

Research on the Influence of Pores and Micro-cracks on the Macro-mechanical Properties of Concrete
Abstract
Concrete is typical porous medium permeated by an interconnected network of pores and micro-cracks. In the micro level, concrete is considered as a three-phase composite with aggregates, pores and mortar matrix. In the paper, the random multi-scale mechanical analysis model is adopted to study the macro-mechanical properties of concrete with pores. The results indicate that the existence of pores and micro cracks has great influence on macro elastic modulus, effective strength, residual strength and other mechanical properties of concrete, which should not be neglected when investigating the mechanical properties and damage fracture of concrete.
Keywords
concrete; pores; micro cracks; mechanical propertiesText