Study On Ingredient And Craftsmanship Of Air-Proof Concrete

Taken as the nuclear reactor pressure vessel,the seawater desalination installment shell of tank,under the water treatment trough,the high gas land sector tunnel lining work,the Air-proof concrete is took.Thus many countries have been conducting researches on its allocated proportion,the craftsmanship,the test method as well as the evaluation standard. But generally speaking not too much achievements have been made in this field.At present the most popular methods used in this field are the constant pressure law and the live pressure law.This paper rely on the problems of concrete duration which have been mentioned in the previous chapter.At the same time,it combines the requirements needed in the Dacheng Railroad Tiantai temple,i.e.the research on the proportion and craftsmanship about anti-corrosion and air-proof.With the employment of the orthogonal design,the paper taken into account the effects caused by raw material(gel gelling material,aggregate,admixture)and their proportion.And other focus lies in the effect of sediment percent of aggregate on the air-proof of concrete.Then a research on construction craftsmanship in-situs is conducted including stirring time,vibrating time,pumping time.stirring modes curing conditions and so on.Through a series of experiments,feasible,practical,the economical concrete, proportion and favorable air-proof craftsmanship are finally obtained.And they can be taken as a guide to in-situs construction.