EFFECT OF FLY ASH TO IMPROVE CLAYSTONE CHARACTERISTIC AS ALTERNATIVE EMBANKMENT MATERIAL

Abstract

According to Data Project Construction TPA Regional Banjarbakula, in project location found Claystone material more than 8000 m3. Based on initial testing of physical dan mechanical characteristic Claystone obtained result that CBR and Plasticity Index not fulfill embankment material spesification. So it can not utilized as embankment material. The use of coal fuels in power plants and industries including the Asphalt Mixing Plant (AMP) unit leaves a lot of coal ash waste and becomes a problem for the environment. This research attemps to know combination of soil, Claystone and Fly Ash which can be used as a mixture of embankment so make soil characteristic better. In this research done soil testing of physical and mechanical charateristic Soil, Claystone, and Fly Ash by making three types of mixtures, Mixture Type A composed by Claystone 60%, Fly Ash 10%, and Soil 30%. Mixture Type B composed by Claystone 50%, Fly Ash 20%, and Soil 30%. Mixture Type C composed by Claystone 40%, Fly Ash 30%, and Soil 30%. Based on testing result of three mixtures obtained its CBR and PI value not fulfilled embankment spesification, that CBR value minimum 6%. From three mixtures above, Mixture Type B potential to be alternative embankment material due to biggest improvement of CBR and PI value. CBR improve to 4,5% and PI to 16,31.