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

作者：Zhou Yong^*; Gao Jie; Sun Zhihui; Qu Wenjun

来源：Construction and Building Materials, 2015, 98: 137-145.

DOI：10.1016/j.conbuildmat.2015.08.110

• Early age
• Impact resonance test
• Influential factors
• Multiple regression analysis

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 (f(c)), static modulus of elasticity (E-c) and dynamic modulus of elasticity (E-d) 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 E-c-E-d relationship is also proposed. It is found that the relationship between E-c and E-d 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 E-c-E-d relationship.

• 出版日期2015-11-15
• 单位同济大学