Detachable mold used for adhesion test of PVA fiber bundles and cement-based material

Abstract

A detachable mold used for adhesion test of PVA fiber bundles and cement-based material includes: a bottom plate, side plates (2), two end plates (3), an outer threaded rod (4) and a large separationboard (6), wherein the side plates (2), end plates (3) and large separation board (6) are disposed on the bottom plate (1). The side plates are arranged in parallel, wherein the two end plates (3) arerespectively arranged at two ends of the side plates to form a groove structure with the side plates. The large separation board (6) is located in the groove structure. At the same height, holes arereserved in the large separation board (6) and the end plates for enabling the fiber bundles to pass through, sizes of the holes being equal. The mold allows a test piece to be detached conveniently,can increase the completeness of the shaped test piece and guarantees precision of a prefabricated seam, so that test data is more actual and reliable. The mold has simple structure and can improve test piece shaping efficiency.

Description

Technical field: [0001] The patent of the invention relates to a detachable mold for a cement-based composite material test piece, in particular to a detachable mold for forming a three-point bending bonding performance test block of PVA fiber and cement-based composite material. Background technique: [0002] To measure the bonding performance of PVA fibers and cement-based composites from a microscopic point of view, it is necessary to evenly distribute the PVA fibers on a certain level of the cement-based composite specimens, and ensure that the PVA fibers are in a horizontal state in the cement-based composites. The test piece made by the existing mold cannot ensure that the fibers are evenly distributed on the cement-based composite material test piece at a certain height and level, and at the same time, it cannot meet the requirements that the fibers maintain a horizontal state in the cement-based composite material test piece. [0003] For the specimens subjected to t...

AI Technical Summary

Problems solved by technology

The expansion joints made by the existing mold are made of the end of the pre-embedded small steel plate. However, the pre-embedded small steel plate is prone to misalignment and movement during the vibration process of the cement-based composite material, which makes the size of the pre-fabricated crack different from the design size, reducing the The accuracy of the test piece is reduced, thereby reducing the accuracy and authenticity of the experiment

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