A fundamental study on compressive strength, static and dynamic elastic moduli of young concrete

• Relationship between static and dynamic moduli of elasticity is linear.
• Aggregate volume content, water-to-cement ratio and curing temperature affect E.
• Aggregate volume content and maximum size are dominant factors on Ec–Ed.

This study investigates the influence of volume content of aggregates, maximum size and type of coarse aggregates, water-to-cement ratio and curing temperature on mechanical properties, i.e. prismatic compressive strength (fc), static modulus of elasticity (Ec) and dynamic modulus of elasticity (Ed) of concrete at early age. A new equation is proposed to correlate prismatic compressive strength and elastic moduli of concrete. Based on the experimental data and the analysis results, the Ec–Ed relationship is also proposed. It is found that the relationship between Ec and Ed is linear, and the coefficients of linear relationship are analyzed by multiple regression analysis, considering aggregate content, maximum size of the coarse aggregate, water-to-cement ratio and curing temperature. It is found that the volume content of aggregates is the most significant factor that influences the Ec–Ed relationship.