Expansion Potential and Plasticity Index Value of Expansive Soil Stabilization with Vermiculite and Bledug Kuwu Mud

DOI

10.2991/aer.k.201221.079How to use a DOI?

Keywords

Expansive clay, stabilization, plasticity index, vermiculite, Bledug Kuwu mud

Abstract

The construction and operation of road infrastructure in Indonesia are facing the damage of flexible pavement. One of the causes of the damage is the failure of the subgrade bearing capacity. The pavement structure requires a large amount of material, especially natural materials namely aggregate and asphalt which are included in the available non-renewable material category which quantity is limited in nature. One type of soil that is widely found in Indonesia is expansive clay. This type of soil often causes problems in the performance of the pavement structure. Expansive soil has large swelling and shrinkage properties and its behavior is greatly influenced by water; thus, when the soil is swelling, irregular waves appear on the expanded road surface above the ground. Previous research showed that mixing additives into expansive soil (cement, lime, fly ash) increased the shear strength of the soil and reducing the potential for soil shrinkage. Vermiculite can absorb water and Bledug Kuwu mud contains almost the same chemicals as fly ash and also contains Calcium Oxide such as lime. Therefore, it is necessary to conduct research to determine the effect of adding vermiculite and Bledug Kuwu mud on the plasticity behavior and shrinkage of the soil mixture. The vermiculite mixture used was 4% for all test items and variations of the percentage of Bledug Kuwu mud were by 5%, 10%, and 15%. The research results indicate that the soil in Gedebage is expansive soil that has very high swelling properties with a Plasticity Index (PI) value of 48.09%. The addition of mixed material in the form of Bledug Kuwu mud with a percentage of 5%, 10% and 15% and vermiculite of 4% for all variants reduced the PI value. The variant of 15% Bledug Kuwu mud + 4% vermiculite had the largest decrease of PI value which was 61.66%.

Copyright

© 2020, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - D Kumalasari
AU  - R D R B Prayogo
AU  - A Febriansya
PY  - 2020
DA  - 2020/12/22
TI  - Expansion Potential and Plasticity Index Value of Expansive Soil Stabilization with Vermiculite and Bledug Kuwu Mud
BT  - Proceedings of the International Seminar of Science and Applied Technology (ISSAT 2020)
PB  - Atlantis Press
SP  - 479
EP  - 483
SN  - 2352-5401
UR  - https://doi.org/10.2991/aer.k.201221.079
DO  - 10.2991/aer.k.201221.079
ID  - Kumalasari2020
ER  -