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All Journal Rekayasa Sipil JURNAL SIPIL SAINS Civil Engineering Journal Astonjadro Borneo Engineering : Jurnal Teknik Sipil JAIM (Jurnal Abdi Masyarakat) Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Jurnal Kacapuri : Jurnal Keilmuan Teknik Sipil Lowland Technology International Jurnal Talenta Sipil Indonesian Journal of Fundamental Sciences Journal of Applied Civil and Environmental Engineering (JACEE)
Erniati Bachtiar
Universitas Fajar
Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Transportation Other

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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
Efek Curing Air Laut Terhadap Kuat Tekan Beton Mutu Tinggi Yang Menggunakan Fly Ash Sebagai Subtitusi Pasir Azhari Zahlim; Erniati Bachtiar; Ritnawati Makbul
Borneo Engineering : Jurnal Teknik Sipil Volume 6 Nomor 1 Tahun 2022
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v1i1.2161

Abstract

Fly ash waste accumulates from year to year at PLTU in South Sulawesi. The potential of fly ash as an environmentally friendly material to be used as a cement substitute is significant, either partially or entirely. This research aims to analyze the corelation between fly ash substitution as sand substitution and the compressive strength of high-strength concrete treated in seawater and freshwater. Researchers made samples of high-strength concrete with variations in the percentage of fly ash and variations in treatment. Variations in the percentage of fly ash as substitution of sand are 0%, 10%, 20%, and 30%, and variations in curing using fresh water and seawater. Sample treatment was carried out for up to 28 days, after which the compressive strength test according to the Indonesian National Standard (SNI) was carried out. The study results show that the relationship between fly ash substitution and a sand substitution on the compressive strength has a significant correlation. The higher the percentage of fly ash, the higher the compressive strength of the concrete, both fresh and seawater curing. Besides that, the compressive strength of high-strength concrete with freshwater curing treatment is greater than the seawater curing treatment.
Workability dan Sifat Mekanik Self Compacting Geopolimer Concrete (SCGC) Rita Hardianti Aris; Erniati Bachtiar; Ritnawati Makbul
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 6, No 2 (2021): September
Publisher : Litbang Pemas - Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v6i2.718

Abstract

The purpose of this study was to investigate the relationship between molarity and workability in Self-Compacting Geopolymer Concrete (SCGC), as well as mechanical properties. Compressive strength and split tensile strength tests are used to characterize the mechanical characteristics in this research. Additionally, the study investigates the optimal molarity for self-compacting geopolymer concrete. Fly ash was used in lieu of cement in this research. On new concrete self-compacting geopolymer, workability is determined using the EFNARC standard, which includes the Slump Flow, V-Funnel, and L-Box tests. ASTM 39/C 39M-99 standard is used to determine the compressive strength of self-compacting concrete geopolymer. On new concrete, workability is determined using the EFNARC standard, which comprises the Slump Flow Test, a V-funnel, and an L-Box. The compressive strength of concrete samples is determined according to the ASTM 39/C 39M – 99 standard. The SNI 03-2491-2002 standard is used to determine the split tensile strength of concrete. At the ages of 7, 14, and 28 days, tests were conducted. The findings indicated that new concrete at 11M-13M satisfied the criteria for SCGC workability. The compressive and split tensile strengths of SCGC grow as the concrete ages. In self-compacting geopolymer concrete, the optimal molarity is 13 M.
The Effect of Seawater on The Compressive Strength and Split Tensile Strength in Self Compacting Geopolymer Concrete Herwina Rahayu Putri; Firman Paledung; Erniati Bachtiar; Popy Indrayani
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 6, No 2 (2021): September
Publisher : Litbang Pemas - Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v6i2.722

Abstract

Fly ash is a kind of trash that may degrade the quality of the air. As a result, it is critical that it be used as an ecologically beneficial material. Although cement is the most often used construction material, its manufacturing generates carbon dioxide, which may degrade air quality. The aim of this research was to evaluate the compressive strength and split tensile strength of self-compacting geopolymer concrete (SCGC) cured in seawater, as well as to compare SCGC with and without saltwater. In this research, a cylindrical specimen with a diameter of 10 cm and a height of 20 cm was utilized as the specimen. Fly ash is used in proportion to fine and coarse aggregates at a ratio of 1: 0.65: 1.5. Using a 0.4 activator to binder ratio. The molarity ranges utilized were 11 M, 12 M, 13 M, 14 M, and 15 M. Compressive strength and split tensile strength tests were conducted on 28-day-old concrete. The findings indicated that when the molarity of SCGC treated with seawater increased from 11 to 15 M, the compressive and split tensile strengths increased. Compressive strength values were greatest in SCGC treated at room temperature when an activator of 13 M was used, and compressive strength values dropped in SCGC treated at room temperature when an activator greater than 13 M was used
KUAT TEKAN DAN TARIK BELAH PADA BETON YANG MENGGUNAKAN AGREGAT KASAR LIMBAH PLASTIK Erniati Bachtiar; Muh Arief Muzakkir; Takwin Takwin; Sri Gusty; Nur Khaerat Nur
Rekayasa Sipil Vol 15, No 1 (2021)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2021.015.01.4

Abstract

Plastic represent thousands of materials with different physical, mechanical, and chemical properties. As plastic demand and usage increase, it is undeniable that the amount of plastic waste will increase. Plastic has the features of which cannot rot; it does not decompose naturally; it cannot absorb water or cannot rust. So it will eventually cause problems for the environment. This study aims to determine the compressive strength and tensile strength of concrete mixes that use coarse aggregates of plastic waste as a substitute for natural aggregates / broken rocks. There are three variations of samples made with mutations in the type of plastic used, namely PP (Polypropylene) plastic, PET (Polyethylene Terephthalate) plastic, and PP & PET combination plastic. The specimen is cylindrical, with a size of 10 cm x 20 cm. Compressive strength and tensile strength testing is carried out at 28 days according to SNI standards. The results obtained the compressive strength obtained on each variation of standard concrete samples, PP aggregate concrete, PET aggregate concrete, and PP & PET aggregate concrete, respectively, of 21.64 MPa, 10.61 MPa, 8.48 MPa, and 10.18 MPa. Whereas for the splitting tensile strength of standard concrete, PP aggregate concrete, PET aggregate concrete, and PP & PET aggregate concrete respectively were 2.86 MPa, 1.80 MPa, 1.70 MPa, and 1.80 MPa.
PENGARUH HUJAN ASAM TERHADAP KUAT TEKAN dan POLA RETAK BETON MUTU TINGGI YANG MENGGUNAKAN FLY ASH SEBAGAI SUBITUSI PASIR Amar Ma’ruf Hamri; Erniati Erniati; Popy Indrayani; Arbain Tata
JURNAL SIPIL SAINS Vol 11, No 2 (2021)
Publisher : Program Stud Teknik Sipil Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/sipilsains.v11i2.3724

Abstract

Pembangunan konstruksi beton yang berada di lokasi yang memiliki air hujan yang mengandung asam dengan jumlah pH di bawah normal (pH ±5,6) membutuhkan material penyusun beton mutu tinggi untuk meningkatkan kinerja beton. Fly ash di PLTU Bosowa Energi Jenepponto menumpuk dari tahun ke tahun. Tujuan penelitian ini untuk menganalisis perbandingan kuat tekan dan pola retak pada beton mutu tinggi yang menggunakan fly ash sebagai pengganti pasir dengan perendaman air tawar dengan air hujan asam pada umur 28 hari serta menganalisis pola retak hubungan variasi fly ash pada beton mutu tinggi yang direndam di air hujan asam pada umur 28 hari. Material penyusun pada penelitian ini menggunakan variasi fly ash (0%, 10%, 20% dan 30%) sebagai pengganti pasir pada beton mutu tinggi. Hasil penelitian menunjukkan bahwa beton mutu tinggi yang menggunakan fly ash (0%, 10%, 20%, dan 30%) sebagai pengganti pasir kuat tekan yang dihasilkan pada perendaman air tawar lebih besar dari pada perendaman air hujan asam pada umur 28 hari. Hujan asam dapat menurunkan kuat tekan pada beton mutu tinggi subtitusi fly ash sebagai pasir namun penurunan tersebut masih kecil sebesar kurang lebih 5%.  Pola retak yang baik menurut nilai kuat tekan tertinggi adalah pola retak bentuk kehancuran kerucut dan belah yang menggunakan fly ash 30% sebagai pengganti pasir pada beton mutu tinggi.
THE COMPRESSIVE STRENGTH ON C-TYPE FLY ASH-BASED GEOPOLYMER MORTAR Erniati Bachtiar
Lowland Technology International Vol 22 No 2 (2020): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v22i2, Septemb.754

Abstract

Reducing and replacing the use of cement in construction work is one way to create an environmentally friendly city. Cement production produces the effect of carbon dioxide, which creates a greenhouse effect. It is necessary to utilize renewable resources that can replace the function of cement to reduce pollution. This research aimed to determine the value of crystallization and amorphous in two types of fly ash in South Sulawesi-Indonesia. The materials used in this research are sand, fly ash, Sodium Hydroxide, and Sodium Silicate. Samples using fly ash originating from two different steam power plants, which are named fly ash A and fly ash B. Comparison of chemicals Sodium Hydroxide and Sodium Silicate in the manufacture of activators, is 1: 2. The amount of sand used is 2.75 from the amount of fly ash. There are two variations of Mortar samples, namely samples using fly ash A (FA_A) and fly ash B (FA_B). GM_FAA is the A-fly ash geopolymer mortar, and MG_FAB is the B-Fly ash geopolymer mortar. The results showed that the percentage of crystals and amorphous in A-Fly ash (FA_A) were 51.02% and 48.97%, while B-Fly ash (FA_B) was 51.28% and 48.71%, respectively. The use of FA_A material in the production of geopolymer mortars has a higher strength than mortars that use FA_B. The use of a suitable activator composition in making mortars using FA_A is 10 M Natrium Hidroksida with alkaline Modulus 2, while mortars using FA_B is 6 M Natrium Hidroksida with alkaline modulus 1.5.
PEMANFAATAN DAUR ULANG LIMBAH PLASTIK POLYETHYLENE TEREPHTHALATE (PET) SEBAGAI PENGGANTI AGREGAT KASAR PADA BETON Asrar Asrar; Erniati Bachtiar; Sri Gusty; Fatmawati Rachim; Ritnawati Ritnawati; Arman Setiawan
Jurnal Kacapuri : Jurnal keilmuan Teknik Sipil Vol 3, No 2 (2020): JURNAL KACAPURI : JURNAL KEILMUAN TEKNIK SIPIL (Edisi Desember 2020)
Publisher : Universitas Islam Kalimantan Muhammad Arsyad Al-Banjari Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jk.v3i2.4076

Abstract

Sekarang ini material konstruksi beton diarahkan bersifat berkelanjutan dan ramah lingkungan. Banyaknya limbah plastik yang tidak terpakai dan merusak lingkungan. Daur ulang limbah plastik menjadi agregat merupakan salah satu upaya dalam membuat material yang ramah lingkungan. Tujuan penelitian ini adalah untuk mengetahui pengaruh agregat limbah plastik PET (Polyethylene Terephthalate) sebagai pengganti agregat kasar terhadap sifat fisik (slump test, bleeding, segregation, berat isi) dan sifat mekanik kuat tekan beton. Variasi penelitian menggunakan   variasi persentase agregat limbah plastik PET (Poyethylene Terephthalate) pada campuran beton sebesar 0%, 25%, 50%,75% dan 100% terhadap volume agregat kasar pada campuran beton. Penambahan persentase agregat limbah plastik PET (Poyethylene Terephthalate) berpengaruh sangat signifikan pada nilai kuat tekan beton, semakin tinggi persentase agregat limbah plasti PET (Poyethylene Terephthalate) maka semakin rendah nilai kuat tekan beton. Menurunnya nilai berat isi, kuat tekan sangat dipengaruhi oleh bertambahnya persentase agregat limbah plastik PET (Poyethylene Terephthalate) pada beton. Kata Kunci: Poyethylene Terephthalate, Beton, Agregat Kasar, Kuat Tekan, Workability
PENGOLAHAN KOTORAN TERNAK SAPI MENJADI BIOGAS DAN PUPUK ORGANIK DI DESA PURNAKARYA, KECAMATAN TANRALILI, KABUPATEN MAROS, SULAWESI SELATAN Nur Zaman; Erniati Bachtiar; Selfina Gala; Andi Nuraliyah
Jurnal Abdi Masyarakat Vol 6, No 1 (2022): Jurnal Abdi Masyarakat November 2022
Publisher : Universitas Kadiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/jaim.v6i1.3411

Abstract

Salah satu usaha peternakan sapi yang berpotensi untuk menghasilkan teknologi biogas dan pupuk organik adalah peternakan Kareem Farm yang berlokasi di Jalan Reformasi Dusun Tangnga, Desa Purnakarya, Kecamatan Tanralili, Kabupaten Maros, Sulawesi Selatan. Peternakan tersebut telah memiliki kandang sapi dengan kapasitas 40 ekor sapi, namun yang ada sekarang terdapat 28 ekor dengan jenis yang berbeda. Permasalahan utama pada usaha peternakan sapi Kareem Farm adalah menumpuknya limbah/kotoran sapi disekitar kandang. Kondisi sekarang, satu ekor sapi menghasilkan 8 kg kotoran perhari. Dalam satu hari dapat menghasilkan sekitar 224 kg limbah/kotoran. Kotoran tersebut hanya dibuang disekitar kandang dan belum dapat diolah dan dimanfaatkan dengan baik karena keterbatasan pengetahuan masyarakat tentang potensi ekonomi/bisnis dan pengolahan limbah ternak sapi menjadi nilai tambah ekonomi.  Banyaknya limbah kotoran sapi yang mencapai 224 kg per hari membuat limbah kotoran tersebut setiap harinya semakin menumpuk di sekitar kandang, hal ini membuat lingkungan kandang sapi menjadi semakin kotor, kuantitas kotoran yang semakin hari semakin banyak, sehingga menimbulkan bau yang tidak sedap dan menyebabkan terjadinya pencemaran lingkungan disekitar masyarakat. Timbulnya bau tersebut dapat memicu terjadinya konflik sosial, karena mengganggu masyarakat yang bermukim disekitarnya. Permasalahan tersebut dieselesaikan dengan Masukanya PKM pengolahan kotoran ternak sapi menjadi suatu produk yakni Biogas dan Pupuk Organik. Intalasi biogas dan pelatihan biogas dan pupuk organik dari ternak sapi telah dilakukan pada peternakan Kareem Farm dan masyarakat sekitarnya peternakan tersebut. Disamping itu terbentuk kelompok tani “Tangnga Jaya”. Disamping itu masyarakat lebih tertarik dengan pembuatan pupuk organik dengan menggunakan cacing yang lebih mudah, murah dan bahan bakunya dapat diperoleh dari lingkungan masyarakat.
Pengaruh Air Laut terhadap Kapasitas Beban pada Balok Beton Bertulang yang Diperkuat GFRP-S dengan Perendaman selama Satu Tahun Asri Mulya Setiawan; Erniati Bachtiar
Indonesian Journal of Fundamental Sciences Vol 4, No 2 (2018)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (603.802 KB) | DOI: 10.26858/ijfs.v4i2.7642

Abstract

The test results on specimens without GFRP-S reinforcement showed that there was a decrease in load capacity for BN0 specimens of 1.383%. Decrease in BN6 test material capacity after soaking sea water for 6 months. Whereas for specimens with reinforcement of GFRP-S shows a decrease in maximum load on BF6 and BF12 specimens against BF0 test objects. The percentage of decrease in loads is 3.898% and 4.285%, respectively. Decreased load capacity of BF12 specimens after 12 months of seawater immersion. This is due to a decrease in the capacity of the bond on the GFRP along with the soaking time, thus accelerating the occurrence of debonding.
Co-Authors Amar Ma’ruf Hamri Andi Ibrahim Yunus Andi Muhammad Nur Padli Andi Muhammad Nurpadli Andi Nuraliyah Anugrah . Arbain Tata Arman Setiawan Arpin Tari Asrar Asrar Asri Mulya Setiawan Azhari Zahlim Chaeril Anwar Clara Nita Fitriany Farida Isroani Faris Jumawan, Faris Fatmawati Rachim Firman Paledung Fudlailah, Pratiwi Herwina Rahayu Putri Meldawati Artayani, Meldawati Muh Arief Muzakkir Muhammad Ihsan Muhammad Yusuf Ali Musahir, Fajar Mustaan, Mustaan Nur Khaerat Nur Nur Zaman Popy Indrayani Popy Indrayani Putu Artawan, I Rachim, Fatmawaty Rahman, Muhammad Junaedy Risamawarni Risamawarni Rita Hardianti Aris Ritnawati Makbul Selfina Gala Setiawan, Asri Mulya Sri Gusty Takwin Takwin Violana Tandioga Yudha Alam , Gigih Yunus, Andi Ibrahim Zulharnah Hasan Ramli