Mold for concrete axial tension test piece and rod piece pre-embedding method by using the mold

Abstract

The invention relates to a test mold, and particularly relates to a dumbbell-shaped mold used for concrete uniaxial tension test, and a rod piece pre-embedding method. The mold for the concrete axial tension test piece comprises a bottom plate. Two opposite sides of the bottom plate are fixedly connected with side plates; the other two opposite sides of the bottom plate are provided with end part plates; the bottom plate, the side plates and the end part plates are combined to form a hollow box with the top opening; the opposite sides of the two side plates are convex at the middle parts to form lug bosses; two sides of each side plate are provided with insert holes protruding out of the planes of the end part plates; a horizontal rod is connected between the directly opposite insert holes of the two side plates; a through hole I is formed in the middle of the horizontal rod; a vertical rod penetrates through the through hole and then is inserted in a fixed hole arranged in the bottom plate; the end part plates are limited by the horizontal rod and the vertical rod; a through hole II is formed in each end part plate respectively; and pre-embedding pieces are inserted into the through holes II. The manufacturing precision of the test piece is high and a flow for manufacturing the test piece is simple.

Description

technical field [0001] The invention relates to a test mold, in particular to a dumbbell-shaped mold for concrete uniaxial tension test and a pre-embedded method for rods. Background technique [0002] Axial tensile test is the most basic test method, which can directly and accurately measure the axial tensile strength of concrete, and is also the only feasible method to obtain the uniaxial tensile stress-strain relationship curve. The axial tension test has important theoretical and practical significance in the research of various concrete tensile performance parameters and the fracture performance and mechanism of various material components. In recent years, more and more attention has been paid to the durability of concrete structures under the combined effects of mechanical loads and environmental factors. The durability of concrete structures under uniaxial tension and compression stresses can directly reflect the impact of stress levels on structural life. Impact. ...

AI Technical Summary

Problems solved by technology

At present, there are few types of molds used to make embedded concrete axial tension test pieces, and the axial tension effect is poor; especially the positioning and embedding procedures of embedded rods are complicated, and the verticality is difficult to guarantee

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