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Frans Phengkarsa
Fakultas Teknik Sipil Universitas Kristen Indonesia Paulus
Civil Engineering, Building, Construction & Architecture Transportation

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Pemanfaatan Bottom Ash Sebagai Bahan Substitusi Agregat Halus Terhadap Kekuatan Beton Agnes Claudia Posedung; Frans Phengkarsa; Desi Sandy
Paulus Civil Engineering Journal Vol 2 No 3 (2020): Volume 2, No.3, September 2020
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (550.712 KB) | DOI: 10.52722/pcej.v2i3.142

Abstract

Bottom ash is the result of coal combustion which can be useful for the use of concrete mix constituents. In this study, bottom ash is used as a substitute for fine aggregate in the manufacture of concrete. Bottom ash has a larger and heavier grain size with a characteristic dark gray color. The purpose of this study was to determine the strength of concrete using bottom ash as a substitute for fine aggregate. The percentage of the use of bottom ash as a substitute for fine aggregate is 0%, 25%, and 35%. The research was conducted at the Laboratory of Material Technology, Paulus University of Indonesia Christianity. The test objects used were 36 cylinders with a diameter of 15 cm and a height of 30 cm. Tests conducted in the form of compressive strength test, split tensile strength test, and modulus of elasticity test with a concrete quality plan of 30 MPa. From the research results, for the compressive strength test results obtained the optimum bottom ash variation at the use of 35% bottom ash with a compressive strength of 33,764 MPa at the age of 28 days, the split tensile strength test obtained the optimum variety of bottom ash at the use of bottom ash 35% with split tensile strength. of 3,253 MPa at the age of 28 days while the highest modulus of elasticity was obtained at the addition of 35% bottom ash which was 27332.0255 Mpa. And the percentage of split tensile strength relationship for bottom ash variation is 0%, 25%, and 35% of 8.007%, 8.983%, and 9.635% of the compressive strength, respectively. This value meets or is by following per under with what is determined, namely the average ranges from 7% to 11% of the compressive strength with an average of around 9%. From the variation of bottom ash, namely 0%, 25%, and 35% in cylindrical specimens, which reaches f'c 30 Mpa is bottom ash with a variation of 35% and can be used as a substitute for fine aggregate.
Penggunaan Agregat Kasar Batu Gunung Salubue Terhadap Beton Mutu Tinggi Deo Saldi Tanga; Frans Phengkarsa; Desi Sandy
Paulus Civil Engineering Journal Vol 3 No 1 (2021): Volume 3, No.1, Maret 2021
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (419.198 KB) | DOI: 10.52722/pcej.v3i1.197

Abstract

Aims of this study is to determine the characteristics and high quality concrete of coarse aggregate originating from Mount Salubue. The test uses a cylindrical specimen with a height of 30 cm with a diameter of 15 cm and a beam of 60 x 15 x 15 cm, on the mechanical properties of the concrete. The number of specimens is 20 cylindrical specimens and 4 beam specimens. The design of the composition of the constituent materials of concrete uses the SNI 03-2834-2000 method. The results showed that the relationship between compressive strength and split tensile strength is 7.323% to the compressive strength value, and the relationship between compressive strength and flexural strength is 11.104% to the compressive strength value. The characteristics of the coarse aggregate of Mount Salubue meet the SNI standards as a concrete mixture and meets the compressive strength of the plan.
Pemanfaatan Limbah Cangkang Telur Sebagai Bahan Substitusi Semen Pada Beton Agnes Sentani Klau; Frans Phengkarsa; Olan Jujun Sanggaria
Paulus Civil Engineering Journal Vol 3 No 4 (2021): Volume 3 No.4 Desember 2021
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (370.535 KB) | DOI: 10.52722/pcej.v3i4.327

Abstract

Technological developments can have positive and negative impacts on everyday human life. The most common negative impact is the waste generated from every human activity. Most of this waste is simply dumped into nature without treatment. One of the most common waste found is eggshell waste. The amount of eggshell waste continues to increase, but it is not managed and not used optimally so that the waste needs to be processed, such as utilizing the eggshell waste in a concrete mixture. This study aims to determine the effect of using eggshell waste as a cement substitution material with variations of eggshell waste powder of 0%, 4%, 6% and 8% on the strength of the concrete. The quality of the concrete plan (f'c) in this study is 25 MPa. From the results of the study, the compressive strength of concrete was 27.351 MPa, 25.842 MPa, 23.201 MPa and 21.504 MPa, the value of the split tensile strength of concrete was 2.712 MPa, 2.499 MPa, 2.264 MPa and 2.146 MPa, the value of the modulus of elasticity. concrete were 21912,043 MPa, 17437.327 MPa, 14447,336 MPa and 12290.684 MPa, respectively. From the results of this study, it is known that concrete using eggshell waste powder as a cement substitution material with variations of 0% and 4% can meet the quality of the concrete plan.
Studi Eksperimental Beton Mutu Normal Dengan Agregat Batok Kelapa Dan Terak Nikel Putri Aprilia; Frans Phengkarsa; Benny Kusuma
Paulus Civil Engineering Journal Vol 3 No 4 (2021): Volume 3 No.4 Desember 2021
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (630.625 KB) | DOI: 10.52722/pcej.v3i4.346

Abstract

This study aims to determine the value of compressive strength, split tensile strength, flexural strength, and modulus of elasticity in normal quality concrete with variations of coconut shell and nickel slag added materials in coarse aggregate. Making test objects in the form of cylinders 150 mm x 150 mm x 300 as many as 27 pieces and beams 150 mm x 150 mm x 600 mm as many as 9 pieces. The results showed that the addition of coconut shells and nickel slag to coarse aggregate for testing concrete with a mixture of 30% nickel slag and 20% coconut shells obtained values for the 28th day of compressive strength, namely 30,841MPa, 31,124MPa and 31,690MPa, strong Split tensile strength is 3,114MPa, 3,468MPa and 3,255MPa, respectively, the flexural strength values are 4,383MPa, 4,018MPa and 3,930MPa, respectively. And for the modulus of elasticity, the values obtained are 12763,274MPa, 15404,333MPa, and 13619,275MPa.
Co-Authors Agnes Claudia Posedung Agnes Sentani Klau Benny Kusuma Deo Saldi Tanga Desi Sandy Olan Jujun Sanggaria Putri Aprilia