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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Semesta Teknika Jurnal Teknik U Karst Martabe : Jurnal Pengabdian Kepada Masyarakat Jurnal Pemberdayaan: Publikasi Hasil Pengabdian Kepada Masyarakat Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat BERNAS: Jurnal Pengabdian Kepada Masyarakat Teknika Sains : Jurnal Ilmu Teknik Prosiding Seminar Nasional Program Pengabdian Masyarakat Journal of Community Empowerment
Anita Widianti
Universitas Muhammadiyah Yogyakarta
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Public Health Social Sciences Transportation Veterinary Other

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Journal : U Karst

 1 
Direct Shear Strength of Clay Reinforced with Coir Fiber Anita Widianti; Willis Diana; Maratul Hasana
U Karst Vol 4, No 2 (2020): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2455.425 KB) | DOI: 10.30737/ukarst.v4i2.1020

Abstract

Indonesia is the largest coconut producing country in the world. However, the resulting coir waste is still rarely used for structural materials. This research studied the effect of random inclusion of coir fiber on the shear strength of clay with high plasticity. The carried test in this study is a direct shear strength test. The fiber content variations used are 0%, 0.25%, 0.50%, 0.75%, and 1% of the dry weight of the mixture with a fiber length of between 30 mm to 50 mm. The results show that the reinforcement of coir fiber can increase the cohesion and friction angle. The maximum increase in cohesion value was obtained at fiber content of 0.75%, which was 39.66%. The increase in the value of the friction angle was obtained at 1% fiber content, which was 46.67%. The optimum coir fiber content was achieved at the fiber content of 0.75%. With this content, the value of the shear strength reaches its maximum with an increase of 39.4% at a normal stress of 8.071 kPa.
Direct Shear Strength of Clay Reinforced with Coir Fiber Anita Widianti; Willis Diana; Maratul Hasana
U Karst Vol. 4 No. 2 (2020): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v4i2.1020

Abstract

Indonesia is the largest coconut producing country in the world. However, the resulting coir waste is still rarely used for structural materials. This research studied the effect of random inclusion of coir fiber on the shear strength of clay with high plasticity. The carried test in this study is a direct shear strength test. The fiber content variations used are 0%, 0.25%, 0.50%, 0.75%, and 1% of the dry weight of the mixture with a fiber length of between 30 mm to 50 mm. The results show that the reinforcement of coir fiber can increase the cohesion and friction angle. The maximum increase in cohesion value was obtained at fiber content of 0.75%, which was 39.66%. The increase in the value of the friction angle was obtained at 1% fiber content, which was 46.67%. The optimum coir fiber content was achieved at the fiber content of 0.75%. With this content, the value of the shear strength reaches its maximum with an increase of 39.4% at a normal stress of 8.071 kPa.
Increasing Unconfined Compressive Strength of Soft Clay Stabilized with Coir Fiber and Bagasse Ash Mix Widianti, Anita; Sundi, Svastika Ariana; Rahmawati, Anita; Wibowo, Dian Eksana
UKaRsT Vol. 8 No. 1 (2024): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v8i1.5548

Abstract

Increasing coir fiber and bagasse ash waste can cause environmental degradation. Utilization of this waste in construction work is still rarely done. Coir fiber is a natural material with the highest coefficient of friction and tensile strength. Bagasse ash has a high silica content and is suitable for use as pozzolan. Soil stabilization with a combination of both is expected to improve the geotechnical properties of soft soil. This research aims to analyze the unconfined compressive strength (UCS) and secant modulus of soft clay stabilized with coir fiber-bagasse ash mix. Coir fiber as much as 0.75% and ash with varying contents: 0%, 2%, 4%, 6%, 8%, and 10% of the total weight of the mixture. The specimens were cured for 28 days. UCS tests were conducted according to ASTM D2166-16 with the axial stress and strain relationship curve results to determine the UCS and secant modulus. The results showed that the UCS value and secant modulus value increased along with increasing bagasse ash content. The maximum value was achieved at 8% ash variation with a UCS value of 472.45 kPa (an increase of 382% from a soil-coir fiber mix) and a secant modulus value of 21.94 MPa (an increase of 571% from a mixture of soil and coir fiber). The research results show that this mixed soil is classified as hard soil, which can withstand high loads. It is hoped that the results of this research can become a reference for stabilizing soft soil in the field.
Co-Authors Adam Pamudji Rahardjo Agus Setyo Muntohar Agus Setyo Muntohar Alpriandi, Mulya Anita Rahmawati Dedi Wahyudi Dian Eksana Wibowo Diana, Wilis Edi Hartono Edi Hartono Edi Hartono Eka Prasetio Fadillawaty Saleh Hadipuro, Damarjati Galang Hafidzul Azmi Jefri Pratama Jefri Pratama Mandiyo Priyo Mandiyo Priyo Mandiyo Priyo, Mandiyo Mangopa, Zulfikri Nanda Putra Maratul Hasana Muhammad Agung Pambudi Mulya Alpriandi Muntoha, Aji Muntohar, Agus Setyo Nanda Putra Mangopa, Zulfikri Nurtopo, Divania Prasetio, Eka Ramadhan, Bramanda Fakhri Rinda Apriliani Saputra , Iqbal Rizki Sentot Hardwiyono Sentot Hardwiyono, Sentot Sri Handayani, Yuli Sundi, Svastika Ariana Ulima, Zada Wahyudi, Dedi Willis Diana Willis Diana Yuli Sri Handayani Zada Ulima