Research On Mix Proportion Design Of Hing Proformance Concrete Based On Granite Aggregate

Currently, fractal geometry is the representative science to study the non-integer dimension and irregular geometric characteristics all of the world. It can count selfsimilarity, semi-self-similarity and statistical self-similar structure by multiple iterations method which is defined by mathematical. At present, this science had broad application in physics, medicine, mathematics, astronomy and mechanics area and obtained abounded research results. However, there are very few applications in civil engineering area except the analysis of crack propagation application. The research on the accumulation of material, detail structure, aggregate gradation, shape classification and other raw materials, especially when it comes to for coarse and fine aggregate shape classification and impact on the performance of concrete are very rare. The study is on its infancy. Concerned about this, the author takes granite in high-performance concrete for the subject and relies on north highway construction project. This paper mainly analyzes the granite fractal geometry to determine the fractal dimension of stone, and compare different influences of different points of high dimension stone of properties on concrete workability, strength, durability and a series of properties.Firstly, the paper analyzed the basic performance of granite crushing coarse aggregate which derived from different methods, and calculated aggregate dimensions calculation formula according to aggregate angularity and spheroid fractal geometry iterative interpolation function.Secondly, there are three test groups combined different aggregate gradation rates to test slump, expansion degree, cube compressive strength, alkali- bone reaction, frost resistance, chlorine ion diffusion test performance and other technical indicators of C50 high performance concrete made by granite aggregate. These tests have measured the effects caused from the fractal dimension aggregate gradation and gradation.Finally, the paper will use MATLAB software to match the formula between fractal dimension aggregate gradations and aggregate gradation ratio between HPC strength and durability of the indexes. Then the author will use the whole calculation formula to optimize C50 HPC mix proportion design of concrete and propose a new method to determine the full computational design according to the fractal dimension of the coarse aggregate and draw a comparison and verification between the concrete practical performances.This paper presents a new mix proportion design is carried out based on the aggregate. To some projects that can not be satisfied with stone sources, the new method will play a better role in guidance and prediction of concrete performance. It will have a high the practical value in the application.