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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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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 â 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 typeâs 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 mountainâs 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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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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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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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.

Uji Kuat Tekan dan Uji Kuat Tarik Beton Dengan Agregat Kasar dan Halus dari Sumba Barat Daya pada Mutu Beton = 19,3 MPa Lolo , Wilfridus Muri ; Karjanto , Adjib; Ningrum, Diana
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 2 (2019): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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The use of fine aggregates and coarse aggregates in Southwest Sumba Regency as composers of concrete mixes for construction work in general is still dependent on sea sand and natural gravel (mountain rocks) whose potential is quite large. This research aims to; 1) knowing the characteristics of sea sand and natural gravel (mountain rocks) of West Sumba 2) knowing the compressive strength of concrete and tensile strength produced from sea sand and natural gravel (mountain rocks) Southwest Sumba; This study is a sample-based laboratory study and analysis of the characteristics of aggregate and compressive tests. Southwest Sumba aggregates generally meet the requirements for testing aggregate characteristics. Southwest Sumba sea sand with equipment modulus 3,214 and entering zone 2 (sand somewhat coarse) and coarse aggregate (Southwest Sumba gravel) with fineness modulus 4.65 and entering zone.40 mm. The highest compressive strength of concrete from the age of the concrete to the end is obtained from Southwest Sumba sea sand with a compressive strength of 17,486 MPa (7 days concrete age), 26,901 MPa (28 days concrete age).

PENGARUH PENGGANTI SEBAGIAN SEMEN DENGAN ABU AMPAS TEBU TERHADAP KUALITAS MORTAR BERDASARKAN KUAT TEKAN DAN PENYERAPAN AIR Wiyono, Adi; Karjanto, Adjib; Pandulu, Galih Damar
eUREKA : Jurnal Penelitian Teknik Sipil dan Teknik Kimia Vol 1, No 1 (2017)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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Bagasse is the result of the abundant waste from the sugar manufacturing process (± 30% of milling capacity). Abundant bagasse has been used as fuel boiler (a tool to produce steam at a certain amount per hour with a certain pressure and temperature). The burning of bagasse has elements that are useful to increase the strength of mortar, because it has properties of siliceous pozzolan and very prominent. This research was conducted with the aim of utilization of bagasse ash for cement replacement in making mortar, with alternate variations bagasse ash 0%, 2%, 4%, 6%, 8% and 10%. The results showed that the lowest water absorption in a mixture of 8% variation with the results of 1.54% and an average compressive strength of mortar greatest present in 8% with an average compressive strength of 25.04 MPa Keywords: bagasse ash, mortar, compressive strength, absorption ABSTRAK Ampas tebu merupakan hasil limbah buangan yang berlimpah dari proses pembuatan gula (± 30% dari kapasitas giling). Ampas tebu yang berlimpah tersebut telah dimanfaatkan sebagai bahan bakar ketel uap (alat untuk memproduksi uap pada jumlah tertentu setiap jamnya dengan tekanan dan suhu tertentu). Pembakaran ampas tebu memiliki unsur yang bermanfaat untuk peningkatan kekuatan mortar, karena mempunyai sifat pozzolan dan mengandung silika yang sangat menonjol. Penelitian ini dilakukan dengan tujuan pemanfaatan abu ampas tebu untuk pengganti semen dalam pembuatan mortar, dengan variasi pengganti abu ampas tebu 0%, 2%, 4%, 6%, 8% dan 10%. Hasil penelitian menunjukkan bahwa penyerapan air yang paling rendah pada variasi campuran 8% dengan hasil rata-rata 1,54 % dan kuat tekan mortar yang paling besar terdapat pada 8% dengan kuat tekan rata-rata 25,04 Mpa. Kata kunci: abu ampas tebu, mortar, kuat tekan, penyerapan

Perkuatan pada Balok Beton Berlubang di Daerah Tekan yang Mengalami Lenturan dengan Mortar Geoplimer Karjanto , Adjib; Djatmika, Boedya; Susanto, Prijono Bagus
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 2 (2019): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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In its development, changes in building functions often occur so as to require flexible bending of building functions, ways are needed to provide reinforcement or repairs to hollow beams. One method in strengthening or repairing hollow beams is the grouting method. Grouting using geopolymer material has the advantage of great strength and faster setting time. These geopolymer properties are very suitable for grouting methods that require fast setting times and small shrinkage. In this study the test uses a beam measuring 100 X 20 X 15 cm with 10 M NaOH molarity Comparison of the activator, as well as the location and number of holes, 2 points in the bending area to determine the flexural strength and condition of the concrete after reinforcement (grouting). Where in this study used 9 pieces of reinforced concrete beams (3 normal beams, 3 porous beams, 3 reinforced beams). Normal beams have an average bending capacity of 149.777 kg / cm2, while hollow beams have an average bending capacity of 118.36 kg / cm2, and repaired / grouting beams have an average bending capacity of 139.022 kg / cm2. There is a difference in the average flexural capacity in normal beams of 149.777 kg / cm2 in hollow beams of 118.36 kg / cm2, which has a difference of 31.41 kg / cm2 (20.97%). There is a difference in the average flexural capacity in the grouting beam of 139.022 kg / cm2 in the hollow beam of 118.36 kg / cm2, which has a difference of 20.66 kg / cm2 (14.86%). In a statistical analysis with a significance of 0.05 there was no significant difference in flexural strength in reinforced concrete grouting blocks 131.11 kg / cm2 against normal beams, 149.77 kg / cm2 had a difference of 10.755 kg / cm2 in a percentage of 7.19%.

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

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

EKSPERIMENTAL MOMEN-LENDUTAN BALOK KANTILEVER BAJA CANAI DINGIN DENGAN VARIASI JUMLAH SEKRUP Nindyawati Nindyawati; Gede Agung Shri Parta; Adjib Karjanto; Wahyo Hendarto Yoh
BANGUNAN Vol 27, No 2 (2022): BANGUNAN EDISI OKTOBER
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um071v27i22022p7-16

Abstrak:Momen lentur dan lendutan pada struktur baja canai dingin erat kaitannya dengan model sambungan yang dipergunakan. Sambungan yang termasuk klasifikasi flexible dan semi-rigid didapatkan dari pengamatan yang dilakukan. Pada paper ini karakteristik dari variasi sambungan dan pengaruhnya diamati dengan metode eksperimental menggunakan benda uji single profile yang dimodelkan sebagai balok kantilever. Hasil studi menunjukkan bahwa penambahan jumlah sekrup turut meningkatkan momen lentur maksimum yang dapat diterima struktur. Akan tetapi hasil analitis dan hasil ekperimen menunjukkan ketidaksesuaian di mana struktur masih belum dapat menerima beban secara optimal.Kata-kata kunci: sambungan, kapasitas lentur, momen lentur, lendutanAbstract: Bending moments and deflections in cold rolled steel structures are closely related to the connection model used. Connections that are classified as flexible and semi-rigid are obtained from observations made. In this paper, the characteristics of connection variations and their effects are observed by experimental method using a single profile specimen which is modeled as a cantilever beam. The results of the study show that increasing the number of screws also increases the maximum acceptable bending moment of the structure. However, the analytical results and experimental results show a discrepancy where the structure is still not able to accept the load optimally.Keywords: connection, flexural capacity, bending moment, deflection

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