The Theoretical Research Of The Pore Structure And Strength Of Concrete

The strength is a main mechanics performance index of the concrete.It Has always been a focus of material scientific research of concrete.Models about mechanics characteristic of concrete were mostly the understanding based on material macroscopical level of concrete in the past.Its main characteristic turns the material ideal with heterogeneous,nonuniform nature into the even, continuous body and carry on modeling. This kind simplified and met project practice's demands to a certain extent,but it is difficult to study the influence produced toward strength of material of structure of the microcosmic or the mescoscopic within the concrete material with this kind of method. The important meaning in which this direction studied has lain in establishing the connection between the material science of concrete and civil engineering, Analyse the strength in terms of material microcosmic or the mesoscopic, have important meaning to understanding, know the essential law of the strength of concrete.This text divides six chapters altogether .Chapter one reviewed the pore structure in nowadays domestic and international research current situation,including the concrete examines research,research of the pore structure model and the research current situations of pore structure and strength relation of the pore method,have introduced some most important achievements of structure research of pore;Chapter two narrated much yardstick of the material mesoscopic structure of concrete and principle of examining pore technology of material of concrete,and the commonly used sign parameter in discussedding the pore and material pore of Quito of cement and analyse,have explained that the influence factor of MIP to the result of study of pore,has pointed out the limitation in MIP in the pore structure;Analyse porosity and strength relation development course of model emphatically,and has carried on comparative analysis to the existing model, has pointed out the weak point of the original model; On the basis of "ing integrate synthetically ",propose concrete pore structure compound body model and pore physical model of systemlex body; Chapter five carried on the corresponding test data to compares to the model parameter appearing in model of chapter four with and analyses,have received K value of the characteristic of strength of matrices of reflecting according to the method to return to analysis,and calculate the influence produced on the strength of concrete in revision that can probed into the content of cement,elastic mould and surface energy,exactness of the inspection model;Chapter six is the conclusion,according to studying the survey this text to some research conclusions of the pore structure and making corresponding prospect to the structure development of pore.The main achievement of this text is a method to analyse through the theory,combine the material science of concrete,relevant knowledge of the composite,through method of mechanical analysis.set up one practical concrete pore structure compound body model comparatively.And through an analysis of test data in documents,examining the science and practicability of the model.According to calculation strength that model receive being with test strength fit very well,the coefficient correlation is very high. Finally,through the parameter analyses , proved further that analyses the necessity that is set up of parameter got through the theory in the model,these have no one that is considered in past pore structure model.The research direction in which this text is discussed is nowadays comparatively rare while studying in strength to the concrete in our country,But corresponding documents are not rarely seen in the world,there are important meanings in the theoretical research of the strength of concrete and material. But because author's level restricts, the places of mistake and careless omission existing in the article,respectful to please make a comment by expert.