Abstract
Soil is the fundamental material that is extremely as the place of establishment of a structure or construction, both building and road constructions. However, not all soil is well used in the constructions field, as there are several types of soil that are problematic in terms of both the soil bearing capacity and deformation. The clay with carrying capacity and low shear strength needs to stabilized in order to meet the technical requirements to be used as sub grade. The add materials that are typically used for soil stabilization are cement, lime or a mixture of two or three of the added materials. In this study, the added material use volcanic ash of Mount Sinabung at North Sumatera and sugarcane bagasse ash. The purpose of this study was to determine an index value of properties as the result of the addition of 4% volcanic ash and variations in content of bagasse ash on clay and then to determine the compressive strength for maximum testing UCT (Unconfined Compression Test) and understand the value of CBR (California Bearing Capacity) as the consequence of the addition of a stabilizing agent, as well as optimum level of addition of bagasse ash. The result showed that the original soil sample has the water content 12.35%, specific gravity of 2.65, liquid limit of 46.73% and plasticity index of 26.44%. The compressive strength value of 1.38 kg/cm 2 . Base on the USCS classification, the soil sample including the type CL while base on AASHTO classification, soil samples are include this A-7-6 type. After the soil is stabilized with a wide variety of sugarcane bagasse ash content value obtained the largest unconfined compression test in 4% addition level volcanic ash + 10% sugarcane bagasse ash is equal to 5.1kg/cm 2 and the result California Bearing capacity value on the optimal mix of 4% volcanic ash + 4% sugarcane bagasse ash is equal to 13.91%.
Highlights
The entire buildings are closely related to the soil, because the soil can be used as building material and as foundation of a building establish
The purpose of this study is to understand the physical characteristic of the original soil, knowing the influence of the addition of volcanic ash and sugarcane bagasse ash towards the soil stability and to discover the optimum mixture which contributes to the value of the Unconfined Compression Test (UCT) and the largest California Bearing Capacity (CBR) value in the clay with is stabilized with volcanic ash and sugarcane bagasse ash
2.1 Preparation work Finding the literature that are related to the clay that is stabilized, about volcanic ash and sugarcane bagasse ash and the literature regarding the Unconfined Compression Test (UCT) and California Bearing Ratio (CBR)
Summary
The entire buildings are closely related to the soil, because the soil can be used as building material and as foundation of a building establish. Clay is one type of soil that is frequently stabilized This is due the clay is very hard in dry condition and more plastic on medium level of water content, but water content level is high, the clay will be cohesive and very soft, cause large volume change due the influence of water and prompts the soil to expand and swelling in a relative short period of time. This characteristic is the one that becomes the reason of the necessary of the stabilization process, so that it can be corrected in order to increase to carrying capacity of the soil [1, 2, 4]
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