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Pengaruh Durabilitas Terhadap Stabilisasi Sub Base Jalan Dengan Fly Ash Dari Pltu Asam Asam Kalimantan Selatan Arief Subakti Ariyanto
Bangun Rekaprima Vol 3, No 1 (2017): April 2017
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (590.049 KB) | DOI: 10.32497/bangunrekaprima.v3i1.760

Abstract

Penggunanan  batu bara sebagai bahan bakar PLTU menyebabkan masalah serius terhadap lingkungan. Limbah yang dihasilkan dapan berupa fly ash, bottom ash dan gipsum yang selama ini di tumpuk pada gudang limbah.  Salah satu solusi penggunaan  Fly ash adalah sebagai material stabilisasi sub base jalan di sekitar lokasi. Suatu struktur perkerasan jalan setelah dilaksankan akan mengalami perubahan musim pengujan dan kemarau. Pada musimpenghujan lapis sub base akan mengalami  genangan air merupakan masalah yang harus diatasi. Penelitian ini dimaksudkan untuk mendapatkan manfaat penggunaan limbah fly ash untuk sub base jalan dan  pengaruh durabilitas akibat perubahan musim. Perubahan musim tersebut dapat dimodelkan dengan uji durabilitas dengan 12 siklus basah kering . Berdasarkan pengujian,sub base termasuk tanah   A-2 -7  sesuai USCS,dengan nilai  CBR  51% pada densitas maksimum melibihi yang dipersyaratkan yaitu sebagai sub base yaitu CBR 35 % dan nilai qu dari UCS test 22,702 kg/cm² pass the minimal requirement 22 kg/cm². Uji durabilitas menunjuk sample memberikan hasil prosentase kehilangan akibat siklus sebesar  6,43 %  kurang dari  10% for A-2-7 soil type.Kata kunci :Fly ash, Sub base, Durability
PENGUATAN KOMPETENSI PENGUJIAN MUTU BETON MELALUI PELATIHAN REBOUND HAMMER TEST BAGI SISWA SMK: PENGUATAN KOMPETENSI PENGUJIAN MUTU BETON MELALUI PELATIHAN REBOUND HAMMER TEST BAGI SISWA SMK Nor Puji Lestari; Rio Devilito; Fikri Praharseno; Lalu Yahya Surya Buana; Suparman; Sriwahyuningsih Sulaiman; Suwarto; Wahjoedi; Arief Subakti Ariyanto; Parhadi
Bangun Rekaprima Vol. 12 No. 1 (2026): April 2026
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v12i1.7946

Abstract

Competence in concrete quality testing is an essential skill for vocational high school graduates in the construction sector to meet the demands of the construction industry. However, limited laboratory facilities and practical experience often hinder students from mastering non-destructive testing methods, particularly the Rebound Hammer Test. This community service program aimed to improve the knowledge and practical skills of students from the Building Construction and Housing Engineering Program at SMK Negeri Pringsurat in conducting concrete quality assessment using the Rebound Hammer Test. The program was implemented through a sequence of activities, including needs assessment, classroom instruction, equipment demonstration, guided hands-on practice, and evaluation using pre-tests, post-tests, practical observations, and participant response questionnaires. The results demonstrated a significant improvement in students' understanding of concrete quality testing principles, testing procedures, and interpretation of test results, as reflected in higher post-training evaluation scores. Furthermore, participants were able to operate the testing equipment according to standard procedures and expressed highly positive responses toward the practice-based learning approach. The program also strengthened teachers' instructional capacity through the provision of a training module that can be integrated into future laboratory learning activities. Although the program was limited by training duration and the availability of testing equipment, the integrated approach combining theoretical instruction, demonstrations, and guided practice proved effective in enhancing participants' competencies. This training model has the potential to be replicated in other vocational schools to support the development of industry-oriented competencies in the construction sector.