Figure 5 Correlation between total cracked area and split tensile strength
Correlation analysis showed that there is a strong inverse relationship between total plastic shrinkage cracking area and split tensile capacity of concrete. Both M20 and M30 series with PVA fiber has correlation coefficients of -0.946 and -0.974 respectively. Steel fiber specimens for M20 and M30 series had values of -0.657 and -0.776. Figure 5 shows that specimens with high tensile strength had lower cracked area. Although there is a correlation between the strength and total cracked area for different fiber volumes, this does not imply for all fiber types. Further studies using different fiber types need to done before any definitive conclusion is made.