Forming mold and preparation method for testing the interface fracture performance of heterogeneous concrete

Abstract

A forming mold for testing the fracture performance of dissimilar concrete interfaces and a preparation method, the forming mold comprises a base plate, two front and rear baffles, two left and right baffles, an isolation baffle and a pre-embedded plate, wherein the base plate, the front and rear baffles It is fixed perpendicular to the left and right baffles to form the forming cavity of the dissimilar concrete composite specimen. The middle of one left and right baffles is provided with a cubic protrusion extending downward from the top to the bottom plate; the two sides of the isolation baffles are respectively fixed on The opposite side of the cubic protrusion and the other left and right baffles; one side end of the embedded plate is fixed on the cubic protrusion, and the other opposite side end is suspended. The present invention also provides a method for preparing a dissimilar concrete composite specimen by using the forming mold, which has the advantages of simple operation, low cost and reusability, and can precisely control the interface position of dissimilar concrete to ensure that no material intermixing occurs at the interface position, so as to reveal The law of fracture performance of dissimilar concrete interface provides technical support for the design of dissimilar concrete structures.

Description

technical field [0001] The invention relates to the field of hydraulic structures, in particular to a forming mold and a preparation method for testing the interface fracture performance of heterogeneous concrete. Background technique [0002] The dam is the core main building in the water conservancy project, and its safety is the key to the whole project. The different parts of the dam body partition have different working conditions, and the defects caused by the differences in the "structural characteristics" and "material properties" of each part of the dam body are directly related to the quality and durability of the engineering structure. How to consider the influence of the splitting strength of different concrete interfaces through indoor experiments is one of the research directions of hydraulic structures. At present, the splitting strength measurement molds of concrete specimens used in laboratories mostly measure a single concrete material, and it is difficult ...

AI Technical Summary

Problems solved by technology

How to consider the influence of the splitting strength of different concrete interfaces through indoor experiments is one of the research directions of hydraulic structures. At present, the splitting strength measurement molds of concrete specimens used in laboratories mostly measure a single concrete material, and it is difficult to prepare concrete with a clear interface by using the above molds. Composite specimens that can measure the splitting strength of dissimilar concrete cannot reflect the influence of the interfacial bonding effect of dissimilar concrete on the splitting strength in hydraulic structural engineering

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