The effects of carbide column to swelling potential and Atterberg limit on expansive soil with column to soil drainage

International Conference on Eco Engineering Development 2017

生态环境科学

Rifa'I, Alfian Muamar^1 ; Setiawan, Bambang^1 ; Djarwanti, Noegroho^1

Civil Engineering Department, Sebelas Maret University, Central Java, Surakarta, Indonesia^1

关键词: Atterberg limits;    Column spacings;    Expansive soils;    Plasticity indices;    Shrinkage index;    Soil drainage;    Swelling potential;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/109/1/012030/pdf
DOI  :  10.1088/1755-1315/109/1/012030

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The expansive soil is soil that has a potential for swelling-shrinking due to changes in water content. Such behavior can exert enough force on building above to cause damage. The use of columns filled with additives such as Calcium Carbide is done to reduce the negative impact of expansive soil behavior. This study aims to determine the effect of carbide columns on expansive soil. Observations were made on swelling and spreading of carbides in the soil. 7 Carbide columns with 5 cm diameter and 20 cm height were installed into the soil with an inter-column spacing of 8.75 cm. Wetting is done through a pipe at the center of the carbide column for 20 days. Observations were conducted on expansive soil without carbide columns and expansive soil with carbide columns. The results showed that the addition of carbide column could reduce the percentage of swelling by 4.42%. Wetting through the center of the carbide column can help spread the carbide into the soil. The use of carbide columns can also decrease the rate of soil expansivity. After the addition of carbide column, the plasticity index value decreased from 71.76% to 4.3% and the shrinkage index decreased from 95.72% to 9.2%.