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All Journal Jurnal Bahan Alam Terbarukan Semesta Teknika Jurnal Teknologi Agroindustri JURNAL SELULOSA FLUIDA JURNAL VOKASI TEKNOLOGI INDUSTRI (JVTI) Majalah Tegi Jurnal Inovasi Pendidikan dan Sains
Edwin K Sijabat
Teknologi Pengolahan Pulp Dan Kertas - Institut Teknologi Sains Bandung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics Social Sciences

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Journal : Semesta Teknika

 1 
Utilization of Grits and Dreg Wastes for Ceramics Raw Material Edwin Kristanto Sijabat; Andrie Harmaji; Rafida Khoirani
Semesta Teknika Vol 25, No 2 (2022): NOVEMBER 2022
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v25i2.14832

Abstract

This research utilizes dreg and grits wastes from pulp industry by addition of kaolin as raw material in producing ceramics that have good physical and mechanical properties. Dreg and grits were prepared by drying in an oven at 120°C for 5 hours, then crushed and sieved using a 200 mesh sieve, then characterized by means of Inductively Coupled Plasma (ICP). Ceramic samples were printed using Compressive Gauge Testing with a strength of 15 kN for 60 seconds. The kaolin percentage was varied between 20-80% followed by drying for 48 hours at room temperature. The ceramic samples were burned in a stepwise furnace temperature of up to 1000°C with a holding time of 30 minutes. Their physical properties, i.e. density, porosity, fuel loss, and water absorption, were characterized, and their compressive strength was investigated. The ICP test showed that the highest chemical content in the dreg and grit is CaO, at 36% and 50%. The optimum dose of ceramics produced in this study is the composition of 80% kaolin. The percentage of kaolin mixture is directly proportional to the compressive strength, density and fuel shrinkage, while the porosity and water absorption are inversely proportional. The ceramic characterization was obtained with compressive strength ranging from 4.48 MPa to 11.98 MPa.
Mechanical and Physical Properties of Cement Mortar with Recausticizing Solid Byproduct Sijabat, Edwin Kristianto; Harmaji, Andrie; Hendriansyah, Hendriansyah
Semesta Teknika Vol. 27 No. 2 (2024): NOVEMBER
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v27i2.15429

Abstract

The Kraft process is a method used to make paper pulp. This method produces cooking residue that can be recycled again. The recausticizing process produces large amounts of by-products.This research utilizes solid waste from causticizing from the pulp industry as a partial substitute for Portland cement for mortar raw material to obtain a material with good mechanical properties. The solid waste was pulverized, then characterization of Loss on Ignition (LOI), Inductively Coupled Plasma (ICP), Titration, and Total Titrable Alkali was carried out. The percentage of solid waste resulting from recausticizing as a substitute for cement is 0-100%, with a water-cement ratio (w/c) of 0.3. The mixed material is then printed into a 50x50x50mm mold followed by drying using the moist curing method. The hardened samples were tested for Density, Porosity, Water Absorption, and Compressive Strength. Mortar with partial cement replacement with 20-100% solid waste recousticizing produces a compressive strength of 1.3-22.6 MPa. The resulting water absorption ranges from 14.59-31.35%.
Co-Authors Ajeng Nimatul Hidayah Andrie Harmaji Basuki Tri Prijadi Harmaji, Andrie Hendriansyah, Hendriansyah Iqbal Novanka Ristiawan Marjanu Priambodo Muhammad Ridho Rafida Khoirani Samsul Arifin Sriwedari, Daisy A Surya Adelia Sakti Tetania Ade Putri Tri Prijadi Basuki