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All Journal INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY Jurnal Profesi Insinyur Indonesia
Sekarningtyas, Nazifa
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Environmental Science Transportation

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Evaluasi Waktu Pekerjaan Bored Pile dengan Lean Construction Metode Last Planner System pada Proyek RSWS Makassar Sekarningtyas, Nazifa; Priastiwi, Yulita Arni; Widayat, Widayat
Jurnal Profesi Insinyur Indonesia Vol 2, No 3 (2024): JPII
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpii.2024.22768

Abstract

Permasalahan yang umum pada pelaksanaan proyek konstruksi di antaranya keterlambatan waktu, peningkatan biaya, dan adanya penyimpangan pekerjaan. Keterlambatan waktu menyebabkan efek domino terhadap pelaksanaan pekerjaan lain dan biaya yang membengkak. Penelitian ini bertujuan untuk mengevaluasi penerapan lean construction dan mengevaluasi waktu pelaksanaan pekerjaan pada saat pelaksanaan pekerjaan bored pile. Penelitian ini dilakukan pada Proyek RSWS yang berlokasi di Makassar, Sulawesi Selatan. Aktivitas awal yang dilakukan adalah pekerjaan pondasi bored pile. Pelaksanaan pekerjaan bored pile khususnya pada tahap pengeboran tanah dan pengecoran bored pile sangat dipengaruhi oleh kondisi cuaca. Apabila pekerjaan pondasi bored pile mengalami keterlambatan, hal ini akan berpengaruh terhadap pekerjaan-pekerjaan selanjutnya. Evaluasi dan pengendalian terhadap waktu pelaksanaan proyek dievaluasi dengan penerapan lean construction atau konstruksi ramping menggunakan metode last planner system. Hasil penelitian didapatkan hasil Percent Plan Complete (PPC) rata-rata sebesar 66,48%. Penyebab keterlambatan waktu yang perlu dijadikan perhatian pada pekerjaan bored pile yang dilaksanakan pada musim hujan adalah cuaca dan alat. Kata kunci: bored pile, lean construction, last planner system, percent plan complete, proyek rumah sakit
INVESTIGATION OF MECHANICAL CHARACTERISTICS OF LIGHTWEIGHT CONCRETE USING ENVIRONMENTALLY FRIENDLY LIGHTWEIGHT AGGREGATES Nelfia, Lisa Oksri; Sekarningtyas, Nazifa; Sumarno, Agung; Rinanti, Astri; Amiri, Ouali
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 7, NUMBER 2, OCTOBER 2024
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v7i2.19715

Abstract

This study aims to investigate the mechanical properties of lightweight concrete using lightweight aggregate and analyze the impact of silica fume on enhancing its compressive strength. The main objective of this study was to improve the value of industrial waste by utilizing GGBFS as a substitute for cement. Four alternative compositions have been used to produce samples of lightweight concrete. The coarse aggregate is substituted with 100% lightweight expanded clay aggregate, whereas the fine aggregates are replaced with 100% vermiculite and 100% polystyrene bead waste.                                A combination of 20% GGBFS and 10% silica fume is employed for cement replacement. The materials used throughout this study consist of aluminum powder and superplasticizer. The workability, compressive strength, tensile strength, and specific gravity of concrete will be determined by testing.                  The waster curing will be carried out on cylindrical concrete specimens 200 mm in height and 100 mm in diameter. Experimental results showed that the concrete mixture consisting of 80% cement and 20% GGBFS as binders, along with lightweight expanded clay aggregate as coarse aggregate and vermiculite as the fine aggregate, exhibits the highest compressive strength compared to other lightweight concrete mixtures.
Co-Authors . Widayat Amiri, Ouali Astri Rinanti Nelfia, Lisa Oksri Sumarno, Agung Yulita Arni Priastiwi