Impermeability Of Concrete With Different Cementitious Materials At Different Temperatures

In this thesis,we study the two variables of different cementitious materials and different temperature and humidity environments.First of all,the laboratory for micro-impermeability research,mainly with the domestic advanced advanced gas permeability test equipment for ordinary Portland cement and composite Portland cement two different cementitious materials prepared concrete specimens,at room temperature and 105 High temperature,high precision and strong gas permeability test,supplemented by domestic commonly used liquid impermeability test;Secondly,in the macro,to build the company to provide six examples of engineering companies rely on,through the The application and analysis of cracking resistance of concrete with different strength grade,the application and analysis of cracking resistance of concrete with different thickness,and obtain the law of anti-cracking of concrete and the construction technology of underground concrete.Thirdly,combining with macroscopic and microscopic Two aspects of the test and research,summed up the different uses of concrete impermeability of the general rules and construction should be the main technical measures.In this thesis,based on the brief analysis of the present situation of concrete under different concrete materials and different "double mixing technology" concrete and concrete under different temperature environment and the influencing factors of concrete permeability,the effects of different cementitious materials Concrete infiltration mechanism was analyzed in detail,and the calculation method of gas permeability and liquid permeability was introduced.Through the gas permeability test,the concrete samples prepared by the general silicon and the composite silicon cement were tested in the three groups at room temperature and 105 ? under high temperature environment.(2)the gas permeation test is more accurate than the liquid permeability test,and the permeability of the concrete is better than that of the concrete.(3)Under normal temperature,the concrete prepared by composite silicon cement has higher permeability and concrete permeability than ordinary silicon cement.However,under the high temperature,the concrete prepared by composite silicon cement and the concrete prepared by the general silicon cement(4)the high temperature of the concrete prepared by the two kinds of cementitious materials increases the apparent permeability of the concrete by an order of magnitude,that is,10 times higher than that of the concrete,which is not the same as that of the composite silicate.about.The purpose of this thesis is to examine and find out the macroscopic and microscopic laws of concrete penetration and the technical measures to solve this problem by studying the most important material of concrete building,the infiltration of concrete,the important index of concrete durability.For the impervious requirements of the components(floor,underground walls,etc.).