Cement-based material drying depth testing method

Abstract

The invention is applicable to the field of material determination or analysis and provides a cement-based material drying depth testing method. The cement-based material drying depth testing method includes the steps of preparing a cement-based material test piece; drying the cement-based material test piece; subjecting the cement-based material test piece to electrochemical impedance spectroscopy test, determining an impedance spectroscopy test mathematic model and determining electrical resistivity thereof; determining a cement-based material drying depth testing mathematic model. The cement-based material drying depth testing method takes the influence of electrical resistivity change on the mathematic model into consideration and reflects and reckons the cement-based material drying depth through rule change of electrochemical parameters, so that precision is improved and a great quantity of labor, time and cost are saved.

Description

technical field [0001] The invention belongs to the field of material measurement or analysis, in particular to a method for testing the drying depth of cement-based materials. Background technique [0002] Cement-based materials include cement paste, cement mortar, cement concrete, reinforced concrete and their products; cement-based materials are widely used in engineering due to their excellent performance, low cost and easy availability. Affected by the use environment, cement-based materials are in a state of drying from the outside to the inside in most cases after molding, and the degree and depth of drying have an important impact on its performance. For example, after the surface is dried, it will cause cracking and peeling on the surface, which will affect the durability of the structure. Therefore, it is of great significance to study the drying depth of cement-based materials. [0003] However, most of the current testing methods for the drying depth of cement-...

AI Technical Summary

Problems solved by technology

[0003] However, most of the current testing methods for the drying depth of cement-based materials are destructive tests, and the drying depth test can only be carried out after the cement-based materials are damaged.

This test method is cumbersome, requires a lot of manpower and time, the test efficiency is relatively low, and continuous tracking test cannot be carried out

In addition, the existing non-destructive testing of cement-based materials using electrochemical impedance spectroscopy does not calculate the drying depth, and all regard the cement-based material as an individual with uniform conductivity, and do not consider the internal resistance of the cement-based material sample. The impact of possible changes in the rate on the mathematical model

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