Experimental Study On The Lateral Pressure Of Self-compacting Concrete On Formwork

With the innovation of modern industrial technology,buildings can be manufactured in batches like machine production,and gradually forming the development trend of integrated design,industrialized production,assembly construction,integrated decoration,information management,and intelligent applications.Prefabricated building is a component that is processed in the factory to the construction site and is installed on the site through reliable connection technology.Among them,the vertical seam is a common structural form of prefabricated buildings.The two sides of the vertical seam are prefabricated components.The core area is formed by binding steel bars and post-cast concrete in the vertical seam to ensure the reliable connection of the prefabricated components on both sides of the vertical seam.Due to the dense steel bars in the vertical seam area,there are problems such as poor compaction when using ordinary concrete pouring.In addition,the width of the vertical seam is generally small,and the traditional formwork form is more complicated,which does not match the needs of modern and efficient construction.Therefore,this article takes the vertical seams of prefabricated buildings as the research object.Adopt self-compacting concrete for vertical seam pouring,and use the large flow of self-compacting concrete to solve the problem of poor concrete pouring.Through the 1:1 component model test,the size and distribution of the lateral pressure of the self-compacting concrete on the formwork is studied,and the formwork structure form is optimized to provide support for engineering applications.The main research contents and results of this article are as follows:(1)The micro-expanded self-compacting concrete with different strength grades and different slump expansion degrees is designed,and the mixing ratio test is good.(2)Through the high throw pouring method adopt in the simulation demonstration project,the experimental research on the lateral pressure of the self-compacting concrete with different strength grades and different slump extensions on the formwork is carried out.The size and distribution of lateral pressure of self-compacting concrete on formwork is obtained.research shows: The lateral pressure of self-compacting concrete on the formwork increases with the increase of strength and slump expansion;The lateral pressure at the bottom of the template is the largest,and the lateral pressure changes approximately linearly along the height of the template,close to the trend of hydrostatic pressure change;After the lateral pressure of the template height below 600 mm reaches the peak value,it decreases significantly to a certain value and stabilizes with the increase of time;After the lateral pressure of the template height of 1200 mm reaches the peak,the change with time increases is small.(3)On the basis of experimental research,ANSYS finite element software is used to optimize the structure of the steel and aluminum formwork to be used,and the deformation and force under the action of linearly varying loads are analyzed;The results show that the optimally designed steel template and aluminum template have good stress and deformation,and meet the requirements of template design specifications.At the same time,the aluminum template is lighter and has more advantages than steel template.