Experimental Investigation of Ultrasonic Pulse Velocity (UPV) Test Specimen in Assessing the Strength of Steel Fiber Reinforced Concrete Structure
Authors:   School of Civil Engineering, College of Engineering,  Universiti Teknologi MARA (UiTM), Shah Alam, Selangor, 40450, MALAYSIA, Zulkifli Nuralia Izzaty , Alisibramulisi Anizahyati ,   School of Civil Engineering, College of Engineering,  Universiti Teknologi MARA (UiTM), Shah Alam, Selangor, 40450, MALAYSIA,   Institute for Infrastructure Engineering and Sustainable Management (IIESM),  Universiti Teknologi MARA (UiTM), Shah Alam, Selangor, 40450, MALAYSIA, Saari Nadiah ,   School of Civil Engineering, College of Engineering,  Universiti Teknologi MARA (UiTM), Shah Alam, Selangor, 40450, MALAYSIA, Hassan Rohana ,   School of Civil Engineering, College of Engineering,  Universiti Teknologi MARA (UiTM), Shah Alam, Selangor, 40450, MALAYSIA,   Institute for Infrastructure Engineering and Sustainable Management (IIESM),  Universiti Teknologi MARA (UiTM), Shah Alam, Selangor, 40450, MALAYSIA, Shaffie Ekarizan ,   School of Civil Engineering, College of Engineering,  Universiti Teknologi MARA (UiTM), Shah Alam, Selangor, 40450, MALAYSIA,   Institute for Infrastructure Engineering and Sustainable Management (IIESM),  Universiti Teknologi MARA (UiTM), Shah Alam, Selangor, 40450, MALAYSIA, Mohamad Bhkari Norshariza ,   School of Civil Engineering, College of Engineering,  Universiti Teknologi MARA (UiTM), Shah Alam, Selangor, 40450, MALAYSIA,   Institute for Infrastructure Engineering and Sustainable Management (IIESM),  Universiti Teknologi MARA (UiTM), Shah Alam, Selangor, 40450, MALAYSIA, Muhd Sidek Muhd Norhasri ,   School of Civil Engineering, College of Engineering,  Universiti Teknologi MARA (UiTM), Shah Alam, Selangor, 40450, MALAYSIA,   Institute for Infrastructure Engineering and Sustainable Management (IIESM),  Universiti Teknologi MARA (UiTM), Shah Alam, Selangor, 40450, MALAYSIA
Published: December 2021

This study aims to conduct the Ultrasonic Pulse Velocity (UPV) test and compressive strength test of Steel Fiber Reinforced Concrete (SFRC). This paper also examines the correlation of UPV test data and compressive strength test data for SFRC specimens. The experiments were carried out with the same value of the water-cement ratio, superplasticizer but different fiber volumes of steel fiber. Twelve prism sizes 100mm x 100mm x 500mm were casted and 0.5%, 1.0%, and 1.5% of steel fiber reinforced concrete were added and the prisms undergone curing for 7, 14 and 28 days. The highest value of the UPV test at the x-axis is SFRC-0.5%, 6.26 km/s at seven days and 6.8377 km/s at 14 days. The highest value of the UPV test at the y-axis is SFR-0.5%, 6.68 km/s at seven days and 6.34 km/s at 28 days. Nevertheless, the grading is still considered excellent concrete quality based on BS1881. The highest value of compressive strength is SFRC-1.0%, 193.2 MPa at 14 days. The R-squared value for the correlation coefficient between UPV result and the compressive strength result at the x-axis and y-axis is 0.9963 and 0.9966 respectively. The non-linear models show high regression coefficient of R-squared close to 1.00, which means the parameters are strongly correlated. The correlation equation obtained can be used to predict compressive strength based on UPV data for steel fiber volume fraction up to 1.5%. Thus, it can be concluded that percentage of steel fiber added, affect the strength of the tested concrete specimens and the optimized value of steel fiber added is at 1% in this study.