Device for testing water absorption coefficient of material and method for measuring water absorption coefficient of material

Abstract

The invention provides a device for testing a water absorption coefficient of a material and a method for measuring the water absorption coefficient of the material. The device includes a constant temperature water bath, a temperature control water tank and a test water tank, wherein the constant temperature water bath is used for providing constant temperature water for the temperature control water tank; the temperature control water tank is connected to the constant temperature water bath through a water pipe and used for storing the constant temperature water, wherein a closed space can beformed by the temperature control water tank, and a bracket for supporting a test water tank is arranged at the bottom of an inner side of the temperature control water tank; and the test water tankis placed on the bracket and used for storing test water, wherein a support for supporting a test piece is arranged at the bottom of an inner side of the test water tank, the test water tank is partlyimmersed in the water in a control water tank, and the test water tank is made of a heat conduction material. An experimental device for constructing a test microenvironment and controlling temperature by circulation of constant temperature water is proposed, so that the water absorption coefficient of the material is further measured accurately. The temperature of the test environment can be changed by adjusting the temperature of circulating water to study changes of the water absorption coefficient of the material at the temperature. In addition, temperature control is more accurate compared with the prior art, and the temperature can be adjusted and controlled in a wider range.

Description

technical field [0001] The invention relates to the technical field of building material research, in particular to a material water absorption coefficient testing device and a measuring method. Background technique [0002] Moisture transfer and moisture absorption and desorption of building materials have received increasing attention, which not only affects the heat transfer of building envelopes, but is also closely related to indoor air quality and housing durability. In order to predict the migration of moisture in the building envelope and its effect on heat transfer, there are currently many models, and the premise of using these models is to accurately obtain the wet physical parameters of the material, which has become one of the factors restricting the calculation of heat-moisture coupling . [0003] The water absorption coefficient reflects the moisture transfer characteristics of porous building materials and is related to the liquid water diffusion coefficient...

AI Technical Summary

Problems solved by technology

The current research results have proved that temperature has an influence on the water absorption coefficient, but there is no water absorption coefficient test device that can accurately control the test environment. The existing temperature control method is generally to place the test water tank and the specimen in the room, and control the temperature of the room. Test the effect of the experimental temperature. Such a temperature control method is neither accurate nor has the problem of limited setting of the operating point.

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