Pervious concrete test piece forming device and forming method thereof

Abstract

The invention discloses a pervious concrete test piece forming device and a forming method thereof. The pervious concrete test piece forming device comprises a force application assembly, a counterforce frame and a test mould and can achieve compression-vibration combined forming of a previous concrete test piece; furthermore, in a concrete vibration process, force can be continuously applied to acushion plate above concrete through the force application assembly, so that the phenomenon that cavities partially appear after the pervious concrete test piece is formed is effectively avoided. According to the forming method, a body of the test mold is filled with green concrete twice, many times of vibrating falling operation is performed respectively, so that the green concrete filled into the body of the test mold has very good compactness, and the settling volume of the concrete in the vibration process is effectively reduced; furthermore, pressure on the cushion plate above the concrete can be accurately calculated out by a dividing ruler on a screw, and the settling volume of the green concrete can be compensated in time in the vibration process; thus, surface stress of the greenconcrete is ensured, the forming method has the advantages of simpleness and high operability, and a test piece forming effect is good.

Description

technical field [0001] The invention relates to the technical field of forming a permeable concrete test piece, in particular to a forming device and a forming method for a permeable concrete test piece. Background technique [0002] With the continuous advancement of my country's "sponge city" plan, people's research on permeable concrete is getting more and more in-depth. Because different forming methods of permeable concrete specimens have a great influence on its strength, even concrete with the same mix ratio can be molded in different ways. The strength of the specimens made by the method is also different. At present, for the forming methods of permeable concrete specimens, there are three commonly used methods: rolling method, static pressure method and vibration method. For the rolling method and static pressure method, the water permeability is good, but the concrete strength is not high. The vibration method The test mold is placed on a concrete vibrating table f...

AI Technical Summary

Problems solved by technology

At present, for the forming methods of permeable concrete specimens, there are three commonly used methods: rolling method, static pressure method and vibration method. For the rolling method and static pressure method, the water permeability is good, but the concrete strength is not high. The vibration method The test mold is placed on a concrete vibrating table for vibration molding, which has high strength, but it is easy to cause hole blockage and poor water permeability. The traditional pressurized vibration method only uses a pressure piece to apply a pressure before the vibration starts, but the vibration During the process, the concrete will settle in the test mold, causing the applied pressure to gradually decrease or even disappear, resulting in local voids after the permeable concrete specimen is formed. In order to solve the above problems, it is urgent to provide a vibrating table. A test piece forming device and a corresponding forming method that can continuously receive a certain pressure on the top surface of a concrete test piece while vibrating upward

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