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Examining Polyethylene Terephthalate (PET) as Artificial Coarse Aggregates in Concrete Bachtiar, Erniati; Mustaan, Mustaan; Jumawan, Faris; Artayani, Meldawati; Tahang, Tahang; Rahman, Muhammad Junaedy; Setiawan, Arman; Ihsan, Muhammad
Civil Engineering Journal Vol 6, No 12 (2020): December
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/cej-2020-03091626

Abstract

This study aims to examine the effect of recycled Polyethylene Terephthalate (PET) artificial aggregate as a substitute for coarse aggregate on the compressive strength and flexural strength, and the volume weight of the concrete. PET plastic waste is recycled by heating to a boiling point of approximately 300°C. There are five variations of concrete mixtures, defined the percentage of PET artificial aggregate to the total coarse aggregate, by 0, 25, 50, 75 and 100%. Tests carried out on fresh concrete mixtures are slump, bleeding, and segregation tests. Compressive and flexural strength tests proceeded based on ASTM 39/C39M-99 and ASTM C293-79 standards at the age of 28 days. The results showed that the use of PET artificial aggregate could improve the workability of the concrete mixture. The effect of PET artificial aggregate as a substitute for coarse aggregate on the compressive and flexural strength of concrete is considered very significant. The higher the percentage of PET plastic artificial aggregate, the lower the compressive and flexural strength, and the volume weight, of the concrete. Substitution of 25, 50, 75 and 100% of PET artificial aggregate gave decreases in compressive strength of 30.06, 32.39, 41.73 and 44.06% of the compressive strength of the standard concrete (18.20 MPa), respectively. The reductions in flexural strength were by respectively 19.03, 54.50, 53.95 and 61.00% of the standard concrete's flexural strength (3.59 MPa). The reductions in volume weight of concrete were by respectively 8.45, 17.71, 25.07 and 34.60% of the weight of the standard concrete volume of 2335.4 kg/m3 Doi: 10.28991/cej-2020-03091626 Full Text: PDF
PEMANFAATAN SAMPAH KERTAS MENJADI PAPAN PARTIKEL SEBAGAI DINDING DEKORATIF RUANGAN Artayani, Meldawati; Jumawan, Faris; TS, Ayu Tri
Nature : National Academic Journal of Architecture Vol 2 No 2 (2015): Nature
Publisher : Department of Architecture, Faculty of Science and Technology, Alauddin State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/nature.v2i2a10

Abstract

The problem of garbage in this discussion is devoted to the dry waste, for example waste paper. The amount of paper waste in the city of Makassar could reach 322.16 m³ / day and will continue to increase in tandem with the increasing population. As researchers attempt to reduce and increase the use of waste paper grades in particular so as to provide benefits to society in general, that is by recycling waste paper into particle board as a decorative wall of the room that is easy, cheap and environmentally friendly. The research will be conducted experiments in the laboratory and will last for 5 (five) months to determine the basic characteristics of particle board decorative paper as the wall of the room. The stages of the process, namely pegumpulan materials, materials processing as well as physical and mechanical testing. Variation of particle board that investigated the range of differences in surface texture and thickness.
ANALISIS INSTRUMEN MITIGASI KEBISINGAN LALU LINTAS PADA RUANG TERBUKA BINAAN PUBLIK (RTBPU) DI WILAYAH PERKOTAAN Suhartina, Suhartina; Jumawan, Faris; Artayani, Meldawati
Nature : National Academic Journal of Architecture Vol 7 No 1 (2020): June
Publisher : Department of Architecture, Faculty of Science and Technology, Alauddin State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/nature.v7i1a3

Abstract

Abstrak_Pelataran pantai losari dalam perkembangannya sebagai ruang terbuka binaan publik (RTBPU) dirancang untuk memberikan kenyamanan bagi pengunjungnya, namun salah satu faktor penyebab munculnya ketidak nyamanan pengunjung adalah kebisingan. Berdasarkan hal tersebut, maka dipandang perlu untuk melakukan perhitungan tingkat kebisingan jalan raya pada Pelataran Pantai Losari guna mengetahui apakah tingkat kebisingan yang terjadi masih dapat ditolerir atau sudah melampaui ambang batas sehingga perlu dilakukan mitigasi untuk menurunkan tingkat kebisingan. Tujuan dari penelitian ini yaitu (1) mengidentifikasi tingkat kebisingan yang disebabkan oleh lalu lintas pada RTBP Pelataran Pantai Losari, (2) Menganalisis pengaruh instrument mitigasi kebisingan lalu lintas terhadap tingkat kenyamanan pengunjung pada RTBPU Pelataran Pantai Losari. Lokasi pengambilan data penelitian dilaksanakan di Pelataran Pantai Losari jalan Penghibur Kota Makassar, penelitian dilaksanakan pada 5 titik pengukuran selama 3 minggu, waktu pengukuran: pukul 07.00 s/d 24.00 WITA. Jenis penelitian menggunakan survey bersifat analitik dengan metode cross sectional. Penelitian kebisingan Pelataran Pantai Losari menunjukkan bahwa rata-rata tingkat kebisingan dari aktivitas lalu lintas pada siang-malam hari sebesar 68,01 – 74,97 dB (A), dan tingkat kebisingan campuran dari aktivitas dari pengunjung dan aktivitas lalu lintas sebesar 68,02 – 73,86 dB (A). Instrument mitigasi yang berfungsi dengan baik dalam mereduksi kebisingan lalu lintas berada pada kawasan Pelataran bahari/pantai losari, hal ini dipengaruhi oleh banyaknya jenis dan jumlah instrument mitigasi yang terdapat pada daerah ukur seperti pohon, taman, tugu, sculpture/patung, disertai dengan jarak ukur yang besar.Kata kunci: Mitigasi Kebisingan; Lalu Lintas; Pelataran Pantai Losari. Abstract_ The Yard of Losari Beach in its development as a public of open space built (RTBPU) is designed to provide comfort for its visitors, but one of the factors causing visitor inconvenience is noise. Based on this, it is necessary to calculate the road noise level at the Losari Beach Yard in order to determine whether the noise level that occurs can still be tolerated or has exceeded the threshold so that mitigation is needed to reduce the noise level. The objectives of this study were (1) Identifying the noise level caused by traffic at the RTBP Losari Beach Yard, (2) Analyzing the effect of traffic noise mitigation instruments on the comfort level of visitors at RTBPU Losari Beach Yard. The location of the data collection was carried out at the Losari Beach Yard on the Penghibur street in Makassar City, the study was conducted in 5 measurement points for 3 weeks, measurement time: 07.00 - 24.00 WITA. The type of research that used was an analytical survey with a cross sectional method. Noise research of Losari Beach Court showed that the average noise level of day-night traffic activity is 68.01 - 74.97 dB(A), and the mixed noise level of visitor activity and traffic activity is 68.02 - 73, 86 dB(A). Mitigation instruments that are function well in reducing traffic noise are in the maritime / beach area of Losari, this is influenced by the number and type of mitigation instruments found in measuring areas such as trees, parks, monuments, sculptures, accompanied by large distancesKeywords: Noise Mitigation; Traffic; Losari Beach Yard.
Type on the Sound Absorption Coefficient Chicken Feather Composite Artayani, Meldawati; Kusno, Asniawaty; Jamala, Nurul; Mulyadi, Rosady
ASTONJADRO Vol. 13 No. 2 (2024): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v13i2.15112

Abstract

the potential to be a composite reinforcement and increase sound absorption through the Chemical Pulping process. This study aims to investigate the alleged influence of the use of matrix type on the strength of sound absorption in chicken feather fiber composites. The research method used is experimental research with the manufacture of composite specimens that vary the volume fraction of composite fibers with various types of matrices. Sound absorption testing using impedance tubes. Data analysis techniques in this study use descriptive data analysis. The results of this test show the effect of using matrix type on increasing the absorption coefficient of SBA composites. The maximum absorption coefficient is found in the SBA-K composite (Chicken Feathers – Kanji).