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Karakteristik Beton Mutu Tinggi Dengan Komposisi Slag dan Agregat Halus Batu Gamping Dicaprio Resen Bunga'; Frans Phengkarsa; Desi Sandy
Paulus Civil Engineering Journal Vol 3 No 2 (2021): Paulus Civil Engineering Journal Volume 3, Nomor 2, Juni, 2021
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

In general, fine aggregate and coarse aggregate as the main components of concrete come from nature so that one day it will run out, alternative substitutes are needed. One of the alternative materials is Nickel Slag. Nickel slag is a type of rock dumped from the nickel industry. Limestone is also used as an alternative to fine aggregate. This study aims to determine the strength of concrete and the relationship between the characteristics of the concrete using nickeI sIag and limestone as a substitute for fine aggregate to the quality of the concrete. As for the variations of 0%, 10% and 20% and the percentage of using limestone as a substitute for fine aggregate is 10%. The method of mixing the concrete uses the SNI-03-2834-2000 method with a planned concrete quality of 42Mpa. From this research, it was found that the compressive strength of concrete with variations of 0%, 10% and 20% were respectively 42.360 MPa, 42.347 MPa and 41.781 MPa, the split tensile strength test with variations of 0%, 10% and 20% respectively was equal to 3.94 MPa, 3.064 MPa and 2.293 MPa and the flexural strength testing with variations of 0%, 10% and 20% were respectively 4.242 MPa, 4.068 MPa and 3.179 MPa. The relationship of split tensile strength for the variation of Nickel Slag variations 0%, 10%, and 20% is 9,242%, 7,178%, and 7% of the compressive strength, respectively, the relationship of split tensile strength for the variation of Nickel Slag variations 0%, 10%, and 20% of 0.65, 0.62, and 0.57 of compressive strength, respectively. From the resuIts of the study, it was concIuded that the concrete mixture with nickel and limestone slag substitution resulted in a decrease in strength as the percentage of nickel slag substitution increased.

Pengaruh Penggunaan Pasir Putih Sebagai Bahan Campuran Beton Mutu Tinggi Meisye Mitha Siranga; Suryanti Rapang Tonapa; Frans Phengkarsa
Paulus Civil Engineering Journal Vol 3 No 3 (2021): PCEJ, Vol.3, No.3, 2021
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

The use of concrete in Indonesia cannot be separated from skyscrapers, bridges with long spans, and underground buildings which generally have a larger load, so the use of high-strength concrete is necessary. This study aims to determine the value of compressive strength, split tensile strength, flexural strength, modulus of elasticity of concrete and determine the workability of fresh concrete with the addition of 0.8% superplaticizer. The test objects used in the form of cylinders with a diameter of 15 cm and a height of 30 cm as many as 15 pieces, and 3 pieces of blocks measuring 15 cm × 15 cm × 60 cm. From the results of the study, the compressive strength value was 43,007 MPa. The split tensile strength test is 3.584 MPa. The flexural strength test is 4,340 MPa. The elastic modulus test is 28447.956 MPa. From the slump test on fresh concrete with the addition of a superplaticizer, it is obtained by 10 cm.

The Influence of Sangkaropi' and Sandblasting Mining Aggregate on Concrete Mikel Paa; Frans Phengkarsa; Lisa Febriani
Paulus Civil Engineering Journal Vol 4 No 1 (2022): Volume 4 No.1, Maret 2022
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

Concrete is a composite building material made from a combination of aggregate and cement binder. The most common form of concrete is Portland cement concrete, which is composed of mineral aggregate, cement and water. It is usually believed that concrete dries after mixing and laying. In increasing the strength or quality of concrete, the coarse aggregate used comes from the Sangkaropi mine because in addition to the rare use of aggregate there, the Sangkaropi mine stone also contains minerals such as calcium oxide, silica dioxide, aluminum oxide. By adding materials, both in coarse aggregate and fine aggregate, as a substitute for binders and some as additional materials to increase the adhesion of binders in concrete, one of them is using sandblasting material in the concrete mixture. This is because sandblasting is a natural material whose raw materials contain less than 0.1 percent almandite and silica, which means that sandblasting does not contain hazardous and toxic materials (B3). The variations used are 0%, 5%, and 10%. The tests carried out were the compressive strength test, split tensile strength test, and the flexural strength test with a concrete quality of 25 MPa. From the results of this study, the compressive strength values were 26.502 Mpa, 28.389 Mpa and 31.878 Mpa. In the split tensile strength test, the values obtained were 1.721 Mpa, 2.146 Mpa, 2.617 Mpa and the flexural strength test obtained values of 1.837 Mpa, 2.341 MPa, and 2,696 MPa.

Pengaruh Sandblasting Dan Limbah Gypsum Sebagai Bahan Campuran Beton Daniel Surgawi; Frans Phengkarsa; Suryanti Rapang Tonapa
Paulus Civil Engineering Journal Vol 4 No 2 (2022): Paulus Civil Engineering Journal Volume 4 No.2
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

Normal concrete is concrete with a compressive strength value of 15-40 MPa.this study aims to find out the workability of fresh concrete with the addition of sandblasting 10% and gypsum waste variations of 0%, 2%, 4%, 6% in concrete mixtures. Samples with a cylindrical shape with dimensions of 15cm x 30cm total 12 pieces, as well as beams with dimensions of 15cm x 15cm x 60cm total of 3 pieces. In the strong press test process obtained numbers 26,020, 24,027, 23,469 and 21,161 Mpa. Testing tensile strengths of 2,712, 2,098, 1,745, and 1,462 Mpa. Tests of 4,119, 3,793, 3,585, and 3,230 MPa. Elasticity modulus testing of 22384, 20497, 20025, and 19132 MPa. The results showed that gypsum waste cannot be used as a concrete quality mixture material.

Pengaruh Silica Fume dan Pecahan Batu Marmer Sebagai Bahan Subtitusi Pada Campuran Beton Elli Mercy Julmile; Frans Phengkarsa; Suryanti Rapang Tonapa
Paulus Civil Engineering Journal Vol 5 No 1 (2023): Paulus Civil Engineering Journal, Volume 5, No.1
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/pcej.v5i1.588

The aim of this study was to determine the effect of using silica fume and marble stone fragments as substitution materials in concrete mixtures on split tensile strength, concrete flexural strength and compressive strength.. Testing test objects are split tensile strength, bending strength, and compressive strength. In this study, the quality of concrete is planned, which is 25 MPa.From the results of the study, the compressive strength value of concrete for variations in marble fragments was 50% and Silica Fume was 0%, 10%, 12.5% and 15%, namely 25,175 MPa, 25,832 MPa, 24,606 MPa and 24,229 MPa, testing the tensile strength of splits for variations in marble fragments by 50% and Silica Fume by 0%, 10%, 12.5% and 15% was 1,886 MPa, 1,909 MPa, 1,862 MPa and 1,815 MPa, bending strength test for variations in marble shards by 50% and Silica Fume by 0%, 10%, 12.5% and 15% by 25,175 MPa, 25,832 MPa, 24,606 MPa and 24,229 MPa. The effect of the substitution of marble fragments as coarse aggregates by 50% and the substitution of silica fume as cement with variations of 0%, 10%, 12.5% and 15% on the values of compressive strength, tensile strength, and bending strength of concrete obtained the maximum value of silica fume substitution at a variation of 10% and decreased in strength above the variation of silica fume 10%, the higher the percentage of silica fume substitution, the lower the strength of concrete.

Pengaruh Limbah Serbuk Kayu Mahoni Sebagai Subtitusi Agregat Halus Sebagai Campuran Beton Tria Mahyuni Palian; Frans Phengkarsa; Luciana Buarlele
Paulus Civil Engineering Journal Vol 5 No 1 (2023): Paulus Civil Engineering Journal, Volume 5, No.1
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/pcej.v5i1.592

Sawdust is a waste from sawing wood which is often found in furniture manufacturing places such as doors, windows, frames, cabinets, and others. Often the waste from sawdust causes problems in its use which has a negative impact on the environment. In this study, mahogany sawdust was used as an additive in the concrete mixture, where mahogany sawdust was relatively cheap and easy to obtain. The purpose of this study was to determine the effect of variations of mahogany wood powder with mahogany wood powder added as a concrete mixture by testing compressive strength, split tensile, and flexural strength with design concrete quality 20 MPa. The research was conducted at the Structure and Materials Laboratory, Department of Civil Engineering. The type of research carried out is experimental using the SNI method. Based on the results of tests that have been carried out in cylinder and beam specimens on several variations of mahogany sawdust 0%, 4%, 8% and 12%, the compressive strength values are 20,216 MPa, respectively. 19.750 MPa, 19.074 MPa and 18.111 MPa, the split tensile strength values are 2.287 MPa, 2.004 MPa, 1.768 MPa and 1.509 MPa for flexural strength, the values are 2.645 MPa, 2.491 MPa, 2.157 MPa and 1.720 MPa. From the results of the study the use of mahogany sawdust as a concrete mixture can affect the strength of concrete, where the strength of the concrete decreases based on the added variation, the higher the variation of mahogany sawdust is added, the strength of the concrete will decrease.

Studi Eksperimental Penggunaan Abu Ampas Tebu dan Limbah Karbit sebagai Material Subtitusi Semen pada Campuran Beton Adam Creflo Rombe; Frans Phengkarsa; Lisa Febriani
Paulus Civil Engineering Journal Vol 5 No 1 (2023): Paulus Civil Engineering Journal, Volume 5, No.1
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/pcej.v5i1.595

Research on construction technology continues to be developed with the aim of utilizing carbide waste and bagasse ash as a substitute for cement in the manufacture of normal quality concrete. The purpose of this study was to determine the value of testing the compressive strength, split tensile strength and flexural strength with substitute materials from carbide waste and sugarcane ash 0%, 4%, 8% and 12%. The American concrete method was used in the manufacture of test objects. institute (ACI). The test is carried out when the concrete has passed the maintenance period of 7, 21 and 21 days. From the results of this study, the compressive strength values of concrete at 28 days of age with variations of 10% carbide waste and 0%, 4%, 8% and 12% bagasse ash were 26.044 MPa, 16.042 MPa, 14.626 MPa and 14.248. The split tensile strength test results with 10% waste and 0%, 4%, 8% and 12% bagasse ash were 2.288 MPa, 1.77 MPa, 1.533 MPa and 1.486 MPa. The results of the flexural strength test with a variation of waste 10% and bagasse ash 0%, 4%, 8% and 12% were 3.030 MPa, 2.568, 2.414 and 2.362. The results of this study indicate that the higher the addition of carbide waste and bagasse ash, the lower the compressive strength, split tensile strength and flexural tensile strength of concrete.

Penggunaan Blast Slag Nickel Sebagai Pengganti Agregat Kasar Pada Beton Geopolimer Mega Paembonan; Frans Phengkarsa; Suryanti Rapang Tonapa
Paulus Civil Engineering Journal Vol 5 No 1 (2023): Paulus Civil Engineering Journal, Volume 5, No.1
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/pcej.v5i1.597

Geopolymer concrete is concrete that uses polymeric materials as a binder between aggregates. One of the polymer materials is fly ash. Blast slag nickel is waste from industrial plants that produce nickel. In the concrete compressive strength test, the highest test value was obtained at the age of 28 days for the 17,5% variation, which was 33,498 Mpa, for the 15% variation, it was 32,272 Mpa, and for the 0% variation, it was 31,045 Mpa. The split tensile strength test of concrete obtained the highest test value obtained at the 1,.5% variation of 2,972 Mpa, the 15% variation of 2,760 Mpa, and the 0% variation of 2,619 Mpa. Testing the elastic modulus of concrete obtained the highest modulus of elasticity obtained at 17,5% variation of 37287,135 Mpa, 15% variation of 35900,552 Mpa, and 0% variation of 32113,473 Mpa The use of nickel blast slag as a substitute for coarse aggregate and the use of fly ash on geopolymer concrete paste affects the values of compressive strength, split tensile strength, and modulus of elasticity of concrete. Where the more variations of fly ash used, the resulting value of compressive strength, split tensile strength, and modulus of elasticity of concrete increases.

Pemanfaatan Calcium Carbide dan Bottom Ash sebagai Bahan Subtitusi pada Beton Ermita Datu Puang; Frans Phengkarsa; Lisa Febriani
Paulus Civil Engineering Journal Vol 5 No 1 (2023): Paulus Civil Engineering Journal, Volume 5, No.1
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/pcej.v5i1.604

The purpose of this research is to find out how to use calcium carbide and bottom ash as substitution materials in concrete. Where calcium carbide is a colorless chemical compound with the chemical formula (CaC2), and the calcium carbide that is often used is generally gray or brown in color. while bottom ash is bottom ash that is released under the combustion furnace from the remaining coal combustion. The percentage of using 10% calcium carbide as a substitute for cement and bottom ash as a substitute for fine aggregate is 25%, 30% and 35%. In this study, a cylindrical specimen was used with a diameter of 15 cm and a height of 30 cm, and a block with a size of 15 cm × 15 cm × 60 cm. The method used in this study is the ACI (American Concrete Institute) method with a planned concrete quality of 30 MPa. The compressive strength test results at 28 days obtained results at variations of 25%, 30% and 35%, namely 30,951 MPa, 31,328 MPa, and 32,838 MPa. The split tensile strength test results at variations of 25%, 30% and 35% were 2.878 MPa, 2.972 MPa and 3.161 MPa. The results of the flexural strength test at variations of 25%, 30% and 35% are 3,338 MPa, 3,390 MPa, 3,441 MPa. The test results show that the use of calcium carbide and bottom ash substitution complies with the 30 MPa quality plan.

Pengaruh Serbuk Besi Dan Natrium Silika Serta Natrium Hidroksida Terhadap Beton Yosua Kevin Jordan Randa; Frans Phengkarsa; Desi Sandy
Paulus Civil Engineering Journal Vol 5 No 1 (2023): Paulus Civil Engineering Journal, Volume 5, No.1
Publisher : Program Studi Teknik Sipil UKI Paulus-Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/pcej.v5i1.609

The use of iron filings as a partial substitute for sand in concrete mixes is an alternative to reduce iron filings waste which can pollute the environment. This study used iron powder and sodium silica and sodium hydroxide in the concrete mixture which aims to determine the effect of the mechanical properties of the resulting concrete. In this study, a series of process stages were carried out which included testing material characteristics and then planning the composition of the concrete mix withmix design as well as making test specimens in the form of cylinders with a size of 15 cm x 30 cm as many as 48 test objects and blocks with a size of 60 cm x 15 cm x 15 cm as many as 12 test objects then testing the test objects with a predetermined concrete age of 7 days, 21 days , and 28 days.From the results of the study using iron filings with variations of 0%, 10%, 15%, 20%, the compressive strength values were 25.146 MPa, 18.514 MPa, 17.505 MPa and 16.770 MPa, while the tensile strength values obtained were 2.642 MPa, 1.463 MPa , 1.415 MPa, 1.345 MPa and the flexural strength values obtained were 2.642 MPa, 1.463 MPa, 1.415 MPa and 1.345 MPa respectively. The results above show that the use of iron powder and sodium silica and sodium hydroxide can reduce the mechanical properties of concrete.

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