Unified calculation method of uniaxial mechanical properties of lightweight aggregate concrete

Based on the fact that researchers at home adopt divisional method to describe the mechanical indexes of normal lightweight aggregate concrete and high-strength lightweight aggregate concrete, which leads to calculated result error for different calculation formulas at divisional borderline, even cannot be applied to analyses and design of the lightweight aggregate concrete structures, through analyzing test results of mechanical properties of lightweight aggregate concrete under uniaxial loading in China, the continuities of mechanical indexes and stress-strain curves of lightweight aggregate concrete whose strength grade ranges from LC10 to LC80 were found. Based on the method of statistical analysis, numbers of test results of uniaxial mechanical properties of lightweight aggregate concrete with different strength grades were analyzed. The unified calculation formulas which can be applied in various strengths of lightweight aggregate concrete for size coefficient, axial compressive strength, axial tensile strength, split tensile strength, elastic modulus, strains at peak uniaxial compression and tension, stress-strain curves of axial compression and tensile of lightweight aggregate concrete were proposed. Calculated results are in agreement with the experimental results.