A device for real-time observation of the hydration process of cement-based materials by low-field nuclear magnetic resonance

Abstract

The invention provides a device for realizing the real-time observation of the hydration process of cement-based materials by low-field nuclear magnetic resonance, and belongs to the technical field of cement base material research. The device includes a ceramic spiral tube, a heat pipe, an internal heat insulation layer, a support ring, an external heat insulation layer, a heat dissipation layer, a circulating heating system, and a circulating cooling system. The ceramic spiral tube is laid with an internal heat insulating layer, and the internal heat insulating layer is supported The ring is connected to the outer heat insulation layer, the heat pipe is wound on the ceramic spiral tube, the outer heat dissipation layer is covered on the outer heat insulation layer, the outer heat insulation layer temperature measurement optical fiber is set on the outer heat insulation layer, and the ceramic tube temperature measurement fiber is set on the ceramic threaded tube , the heat insulation layer at the opening end of the ceramic threaded pipe is not closed, and the passage of the cover is reserved. The device is simple in structure, low in cost, detachable, reusable, and less difficult to operate. It can realize real-time observation of the hydration characteristics of cement-based materials at different temperatures without modifying or replacing equipment, and reduces test costs.

Description

technical field [0001] The invention relates to the technical field of cement base material research, in particular to a device for realizing real-time observation of the hydration process of cement base materials by low-field nuclear magnetic resonance. Background technique [0002] Cement is one of the most commonly used engineering materials at present, and is widely used in civil engineering, mining engineering, tunnel engineering and other fields, so its properties are directly related to the structural safety and service life of the project. Based on cement, a variety of functional materials have been developed and formed, which can be collectively referred to as cement-based materials, such as concrete, cemented fillings, and various cementitious materials. Cement-based materials mainly undergo hydration reactions with water, thereby gradually coagulating and hardening to produce strength. Therefore, the hydration process directly affects the final properties of cemen...

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Problems solved by technology

[0006] In order to solve the problems that the existing low-field nuclear magnetic resonance equipment cannot observe the hydration process of cement-based materials at different temperatures in real time, and the equipment modification technology is complicated and the cost is high, the invention provides a method for realizing real-time observation of the hydration of cement-based materials by low-field nuclear magnetic resonance process device

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