Muhammad Ali Akoeb
Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Published : 3 Documents
Articles

Found 3 Documents
Search

PENGARUH DISTRIBUSI TULANGAN GESER TERHADAP KUAT GESER BETON RINGAN BUSA BERSERAT NYLON DENGAN METODE PUSH - OFF Akoeb, Muhammad Ali; Abdullah, Abdulah
Jurnal Teknik Sipil Vol 3, No 1 (2013): Jurnal Teknik Sipil Volume 3, Nomor 1, September 2013
Publisher : Department of Civil Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to determine the effect of the distribution of shear reinforcement to shear strength fiber nylon foam lightweight concrete. Specimens used for testing the push - off is a Z - shaped concrete shear reinforcement that has been given by Av ( extensive reinforcement total ) = 113.08 mm2 , and a cylindrical specimen of 15 cm diameter and 30 cm high. Specimens were tested after the age of 28 days. The dimensions of the push - off test specimen is 20x10x30 cm. Push - off test specimens reinforced with 4Ø12 to avoid collapse in the neck specimen. Shear reinforcement placed according to the distance plans , and by means of welded dikat. Tests include lightweight concrete compressive strength test fiber foam, split tensile strength test of lightweight foam concrete fiber , steel tensile strength test to determine the quality of steel used, as well as lightweight foam concrete shear test berserat.Hasil testing shows the relationship between shear stress with tensile strength as well as strong he stressed. Vserat value ( shear stress due to the contribution of fiber ) used was 1.08 kg/cm2 and Vs ( shear stress due to the contribution of steel ) ) is 11.6 kg/cm2nilai contributions donated by the reinforcement fibers and obtained from previous studies . In this research also found the effect of reinforcing the widespread distribution of the total reinforcement ( Av ) is the sam . From these results obtained percentage value of shear stress against compressive strength with reinforcement 1Ø12 is 19.793 %, 25.574 % is 4Ø6 reinforcement , and 9Ø4 is 27.173 %. Difference in percentage of shear stress on split tensile strength is at 1Ø12 2.44% , 74.13 % and 85.21 % at 4Ø6 on 9Ø4 . Results shear push - off test specimen with reinforcement 1Ø12 is 49 250 kg/cm2, 4Ø6 is 55.470 kg/cm2 , and 9Ø4 is 59,000 kg/cm2 , it is known that the more the distribution of reinforcement will increase the shear stress fiber lightweight concrete foam .
PERBANDINGAN KUAT TEKAN BETON NORMAL DAN BETON DENGAN BAHAN ADDITIVE SILICA FUME ANTARA UJI NON DETRUCTIVE DENGAN UJI DESTRUCTIVE (SUATU PENELITIAN BETON DENGAN FAKTOR AIR SEMEN 0,45 ; 0,50 DAN 0,55) Akoeb, Muhammad Ali
Jurnal Teknik Sipil Vol 1, No 1 (2011): Volume 1, Nomor 1, September 2011
Publisher : Department of Civil Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract: Purpose of this riset was to determine the value of concrete compressive strength ratio between non-destructive testing of ultra-sonic test method and hammer test with a destructive test is a standard charge of testing. The samples used in the form of a standard cube size 15 cm x 15 cm x 15 cm of 72 specimens consisting of 36 specimens of normal Concrete and 36 specimens  for concrete with the addition of silica fume as much as 9% by weight of cement. Tests conducted on the compressive strength of concrete cube specimens with FAS (Factor Air Cement) variation 0.45, 0.50, and 0.55. Specimens tested at ages 7, 14, and 28 days with the three methods of testing. The result showed that the compressive strength of normal concrete in FAS 0.45 for ultra-sonic testing and hammer tests compared with standard tests have an average ratio value β1 (β ultrasonic) of 1.079 and β2 (β Hammer) of 0.555 in fas 0, 50, the average ratio value β1 ((β ultrasonic) obtained at 0.956 and β2 (β Hammer)  equal to 0.592. At 0.55 fas obtained an average ratio value β1 (β ultrasonic) of 1.586 and β2 (β Hammer) equal to 0.74.While the strength of concrete with the addition of silica fume on fas 0.45 for ultrasonic testing and Hammer compared with a standard load test has an average ratio value β1 (β ultrasonic) and 1.02 for β2 (β Hammer) equal to 0.726. In fas 0.5 average ratio value β1 (β ultrasonic) obtained at 1.026 and β2 (β Hammer) of 0.690. At 0.55 fas obtained an average ratio value β1 (β ultrasonic) of 1.102 and β2 (β Hammer)B2  of 0.83.Keywords : Ultrasonic Test, Hammer Test, Non Destructive Test, Destructive Test, Compressive Strength of Concrete,  Silica Fume.Abstrak: Tujuan penelitian ini adalah untuk mengetahui nilai perbandingan kuat tekan beton antara uji non destructive berupa metode ultrasonic test dan hammer test dengan uji destructive yaitu pengujian pembebanan standar. Benda uji yang digunakan berupa kubus standar ukuran 15 cm x 15 cm x 15 cm, sejumlah 72 buah benda uji yaitu 36 benda uji untuk beton normal dan 36 benda uji untuk beton dengan tambahan silica fume sebanyak 9 % dari berat semen. Pengujian kuat tekan dilakukan terhadap benda uji kubus beton dengan variasi faktor air semen dan umur benda uji. Benda uji  kubus beton untuk faktor air semen 0,45 ; 0,50 dan 0,55 diuji pada saat benda uji berumur 7, 14 dan 28 hari dengan ketiga metode pengujian. Dari hasil penelitian diperoleh bahwa kuat tekan beton normal pada FAS 0,45 untuk pengujian ultrasonik dan hammer dibandingkan dengan pengujian pembebanan standar mempunyai nilai perbandingan rata-rata β1 (β ultrasonic) sebesar 1,079 dan  β2 (β hammer) sebesar 0,555. Pada FAS 0,50,  nilai perbandingan rata-rata β1 (β ultrasonic) yang diperoleh sebesar 0,956 dan β2 (β hammer) sebesar 0,592. Pada FAS 0,55 diperoleh nilai perbandingan rata-rata β1 (β ultrasonic) sebesar 1,586 dan β2 (β hammer) sebesar 0,740. Sedangkan kuat tekan beton additive silica fume pada FAS 0,45 untuk pengujian ultrason
PENGARUH VARIASI PENAMBAHAN AIR DAN SEMEN PADA SUATU PERENCANAAN CAMPURAN (MIX DESIGN) TERHADAP SUSUT BETON DAN KUAT TARIK BELAH BETON (SUATU PENELITIAN BETON DENGAN FAS 0,3, 0,4 DAN 0,5) Aulia, Teuku Budi; Akoeb, Muhammad Ali
Jurnal Teknik Sipil Vol 3, No 1 (2013): Jurnal Teknik Sipil Volume 3, Nomor 1, September 2013
Publisher : Department of Civil Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Note that the addition of cement in mixing concrete will increase the strength of concrete when water is added only if the concrete strength will be decreased but increased workabilitas concrete . This study aims to determine the effect of the addition of water and cement for concrete and tensile strength dropped concrete sides . Test substance used for testing concrete and tensile strength decreased Shopping concrete cylinder diameter is 15 cm; 30 cm high by 72 . Cement Water Factor (FAS ) used are 0.3 , 0.4 and 0.5 . In this research is the addition of water and cement 0 % , 10 % , 20 % and 30 % respectively for the FAS. Where for every percentage increase in water and cement made 6 test objects . Testing is done in the space fell sheltered by looking at the results of curtailment reading on the dial gauge test objects . Shop tensile strength testing done at 28 days , with an increase of 1 ton each . Stretching things a test read tranducer tool mounted on the frame gauge connected to a data logger tool . The results showed that the decreased stretch of concrete increases with the increase in the percentage of water and cement penambahaan done , while for increased tensile strength of the concrete sides of the optimum place on the addition of water and cement by 20 % for each of his FAS . The analysis of variance showed that there was significant influence between the percent increase in water and cement to the sides of the concrete tensile strength .