| Issue |
E3S Web of Conf.
Volume 479, 2024
International Seminar of Science and Applied Technology: Natural Resources Management for Environmental Sustainability (ISSAT 2023)
|
|
|---|---|---|
| Article Number | 06005 | |
| Number of page(s) | 12 | |
| Section | Soil Sciences | |
| DOI | https://doi.org/10.1051/e3sconf/202447906005 | |
| Published online | 18 January 2024 | |
The effect of waste marble powder and phosphoric acid on the shear angle and cohesion value of expansive soils
1 Lecturer in the Department of Civil Engineering, Bandung State Polytechnic, Indonesia
2 Postgraduate Student in Infrastructure Engineering, Bandung State Polytechnic, Indonesia
3 Lecturer in the Department of Civil Engineering, Dili Institute of Technology, Timor-Leste
* Corresponding author: syahril_polban@yahoo.com
In general, the expansive clay soil is a problematic soil due to the impact of climate change, during the rainy season the soil expands, and during the dry season the soil shrinks and cracks. Of these problems, it is necessary to carry out soil stabilization in order to determine the mechanical properties of the soil using the Waste Marble Powder (WMP) and Phosphoric Acid (PA) chemicals. To improve soil characteristics, tests were carried out with a mixture of 2.5%, 4%, 5.5% and 7% WMP, while Phosphoric Acid was a fixed percentage of 4% for the expansive soil. Curing periods of 3 days,7 days, and 14 days were also conducted in this study. According to the test results, the increase in the shear angle value, from originally 6.45° changed to 29.81° which increased by 21.64% of the percentage of the original soil, while the soil cohesion value, from originally 0.37 kg/cm2 changed to 2.25 kg/cm2 which increase of 16.44% in the curing period of 14 days. This increase is caused by chemical reactions that occur as a result of chemical elements, especially calcium (Ca) and potassium (K) contained in marble powder waste, and the mineral phosphorus (P) contained in phosphoric acid chemicals.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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