Pre-press bottom-pushing type test mold

Abstract

The invention relates to a test mold for manufacturing a test piece for testing basic mechanical properties of building materials and discloses a pre-press bottom-pushing type test mold. The test mold comprises a top pressing device, an upper test mold body, a lower test mold body, a bottom pushing device and a bottom-pushing threaded rod, wherein a test piece is arranged in the upper test mold body; the upper test mold body and the lower test mold body are in threaded connection; the bottom pushing device is arranged in the lower test mold body and performs mold stripping under axial force applied by the bottom-pushing threaded rod. Additionally, loads applied to the axial direction of the test piece is converted to loads on the edge of the test piece through a designed hollow cylinder structure transition zone; during mold stripping, pre-press force is applied to the upper part and the lower part of the test piece, so that the test piece can be slowly pushed out of the upper test mold body under the constrained condition, and the defects of edge missing and corner missing of the test piece can be effectively avoided during mold stripping in the structure design manner. The test mold is designed on the basis of optimization of a traditional test mold structure, is easy to strip, has good water retention performance, can be used for manufacturing test pieces made of different materials and in different sizes and has a wide application range.

Description

technical field [0001] The invention relates to a test mold for making test pieces for testing basic mechanical properties of building materials, in particular to a preloaded bottom push type test mold. Background technique [0002] When the laboratory studies the basic mechanical properties of various composite materials such as concrete and cemented sand, it is necessary to make corresponding test pieces through test molds. According to the material, sealing form and link form of the test mold, the test mold presents various However, no matter what kind of mold trial, it is necessary to consider whether it is convenient to remove the mold, whether it will damage the specimen when removing the mold, whether the top and bottom of the specimen are flat, whether the mold has good water retention, etc. . [0003] The trial molds retrieved at present only consider the above problems, but there are still many other problems, such as: (1) before concrete pouring, a layer of relea...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the inconvenient demolition of the existing test mold, the test piece will be damaged when the form is removed, the top and bottom of the test piece are easy to lose edges and corners, the water retention of the test mold is poor, and the scope of application of the test mold is small. The present invention Provide a preloaded bottom push type trial mold

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