Cement-based material uniaxial tension measuring device and method

Abstract

The invention discloses a cement-based material uniaxial tension measuring device. The measuring device comprises a bearing screw rod and a strain gauge; the bearing screw rod comprises a first section and two second sections which are respectively connected to two ends of the first section; the diameter of the first section is smaller than that of the second sections; the surface of the first section is smooth; the strain gauge is arranged on the first section; and the strain gauge is used for measuring the strain value of the first section. The invention also discloses a cement-based material uniaxial tension measuring method. With the cement-based material uniaxial tension measuring device of the invention adopted, the stress-strain relation of a cement-based test piece in the whole process of a uniaxial tensile test can be accurately measured.

Description

technical field [0001] The invention relates to the field of structural engineering tests, in particular to a cement-based material uniaxial tensile measuring device and a measuring method. Background technique [0002] In structural engineering, ordinary concrete materials have low tensile strength and are prone to layer brittle failure, which restricts the application range of concrete. The current cement-based composite material refers to a composite material composed of Portland cement as a matrix, mixed with fiber materials, fillers, chemical additives and water through a composite process. This material can greatly improve the strength, toughness, and strength of ordinary concrete. The short board in durability can improve the mechanical properties of concrete materials. For cement-based composite materials, such as ultra-high-performance concrete, fiber-reinforced cement-based composite materials, etc., due to their high tensile strength and toughness, the research o...

AI Technical Summary

Problems solved by technology

However, in the process of uniaxial tensile expansion of the specimen, there will be a phenomenon that the stress-strain relationship of the specimen is difficult to capture due to the sudden decrease in the stiffness of the specimen and the limited stiffness of the testing machine, so the entire stress-strain relationship of the specimen cannot be completely measured. strain relationship

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