Civil Engineering and Architecture Vol. 12(3A), pp. 2139 - 2148
DOI: 10.13189/cea.2024.121315
Reprint (PDF) (1122Kb)

Experimental Substantiation of Improvement of Compressibility Characteristic of Expansive Clay with Nano SiO₂ and Polyamide Fiber Inclusion

N. T. Hirwo ^1,2,*, Pratikso ², R. Karlinasari ^2
1 Faculty of Civil Engineering and Planning, Institut Teknologi Budi Utomo, Indonesia
² Department of Civil Engineering, Faculty of Engineering, Universitas Islam Sultan Agung, Indonesia

ABSTRACT

The presence of expansive clay often causes damage to infrastructure built on it. Expansive clay with great compressibility and swelling potential requires improvement or stabilization of the soil. It can be successfully done by mechanical and chemical compressibility effect of adding Polyamide (PA) fibre as the material for mechanical stabilization and nano SiO₂ as the material for chemical stabilization. Nano SiO₂ can be produced from waste from geothermal power plants. In the future, this material is very suitable for use in order to reduce waste that pollutes the natural environment. The expansive clay used in this study deployed a sample of clay containing mineral montmorillonite with the USCS classification in the high plasticity (CH) category. The mixed materials used include PA fibre with variations of 0%, 0.5%, 0.75% and 1% by dry soil weight and nano SiO₂ with variations of 0%, 1%, 2% and 3% by dry soil weight. To prove the effectiveness of using nano SiO₂, this study compares the treatment with the use of micro SiO₂ materials under the same comparison variations. With inclusion of the polyamide fiber at the above ratio, the compression index decreased slightly of around 11%. But this is still better in comparison with inclusion of nano SiO₂ at the above ratio with the result of compression index of around 3%. With inclusion of the polyamide fiber at the best above ratio, the potential swelling decreased quite good of around 31%. Nano SiO₂ inclusions have achieved even better results at the best above ratio with the result of potential swelling of around 64%. The combination of these two materials results in a reduction in swelling potential of around 79%. The results of this test show that expansive clay which has been stabilized using PA fibers and nano SiO₂ is able to prevent potential swelling and reduce its compressibility.

KEYWORDS
Expansive Clay, Nano SiO₂, Polyamide Fibre, Stabilization, Compressibility

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] N. T. Hirwo , Pratikso , R. Karlinasari , "Experimental Substantiation of Improvement of Compressibility Characteristic of Expansive Clay with Nano SiO₂ and Polyamide Fiber Inclusion," Civil Engineering and Architecture, Vol. 12, No. 3A, pp. 2139 - 2148, 2024. DOI: 10.13189/cea.2024.121315.

(b). APA Format:
N. T. Hirwo , Pratikso , R. Karlinasari (2024). Experimental Substantiation of Improvement of Compressibility Characteristic of Expansive Clay with Nano SiO₂ and Polyamide Fiber Inclusion. Civil Engineering and Architecture, 12(3A), 2139 - 2148. DOI: 10.13189/cea.2024.121315.