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All Journal Bearing : Jurnal Penelitian dan Kajian Teknik Sipil
Martini, RA Sri
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Civil Engineering, Building, Construction & Architecture Engineering Transportation

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ANALISIS BIAYA DAN WAKTU BERDASARKAN ANALISA PRODUKSIVITAS ALAT BERAT PEKERJAAN TANAH GALIAN (PEMBUATAN PIT) PADA PROYEK INSTALASI PENGOLAHAN AIR LIMBAH Martini, RA Sri; Kimi, Sudirman; Mulya, Sukma
Bearing : Jurnal Penelitian dan Kajian Teknik Sipil Vol 6, No 4 (2020): Bearing : Jurnal Penelitian dan Kajian Teknik Sipil
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jbearing.3222202064

Abstract

Technological advances provide opportunities for construction workers to use heavy equipment as a substitute for manual equipment. Heavy equipment can be a solution to increase the efficiency and effectiveness of work implementation, which can be seen in the cost calculation or unit price.It can be seen that alternative 3 uses 2 units of Kobelco PC-200 excavators, 4 units of 5 m3 dump trucks, these alternatives have the smallest time difference to the original conditions in the field. Therefore, it is very time efficient and fast to process and costs slightly increases and results in fast and efficient workmanship. It can be seen for the difference in costs of - 28,905,973 (- 26%) and the difference in total working time of -25 hours (- 40%). Referring to the description of the calculation of the comparison between the original conditions in the field with alternative calculations, if a minus (-) result is obtained then the work is faster. So it can be recommended to use alternative 3 to carry out soil removal work in the Wastewater Treatment Plant project. Palembang, South Sumatra.
PENGARUH PENAMBAHANAN METAKAOLIN DAN SUPERPLASTICIZER TERHADAP KUAT TEKAN BETON PADA MUTU K-400 A Rivai, Masri; Martini, RA Sri; Dimas, Erdin
Bearing : Jurnal Penelitian dan Kajian Teknik Sipil Vol 7, No 1 (2021): Bearing : Jurnal Penelitian dan Kajian Teknik Sipil
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jbearing.3656202171

Abstract

High-quality concrete usually uses an addition to workaholic, high-pressure, and concrete durability such as metacaolin and superplasticizer.The Study was conducted to find out how the metacaolin + superplasticizer addition to the strong K-400 press of concrete. The test object used was a cube 15 x 15 x 15 cm. Strong tests of concrete were made at the age of 3 days, 14 days, and 28 days. The research is done on normal concrete, and metacaolin 10% + superplasticizer 0,5%, 1%, 1,5%, 2%, 2,5%, 3%, and 3,5% with separate parts.Research shows the strong value of normal concrete pressure at 28 days on 403,66 Kg/cm² while strong value of optimum concrete at 28 days occurs in a variety of Metacaolin 10% + Superplastizer 3% on 460,58 Kg/cm². It is known that adding metacaolin + superplasticizer add to strong concrete pressure.Key Words : concrete, metacaolin, superplasticizer, and strong press.
Co-Authors A Rivai, Masri Dimas, Erdin Kimi, Sudirman Mulya, Sukma