Korelasi Nilai Kuat Tekan Beton dengan Metode Ultrasonic Pulse Velocity (UPV) dan Compression Test pada Self Compacting Concrete Berbahan Dasar Abu Ampas Tebu

Abstract

With the increasing demand for strong and sustainable infrastructure, innovation in concrete technology has become very important. Self-Compacting Concrete (SCC) emerges as a modern solution that can compact itself without vibration, thereby enhancing construction efficiency and concrete quality. In an effort to support environmental sustainability, sugarcane bagasse ash (AAT), as an agro-industrial waste rich in silica content, has begun to be utilized as a substitute material for cement in SCC concrete. The variations of AAT used were 0%, 5%, 10%, 15%, 20%, and 25% of cement weight. The tests conducted include fresh concrete testing (Slump-flow, T50cm Slump-flow, V- funnel, J-Ring, and L-Box) and compressive strength testing using a compression machine and ultrasonic pulse velocity with a cylinder test of d=15 cm t=30 cm. From this research, it was found that the slump flow and l-shape box values decreased as the substitution variation of AAT increased. The v-funnel index increases along with the addition of AAT substitution variations. The compressive strength values of hardened concrete at 28 days using a compression machine with variations of 0%, 5%, 10%, 15%, 20%, and 25% are 48.293 MPa, 46.029 MPa, 39.615 MPa, 30.938 MPa, 24.524 MPa, and 18.351 MPa, respectively. The compressive strength values of hardened concrete at 28 days using ultrasonic pulse velocity for variations of 0%, 5%, 10%, 15%, 20%, and 25% are 51 MPa, 55 MPa, 48 MPa, 38 MPa, 33 MPa, and 28 MPa, respectively. From both tests, an R^2 value of 0.9004 and 0.98 was obtained. Therefore, when comparing the correlation values using the calculation formula (MAPE), a percentage error of 4.74% is achieved.