Improving Tensile Strength and Strength and Resilience of Reinforced Concrete through Pozzolanic Materials

Abstract

So far, there have been many definitions of concrete. According to these definitions, concrete consists of three main materials. These materials include cement materials, water with which cement materials react and become sticky; and fillers that make up a significant volume of concrete. Steel reinforcements reinforce concrete under tension, but they have almost no effect on the Turkish development process. In other words, when the end of the crack reaches the position of the tensile reinforcements, the rate of crack opening increases and also the crack propagation decreases, and then when the crack passes through the reinforcement, the crack development increases at a higher rate. In addition, the presence of reinforcement in certain tensile areas makes the concrete out of homogeneity and homogeneity, and the assumption of concrete homogeneity in analysis methods faces problems. The various advantages of using fibers in concrete, such as increasing bending strength, increasing shear strength, increasing tensile strength, increasing resistance to impact loads, increasing the amount of energy absorption, and increasing cross-sectional resistance against cracking, have caused the use of fibers in strengthening and repairing all kinds of structures. Concrete should be used. The results of the compressive strength test in samples reinforced with 1.5% and 2.5% glass fibers are as follows: The use of glass fibers in this research has reduced the effectiveness of concrete. According to these results, if glass fibers are used, the compressive strength of the samples is greatly reduced. The use of pozzolanic materials has significantly increased the compressive strength of concrete reinforced with glass fibers. Based on this, the highest compressive strength of 7 days and 28 days is related to samples reinforced with 2.5% glass fibers and containing metakaolin. In the samples reinforced with 2.5% glass fibers, with the increase in the amount of metakaolin used from 10% to 15%, the 28-day strength of the samples increased from 53.665 MPa to 56.16 MPa.