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All Journal Jurnal Sains dan Teknologi Jurnal Sains dan Teknologi
M. Nuklirullah
Universitas Jambi
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Studi Perbandingan Penambahan Palm Oil Fuel Ash (Pofa), Rice Husk Ash (Rha), dan Fly Ash (Fa) Terhadap Daya Serap Air dan Kuat Tekan Bata Ringan Melati Panjaitan; M. Nuklirullah; Fetty Febriasti Bahar
Jurnal Sains Dan Teknologi | E-ISSN : 3063-9980 Vol. 3 No. 1 (2026): Juli - September
Publisher : GLOBAL SCIENTS PUBLISHER

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Abstract

Cellular Lightweight Concrete (CLC) is a widely used construction material due to its lightweight properties, good thermal insulation, and ease of application. However, the high cement content required in CLC production contributes to increased carbon emissions and production costs. This study aims to analyze the effect of Palm Oil Fuel Ash (POFA), Rice Husk Ash (RHA), and Fly Ash (FA) as partial cement replacements on the water absorption and compressive strength of CLC lightweight bricks. The research employed a laboratory experimental method with a quantitative approach. Cement substitution levels of 5%, 7.5%, and 10% were applied for each type of ash. The tests included fine aggregate characterization, water absorption, and compressive strength in accordance with applicable standards. The results indicate that POFA, RHA, and FA have different effects on the properties of CLC lightweight bricks. Certain substitution levels improved compressive strength and reduced water absorption compared to normal CLC bricks, whereas excessive substitution tended to reduce mechanical performance due to the decreased amount of active cement. Therefore, POFA, RHA, and FA have significant potential as environmentally friendly supplementary cementitious materials for producing sustainable lightweight concrete with improved engineering properties.
Pengaruh Penggunaan Limbah Lokan Untuk Teknologi Bata Ringan Terhadap Nilai Kuat Tekan Bulan Asa Aulia; M. Nuklirullah; Fetty Febriasti Bahar
Jurnal Sains Dan Teknologi | E-ISSN : 3063-9980 Vol. 3 No. 1 (2026): Juli - September
Publisher : GLOBAL SCIENTS PUBLISHER

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Abstract

Meningkatnya limbah industri dan pertanian mendorong pemanfaatan material alternatif yang ramah lingkungan pada bidang konstruksi, salah satunya melalui penggunaan Palm Oil Fuel Ash (POFA), Fly Ash, dan abu sekam padi sebagai bahan substitusi semen pada bata ringan. Penelitian ini bertujuan menganalisis pengaruh penggunaan ketiga bahan tersebut terhadap kuat tekan bata ringan serta menentukan komposisi optimum yang menghasilkan kekuatan tertinggi. Metode penelitian yang digunakan adalah eksperimen laboratorium densgan variasi penambahan bahan substitusi sebesar 0%, 5%, 10%, dan 15%. Pengujian meliputi karakteristik agregat halus, analisis X-Ray Fluorescence (XRF) bahan tambah, perancangan campuran (mix design), pembuatan benda uji, proses curing selama 28 hari, serta pengujian kuat tekan menggunakan Universal Testing Machine (UTM). Hasil penelitian menunjukkan bahwa seluruh material memenuhi persyaratan standar pengujian. Analisis XRF menunjukkan bahwa Fly Ash memiliki kandungan silika tertinggi sebesar 82,66%, diikuti POFA sebesar 48,37% dan abu sekam padi sebesar 33,33%. Variasi penambahan Fly Ash sebesar 5% menghasilkan kuat tekan tertinggi yaitu 12,422 MPa, lebih tinggi dibandingkan bata ringan normal sebesar 9,342 MPa. Sebaliknya, peningkatan kadar substitusi hingga 10% dan 15% menyebabkan penurunan kuat tekan akibat berkurangnya jumlah semen sebagai bahan pengikat utama. Dengan demikian, penggunaan Fly Ash sebesar 5% merupakan komposisi optimum yang mampu meningkatkan kuat tekan bata ringan sekaligus mendukung pemanfaatan limbah lokal sebagai material konstruksi yang ramah lingkungan.
Penilaian dan Prediksi Indeks Kualitas Air Sungai Asam, Kota Jambi Lailal Gusri; Lilis Suryani; Shally Yanova; Bambang Irawan; M. Nuklirullah
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 3 (2025): Juni 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i3.5133

Abstract

The water quality of rivers can deteriorate due to the large amount of pollutants entering the river. Water quality assessments provide an overview of the actual state of water quality. The WQI can provide valuable information about the water quality of rivers. The calculation of the water quality index is carried out because there is a high probability that other parameters also exceed the quality standards, which are not considered when calculating the water quality index. Therefore, it is very important to assess the water quality of the river. The objective of this study was to assess the water quality of the Asam River, Jambi City. The research methodology involved collecting water samples from the Asam River at locations I (upstream), II (middle) and III (downstream) and testing the samples in the laboratory. Indices were analyzed using WQI for the following variables: temperature, total suspended solids (TSS), pH, BOD, COD, nitrate, total phosphate, dissolved oxygen and fecal coliforms. The method using WQI to determine water quality classification values ​​can serve as a reference for problem solving and evaluation of water pollution management. The results based on the calculations resulted in a WQI value of 96,27 at location II (middle); 70,95 at location I (upstream) and 186,01 at location III (downstream). The results of the study on the water quality of the Asam River are as follows: 1) very low water quality, 2) low quality water and 3) unfit for drinking water, posing a risk to aquatic life and human health.
Co-Authors Bambang Irawan Bulan Asa Aulia Fetty Febriasti Bahar Gusri, Lailal Lilis Suryani Melati Panjaitan Yanova, Shally