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Journal : Journal of Applied Civil Engineering and Infrastructure Technology (JACEIT)

Pengaruh Penambahan Limbah Plastik Low Density Polyethylene Terhadap Karakteristik Campuran Laston AC-WC Erni, Dwi Susanti; Rifqi, Mirza Ghulam; Amin, M. Shofi'ul
Journal of Applied Civil Engineering and Infrastructure Technology Vol 2 No 2 (2021): Desember 2021
Publisher : Indonesian Society of Applied Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52158/jaceit.v2i2.67

Abstract

The problem of plastic waste is now one of the world's concentrations. Efforts to reduce and prevent many have been done, but in general the results obtained are not comparable with the growing use of plastics that continues to increase, especially plastics that are not managed properly. One of the efforts made is the utilization of plastic waste as added ingredients of Laston AC-WC hot asphalt mixture called modification. The purpose of this study was to determine how the effect of adding Low Density Polyethylene (LDPE) plastic waste to the characteristics of Marshall Laston AC-WC. Tests carried out include aggregate testing, asphalt testing, and plastic testing, and Marshall testing. The design of the mixture is done by dry (dry process) using a variation of plastic content of 0%, 4.5%, 5%, and 5.5%, each of which uses 5 levels of asphalt which is 5%, 5.5%, 6% , 6.5%, and 7% with 3 specimens each, so that there are a total of 75 specimens. Marshall test results obtained KAO of 6.5% with a variation of plastic content of 5.5%, obtained stability of 2167.40 kg, Flow 3.8 mm, VIM 3.94%, VMA 15.95%, VFA / VFB 77, 12%, and MQ 570.37 kg / mm. So that the addition of LDPE type plastic waste meets (General Specifications of Bina Marga, 2018).
Perbandingan Kemampuan Menahan Beban Aksial Kolom Pendek Berlubang Dengan Variasi Jarak Sengkang Pratama, Muhamad Iqbal Dafa; Khomari, Mohamad Galuh Khomari; Wiryasuta, I Ketut Hendra; Amin, M. Shofi'ul; Rifqi, Mirza Ghulam
Journal of Applied Civil Engineering and Infrastructure Technology Vol 7 No 2 (2026): Desember 2026 (Articles in Press)
Publisher : Indonesian Society of Applied Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52158/jaceit.v7i2.1271

Abstract

This study investigates the effect of stirrup spacing variation on the axial load capacity of short reinforced concrete columns with openings. The research focuses on square cross-section short columns measuring 12 cm × 12 cm × 45 cm, incorporating a pipe opening that reduces the cross-sectional area by 5.58%. The objective is to determine whether varying the stirrup spacing can enhance the axial compressive strength of perforated columns, which typically experience strength reduction due to the decreased cross-sectional area. The study was conducted experimentally in a laboratory using 20 MPa concrete, with longitudinal reinforcement of ø10 mm and stirrups of ø6 mm. Two types of columns were tested: solid columns (with 19 cm stirrup spacing) and perforated columns (with 8 cm stirrup spacing). Test results indicate that reducing stirrup spacing in perforated columns was not sufficiently effective to equal or surpass the axial strength of solid columns. The solid columns had an average axial compressive strength of 296.71 kN, while the perforated columns with 8 cm stirrup spacing showed a slightly lower strength of 288.92 kN, representing a decrease of 2.62%.