Pure-shearing experimental device for new and old concrete bonding interfaces

Abstract

The invention relates to a novel experimental device in the field of hydraulic and civil engineering and particularly relates to a pure-shearing experimental device for new and old concrete bonding interfaces. The pure-shearing experimental device comprises an upper L-shaped clamp, a lower L-shaped clamp, bolts, a side-surface chuck, a concrete test piece, an experimental machine base, an experimental machine pressing head, screws and a spring. The novel experimental device has the advantages that the size is small, the preparation is simple, the use is convenient, the assembly and the disassembly are convenient, the pure-shearing experiment can be carried out on the new and old concrete bonding interfaces under the pure-shearing condition, the shearing strength of the new and old concrete bonding interfaces under the pure-shearing action can be tested, the shearing stress performance of a new reinforced concrete structure can be analyzed, the shearing strength parameter of the bonding interfaces is provided and can be used as the mechanical property index for the reinforcement and restoration design of the concrete structure, and simultaneously technical guidance is provided for treating the new and old concrete bonding interfaces in concrete reinforcement construction.

Description

technical field [0001] The invention relates to a novel experimental device in the field of water conservancy and civil engineering, in particular to a pure shear experimental device for bonding interface between old and new concrete. Background technique [0002] Concrete, referred to as concrete, refers to the collective name of engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Generally speaking, concrete refers to the cement concrete obtained by using cement as the cementitious material, sand and stone as the aggregate, mixed with water, admixtures and admixtures in a certain proportion, and stirred. It is widely used in water conservancy and civil engineering. Under the action of various service loads and erosive environments, the concrete structure has produced quite serious aging, disease and accidents, which reduces the safety and durability of the structure and seriously affects the normal use of the building an...

AI Technical Summary

Problems solved by technology

In fact, the shear test results of the new-old concrete bond interface obtained through this type of test piece can only be said to be direct shear, not the pure shear strength of concrete.

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