Kohesi: Jurnal Sains dan Teknologi

Articles

Vol. 11 No. 4 (2026): Kohesi: Jurnal Sains dan Teknologi, ISSN 3025-1311

PENGARUH KADAR SILICA FUME TERHADAP KUAT TEKAN PASTA SEMEN UHSCP DENGAN DAN TANPA SINTERING

Submitted
September 5, 2026
Published
2026-09-05

Abstract

Perkembangan infrastruktur modern mendorong pemanfaatan Ultra-High Strength Cement Paste (UHSCP) sebagai material berkekuatan tinggi dengan dimensi yang lebih efisien. Silica fume (SF) berperan meningkatkan kuat tekan melalui efek pengisian mikrostruktur dan reaksi pozzolanik yang menghasilkan gel C-S-H tambahan. Penelitian ini mengkaji pengaruh variasi kadar SF terhadap kuat tekan UHSCP pada empat metode perawatan yang mengombinasikan sintering dan curing. Campuran dibuat menggunakan Semen Portland Komposi t, silica fume, dan superplasticizer dengan rasio air-pengikat rendah yang konstan. Kuat tekan dievaluasi pada beberapa umur pengujian untuk menilai perkembangan sifat mekanis. Hasil menunjukkan bahwa kadar SF optimum dipengaruhi oleh metode perawatan, dengan curing menghasilkan perkembangan mikrostruktur dan kuat tekan yang lebih stabil. Sebaliknya, sintering mempercepat hidrasi awal tetapi berpotensi menurunkan kinerja jangka panjang akibat terbentuknya cacat mikrostruktural permanen.

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