Constant-pressure concrete permeability testing device

Abstract

The invention discloses a constant-pressure concrete permeability testing device which comprises a permeameter, wherein the permeameter comprises a pressure water tank and a test-piece groove; the upper end of the pressure water tank is closed and provided with a pressure regulating valve and an air inlet valve; meanwhile, the air inlet valve is used as a water inlet valve; the lower end of the pressure water tank is open and closely connected with an opening in the upper end of the test-piece groove; an inner cavity of the test-piece groove penetrates through in an up-and-down through mode, the inner wall of the test-piece groove is provided with a partition cushion, the circumferential side as well as the edges of the upper and lower end surface of a test-piece to be tested are both attached to the partition cushion, and the test-piece groove can press against the partition cushion and the test-piece to be tested; a water containing container is arranged below the test-piece groove; the water containing container is placed on a balance. According to the device, a previous method for pressurizing through still water is changed, and the pressurizing is implemented by using an air compressor, so that an added pressure is effectively controlled and directly observed, and the test cycle is shortened. Seeped water is received by the water containing container and the electronic balance, the quantity of the seeped water is recorded in real time by using a computer, and a permeability coefficient is calculated in combination with the Darcy law. The device is good in sealing property, simple in operation easy to oeprate and high in testing accuracy.

Description

technical field [0001] The invention relates to a concrete water permeability testing instrument and equipment, in particular to a constant pressure concrete permeability testing device, which is suitable for measuring the water permeability coefficient of cement-based composite materials. Background technique [0002] As an artificial material, cement concrete is the most widely used civil construction material in the world. Generally speaking, concrete is used as a protective engineering material in dams, river banks and other projects. While considering its strength and deformation, its penetration Sex must also be considered. The permeability of concrete is closely related to the durability of concrete, and it is often considered that the permeability is an important index to evaluate the durability of concrete. [0003] At present, the impermeability marking method adopted by our country for the permeability test of cement-based composite materials is to superimpose a ...

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved: Aiming at the deficiencies of the prior art, the constant-pressure concrete permeability testing device provided by the present invention solves the problem of using the impermeabili

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