of 96 test specimens consisting of dolomite limestone, dolomite limestone + sand, dolomite limestone + gravel , dolomite limestone gravel + sand. The sample consisted of four variations of the mixture, 5 variations of 0ml addition of water, 50ml, 100ml, 150ml, 200ml in each test specimen for the heavy compaction test conducted in accordance with British standards, then taken the maximum value of each sample to be tested the variation of mixing CBR unsoaked based on laboratory procedures in accordance with British standards. To determine the value of modulus of subgrade reaction (kv) do approach between relationship unsoaked CBR value and the value modulus of subgrade reaction (kv). In modified Proctor test all the variations available water content (w) and dry weight content (d) the highest in D3 variation of 33.30% (3 / 4 ", 3 / 8", 4, 8, 40, and 200 ) yellow stone (dolomite limestone), 33.30% gravel (3 / 8 ") and 33.30% sand (10) obtained wopt = 6.718% and d max = 3.003 gr/cm3 addition water in 150 ml. Whereas the lowest variation B2 consisting of 75% (3 / 4 ", 3 / 8", 4, 8, 40, and 200) of yellow stone (dolomite limestone) and 25% sand (10) obtained wopt = 6.030% and d max = 2.260 addition gr/cm3 in 150 ml of water. This study shows that the highest unsoaked CBR value at all the variations of 73.69%, consisting of 50% (3 / 4 ", 3 / 8, and 4) the yellow stone (dolomite limestone) and 50% (8, 40, and 200 ) yellow stone (dolomite limestone) or the variation of A1, while the lowest was 22.73 for all variations of 25% (3 / 4 ", 3 / 8, 4, 8, 40, and 200) of yellow stone (dolomite limeston ) and 75% (1 / 2 ", 3 / 8", and 4) gravel. Modulus of subgrade reaction (kv) the highest in all variations of kN/m2.m-1 186604,24, while the low of 73384,54 kN/m2.m-1. Keywords: dry density, CBR soaked and kv value