Concrete AC resistance measurer

Abstract

The invention belongs to the technical field of the civil engineering material performance testing equipment, and relates to a concrete AC resistance measurer. A master control CPU, a driving circuit,a measurement circuit and a liquid crystal screen display circuit are integrated into the measurer; the master control CPU is electrically connected with each of the driving circuit, the measurementcircuit and the liquid crystal screen display circuit; the driving circuit is electrically connected with the measurement circuit; the liquid crystal screen display circuit is electrically connected with an external liquid crystal screen, thereby providing the AC in voltage at 1 volt and the frequency at 1000 hertz; the concrete test piece is measured; a resistance value and the permeability are directly and conveniently displayed on the liquid crystal screen; the measurement process is simple, the testing speed is fast, the operation is convenient, a complex external circuit is avoided, the measurement time is short, and an operation of measuring a charge numerical value passing through the concrete test piece for a long time is avoided; the measurer is simple in structure and convenientto carry; the influence on the testing precision by the polarization reaction and overtop temperature can be avoided, and the measurer has high practical value.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of civil engineering material performance testing equipment, and relates to a concrete AC resistance measuring device, which can intuitively and quickly measure the chloride ion permeability resistance of concrete. [0003] Background technique: [0004] During the service life cycle of concrete structural components in construction engineering, under the influence of freeze-thaw, carbonation, acid-base corrosion or alkali-aggregate reaction, the use function and structural safety will be destroyed; since the 1960s , the durability of concrete has been paid more and more attention by experts and scholars, and it is one of the problems that cannot be ignored in the current civil engineering field. After years of research, it has been found that various failure mechanisms that affect the durability of concrete are related to the permeability of concrete. The permeability of concrete refers to the ease o...

AI Technical Summary

Problems solved by technology

The direct current electricity method is easy to operate, but there are obvious disadvantages: when a high voltage above 60V is applied, the temperature of the solution in the test tank will rise due to polarization reaction, which will affect the test results; if the test voltage is lowered, it will be greatly prolonged. The test time; in addition, the test results are also affected by the chemical composition of the pore solution, etc.

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