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All Journal FORUM BANGUNAN Journal of Geoscience, Engineering, Environment, and Technology sCEj– : Sustainable Civil Engineering Journal
mardiana amir, mardiana
Politeknik Negeri Ujung Pandang
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science Physics Transportation Other

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PERBANDINGAN KUAT TEKAN BETON DENGAN MENGGUNAKAN ALAT UJI TEKAN DAN PALU BETON Amir, Mardiana; Kombong, Wenys; Idris, Muhammad
FORUM BANGUNAN Vol 11, No 2 (2013)
Publisher : Universitas Negeri Makassar

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Abstract

Testing method using a laboratory test machine press basically gives an accurate value for the specimen made up destroyed. While the test method test hammer (hammer concrete) made with infact burden (impact) on the surface of the concrete by using a mass that is activated by using a certain amount of energy in concrete construction, for example on the beam. The purpose of this study was to determine differences in the average compressive strength of the resulting test press until crushed (using a pressure test) and a test based infact press (using a hammer concrete). To test the field Test Hammer made of reinforced concrete beams (15cmx20cm x 200cm) made 1 piece samples (tested the left side, right and center. Subsequently the specimen was care for 27 days and testing of compressive strength at 28 days. Directions vertical concrete test hammer down α = - 90. Based on test results obtained in this study: average compressive strength - flat with a hammer and a concrete cylinder specimen gives the smallest value is: 263.7 kg/cm2. Compressive  average using Hammer Concrete and concrete beam specimen gives a higher value, namely: 288.5 kg/cm2.Compressive press average using engine compression test gives the highest value, 300.9 kg/cm2. Average ratio between using compressive strength machine  and  using test tools hammer concrete: 1.043 (beam specimen) and 1, 141 (cylindrical specimen). 
Analisis Kinerja Biaya dan Waktu pada Pembangunan Pasar Sentral Kabupaten Majene Sulawesi Barat amir, mardiana
FORUM BANGUNAN Vol 11, No 1 (2013)
Publisher : Universitas Negeri Makassar

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In this study the authors use a method that is based on the concept of the value of the three indicators , namely : BCWS , BCWP , and ACWP . Budgeted Cost of Work Schedule ( BCWS ) , and identification method variance , thus producing estimates the cost and the length of time until the end of the execution of a project . The results showed Based on the concept of the value of the method can be concluded that the project 12 weeks experienced a gain of Rp 1,425,418,200 ( BCWP - ACWP ) or 15 % of the total cost of the project budget and project implementation faster one week of the project plan . Based on the indicators available at the time of reporting that at week 12 , it can be concluded that the Cost Variance obtained is Rp . 1,325,418,200.00 which shows that ( CV > 0 ) means the project cost less than the cost of the plan ( experience gains ) and Schedule Variance obtained is Rp . 688,761,000.00 which shows that ( SV > 0 ) means the project run faster than the planning time. Keywords : cost, time, BCWS , BCWP , and ACWP
Investigation of Aquifer Model to Potential of Ground Movement at Brau Village, Kota Wisata Batu, Jawa Timur, indonesia Maha Agung, Putera Agung; Gautama, Gregorius Aryoko; Istiatun; Amir, Mardiana; Adinegara, Aldo Wirastana; Eko Wiyono; Wacono, Sidiq
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 3 (2025): JGEET Vol 10 No 03 : September (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.3.16836

Abstract

Soft soils at Brau Village area, Kota Wisata Batu (KWB) usually form in alluvial highlands due to weathering of sedimentary rocks. An upper and lower aquifer of sandy layer exist between soft soil. Groundwater pools into aquifer layers and infiltration from surface water into the soft soil layers (clayey and/ or silty) generated a ground movement potential. Study will elaborate the behavior of layers of clayey and/ or silty separated by 2 (two) aquifer layers in detail causing some damages to infrastructure. Wall and/ or floor cracks at school buildings and collapse and/ or differential settlement in road pavement  are a failure of soil layers due to high pore water pressure coming from direction of aquifer zone especially during rainy season. Pore water pressures were determined by rate of settlement prediction from consolidation laboratory analyzed by Ying et al (2015) and actual measurement using electromagnetic data. Research results found that gradually increment of pore water pressure would exceed a total stress in reducing an effective stress drastically and created a location of initial ground movement at the toe of slope around infrastructure area. High pore water pressure due to the increment of water volume at aquifer layer can push down soil layers with safety factor (SF) < 1.0. At the same time, ground movement would generate cracks > 10 cm width at wall and floor of school building structure; and collapse or differential settlement occurred in road construction > 18 cm depth due to bonding agent separated between soil particles.
Penentuan Waktu dan Biaya dengan Metode Time Cost Trade Off (TCTO) (Studi Kasus: Proyek Residence Kostel Cendekia Makassar) Amir, Mardiana; Asik, Jhon; Pakihi, Arthalia Mustakim
Sustainable Civil Engineering Journal Vol 1 No 2 (2025): Volume 1 Nomor 2 2025
Publisher : Department of Civil Education FT UNM

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Waktu dan biaya adalah faktor penting yang berpengaruh pada kelancaran progress dalam proyek. Apabila terdapat kendala pada biaya, maka hal tersebut berpengaruh pada durasi (waktu) penyelesaian proyek. Sebaliknya, waktu penyelesaian yang terlambat berpotensi pada pembengkakan biaya. Latar belakang proyek Residence Kostel Cendekia Makassar awalnya direncanakan pada Agustus 2019 dan ditargetkan untuk selesai pada Juli 2021. Namun, terjadi pandemi yang mempengaruhi biaya pelaksanaan sehingga proyek tersebut berhenti untuk sementara di Juli 2020 sambil membuat rencana penyesuaian dengan tahun terbaru. Tujuan penelitian ini adalah untuk mendapatkan waktu yang efektif serta biaya yang optimal menggunakan dua skenario penambahan waktu kerja (lembur) dan penambahan tenaga kerja dengan metode Time Cost Trade Off (TCTO) pada proyek pembangunan Residence Kostel Cendekia Makassar. Hasil dari penelitian ini adalah penerapan kedua skenario terhadap percepatan waktu pada kegiatan yang bersifat kritis, penambahan waktu kerja dengan 1 jam lembur mengurangi durasi pelaksanaan proyek sebanyak 7 hari dan untuk skenario penambahan tenaga kerja dapat mempercepat waktu proyek sebanyak 11 hari. Penambahan biaya setelah kedua skenario ini diterapkan, penulis mendapatkan kesimpulan bahwa dengan menggunakan skenario 1 (penambahan waktu kerja 1 jam lembur) memiliki penambahan biaya sebesar Rp.12.377.202,00 dan untuk skenario 2 (penambahan tenaga kerja) mempunyai penambahan biaya sebesar Rp. 177.535.777,00.
Co-Authors Adinegara, Aldo Wirastana Asik, Jhon Eko Wiyono Gautama, Gregorius Aryoko Istiatun Muhammad Idris Pakihi, Arthalia Mustakim Putera Agung Maha Agung Sidiq Wacono Wenys Kombong, Wenys