The Vibration Mixs Blend The Technique In Concrete Produce Of Application

Traditional concrete mix form have the setting type and forcing type by oneself. The mixer of two forms mix concrete , can reach that macroscopic even within very short time generally. But while observing this kind of mixing material carefully , find that some aggregate surface is dry, there are some small dry cement groups in addition. If grout of even concrete of the macroscopic put under the microscope after mixing, will find that there will not even scattering of the cement grain in water , there is 10%-30% cement particle scattered getting together," reunion " phenomenon takes place. It mixes to be mutual collision , convection between mixture all supplies and spread, impel the particle of the supplies , especially the disperse of the cement particle is distributed, reach macroscopic and micro structural even quality of the concrete. It is the complicated dynamic rheology course to mix and stir the course in vibration. During the beginning of the course that mixing and stiring , mix and stir quality to lean against supplies " extensive circulation" of macroscopical competence flow to realize mainly. Development speed to mix and stir course depend on sport characteristic that supplies flow of the blade which mix and stir, to mix function guarantee circulation of supplies flow by force blade at this moment. At a certain moment of mixing and stiring, every group a copy of circulation flow and spread is distributed to begin to go on at the micro level, mixing and stiring the sport characteristic that the speed not merely depends on the supplies , depend on structure rheology characteristic , particle big or small, alternate superficial size and is it form value of strength ,etc. to glue of supplies. And vibration function make supplies viscidity and interior frictional force of particle reduce greatly, make the sport tempo of the particle of the supplies increase , has increased the number of times of colliding effectively, accelerate cement particle surface hyrate to speed that liquid phase spread , is it fully go on to mix and stir at micro competence to guarantee. In asituation that various kinds of concrete material, admixture and match ratio certainly, in order to be up to various kinds of even distribution which make up the material , form good inside micro organization and structure, vibration is it as concrete making lawing of filling a prescription basic , play an extremely important role to mix.