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Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Industrial & Manufacturing Engineering Social Sciences

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POTENSI KEMBANG SUSUT LAPISAN TANAH DASAR DI BANJARMASIN Ahmad Norhadi; Akhmad Marzuki; Surat
Jurnal Teknik Sipil Vol 5 No 2 (2021): Jurnal Gradasi Teknik Sipil - Desember 2021
Publisher : P3M Politeknik Negeri Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31961/gradasi.v5i2.1198

Abstract

Klasifikasi tanah di Banjarmasin pada lapisan permukaan didominasi oleh lapisan lempung sangat lunak yang akan berpotensi kembang susut tanah lempung. Hal ini merugikan stabilitas bangunan di atasnya seperti struktur badan jalan. Nilai potensi ini dapat diketahui dari nilai aktifitas (A) dan prosentase kandungan lempung (%clay) pada lapisan tanah tersebut. Dengan diketahuinya nilai A dan % clay tersebut dapat diprediksi perilaku lapisan tanah dasar sebagai fondasi struktur badan jalan dan dapat dilakukan penanganan masalah kembang susut lapisan fondasi tanah. Dalam rangka mencapai tujuan tersebut perlu dilakukan penelitian “Potensi Kembang Susut Lapisan Tanah Dasar di Banjarmasin” dengan melakukan serangkaian penyelidikan sifat fisik dan mekanik tanah di lapangan dan di laboratorium. Berdasarkan hasil penelitian di peroleh nilai activity tanah lempung di kota Banjarmasin memiliki klasifikasi aktivitas kemampuan mengembang dengan plastisitas tinggi PI > 17 adalah normal dengan rata – rata nilai activity sebesar 1.122 dan tidak aktif sebesar 0.479 dengan rentang prosentase lempung 15% - 46%. Potensi pengembangan (S) tanah lempung di Banjarmasin adalah rendah - sedang.. Potensi kembang susut memiliki potensi rentang susut 10 – 12 % atau memiliki potensi kembang susut sedang (marginal).
Variation of Cement Types Usage for Compressive Strength of Concrete Quality F'c 35 Mpa Muhammad Humaidi; Khairil Yanuar; Aunur Rafik; Herliyani Farial Agoes; Reza Adhi Fajar; Surat
Jurnal Multidisiplin Madani Vol. 3 No. 3 (2023): March 2023
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/mudima.v3i3.2640

Abstract

Various research and experiments in the field of concrete are ocurred as an effort to improve the quality of concrete, material technology and implementation techniques obtained from the results of these studies and experiments are intended to answer the increasing demands on the use of concrete and overcome the obstacles that often occur in the implementation work at outdoor. One of them is to get high quality concrete. By using a variety of types of cement. The purpose of this study was to obtain a high quality f'c 35 MPa and to find out whether the cement type PPC (gresik) and the cement type PCC (tonasa and three wheels) where this type of cement has a high compressive strength achieves a quality of f'c 35 MPa. The test object used is cylindrical in shape and the planned quality is 35 MPa which will be tested at the age of 7 days, 14 days, 28 days and 56 days. This research was carried out in the BANJARMASIN STATE POLYTECHNIC laboratory. From the results of this study with the same mixture proportions, the characteristic compressive strength for the Gresik Cement Variation (PPC) = 28.665 MPa, the Cement Tonasa Variation (PCC) = 35.779 MPa, and the Characteristic Compressive Strength for Three Wheel Cement Variations (PCC) =31,961MPa. It can be concluded that the compressive strength of the concrete characteristics of the tonal cement variation is higher than that of the Gresik and Three Roda cement variations
Co-Authors Ahmad Norhadi Akhmad Marzuki Aunur Rafik Herliyani Farial Agoes Khairil Yanuar Muhammad Humaidi Reza Adhi Fajar