Effect of RSSA of Aggregates on the Elastic Module of Concrete
In order to quickly select and determine the concrete aggregate material source of the project,the physical characteristics of different lithology aggregates are studied based on the fractal theory,and the relative specific surface area(RSSA)parameter of aggre-gates is proposed to quickly characterize the processibility of different aggregates,and the relationship between the relative specific surface area of aggregates(RSSA)and the elastic modulus of concrete is established.The results show that the RSSA of aggregates is closely re-lated to the solid mineral composition and mineral particle size in the parent rock.And the particle content of the solid mineral component is positively correlated with the RSSA of the crushed aggregate.The RSSA of the aggregate is negatively correlated with the fineness mod-ulus and apparent density of the aggregate,and positively correlated with the rock powder content and the crushing index.Under the same strength grade,the water-binder ratio and the elastic modulus of the concrete are linearly decreasing with the RSSA of the aggregate.
fractal theoryaggregaterelative specific surface areaconcretestatic compressive elastic modulus
万方数据
维普
