Artificial coarse aggregates is an innovation to replace natural coarse aggregate. In this study, the material used for the preparation of coarse aggregate is industrial waste, namely Expanded Polystyrene (EPS). The purpose of using this s in addition to knowing the magnitude of the compressive strength, it is also necessary to know the amount of strain that occurs when the concrete receives a load. In addition to improving the performance of compressive strength, steel fibers are also added to the concrete mixture. The method used in this research is experimental and analyzed with a mathematical model to determine the theoretical modeling of the stress-strain curve. The experimental test results show that the use of steel fibers can increase the compressive strength of normal concrete while the effect of this artificial coarse aggregates can increase the strain value by 39% of normal concrete. The results of experimental and theoretical comparisons of mixture composition which are considered to be closest to the stress-strain curve of normal concrete are concrete with a mixture of 15% artificial coarse aggregates and concrete with a mixture of 15% artificial coarse aggregates and 0,75% steel fibers.
Penelitian ini bertujuan untuk mengetahui perbandingan metode pembelajaran secara online (daring) dan klasikal di era pandemi COVID-19 pada mata kuliah Pelabuhan. Metode yang digunakan dalam penelitian ini adalah metode eksperimen dengan pola desain faktorial (Pola F). Instrumen yang digunakan adalah tes prestasi yang berisi rangkaian soal dalam bentuk ujian UTS dan UAS. Subjek penelitian yaitu mahasiswa program studi D3 Teknik Sipil sebagai kelompok kemampuan awal rendah dan program studi S1 Teknik Sipil sebagai kelompok kemampuan awal tinggi. Hasil penelitian menunjukkan bahwa nilai rata-rata prestasi belajar mata kuliah pelabuhan dengan pembelajaran menggunakan media online pada siswa jenjang kemampuan awal tinggi adalah 71,64 sedangkan mahasiswa jenjang kemampuan awal rendah adalah 74,48. Nilai thitung= 1,145 < ttabel=2,010. Mahasiswa yang memiliki jenjang kemampuan awal tinggi memiliki nilai tes prestasi belajar mata kuliah pelabuhan yang lebih rendah, hal ini tidak terpengaruh oleh jenis media yang digunakan dalam proses pembelajaran.
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