Improvement of the bearing of soil by using lime – rice husk ash

ABSTRACT: Rice husk ash is a potential pozzolanic material that can be used for stabilizing agent in the mixture with lime. This paper presents the results of studies in the use of rice husk ash (RHA), yield from rice husk combustion in Yogyakarta -Indonesia, to improve the bearing of soft soil. Laboratory tests have been conducted in this study, such as index properties, compaction, and California Bearing Ratio (CBR) tests. The results of the study show that lime and RHA can increase the bearing capacity of the subgrade. The bearing of treated soils with lime -RHA mixture enhanced multiplies associated with curing time. On the other side, the swell of expansive soil decreased to relatively nonswelling

Influence of Plastic Waste Fibers on the Strength of Lime-Rice Husk Ash Stabilized Clay Soil

A study has been undertaken to investigate the strength of stabilized clay-soil reinforced with randomly distributed discrete plastic waste fibers by carrying out unconfined compressive strength and tensile-split strength test. In this study, the clay soil was stabilized with lime and rice husk ash mixtures. The effect of the fiber length and content on the compressive and split tensile strength was investigated. The laboratory investigation results show that inclusion of the plastic waste fiber increased significantly both the unconfined compressive strength and tensile-split strength of the stabilized clay soil. The fiber length plays a significant contribution in increasing the soil strength. To contribute for any significant improvement on compression as well as tensile strength, the fiber length should be in range of 20 mm to 40 mm. Fiber reinforcements also reduced soil brittleness by providing smaller loss of post-peak strength