Tensile Strength and Absorption Analysis of Hybrid High Quality Concrete Using Cement Replacement Additives Substitution, Aggregate Substitution and Nanomaterial Iron Ore

Abstract

High quality concrete is defined as concrete which has a required compressive strength greater than 41.4 MPa. One disadvantage of high quality concrete is the high cost of production. Therefore alternative economical materials such as coal fly ash, palm shells, and pozzolan sand are used as alternative replacement materials. This study aims to determine the value of split tensile strength, flexural tensile strength, and absorption by using alternative substitute materials as substitute additives, fine aggregates, and coarse aggregates and the addition of nanomaterial iron ore fillers with seven different types of variations. The specimens for testing the split tensile strength in the form of cylinders measuring 30 cm high and 15 cm in diameter were 42 pieces, the specimens for testing flexural tensile strength in the form of beams measuring 15 cm × 15 cm × 60 cm were 42 pieces, and the specimens for absorption testing were in the form of 42 cubes in size of 5 cm × 5 cm × 5 cm. The tests were carried out at 28 days and 56 days. The results showed that high quality concrete using variations of BMT-APPP with the result of flexural tensile strength at 28 days is 5.19 MPa and at the age of 56 days with a value of 5.58 MPa. Maximum tensile flexural strength results obtained in high quality concrete using BMT-APPP variations, namely the results of split tensile strength at 28 days 5.73 MPa and at the age of 56 days with a value of 6.11 Mpa. Absorption of normal high quality concrete at 56 days is 4.63%, greater than hybrid high quality concrete with various variations. From the test results it can be concluded that BMT-APPP is the best variation of this study.