Device for testing cement hydration heat at constant temperature

Abstract

The invention relates to a device for testing cement hydration heat at a constant temperature. The device comprises a computer provided with an automatic temperature control system, a temperature recorder, two metal boxes and a triglyceride box. An iron cylinder is arranged in one metal box, and a foam base plate fixed by wooden base plates on the surrounding is arranged on a lower surface of theiron cylinder; a wide-mouth thermos bottle is fixed in the iron cylinder, and a polystyrene foam plastic cover is arranged at the opening of the thermos bottle; temperature probes I-IV are respectively inserted on the foam plastic cover, and the temperature probes I-IV are respectively connected with the temperature recorder; the triglyceride box is arranged in the other metal box, and a refrigeration compressor and a heater are respectively arranged at the bottom of the triglyceride box; a circulating infusion tube II is arranged on the triglyceride box, and the circulating infusion tube IIis connected with a circulating infusion tube I that is inserted into the foam plastic cover via a metering pump; and the temperature recorder, the refrigeration compressor and the heater are respectively connected with the computer via data lines. The device provided by the invention can achieve automatic test, and the accuracy is high.

Description

technical field [0001] The invention relates to the technical field of cement detection, in particular to a device for testing cement hydration heat at a constant temperature. Background technique [0002] During the cement hydration process, a series of chemical reactions take place between each component and water, and a large amount of heat of hydration is released. The hydration reaction of cement is a long kinetic process. The current methods for testing the heat of hydration of cement mainly include: Heat of solution method (reference method) and direct determination method. [0003] Direct determination method (GB / T 2022-1980) is a standard test method with simple operation, no need of other chemical reagents and no pollution. The principle is: the cement mortar is hydrated in a specific environment, and then the hydration heat of cement at each age is obtained according to the amount of cement hydration heat accumulated and lost. The direct method can measure the h...

AI Technical Summary

Problems solved by technology

However, due to the limitation of device design and energy consumption in this method, the instrument can only be used for the measurement of cement slurry, and the temperature change curve cannot be captured; in addition, due to the strict limitation on the size of the sample, whether the too small sample has enough Representativeness is also an issue

At the same time, the existing equipment lacks a constant temperature environment during the heat of hydration test

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