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All Journal eUREKA : Jurnal Penelitian Mahasiswa Teknik Sipil dan Teknik Kimia Bangunan Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur)
Adjib Karjanto
Fakultas Teknik Universitas Negeri Malang
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Energy Engineering Industrial & Manufacturing Engineering

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PENGUJIAN MUTU AGREGAT HALUS DAN AGREGAT KASAR DARI SUNGAI SLOG-SAGAN GLENO KABUPATEN ERMERA (TIMOR-LESTE) TERHADAP KUAT TEKAN BETON maia, Jaime ximenes soares; Karjanto, Adjib; Pandulu, Galih Damar
eUREKA : Jurnal Penelitian Mahasiswa Teknik Sipil dan Teknik Kimia Vol 1, No 2 (2017)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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Abstract

Aggregate slog-sagan Gleno become an important commodity in Timor-Leste Ermera district and surrounding areas, namely as a building material. aggregates must meet various technical requirements, but as a natural ingredient quality aggregate slog-sagan Gleno Ermera district clearly much influenced by the state of the place and the environment were taken. The study was conducted in laboratory with concrete cubes 15 x 15 cm to determine the compressive strength of concrete and cylindrical with a size of 15 x 30 cm for the compressive strength of concrete compressive strength beton.dimana made 9 specimens and cylinder 9 specimens with Comparative mixture of 1 cement: Gravel 1.65: 2.47 Sand Preliminary test against the aggregate of the mountain naru showed that the water content is 0:39%, specific gravity 2:48 coarse aggregate and fine aggregate specific gravity to 2.67, the absorption of coarse aggregate by 3.23% and fine aggregate is 0.725%,. Los Angelos abrasion test machine at a speed of 30-33 rpm is 55.45%. Compressive strength of concrete at the age of 7 days converted to 28 days amounted to 197.060 Kg / cm2, Rough River Slog-sagan is used as the material quality of the concrete class 1 (Bo and B1), but for concrete grade 2 can still be used even when seen from the terms of abrasion that does not is justified, because it has been surpassed by 40% SNI requirements. Keywords: Concrete Compressive Strength, Aggregate river, slog-sagan ABSTRAK Agregat Sungai Slog-sagan Gleno menjadi komoditas penting di kabupaten Ermera dan sekitarnya, yaitu sebagai bahan bangunan, agregat harus memenuhi berbagai syarat teknis. Namun sebagai bahan alam kualitas agregat Slog-Sagan jelas banyak dipengaruhi oleh keadaan tempat dan lingkungan pengambilannya. Penelitian dilakukan dilaboratorium dengan kubus beton 15 x 15 cm untuk mengetahui kuat tekan beton dan selinder dengan ukuran 15 x 30 cm untuk kuat beton.dimana untuk kuat tekan beton dibuat kubus 9 buah benda uji selinder beton 9 buah benda uji dengan Perbandingan campuran 1 semen : 1,65 Kerikil : 2,47 Pasir. Uji pendahuluan terhadap aggregat dari gunung naru menunjukan bahwa kandungan air adalah 0.39%, berat jenis agregat kasar 2.57 dan berat jenis untuk agregat halus 2.49, penyerapan untuk agregat kasar sebesar 3.000 % dan agregat halus adalah 0,725%,. Abrasi dengan mesin Los Angelos Test pada kecepatan 30-33 rpm adalah 55.45%. Kuat tekan beton pada umur 7 hari dikonversi ke 28 hari sebesar 197,88 Kg/cm2. Kata Kunci : kualiats agregat, kuat tekan beton.
Uji Kelayakan Kualitas Pasir Namaweka dan Pasir Apung Waikomo Terhadap Kuat Tekan dan Kuat Tarik Beton Bala, Yosep; Karjanto, Adjib; Rasidi, Nawir
eUREKA : Jurnal Penelitian Mahasiswa Teknik Sipil dan Teknik Kimia Vol 2, No 1 (2018)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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ABSTRAK Agregat gunung Namawek dan pasir apung Waikomo menjadi komoditas penting di kabupaten Lembata yaitu sebagai bahan bangunan.Agregat harus memenuhi berbagai syarat teknis, namun sebagai bahan alam kualitas agregat Namaweka dan pasir apung Waikomo jelas banyak dipengaruhi oleh keadaan tempat dan lingkungan pengambilannya.Penelitian dilakukan dilaboratorium dengan menggunakan selinder beton 15 x 30 cm untuk mengetahui kuat tekan beton dan kuat tarik beton. Dimana untuk kuat tekan beton dibuat 9 buah benda uji dan kuat tarik beton 5 buah benda uji untuk masing – masing jenis material (pasir gunung Namaweka dan psir apung Waikomo) 1 Semen : 2,372 Kerikil : 1,178 Pasir. Uji pendahuluan terhadap aggregate halus dari pasir gunung Namaweka dan psir apung Waikomo menunjukan bahwa, untuk kandungan pasir gunung Namaweka air adalah 0.35%, kandungan lumpur 4,34%, JPK atau SSD 2,60 kg/cm2 , sedangkan untuk kandungan air pasir apung Waikomo adalah 0,14%, kandungan lumpur 16,18 % penyerapan 6,44%, JPK atau SSD 1,37 kg/cm2. Pengujian kuat tekan dan kuat tarik dengan mesin Los Angelos pada umur 7 hari dikonversi ke 28 hari untuk pasir gunung Nmaweka sebesar 177,33 kg/cm2, sedangkan untuk pasir apung Waikomo sebesar 57,779 kg/cm2. Untuk kuat tarik pasir gunung Namaweka sebesar 54,848 kg/cm2 dan pasir apung Waikomo sebesar 19,446 kg/cm2. Kata Kunci : kualiats agregat; kuat tekan beton; kuat tarik beton; namaweka; waikomo. ABSTRACT Aggregate Namawek Mountain and Waikomo quicksand become an important commodity in Lembata district is as a building material. Aggregate must meet various technical requirements, but as a natural ingredient aggregate Namaweka and Waikomo quicksand quality obviously heavily influenced by the state of the place and the environment were taken. The study was conducted in laboratory using a concrete cylinder 15 cm x 30 cm to determine the concrete compressive strength and tensile strength of concrete. Wheres the strength of concrete made 9 specimens and tensile strength of concrete 5 specimens for each - each type’s of material (Namaweka sand mountains and Waikomo quicksand) 1 Cement: 2.372 Gravel: 1,178 Sand.Testing a fine aggregate of sand mountains Namaweka andWaikomo quicksand shows that, for the water content of the sand mountain Namaweka is 0,35%, silt content of 4.34%, JPK or SSD 2.60 kg/cm2, while for the water contentWaikomo quicksand was 0.14%, was 16.18% silt content absorption was 6.44%, JPK or SSD 1.37 kg/cm2. Testing the compressive strength and tensile strength with engines Los Angelos at the age of 7 days converted to 28 dayssand mountain’s Nmawekawas 177,33 kg/cm2, while for Waikomo quicksand 57,779 kg/cm2. For tensile strength of Namaweka sand mountains 54,848 kg/cm2 and Waikomo quicksand 19,446 kg/ cm2. Keywords : aggregate quality; concrete compressive strength; tensile strength of concrete; namaweka; waikomo.
Pengaruh Bekas Tekukan pada Besi Beton Terhadap Lenturan Balok Karjanto, Adjib
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 1 (2018): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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Abstract

In the world of construction, especially reinforced concrete work that uses concrete steel reinforcement, there are found bends of reinforced concrete iron which is straightened to be used as reinforcement for the concrete construction. This can be justified provided that it complies with the provisions of the applicable regulations in SKSNI. From the results of this study it was found that the iron beam experienced a bend there was an influence on the load carrying capacity it received. Beams with bends in the middle of the span experience greater bending than beams without bending bends. Furthermore, the beam with concrete iron that experienced one-quarter bending of the span stretched the second place in receiving the load compared to the beam that experienced iron bending in the middle. Next the concrete beam with bending in a quarter span on both sides also experienced a decrease in the strength of its carrying capacity against the load it received. From the whole study, the normal beam load (BN) of 28.00 kN was obtained with a flexing of 5.28 mm. Whereas for concrete beams with several types of iron with bending the average deflection is 9.65 mm with the same load of about 35.33 kN.
Uji Perbaikan Retakan Dinding Akibat Geser dengan Kawat Ayam Fauziah, Rizkya Imro?atul ; Karjanto, Adjib; Djatmika, Boedya
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 1 (2018): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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Abstract

The wall is designed as a non-structural filler component but is used as a support load on it. When exposed to high earthquake vibrations, there will be diagonal cracks accompanied by a reduction in strength because Indonesia is a country that has the potential to cause earthquakes. There needs to be repairs and reinforcement on the damaged part, one of which is using a chicken wire reinforcement. This study used experimental descriptive with test specimens in the form of brick wall measuring 50 cm x 50 cm, thickness of 14 cm, and in the middle of plaster planted chicken wire. In the crack gap was given mortar. The result of study are (1) test of shear diagonal strength of brick wall without reinforcement of chicken wire obtained a mean value of 1,16 kg / cm2; (2) test of shear diagonal strength of brick wall with chicken wire strengthening obtained a mean value of 1,21 kg / cm2; (3) test of shear diagonal strength of brick wall repair with reinforced chicken wire obtained a mean value of 4.04 kg / cm2; and (4) there was significant different score at ? = 0,05 of brick wall without reinforcement, with reinforcement, and repair with chicken wire strengthening.  
Uji Kekuatan Dinding Batu Bata dengan Spesi yang Bervariasi Menerima Beban Tekan Terpusat Firmansyah, Revaldo; Karjanto, Adjib; Djatmika, Boedya
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 1 (2018): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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Abstract

Generally, bricks are used as building structural wall materials and dwelling. This study aims to find out the strength of the brick wall pairs when receiving a lumped load of the roof structure of a mixture commonly used by the community is 1 PC: 8 Sand and 1 PC : 10 Sand so as to avoid cracks in the wall due to the roof structure load. This test used  local bricks from Tumpang Malang with Model M-6B 230 mm x 110 mm x 55 mm. Another materials obtained from the building store in Malang City. The testing method used is SNI 03-4166-1996 robust test procedure for compressing red brick. The test method used is SNI 03-4166-1996 about the test procedure of compressive strength of red brick masonry wall. The dimensions of specimens is 75 x 64 cm as much as 3 samples of each thickness variation, where the thickness variation is 3 cm, 4 cm, and 5 cm so that the number of sample objects test all 18 specimens. Further test object tested press using UTM according SNI 03-4166-1996. The result showed that the average compressive strength of brick masonry wall was 1 PC : 8 Sand on variation of thickness of 3 cm, 4 cm, 5 cm, respectively by 8.26 kg/cm2, 7.63 kg/cm2, 7.4 kg/cm2. The average compressive strength of brick masonry wall of 1 PC : 10 Sand on variation in thickness of 3 cm, 4 cm, 5 cm, respectively by 8.11 kg/cm2, 6.91 kg/cm2, 6.46 kg/cm2.
KAJIAN PENAMBAHAN ABU BONGGOL JAGUNG YANG BERVARIASI DAN BAHAN TAMBAH SUPERPLASTICIZER TERHADAP SIFAT FISIK DAN MEKANIK BETON MEMADAT SENDIRI (SELF – COMPACTING CONCRETE) Nindi Fakhrunisa; Boedya Djatmika; Adjib Karjanto
BANGUNAN Vol 23, No 2 (2018): BANGUNAN EDISI OKTOBER
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (435.658 KB) | DOI: 10.17977/um071v23i22018p%p

Abstract

Pembangunan di Indonesia seperti saat ini memunculkan keperluan pemakaian beton yang cukup besar dan cepat. Upaya penyelesaian  masalah tersebut dengan membuat beton jenis self - compacting concrete. Beton SCC adalah beton yang memiliki nilai slump cukup tinggi sehingga mampu mengisi ruang-ruang sempit tanpa harus adanya pemadatan. Pembuatan beton SCC diperlukan superplasticizer atau bahan tambah lainnya. Dan pada penelitian ini beton SCC ditambahkan abu bonggol jagung dan dapat mengurangi pemakaian semen yang merupakan penyumbang polusi udara. Tujuan penelitian ini untuk mengetahui presentase unsur kimia abu bonggol jagung,  mengetahui sifat fisik beton SCC, nilai kuat tekan dan modulus elastisitas beton SCC, komposisi campuran beton SCC pada kuat tekan rencana fc’ 30 MPa, perbedaan sifat fisik dan mekanik beton SCC dengan penambahan abu bonggol jagung yang bervariasi dan, dan kadar abu bonggol jagung optimum yang menghasilkan kinerja terbaik. Metode yang digunakan pada penelitian ini adalah metode eksperimental. Dengan variasi penambahan abu bonggol jagung 0 persen, 4 persen, 8 persen, 12 persen dan superplaticizer 0,8 persen.  Benda uji yang digunakan Ø 7,5 cm x 15 cm sebanyak 60 benda uji dan Ø 15 cm x 30 cm sebanyak 8 benda uji. Pengujian beton SCC dilakukan dengan menguji sifat fisik berupa slump flow, berat volum, porositas, sedangkan sifat mekanik yaitu kuat tekan yang dilakukan pada umur 7, 14, dan 28 hari dan modulus elastisitas pada umur 28 hari. Hasil Penelitian didapatkan (1) Presentase kimia abu bonggol jagung yang dominan yaitu pada unsur kalium sebesar 81,2 persen, (2) Hasil pengujian sifat fisik beton SCC dengan penambahan abu bonggol jagung memenuhi persyaratan dari masing-masing pengujian, (3) Nilai kuat tertinggi umur 28 hari didapatkan pada kadar abu bonggol jagung 4 persen sebesar 36,25 MPa, dan nilai modulus elastisitas umur 28 hari didapatkan pada kadar abu bonggol jagung 4 persen sebesar 20.078,37 MPa, (4) Campuran beton SCC kadar 4 persen dan 8 persen umur 28 hari melebihi fc’ 30 MPa. (5) Uji hipotesis berat volume, porositas, dan kuat tekan tidak terdapat perbedaan yang signifikan, namun pada modulus elastisitas ada perbedaan secara signifikan dengan Sig kurang dari 0,05. (6) Kadar abu bonggol jagung yang menghasilkan kinerja terbaik adalah pada kadar 4 persen. Kata Kunci: abu bonggol jagung, beton SCC, sifat fisik, sifat mekanik 
Co-Authors Bala, Yosep Djatmika, Boedya Fauziah, Rizkya Imro?atul Firmansyah, Revaldo Galih Damar Pandulu maia, Jaime ximenes soares Nawir Rasidi Nindi Fakhrunisa