This study discusses the factors influencing BIM 4D and M-PERT implementation on highrise residential building structures using RII (Important Relative Index) analysis. The research was conducted using a quantitative descriptive method by distributing questionnaires to practitioners related to the work of high-rise residential structures. The study found that ten factors had the most influence on implementing BIM 4D and M-PERT on high-rise residential structures, namely other detailed drawings, project schedule, percentage of delays. , activity modeling, project activity integration, network similarity, building design planning, scheduling integration, visualization, increase productivityKata kunci: M-PERT, BIM 4D, Penjadwalan, Proyek konstruksi Penelitian ini membahas mengenai faktor -faktor yang berpengaruh dalam mengimplementasikan BIM 4D dan M-PERT pada pekerjaan struktur bangunan hunian tingkat tinggi dengan menggunakan Analisa RII (Relative Important Index).Penelitian dilakukan dengan metode deskriptif kuantitatif dengan menyebar kuisoner ke praktisi yang berkaitan dengan pekerjaan struktur hunian bertingkat tinggi, hasil penelitian didapatkan bahwa ada 10 faktor paling berpengaruh terhadap implementasi BIM 4D dan M-PERT pada pekerjaan struktur hunian bertingkat tinggi, yaitu antara lain detail gambar, schedule proyek, presentase keterlambatan, pemodelan aktivitas, penggabungan kegiatan proyek, kemiripan jaringan, perencanaan desain bangunan, integrasi penjadwalan, visualisasi, dan meningkatkan produktivitas
The micro voids in the cement paste of cementitious material drastically reduce the load-carrying capacity of the element, due to the reduction in area. On the other hand, the weak interface between aggregates and mortar induces micro-crack initiation and promote crack propagation. It therefore becomes imperative to reduce the voids in the mortar, and promote a better hydration degree of cement. A method that has been proven to be effective is the use of nano-cement particles. The smaller cement particles will result in a better hydration process, and create smaller ettringites and calcium hydrates. This research work studied the effect of nano-cement percentage in the mortar mix by the substitution method. The ratio in weight of the nano-cement with respect to the normal cement ranged from 0%, 20%, 40%, 60%, 80%, to 100%. The specimens sized 50 × 50 × 50 mm were tested at the age of 28 days to obtain their compression strength. The cement-to-sand proportion was 1 to 2.75, while a water-cement-ratio of 0.485 was maintained throughout the experiments. Two cement types, PCC (Portland Composite Cement) and PPC (Portland Pozzolane Cement), all Indonesian based products, were compared to obtain a picture of the overall cement condition in Indonesia, and the effectiveness of the nano-cement use to each of the types.
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