Mechanical Behavior of Clay Soil Stabilized with Fly Ash and Bottom Ash

Authors

Soewignjo Agus Nugroho, Civil Engineering Department, Universitas Riau, Pekanbaru 28293, IndonesiaFollow
Azra Zulnasari, Civil Engineering Department, Universitas Riau, Pekanbaru 28293, IndonesiaFollow
Ferry Fatnanta, Civil Engineering Department, Universitas Riau, Pekanbaru 28293, IndonesiaFollow
Andius Dasa Putra, Researcher, Yokohama National University, Yokohama 240-8501, JapanFollow

Abstract

Soil is one of the most important aspects of an infrastructure given its functions of receiving and holding structural loads. However, not all soils have good physical and mechanical properties. To overcome those conditions, stabilization of the soil is practiced to meet the technical requirements. This study aims to determine the behavior of high plasticity clay stabilized with lime, fly ash, and bottom ash. These additives can be used as a stabilizing agent to increase soil strength. The percentage of additives varied from 5%–25% then mixed with clay and were tested through the (Unconfined Compression Strength (UCS) test. The UCS test was carried out with 6 treatments, including consecutively non-curing and unsoaked, non-curing and soaked, curing for 7 days and unsoaked, cured for 7 days and soaked, cured for 28 days and unsoaked, and cured for 28 days and soaked. Results show that the UCS value increased along with the span of curing time. Meanwhile, the soaking treatment of the sample decreased the UCS value.

Bahasa Abstract

Tanah merupakan salah satu aspek terpenting dari suatu infrastructures karena memiliki fungsi menerima dan menahan beban struktur diatasnya. Tetapi pada penerapannya, tidak semua tanah memiliki sifat-sifat fisik dan mekanik yang baik, untuk mengantisipasi kemungkinan-kemungkinan terjadinya kondisi tersebut maka dilakukan stabilisasi terhadap tanah agar memenuhi syarat-syarat teknis yang diperlukan. Penelitian ini bertujuan untuk mengetahui perilaku tanah lempung plastisitas tinggi yang distabilisasi dengan kapur, fly ash dan bottom ash. Zat aditif tersebut dapat digunakan sebagai bahan stabilisasi untuk meningkatkan kekuatan tanah. Persentase Zat aditif yang digunakan bervariasi mulai dari 5%-25%, dicampur dengan tanah lempung dan dilakukan pengujian UCS. Uji UCS dilakukan dengan 6 perlakuan yaitu tanpa pemeraman dan tanpa rendaman; tanpa pemeraman dan rendaman; pemeraman 7 hari dan tanpa rendaman; pemeraman 7 hari dan rendaman, pemeraman 28 hari dan tanpa rendaman; serta pemeraman 28 hari dan rendaman. Hasil penelitian menunjukkan bahwa nilai UCS meningkat seiring dengan lamanya waktu pemeraman. Sedangkan dengan perlakuan perendaman terhadap sampel mengakibatkan nilai UCS menurun.

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Recommended Citation

Nugroho, Soewignjo Agus; Zulnasari, Azra; Fatnanta, Ferry; and Putra, Andius Dasa (2022) "Mechanical Behavior of Clay Soil Stabilized with Fly Ash and Bottom Ash," Makara Journal of Technology: Vol. 26: Iss. 1, Article 1.
DOI: 10.7454/mst.v26i1.1444
Available at: https://scholarhub.ui.ac.id/mjt/vol26/iss1/1