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All Journal MEKTEK Journal of the Civil Engineering Forum Journal of Applied Engineering and Technological Science (JAETS) Paulus Civil Engineering Journal
Andi Arham Adam
Universitas Tadulako
Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering Transportation

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PENGGUNAAN ABU TERBANG BATUBARA PADA PEMBUATAN BATAKO DI KOTA PALU Mashuri, Mashuri; Adam, Andi Arham; Rahman, Rahmatang; Setiawan, Arief
MEKTEK Vol 14, No 3 (2012)
Publisher : MEKTEK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (188.265 KB)

Abstract

One cause of the poor quality of some concrete blocks in the city of Palu is the lack of cement used in the concrete block. This is caused by the high price of cement so that income of concrete blocks maker decreases. To find a way out of these problems, a lot of waste material that can be used in the manufacture of concrete block, one of which is coal fly ash. The purpose of this activity is to introduce the use of coal fly ash in the manufacture of concrete block to business partners of  the concrete block makers in Palu city. The purpose of this activity is to make concrete block business group partners can increase their income without compromising quality concrete block produced.Activity counseling / coaching and mentoring manufacturing concrete block using coal fly ash has been done to the concrete block makers. To facilitate the implementation of the concrete block-making, each made the graduated graduated barrel of sand, cement and coal fly ash graduated. To facilitate the implementation of the concrete block-making, made barrel graduated ie graduated sand, cement and coal fly ash graduated. The composition of the mixture is introduced to the partners is 0.75 sacks of cement: 0.25 sacks of coal fly ash and ± 300 kg of sand or 1 cement barrel dose: 1  coal fly ash barrel dose and 2  sand barrels doses. The results of this activity is to get that quality of concrete blocks produced by using coal fly ash strongly increased compressive strength but does not increase the quality of concrete blocks (Remain quality II). This activity was also found that any use of the three sacks of cement will result in an additional gain of ± 130 concrete blocks. This indicates that the use of coal fly ash in the manufacture of concrete blocks to provide added value to the concrete blocks makers.
THE EFFECT OF CONTROLLED PERMEABILITY FORMWORK WITH DIFFERENT CURING METHODS ON THE DURABILITY CHARACTERISTICS OF CONCRETE Adam, Andi Arham
MEKTEK Vol 12, No 3 (2010)
Publisher : MEKTEK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (374.41 KB)

Abstract

Controlled Permeability Formwork (CPF) can be used to improve the strength, durability and appearance ofconcrete. This is achieved by allowing excess water and gas to escape at the surface adjacent to theformwork. This paper reports a study aimed at assessing whether such permeable formwork can be used toreduce curing times whilst maintaining durability and strength characteristics. An experimental study isdescribed where trial walls are constructed and tested at various ages following different curing periods andregimes. Results are presented that compare the outcomes of using permeable membrane with those of usinga traditional formwork. Comparisons of durability characteristics are were. The durability of the walls wasassessed by techniques such as: permeability; and water absorption. Results are presented in terms of howdifferent curing regimes can be employed to achieve equivalent characteristics. A discussion of how suchtechniques may be used to reduce construction time is presented.
The Effects of Water to Solid Ratio, Activator to Binder Ratio, and Lime Proportion on the Compressive Strength of Ambient-Cured Geopolymer Concrete Andi Arham Adam
Journal of the Civil Engineering Forum Vol. 5 No. 2 (May 2019)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1613.29 KB) | DOI: 10.22146/jcef.43878

Abstract

Low calcium fly ash based Geopolymer has been proven to be one of the potential alternatives substitutes to Portland Cement not only due to its high resistance to chemical attack but also because of the vast availability of class F fly ash for raw materials. However, one of the limitations of geopolymer as the alternative binders in concrete is that the strength develops slowly under ambient condition. This paper presented the investigation of water to solid ratio, activator to binder ratio, and lime proportion on the compressive strength of ambient-cured geopolymer concrete. To develop sufficient strength at an early age, class F fly ash and slaked lime (Ca (OH)2) were used as the binder with the proportion of lime to binder of 4%, 5%, 6%, and 7%. The blended binder was activated by sodium silicate and sodium hydroxide solution with the variation of activator to binder ratio of 0.45, 0.5, 0.55, and 0.6.  The water to solid ratio of 0.30, 0.31, 0.32, and 0.33 was chosen to facilitate good workability which was done by adding water to the mix. The compressive strength tests were conducted at 7, 14, and 28 days on the cylindrical concrete specimens with a dimension of 100 mm diameter and 200 mm height. The results show that the activator to binder ratio of 0.50 to 0.55, and the proportion of lime to the binder of 6% to 7% were the optimum range value. It was also found that the lower the water to cement ratio the higher the compressive strength and the water to solid ratio as low as 0.3 produced the highest compressive strength while still maintaining good workability.
Design of Comprehensive Monitoring on Hybrid Photovoltaic and Thermoelectric Generator Using IoT Yuli Asmi Rahman; Andi Arham Adam; Samnur Samnur; Basri Basri; Khairil Anwar; Rustan Hatib; Mustofa Mustofa
Journal of Applied Engineering and Technological Science (JAETS) Vol. 6 No. 1 (2024): Journal of Applied Engineering and Technological Science (JAETS)
Publisher : Yayasan Riset dan Pengembangan Intelektual (YRPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37385/jaets.v6i1.5764

Abstract

The study aims to design and develop a more efficient measurement monitoring system based on influential parameters for the performance of hybrid PV and TEG modules using IoT with the Thingspeak application. The parameters measured include the PV top and bottom surface temperatures and output current and voltage, the surface temperatures of the TEG's hot and cold sides, their respective current and voltage outputs, air humidity, and solar intensity. This IoT-based monitoring system experimental method utilizes two types of PV, polycrystalline and monocrystalline, each rated at 50 Wp, in a hybrid configuration with 5 TEG modules attached to the back of the solar panel. The monitoring design results indicate that sensor measurements were accurate and data readings were reliable. The temperature difference between the two sides of the TEG was measured up to 21.7°C, and the hybrid efficiency of the monocrystalline PV with TEG showed better results compared to the polycrystalline setup, achieving optimum efficiency above 6%, with the PV surface temperature maintained at an average of 50°C. Additionally, IoT monitoring revealed the effect of air humidity on TEG performance: lower air humidity resulted in a larger ?T, peaking at 21.7°C with humidity at 39.1%. Therefore, this study recommends using IoT technology for observational data collection on system performance, particularly for PV and TEG, with sensor component modifications tailored to the characteristics of the targeted sensor object.
Pengaruh Rasio Air–Pengikat terhadap Waktu Pengikatan dan Kuat Tekan Pasta Geopolimer Wahidin, Suci Amalia Namira; Rasyid, Moh. Iqbal; Adam, Andi Arham; Akifa, Sri Nur; Ramadhan, Bayu Rahmat
Paulus Civil Engineering Journal Vol. 7 No. 3 (2025): Paulus Civil Engineering Journal V7N3 2025
Publisher : Universitas Kristen Indonesia Paulus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/kad1vv33

Abstract

Penelitian ini bertujuan untuk mengevaluasi pengaruh rasio air terhadap bahan pengikat terhadap waktu pengikatan dan kuat tekan pasta geopolimer berbasis abu terbang tipe F dari PLTU Mpanau, Palu, dengan penambahan kapur padam (Ca(OH)₂) sebesar 10% dari berat bahan dasar. Aktivator yang digunakan terdiri dari sodium silikat dan sodium hidroksida, serta air murni tanpa kandungan mineral. Variasi dosis Na₂O yang digunakan adalah 6%, 8%, dan 10%, dengan rasio air terhadap bahan pengikat bervariasi dari 0,24 hingga 0,42. Benda uji berbentuk silinder berdiameter 2,5 cm dan tinggi 5 cm, dengan pengujian kuat tekan dilakukan pada umur 3, 7, 14, dan 28 hari. Hasil menunjukkan bahwa setiap dosis Na₂O memiliki rentang rasio air terhadap bahan pengikat tertentu yang menghasilkan waktu pengikatan ideal. Dosis Na₂O 10% menunjukkan rasio optimal antara 0,26 – 0,34, sedangkan pada dosis 8% optimum terjadi pada rasio 0,42, dan pada dosis 6% berada pada kisaran 0,38 – 0,40. Kuat tekan tertinggi sebesar 22,68 MPa diperoleh pada dosis Na₂O 10% dengan rasio air terhadap bahan pengikat sebesar 0,28 pada umur 28 hari.
Performa Kuat Tekan Mortar Geopolimer Berbasis Fly Ash dengan Variasi Rasio Alkali Aktivator: Performa Kuat Tekan Mortar Geopolimer Berbasis Fly Ash dengan Variasi Sri Nur Akifa; Akifa, Sri Nur; Tikara, Medi; Adam, Andi Arham; Ramadhan, Bayu Rahmat; Wahidin, Suci Amalia Namira
Paulus Civil Engineering Journal Vol. 7 No. 3 (2025): Paulus Civil Engineering Journal V7N3 2025
Publisher : Universitas Kristen Indonesia Paulus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/3y5tev29

Abstract

Penelitian ini bertujuan untuk mengevaluasi pengaruh variasi komposisi alkali aktivator terhadap kuat tekan mortar geopolimer berbasis abu terbang tipe F. Abu terbang diperoleh dari PLTU Mpanau dan diaktivasi menggunakan kombinasi Sodium Silikat (Na₂SiO₃) dan Sodium Hidroksida (NaOH). Benda uji berupa mortar berbentuk kubus berukuran 50 × 50 × 50 mm, dengan rasio massa abu terbang terhadap pasir sebesar 1 : 2,75 dan rasio air terhadap padatan (w/s) sebesar 0,35. Variasi dosis aktivator yang digunakan adalah 25%, 40%, dan 55% terhadap berat abu terbang, dengan perbandingan Sodium Silikat terhadap total aktivator (W/A) sebesar 0; 0,3; 0,5; 0,7; dan 1. Pengujian kuat tekan dilakukan pada umur 3, 7, 14, dan 28 hari untuk mengevaluasi perkembangan kekuatan mekanik seiring waktu. Hasil menunjukkan bahwa peningkatan dosis aktivator dan nilai W/A secara signifikan mempengaruhi karakteristik kuat tekan mortar. Kuat tekan optimum sebesar 24,72 MPa tercapai pada komposisi dosis aktivator 55% dan rasio W/A 0,5 pada umur 28 hari. Nilai tersebut menunjukkan bahwa mortar geopolimer dengan komposisi tersebut memiliki potensi untuk diaplikasikan sebagai elemen struktural alternatif yang ramah lingkungan.
Co-Authors Akifa, Sri Nur Arief Setiawan Basri Basri Khairil Anwar Mashuri Mashuri Mustofa Mustofa Rahmatang Rahman Ramadhan, Bayu Rahmat Rasyid, Moh. Iqbal Rustan Hatib Samnur . Sri Nur Akifa Tikara, Medi Wahidin, Suci Amalia Namira Yuli Asmi Rahman