Measuring device for permeability of concrete

Abstract

The utility model relates to a concrete permeability measuring device, which relates to the concrete property measuring technology. The purpose of the method is to overcome the problems of long time and inaccuracy in testing samples in the existing hydrostatic testing method and the time-consuming problem in testing samples in the electric quantity testing method. Its metal pipe (7) has a plurality of through holes (7-1) part embedded in the hole (8-1), the water outlet port of the hydraulic cylinder (1) and the detection port of the pressure gauge (2) pass through the water pipe ( 5) communicate with the upper port of the metal pipe (7), the metal ring (6) is sleeved on the outside of the concrete sample (8), and an input end of the resistance value detection circuit (4) is connected to the metal pipe (7), The other input end of the resistance value detection circuit (4) is connected on the metal ring (6), the weight (3) is sleeved on the upper end of the hydraulic rod (1-1), and the hydraulic rod (1-1) of the hydraulic cylinder (1) 1) The spool at the lower end is set in the hydraulic chamber. The invention can accurately detect the permeability of concrete samples in a short time, and has the advantages of simple structure, low cost and easy operation.

Description

technical field [0001] The invention relates to the technical field of concrete performance measurement. Background technique [0002] The strength and durability of concrete are closely related to its permeability, which is an important technical index for evaluating the quality of concrete. Existing methods for testing the permeability of concrete include hydrostatic testing and electrical testing. The hydrostatic test method is to add water pressure to the concrete sample, and use the permeable pressure as the anti-penetration mark; or split the sample to measure the height of water penetration in the sample. This method not only takes a long time to test, but also the measurement is inaccurate. , the error is large; the electric quantity test method is to immerse the sample in the conductive solution, and the conductive ions penetrate into the sample. Under the external electric field, the permeability of the concrete is detected by measuring the electric quantity flowi...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to overcome the problem that the existing water pressure testing method takes a long time and is inaccurate when testing the sample, and the problem that the electric quantity testing method is time-consuming when testing the sample, and further proposes a concrete penetration test method. permanent measuring device; the present invention is composed of a hydraulic cylinder 1, a pressure gauge 2, a weight 3, a resistance value detection circuit 4, a water pipe 5, a metal ring 6, and a metal pipe 7; a plurality of The through hole 7-1; the part of the metal pipe 7 with a plurality of through holes 7-1 is embedded in the hole 8-1 on the concrete sample 8, and the water outlet port of the hydraulic cylinder 1 and the detection port of the pressure gauge 2 pass through the water pipe 5 It communicates with the upper port of the metal pipe 7, the metal ring 6 is sleeved on the outside of the concrete sample 8, one input end of the resistance value detection circuit 4 is connected to the metal pipe 7, and the other input end of the resistance value detection circuit 4 is connected to the On the metal ring 6, the weight 3 is socketed on the upper end of the hydraulic rod 1-1 exposed on the upper part of the hydraulic cylinder 1, the axis line of the hydraulic cylinder 1 is set vertically, and the valve core at the lower end of the hydraulic rod 1-1 of the hydraulic cylinder 1 is set in the hydraulic chamber

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