STRENGTH CHARACTERISTICS OF COARSELY - GRADED SOIL AT HIGH CONCENTRATIONS OF EMC2 STABILIZE

• Main Author: Taufiq Oesman, Muhammad
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/2883
• Institution: Institut Teknologi Bandung

STRENGTH CHARACTERISTICS OF COARSELY-GRADED SOIL AT HIGH CONCENTRATIONS OF EMC2 STABILIZER, M. TAUFIQ OESMAN HAMID, 1996, Program Magister Sistem dan Teknik Jalan Raya, Program Pascasarjana, Institut Teknologi Bandung. Compaction and strength tests were undertaken on soils taken from 3 locations in Palembang and from one location in West Java. The soils from Palembang - Semen Api (A), Pasir Merah (B) and Pasir Batu (C) - are classified as coarsely-graded soils; the soil from West Java (Cikalong) is classified as fine-graded. Soils A, B and C from Palembang are classified, according to USCS, as SC,SM and SC respectively, the Cikalong soil is classified as SC. Test were carried out on the natural soils and on the soils treated with EMC2, a biocatalyst stabilizer produced in the USA. Dilution ratios (parts by volume of EMC2 : parts by volume of water) of 1:10, 1:15, 1:30 and 1:45 and curing times of 1,3,7 and 14 days were investigated. Strength was evaluated in term of soaked CBR and soaked Dynamic Cone Penetrometer (DCP) Number, DN. Treated samples were cured prior to soaking. The results indicate that soil dry density is not increased by the addition of EMC2. The dry densities of treated soils B and C immediately after compaction was not affected by the curing/soaking process; in the case of soil A the dry density after curing/soaking was somewhat higher than that immediately after compaction. A consistent trend between strength development and dilution ratio/curing time was not apparent for any of the soils investigated. In a number of cases the strength of treated material was lower than that of untreated material. Poor correlation was also observed between the procedures used to evaluate strength i.e. the combination of dilution ratio and curing time that indicated maximum strength in terms of DCP Number did not generally give maximum CBR