Influence of higher binder content on the splitting tensile strength and modulus of elasticity of self-compacting concrete: An experimental investigation and proposed prediction equation

Self-compacting concrete (SCC) is known for its unique properties, but its dynamic nature can lead to instability. To address this issue, two types of SCC have been developed: viscosity-modifying agent (VMA) and powder type SCC. In this study, the influence of the amount of binder material on the properties of powder type SCC, particularly splitting tensile strength (STS) and modulus of elasticity (MOE), was investigated. 3 mixes of SCC with binder in kg per m3 of 550 (Mix550), 600 (Mix600) and 650 (Mix650) were designed and tested for workability, segregation resistance, compressive strength, MOE, and STS. To estimate the STS of the SCC, ACI 363R-92 (1992), CEB-FIB (1991), and IS 456-2000 codes were used, while IS 456-2000, ACI 363R-92, and BS EN 1992-1-1-2004 codes were used for the MOE. The experimental values of STS at 28 days are obtained for the three mixes(Mix550,Mix600 and Mix650) are 6.45 N/mm2, 6.89 N/mm2, 7.19 N/mm2 and estimated values of STS at 28 days for ACI 363R-92 (1992) are 4.43 N/mm2, 4.65 N/mm2, 4.73 N/mm2 for CEB-FIB (1991) are 4.29 N/mm2, 4.58 N/mm2, 4.68 N/mm2 for IS 456-2000 are 5.25 N/mm2, 5.52 N/mm2, 5.61 N/mm2. A new equation has been suggested for predicting STS based on the experimental findings.