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Optimizing Mixture Composition to Improve the Performance of Porous Asphalt for Wearing Course as an Environmentally Friendly Road Construction Material Sulianti, Ika; Amiruddin, Amiruddin; Ibrahim, Ibrahim; Subrianto, A.
Jurnal Teknik Sipil dan Perencanaan Vol 21, No 1 (2019): Jurnal Teknik SIpil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v21i1.17354

Abstract

Abstract. Porous asphalt is an alternative in flexible pavement which is considered to make water seep into the soil. In previous research have been tested the mixture of  porous asphalt that meets porous asphalt porosity requirements, but found the weaknesses that the stability is still lower than the standard required. Based on result obtained before, the study is aimed at investigating the use of mixture composition variable with different percentages until the optimal conditions were obtained, namely making a normal mixture, 15%, 18.75%, 22.5%, 26.25%, 30% as sand composition reduction. The percentage of sand reducted from previous composition with different asphalt variations. Tests are carried out using the Marshall method. Sequence of tests show that the materials used for experiment meet the requirement.  Optimum Asphalt Content obtained for the mixture are 6% of the total mixed weight. The best Marshall characteristics for AC-WC porous asphalt obtained are at the percentage of 26.25% sand reduction.  
Optimizing Mixture Composition to Improve the Performance of Porous Asphalt for Wearing Course as an Environmentally Friendly Road Construction Material Sulianti, Ika; Amiruddin, Amiruddin; Ibrahim, Ibrahim; Subrianto, A.
Jurnal Teknik Sipil dan Perencanaan Vol 21, No 1 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v21i1.17354

Abstract

Abstract. Porous asphalt is an alternative in flexible pavement which is considered to make water seep into the soil. In previous research have been tested the mixture of  porous asphalt that meets porous asphalt porosity requirements, but found the weaknesses that the stability is still lower than the standard required. Based on result obtained before, the study is aimed at investigating the use of mixture composition variable with different percentages until the optimal conditions were obtained, namely making a normal mixture, 15%, 18.75%, 22.5%, 26.25%, 30% as sand composition reduction. The percentage of sand reducted from previous composition with different asphalt variations. Tests are carried out using the Marshall method. Sequence of tests show that the materials used for experiment meet the requirement.  Optimum Asphalt Content obtained for the mixture are 6% of the total mixed weight. The best Marshall characteristics for AC-WC porous asphalt obtained are at the percentage of 26.25% sand reduction.  
PEMANFAATAN LIMBAH CANGKANG KELAPA SAWIT PADA CAMPURAN BETON RINGAN Indrayani, Indrayani; Sulianti, Ika; Wahyudi, Wahyudi; Herbi, Bahusin Aji Jaya
FROPIL (Forum Profesional Teknik Sipil) Vol 11 No 2 (2023): FROPIL (Forum Profesional Teknik Sipil)
Publisher : Jurusan Teknik Sipil Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Berbagai macam bahan tambah telah sering dilakukan dalam upaya peningkatan mutu beton agar semakin tinggi dengan memanfaatkan bahan-bahan alternatif yang mudah didapat sehingga pembuatan beton menjadi ekonomis. Penelitian ini memanfaatkan limbah cangkang kelapa sawit pada campuran beton ringan, dimana cangkang kelapa sawit digunakan sebagai pengganti agregat kasar baik sebagian maupun keseluruhan dengan tujuan untuk mendapat pengaruh cangkang kelapa sawit pada pembuatan beton ringan, agregat kasar dengan cangkang kelapa sawit yang diharapkan dengan pemanfaatan limbah cangkang sawit ini akan mampu meningkatkan kuat tekan beton. Proses penggantian cangkang kelapa sawit ini yaitu dengan cara perhitungan terhadap volume agregat kasar. Variasi persentase cangkang kelapa sawit terhadap volume agregat kasar di dalam campuran adalah cangkang kelapa sawit 25%, cangkang kelapa sawit 50%, cangkang kelapa sawit 75% dan cangkang kelapa sawit 100%. Waktu pengujian kuat tekan beton dilakukan pada umur 14 dan 28 hari berdasarkan SNI 03-2491-2002. Dari hasil pengujian kuat tekan beton pada umur 28 hari diperoleh rata-rata sebesar 23.86 Mpa. Sedangkan hasil pengujian kuat tekan beton pada umur 28 hari menggunakan cangkat sawit pada variasi 25%, 50%, 75%, dan 100% memiliki nilai kuat tekan rata-rata sebesar 14,9 MPa, 11,6 MPa, 4,25 MPa, dan 2,73 MPa. Pada variasi 25% didapat kuat tekan beton sebesar 14,9 MPa, ini menunjukan bahwa cangkang kelapa sawit masih dapat digunakan sebagai campuran pada beton non struktural.
Evaluation of Concrete Compressive Strength with Coral Stone as a Fine Aggregate Replacement Ibrahim, Ibrahim; Sulianti, Ika; Andini, Dita Putri; Sentosa, Riandi; Panjaitan, MM Lanny W; Lukas, Lukas
CIVED Vol. 11 No. 3 (2024): September 2024
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v11i3.672

Abstract

This study examines the effect of using coral stone as a substitute for fine aggregate on the compressive strength of concrete. Tests were conducted with varying coral stone replacement percentages ranging from 0% to 100%. The results showed that coral stone can enhance the compressive strength of concrete, with an optimal replacement level of 80%, resulting in a 21.16% increase compared to normal concrete. However, replacements above 80% led to a decline in compressive strength, particularly at the 100% replacement level, which showed a 9.37% reduction in strength compared to normal concrete. This decrease was caused by increased porosity, varying aggregate quality, and an imbalance in the water-cement ratio, which disrupted the hydration process and microstructure formation of the concrete. Based on these findings, coral stone can be an effective alternative to replace fine aggregate such as sand, but its use should be limited to 80% to maximize the strength improvement without reducing performance.