Characteristics study of buton granular asphalt as filling material of column

Abstract

Granular Asbuton is a natural material that occurred millions of years ago. Asbuton is a huge natural asphalt reserve. The bitumen content of Asbuton is located in an inter-mineral cavity that is difficult to remove. If the layer is dug and then obtained Asbuton chunks, the Asbuton remains a unit between the bitumen and the mineral granules, even if it is crushed to a small size, the bitumen and minerals remain united. The proportion of bitumen and minerals in granular Asbuton has basic properties, such as grain size distribution, ability to drain water, compression properties when compressed, shear strength, carrying capacity, and innovation in reducing soil deformation and decline. This study aims to examine the characteristics of physical and mechanical properties, determine the amount of bearing capacity and, evaluate the deformation pattern of asphalt granular column foundation systems. Testing uses SNI and ASTM standards. Based on the results of testing the characteristics of Granular Asbuton obtained the value of qu max = 0.131 kg / cm3, in the conditions of the optimum water content of Proctor. The value of California Bearing Ratio (CBR-Unsoaked) was 1.79%. So from the results obtained, that the use of Granular Asbuton greatly affects the stability of the soil that will be used as the construction material because of this material functions as a binding material from other materials and can be given other activating materials that can increase the bearing capacity.

The effect of carbon dioxide absorption using buton asphalt residue through carbonation on calcium carbonate precipitated efficiency

“…(3) Ammonia (NH4OH) with a pH setting of 11 was added to the mixture of calcined asbuton waste and a strongly acid solution to precipitate calcium carbonate, as shown in the reaction equations ( 4)- (5).…”

“…Additionally, the Buton mineral deposits are generally composed of relatively light minerals that are almost 85% produced from deposits of sea stars. Fe2O3, Al2O3, and SiO2 are a few of the components that alter the hardness of the mineral grains in solid waste [5]. In particular, this solid waste has calcium carbonate content from 76.6% to 79.7 wt.% [6].…”