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Penelitian ini membahas hubungan cepat rambat gelombang ultrasonik dengan kuat tekan dan pola retak beton daur ulang. Pengujian cepat rambat gelombang ultrasonik (UPV) dilakukan menggunakan PUNDIT. Pengamatan pola retak menggunakan metode digital image correlation (DIC). Benda uji yang dibuat adalah 16 kubus ukuran 15 cm dan 4 balok ukuran 15x15x50 cm. Spesimen kubus diuji tekan di umur 3, 7, 14, dan 28 hari dan di umur 28 disertai metode DIC. Pengujian metode DIC menggunakan kamera Fuji Film XA-3 dan diolah dengan software Ncorr pada MATLAB. Benda uji balok diuji UPV setiap jamnya di 24 jam pertama dan setiap hari sampai umur 28 hari. Penelitian ini menghasilkan hubungan logaritmik antara nilai UPV dan umur beton daur ulang dengan persamaan tiap benda uji sebagai berikut, VA = 2.68745E+02ln(x)+1.92197E+03, R2=0.809, VB = 2.75780E+02ln(x) + 1.82082E+03, VC = 3.51058E+02ln(x) + 1.59413E+03, dan VD = 3.51448E+02ln(x) + 1.61130E+03 dengan nilai R2 sebagai berikut, RA 2 =0.809, RB 2=0.844, RC 2=0.762, dan RD 2=0.772. Dihasilkan hubungan eksponensial antara kuat tekan beton dan nilai UPV dengan persamaan fc = 1.58593E01e1.22057E+00V[m/s] dengan nilai R2=7.36785E-01. Hasil pengujian metode DIC menunjukkan evolusi deformasi vertikal dan horizontal serta evolusi pola retak dari beton daur ulang. Stiffness tiap benda uji sebesar B = 862.92 kN/mm, C = 902.21 kN/mm, dan D = 1018.22 kN/mm. Poisson ratio dari benda uji sebesar B = 0.2478, C = 0.2302, dan D = 0.2392.

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This research will conduct a discussion about relationship between ultrasonic pulse velocity and compressive strength along with crack pattern of recycled concrete. Ultrasonic pulse velocity (UPV) will be measured using the PUNDIT. Observation of crack patterns using digital image correlation (DIC) method of recycled concrete. The specimens to be made are 16 cubes with dimension of 15cm and 4 beam with dimension of 15x15x50 cm. Cube specimens aged 3, 7, 14, and 28 days will be tested and on the day 28 will use DIC method. DIC method use Fuji Film XA-3 as to capture pictures which will be processed with Ncorr on MATLAB. Beam specimens will be used for UPV test within every hour in the first 24 hours and every day up to 28 days. This study results show logarithmic relationship between the UPV and the age of recycled concrete with the result equation each specimen as follows, VA = 2.68745E + 02ln (x) + 1.92197E + 03, VB = 2.75780E + 02ln (x ) + 1.82082E + 03, VC = 3.51058E + 02ln (x) + 1.59413E + 03, and VD = 3.51448E + 02ln (x) + 1.61130E + 03 with the coefficient of determination of each specimen as follows, RA2 = 0.809, RB2 = 0.844, RC2 = 0.762, and RD2 = 0.772. Exponential relationships shown between concrete compressive strength and UPV in equation of fc = 1.58593E01e1.22057E + 00V [m / s] with R2 = 7.36785E-01. The DIC test results show the evolution of vertical and horizontal deformations as well as the evolution of crack patterns of recycled concrete. Stiffness of each specimens as follows, B = 862.92 kN / mm, C = 902.21 kN / mm, and D = 1018.22 kN / mm. Poisson ratio of each specimens as follows B = 0.2478, C = 0.2302, and D = 0.2392.

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"BIM (Building Information Modeling) adalah simulasi model 3D yang menghubungkan informasi perencanaan, desain, konstruksi, dan operasional sehingga dapat meningkatkan efektivitas dan efisiensi konstruksi. Namun, adopsi BIM di Indonesia relatif lambat. Maka dari itu, dilakukan identifikasi kondisi implementasi BIM untuk mengetahui arah penggunaan dan perkembangannya. Penerapan BIM yang optimal didasari implementasi dua faktor utama, yaitu kedewasaan pemanfaatan fungsi BIM dan implementasi fasilitas pendukung. Berdasarkan hasil penelitian, BIM mayoritas dimanfaatkan pada fase proyek: Konstruksi, Desain, dan Perencanaan dengan menggunakan aplikasi: REVIT, Navisworks, dan BIM 360. Kedewasaan pemanfaatan fungsi BIM yang dominan dirasakan adalah: Collaboration Team Building, Communication, dan Clash Detection. Faktor utama penghambat Implementasi BIM adalah Aturan (Persiapan, Regulasi, dan Kontrak). Perlu disusun regulasi terkait aplikasi yang sering digunakan oleh pelaksana konstruksi. Dalam proses penyusunan rencana kerja, BIM berperan dalam memberikan gambaran visual kondisi dari lapangan, biaya (Cost Control), dan waktu yang digunakan dalam proses rencana kerja tersebut. Keselarasan antara rencana kerja dengan aktualisasi atau realisasi di lapangan diperlukan karena menentukan biaya yang dibutuhkan dalam kurun waktu rencana kerja tersebut. Dalam penelitian ini, akan ditampilkan perbandingan antara 2 jenis rencana kerja yaitu Rencana Kerja tanpa menggunakan BIM dan dengan menggunakan BIM. Kedua rencana kerja tersebut akan dibandingkan dengan realisasinya di lapangan dan dibandingkan jumlah pekerjaan yang sesuai antara Rencana Kerja dengan Realisasi Lapangan.

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BIM (Building Information Modeling) is a 3D model simulation that connects planning, design, construction, and operational information so as to increase construction effectiveness and efficiency. However, BIM adoption in Indonesia is relatively slow. Therefore, identification of BIM implementation conditions is carried out to determine the direction of use and development. The optimal implementation of BIM is based on the implementation of two main factors, namely the maturity of BIM function utilization and the implementation of supporting facilities. Based on the results of the study, the majority of BIM is utilized in the project phase: Construction, Design, and Planning using applications: REVIT, Navisworks, and BIM 360. The maturity of BIM function utilization that is predominantly felt is: Collaboration Team Building, Communication, and Clash Detection. The main inhibiting factors of BIM Implementation are Rules (Preparation, Regulation, and Contract). It is necessary to formulate regulations related to applications that are often used by construction implementers. In the process of preparing a work plan, BIM plays a role in providing a visual picture of the condition of the field, costs (Cost Control), and time used in the work plan process. Alignment between the work plan and actualization or realization in the field is needed because it determines the costs needed within the period of the work plan. In this study, a comparison will be shown between 2 types of work plans, namely Work Plans without using BIM and using BIM. The two work plans will be compared with their realization in the field and compared the amount of work that matches the Work Plan with Field Realization."