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All Journal Portal: Jurnal Teknik Sipil JURNAL TEKNIK SIPIL UNAYA Jurnal Teknologi
Aiyub Aiyub
POLITEKNIK NEGERI LHOKSEUMAWE
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Materials Science & Nanotechnology Mechanical Engineering

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PENGGUNAAN VARIASI UKURAN DIAMETER BUTIR MAKSIMUM AGREGAT KASAR TERHADAP KUAT TEKAN BETON Aiyub Aiyub
Portal: Jurnal Teknik Sipil Vol 3, No 1 (2011)
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/portal.v3i1.497

Abstract

This study aims to determine the use of variations in the size of the maximum grain diameter of coarse aggregate on compressive strength of concrete with fas 0.45 by cylindrical test specimen size 15 x 30 cm. Planning mix desing using a modified method of ACI with fas value of 0.45 and the value of the planned 75-100 mm slump. This study includes compressive strength performed at age 7 days and 28 days, treatment is normally carried out with care marinade soaked in the tub for 7 days and 28 days. Compressive strength test results obtained in the test specimen 7 days old premises gravel size is 20.50 Mpa 12.5 mm, 19 mm, 16.99 MPa, 16.76 MPa is 25 mm and 31.5 mm was 14.57 Mpa , while the age at 28 days was 30.51 MPa 12.5 mm, 19 mm, 24.86 MPa, 21.85 MPa is 25 mm and 31.5 mm was 21.66 Mpa. So the smaller the aggregate maximum compressive strength used was obtained by the higher and conversely the greater the maximum aggregate used dihasikan compressive strength lower. keywords: compressive strength, maximum grain diameter
PENGARUH PENGGUNAAN ABU SEKAM PADI DENGAN KONDISI KADAR AIR AWAL TERHADAP SIFAT POROSITAS BETON PERFORMA TINGGI Aiyub Aiyub
Portal: Jurnal Teknik Sipil Vol 13, No 1 (2021): Edisi April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/portal.v13i1.2276

Abstract

Perkembangan industri konstruksi di Indonesia cukup pesat hampir 60% material yang digunakan dalam pekerjaan konstruksi adalah beton. Penggunaan abu sekam padi (ASP) sebagai bahan pengganti sebagian semen karena kandungan silica yang tinggi didalamnya adalah pilihan  terbaik karena dapat mengurangi limbah sekam padi. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan abu sekam padi pada beton terhadap sifat porositas melalui pengujian  water absorbtion, sorptivity, dan permeability. 20% berat semen disubtitusikan dengan ASP kemudian kadar airnya divariasikan sebanyak 0%, 10%, 20% dari air pencampuran beton. Kode pencampuran beton ASP disebut dengan  ASP20-0, ASP20-10, dan ASP20-20. Mix design yang digunakan adalah metode Department of Environment (DoE) dengan nilai slump direncanakan 180 mm. Benda uji yang digunakan yaitu silinder ukuran 100x200 mm dan kubus 100x100x100 mm, sebanyak 16 benda uji. Hasil water absorption pada usia benda uji 1,3,7, dan 28 hari menujukkan penyerapan air paling rendah adalah beton  ASP20-20 sebesar 0,062% menurun 0,003% dari beton normal 0,065%. Hasil pengujian sorptivity menunjukkan nilai penurunan pada 28 hari pada beton normal (OPC) sebesar 0,0049 mm/mm0,5, dan nilai penyerapan ASP20-20 yaitu sebesar 0,0079 mm/mm0,5. Nilai permeabilitas menunjukkan bahwa ASP20-20 adalah beton paling baik dengan pori-pori beton paling kecil dibandingkan dengan beton normal dari beton campuran ASP lainnyan. Hal ini dapat dilihat dari hasil pengujian permeability dengan waktu rembesan terlama selama 19 jam dari waktu pengujian 24 jam dengan tekanan 30 bar.
Pengaruh Variasi Konsentrasi Larutan Naoh 6m Dan 8m Terhadap Penurunan Caco3 Pada Mortar Geopolimer Berbahan Dasar Fly Ash Nagan Raya Aiyub Aiyub; Lia Ramadhaniati; Fajri Fajri
Jurnal Teknik Sipil Unaya Vol 7, No 1 (2021): Januari 2021
Publisher : Center for Research and Community Service (LPPM) University of Abulyatama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30601/jtsu.v7i1.1505

Abstract

The combination of NaOH and Na2SiO3 in an alkaline solution is able to react with FA  to form Si-O-Si and Si-O-Al gels. Several studies have shown that the high concentration of NaOH causes the appearance of calcium carbonate (CaCO3) on the surface of the specimen. This problem became the concern of this study, the reduction NaOH concentration was investigated to reduce CaCO3. The results showed that the chemical composition of FA Nagan Raya (FANR) contained Si, Al, and Ca compounds which were respectively around 37.16%, 17.61%, and 8.72%. XRD analysis shows that the main peaks of the FANR material and paste are in the 20 to 30 2θ region. FTIR analysis showed that the peak of the band 1380cm-1 - 1450cm-1, showed that the CaCO3 was bent in the FANR paste. The TGA analysis shows that the weight loss of FANR paste is higher than material of FANR. Low NaOH concentration has decreasing workability which causes faster setting time and reduces compressive strength. However, the use of a low concentration of NaOH solution can reduce CaCO3 on the surface of spesimen.
Pengaruh Penggunaan Ternary Blend Fly Ash Dengan Volume Tinggi dan Abu Sekam Padi Terhadap Kuat Tekan Beton Mutu Tinggi Sofa Rizki; Syamsul Bahri; Sulaiman Sulaiman; Hanif Hanif; Aiyub Aiyub; Cut Yusnar
Jurnal Teknologi Vol 21, No 2 (2021): Oktober 2021
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (127.509 KB) | DOI: 10.30811/teknologi.v21i2.2433

Abstract

This study aims to find the effect of ternary blended: cement, fly ash (FA), and rice husk ash (ASP) on the compressive strength of high-strength concrete.  The composition of FA and ASP used for cement replacement were 0%, 10% ASP, 30% FA, 10% ASP+30% FA, 10% ASP+40% FA, and 10% ASP+50% FA.  The water-cement factor (FAS) and binder used are 0.3 and 500 kg/m3 fresh concrete, respectively.  The specimens used for compressive strength is cubes of 100×100×100 mm with tests at the age of 1, 3, 7, 28, and 56 days.  The results showed that the use of 10% ASP increased the compressive strength of the concrete compared to the control concrete but required more superplasticizers.  The use of 30% FA as a cement substitute showed a decrease in compressive strength compared to control concrete but reduced the use of superplasticizer.  The use of a combination of FA and ASP as a substitute for cement showed a decrease in compressive strength under control concrete and concrete using 30% FA.  The decrease in the compressive strength of concrete with the combination of ASP and FA is beyond the initial expectation.  This may be due to the disproportionate use of FA compared to ASP so that the reaction that occurs is not optimal to form calcium silicate hydrate (CSH).  However, the use of ternary blended cement, FA, and ASP still has added values which is better workability than without using FA.
Perbandingan Karakteristik Mortar Geopolimer Berbahan Dasar Fly Ash Nagan Raya Terhadap Mortar Konvensional Dengan FAS 0,5 Aiyub Aiyub
Jurnal Teknik Sipil Unaya Vol 8, No 2 (2022): Juli 2022
Publisher : Center for Research and Community Service (LPPM) University of Abulyatama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30601/jtsu.v8i2.3100

Abstract

Alumina (Al) and silica (Si) compounds in Nagan Raya fly ash (FANR) greatly affect the characteristics of geopolymer mortar so that it can be compared to conventional mortar using OPC Semen Padang (OPCSP) with FAS 0.5. This study aims to obtain the optimum composition of geopolymer mortar using Nagan Raya fly ash, so that it can be compared to conventional mortar using OPC with FAS 0.5. This test is carried out using the parameters of workability, setting time and compressive strength in conventional mortar. Alkaline solution was prepared using 10M NaOH solution, the ratio of alkaline solution to FANR was 1.0 and 1.1, respectively, with the ratio of Na2SiO3 to NaOH 2, respectively; 2.5; 3; and 3.5. The results show that the optimum workability of geopolymer mortar is 19.15 cm where this workability is close to the workability of conventional mortar of 19.2 cm, the optimum setting time of geopolymer mortar is 165 minutes where this setting time is close to the conventional mortar setting time of 191 minutes and the optimum compressive strength of mortar. geopolymer obtained at 28.86 MPa where the compressive strength is close to the compressive strength of conventional mortar of 34.38 MPa. So that geopolymer mortar based on FANR is still feasible to use and has a characteristic approach to conventional mortar made from OPCSP with FAS 0.5.
Co-Authors Cut Yusnar Fajri Fajri Hanif Lia Ramadhaniati Sofa Rizki Sulaiman Sulaiman Syamsul Bahri