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Maulidin, Alpin
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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Pengaruh Modifikasi Tulangan Bambu dengan Paku Sekrup terhadap Daya Lekat Bambu-Beton Maulidin, Alpin; Farhandasi, Reza
SAINSTEK Vol. 13 No. 1 (2025)
Publisher : Sekolah Tinggi Teknologi Pekanbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35583/js.v13i1.305

Abstract

Penggunaan bambu sebagai material alternatif tulangan dalam beton telah menarik perhatian sebagai solusi ramah lingkungan dan berbiaya rendah. Namun dalam penggunaannya, daya lekat antara bambu dan beton sering kali menjadi kendala utama karena sifat permukaan bambu yang licin dan bambu yang memiliki sifat swelling yang relatif tinggi. Penelitian ini bertujuan untuk mengevaluasi pengaruh penggunaan paku sekrup sebagai modifikasi pada tulangan bambu dalam meningkatkan daya lekat antara bambu dan beton. Penelitian dilakukan secara eksperimental dengan menggunakan benda uji berupa beton silinder berukuran tinggi 300 mm dan diameter 150 mm mengacu pada ASTM C234-91a. Variasi perlakuan pada tulangan bambu meliputi tanpa modifikasi (POT-0), modifikasi dengan paku sekrup setinggi 1 cm (POT-1), dan modifikasi dengan paku sekrup setinggi 2 cm (POT-2). Sebanyak enam benda uji disiapkan untuk pengujian tarik lekat. Hasil penelitian menunjukkan bahwa tegangan lekat rata-rata pada benda uji POT-0, POT-1, dan POT-2 masing-masing sebesar 0,813 MPa, 1,110 MPa, dan 1,243 MPa.
Optimalisasi Ukuran Maksimum Agregat terhadap Workability dan Kuat Tekan Beton Mutu Tinggi dengan Tambahan Superplasticizer Farhandasi, Reza; Maulidin, Alpin; Khairunnisa, Hanyta; Rahmadhani, Yuni
Jurnal Teknologi Vol 26, No 1 (2026): April 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i1.8819

Abstract

The demand for High-Strength Concrete (HSC) in modern infrastructure necessitates the optimization of its constituent materials. This study investigates the effect of varying Maximum Aggregate Size (MAS) on the compressive strength of HSC, which was designed with a low water-cement ratio (0.4) and a target characteristic strength (f’c) of 40 MPa at 28 days, utilizing a superplasticizer to maintain workability. Three variations of coarse aggregate size were tested: 19.10 mm, 25.56 mm, and 31.50 mm. Twenty cube specimens (15×15×15 cm) were prepared and tested. The results showed a clear inverse correlation between MAS and compressive strength. The 19.10 mm aggregate produced the highest average strength of 30.269 MPa, followed by 29.110 MPa (25.56 mm) and 27.322 MPa (31.50 mm). This optimal performance is attributed to the superior gradation (lowest Fineness Modulus) and the resulting enhancement of the Interfacial Transition Zone (ITZ) quality, as smaller aggregates promote a denser and stronger bond with the cement paste. Although the target strength of 40 MPa was not achieved, the 19.10 mm aggregate demonstrated the highest potential for strength development, showing a 10.79% increase compared to the 31.50 mm aggregate. The study concludes that MAS 19.10 mm is the most optimal size among the variations tested for maximizing compressive strength under the given mix design.
Co-Authors Farhandasi, Reza Harizi, Ahmad Abrar Khairunnisa, Hanyta Rahmadhani, Yuni