Compacted Lateritic Soil Treated With Cement Kiln Dust As Hydraulic Barrier Material

摘要

The paper evaluates the suitability of lateritic soil treated with up to 10% cement kiln dust (CKD)by dry weight of soil for the construction of waste containment facilities. Laboratory tests werecarried out on specimens prepared at molding water contents -2, 0, +2 and +4% of the optimummoisture content and compacted with British Standard heavy, BSH (modified Proctor) energy.Index, hydraulic conductivity, volumetric shrinkage and unconfined compression tests werecarried out. Results obtained show improvement in index properties with CKD treatment.Regulatory criteria of maximum hydraulic conductivity (k) value of 1 × 10~(-9) m/s, minimumunconfined compressive strength (UCS) of 200 kN/m2 and maximum volumetric shrinkage strain(VSS) of 4% were satisfied with a minimum 7.5% CKD treatment. The overall acceptable zonefor the treated soil was achieved with 10% CKD treatment for specimens prepared at moldingwater content range of 13.5 – 21.3%.