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PERBANDINGAN KUAT TEKAN BETON DENGAN BAHAN TAMBAH LIMBAH BESI LUBANG BAUT Ngudi Hari Crista; Trias Widorini; Muhammad Latif
Teknika Vol 16, No 1 (2021): Maret
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (223.042 KB) | DOI: 10.26623/teknika.v16i1.2684

Abstract

Kurangnya pemanfaatan limbah hasil lubang baut pada baja jarang dimanfaatkan, sehingga menyebabkan pencemaran lingkungan. Dalam penelitian ini serbuk limbah tersebut digunakan sebagai bahan tambah dalam pembuatan beton sebagai usaha pemecahan masalah limbah tersebut, dengan cara meneliti seberapa jauh pemanfaatan limbah berupa serbuk baja dapat digunakan sebagai bahan tambah dalam campuran beton dengan presentase 0%, 0,00125%, 0,00625% ditinjau dari kuat tekannya.  Penelitian ini menggunakan metode eksperimen dengan benda uji berupa silinder 15cmx30cm yang ditekan pada umur 14 hari dan umur 28 hari. Setiap variasi penambahan berjumlah 3 benda uji dengan perbandingan berat antara semen : agregat halus : agregat kasar adalah 1: 3 : 5, sehingga keseluruhan benda uji berjumlah 18 buah.  Hasil penelitian menunjukkan bahwa kuat tekan karakteristik beton pada variasi penambahan 0%, serbuk baja σk = 219,302 kg/cm2, 0.00125% serbuk besi dan baja σk = 183,234 kg/cm2, 0.00625% serbuk besi dan baja σk = 200,35 kg/cm2 .Hasil tersebut menunjukkan bahwa semakin besar penambahan, maka kuat tekan beton yang dicapai semakin menurun. Hal ini disebabkan karena beberapa faktor, antara lain adanya ketidak rataan permukaan yang ditekan, serta proses pencampuran baha-bahan penyusun beton yang tidak sempurna.
ANALISA KUAT LENTUR BETON ASPAL PADA PERKERASAN LENTUR JALAN Muhammad Latif; Wardana Galih Pamungkas; Bambang Purnijanto
Teknika Vol 16, No 2 (2021): Oktober
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (343.601 KB) | DOI: 10.26623/teknika.v16i2.3714

Abstract

Kurang dimanfaatkannya limbah aspal di Laboratorium Transportasi menyebabkan pencemaran lingkungan. Dalam penelitian ini limbah aspal tersebut digunakan sebagai bahan penambahan dalam campuran beton yang merupakan salah satu solusi mengatasi masalah limbah aspal. Meneliti lebih mendetail terkait manfaat limbah aspal untuk meningkatkan kuat lentur beton. Prosentase campuran limbah aspal sebesar 10%, 12%, dan 15% dilihat dari kuat lentur.Metode Eskperimen memakai benda uji berupa balok beton berukuran 60cm x 15cm x 15cm yang ditekan pada umur yang telah di tentukan.. Setiap jenis sampel terdiri  3 benda uji dengan berat campuran yang berbeda., sehingga keseluruhan benda uji berjumlah 12 buah.Hasil pengujian kuat lentur diperoleh Beton normal pada pada hasil pengujian kuat lentur nilainya 12 Mpa, Pada berat limbah aspal 10% nilai kuat lentur didapatkan 13,30 Mpa. Berat limbah aspal 12%  nilai kuat lentur senilai  7,60 Mpa. Dan Berat limbah aspal 15% nilai kuat lentur = 5,00 Mpa
Abu Arang Sebagai Campuran Beton Dapat Mengurangi Berat Hani Purwanti; Muhammad Latif; Mudjiastuti Handajani
Teknika Vol 16, No 1 (2021): Maret
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (190.762 KB) | DOI: 10.26623/teknika.v16i1.3268

Abstract

Beton merupakan bagian konstruksi yang sangat penting, konstruksi yang mememiliki kekuatan maksimal dengan berat yang ringan perlu di kembangkan. Tujuan dari kegiatan penelitian ini untuk mengetahui seberapa besar pengaruh penambahan abu arang terhadap berat beton dan kuat tekan beton. Komposisi campuran semen yang akan digantikan dengan abu arang sebesar nol%, lima % dan sepuluh% dengan berat beton dan  kuat tekan beton yang diharapkan memiliki mutu fc=20Mpa. Metode penelitian yang digunakan yaitu metode eksperimen untuk pengambilan sampel data. Terdapat masing – masing 30 (tigapuluh) benda uji di setiap persentase penambahan abu arang. Hasil uji kuat tekan beton dengan rentang usia beton 7 hari, 21 hari dan 28 hari dalam kondisi normal tanpa campuran sebesar  20 Mpa. Kuat tekan beton yang dicampur abu arang sebanyak 5 % sebesar 21 Mpa. Pada beton campuran abu arang 10% sebesar 17 Mpa.  Kesimpulan komposisi penambahan agregat abu arang 5% bisa mengurangi berat beton sebesar 3,6% dengan nilai kuat tekan yang memenuhi.
Pelatihan Ilmu Ukur Tanah bagi Mahasiswa Universitas Muhammadiyah Semarang (UNIMUS) dan Praktisi Konstruksi Muhammad Latif; Wardana Galih Pamungkas; Hendra Masvika
Jurnal Pengabdian KOLABORATIF Vol. 2 No. 1 (2024): January
Publisher : Faculty of Engineering, Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/jpk.v2i1.6865

Abstract

Most civil engineering students and construction practitioners experience misconceptions about knowledge and even incorrect practical procedures for using measurement instruments. One of the misconceptions that is often encountered is the meaning of ordinary and extraordinary positions, the meaning of azimuth, the meaning of angles, directions, readings, and many more. Misconceptions in practice include the inaccurate process of centering, leveling, and targeting due to a misunderstanding of the pointing, targeting, and parallax processes. There are also often debates between students because of differences in interpretation of the influence of right or left rotation on horizontal readings or counting angles. On the other hand, the development of measurement and mapping surveys is increasingly rapid. However, measurement principles should not be ignored. These principles are the pillars of knowledge and the pillars of a surveyor's practice, with which fieldwork evaluations and decisions can be taken accurately and responsibly, both academically and practically. The measurement training activity using a water level tool is intended for Civil Engineering students at the Muhammadiyah University of Semarang (UNIMUS) and construction practitioners. This activity aims to improve understanding and skills so that participants can use the spirit level measuring instrument correctly. The method used is the delivery of theory, followed by practice in the field. The results obtained are an increase in participants' abilities in the measurement process and calculating measurement data based on the results of work and direct evaluation in the field.
Pelatihan Uji Nilai California Bearing Ratio bagi Mahasiswa Teknik Sipil Wardana Galih Pamungkas; Muhammad Latif; Sulistyowati Sulistyowati
Jurnal Pengabdian KOLABORATIF Vol. 3 No. 1 (2025): January
Publisher : Faculty of Engineering, Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/jpk.v3i1.8795

Abstract

CBR (California Bearing Ratio) is a soil-bearing capacity test developed by the California State Highway Department. The principle of this test is penetration testing, which inserting an object into the sample. This way, the strength of the base soil or other materials used to make road pavements can be assessed. The main problem in this report is the lack of understanding and skills of civil engineering students in conducting CBR tests, and in assessing the bearing capacity of the base soil as a foundation layer of road pavements. Students are often constrained in understanding the basic principles of CBR tests, the use of laboratory equipment, and the interpretation of test results. This activity aims to improve student understanding through a combination of theoretical learning methods, discussions, and direct practice in the laboratory using standard procedures SNI 1738-2011 and SNI 1744-2012. The implementation of the test involves soil sample preparation, CBR test penetration testing, and analysis of results through a graph of the relationship between load and penetration depth. The results show that the increase in student understanding, as evidenced by the difference in pre-test and post-test scores indicated an increase in test implementation and analysis of the results. Students who initially did not understand the procedure and importance of CBR testing are now able to use it in the context of road pavement planning. In conclusion, this training has succeeded in improving students' competence in understanding and applying CBR testing, which will support them in civil engineering practices, especially in the design and analysis of road structure resistance based on soil-bearing capacity.
Pelatihan Pembuatan Beton bagi Siswa SMK N 3 Semarang Muhammad Latif; Bambang Purnijanto; Hendra Masvika
Jurnal Pengabdian KOLABORATIF Vol. 2 No. 2 (2024): July
Publisher : Faculty of Engineering, Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/jpk.v2i2.9545

Abstract

Concrete is a solid mixture that hardens, consisting of components such as cement, sand, gravel, and water that are mixed. Civil engineering construction is related to concrete, including the construction of roads, buildings, dams, houses, and irrigation channels. Considering the importance of knowledge related to concrete, students of SMK N 3 Semarang who are majoring in construction engineering and housing need to be well informed. Many vocational high school students are still unaware of the proper process of making concrete that meets the desired quality standards. Students of SMKN 3 Semarang, who are expected to be able to work immediately after completing their studies, need to be equipped with knowledge about the concrete-making process. The purpose of this activity is to improve the knowledge of SMKN 3 Semarang students regarding the quality of concrete materials, the making of K-225 quality concrete, and the value of the concrete slump test. The PkM team from Universitas Semarang conducted training on making concrete for SMK N 3 Semarang students using discussion methods and laboratory practice. As a result of this training, the majority of students understand the process of making concrete in terms of material quality, K-225 concrete mix design, and slump test testing.