A Calculation Method of Specific Heat Capacity of Concrete

Abstract

The invention discloses a method for calculating the specific heat capacity of concrete. The method includes the following steps that the total mass of a concrete test block to be tested is determined, and the matching ratio of concrete is obtained; specific heat of water, coarse aggregate, fine aggregate and cement stone is determined; at normal temperature and normal pressure, a concrete test block is prepared according to the matching ratio of concrete; water in the prepared concrete test block is removed, and the mass of the concrete test block is measured after drying; the mass of cement stone of the prepared concrete test block is obtained; the mass of pore water in the concrete test block to be measured is obtained, and the mass of coarse aggregate, the mass of fine aggregate and the mass of cement stone in the dried concrete test block are obtained; the masses of the pore water, the coarse aggregate, the fine aggregate and the cement stone are multiplied by respective specific heat to obtain the specific heat of concrete to be measured. The specific heat of the concrete can be quickly calculated according to the matching ratio of concrete, complex operation and calculation errors caused when the specific heat of concrete is measured by a testing instrument are avoided, and an economical and scientific method is provided for calculation of specific heat of concrete.

Description

technical field [0001] The invention belongs to the technical field of concrete materials, and in particular relates to a calculation method of specific heat capacity of concrete, which is used for estimating the specific heat of concrete. Background technique [0002] With the rapid development of cities, people's quality of life has been significantly improved. But what follows is a large amount of energy consumption. Making full use of the building's own thermal insulation performance can effectively reduce the exchange rate of indoor and outdoor heat energy, thereby achieving the purpose of saving energy. The thermal insulation performance of concrete itself depends on its specific heat capacity (abbreviated as specific heat) and thermal conductivity, among which specific heat is one of the important thermophysical parameters of concrete. The specific heat of a material reflects the ability of a substance to hold heat, so determining its specific heat is a very importa...

AI Technical Summary

Problems solved by technology

However, the DSC method has very high requirements on the experimental conditions (heating rate and gas properties) and sample characteristics (sample amount, particle size, geometric shape and thermal history of the sample), which makes the method cumbersome and complicated in operation and calculation. There are large errors in the calculation results

[0004] There are some problems in the above-mentioned specific heat capacity tester, differential thermal analysis method and differential scanning calorimetry method for measuring specific heat, that is, the test equipment is expensive, the operation is complicated, the environmental requirements are high, and some test principles or test methods are not suitable for The theoretical knowledge of testers and the operation requirements of related test instruments are relatively high

Even some methods need to be compared with the standard, which leads to certain errors in the test results

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