Preparation method of concrete capable of performing damage self-reporting

Abstract

The invention discloses a preparation method of concrete capable of performing damage self-reporting. The preparation method comprises the following steps: dissolving PMMA in chloroform; dissolving CVL in phenyl acetate; then putting the materials into a vortex mixer to perform vortex mixing, so as to obtain an oil phase; adding silica sol into distilled water and serving the silica sol as a continuous phase, and then performing vortex mixing on the continuous phase and the oil phase, so as to obtain pre-emulsion; adding a 1M HCl solution into the pre-emulsion, and adjusting the pH of the pre-emulsion to be 8.0; then performing ultrasonic bath in a condition of ice bath cooling, so as to form oil-in-water emulsion; stirring the obtained emulsion in a preheating oil bath at 40 DEG C, so asto evaporate the chloroform and to obtain suspension liquid; cooling the suspension liquid to room temperature, and performing vacuum filtration, so as to obtain microcapsules; adding a microcapsule dispersion system into concrete pulp and stirring, and pouring, so as to obtain the concrete capable of performing damage self-reporting. The preparation method has the advantages that visual sensing and concrete damage monitoring are combined, color changing indicates cracks, the method is intuitive and clear, the sensitivity is high, and the construction difficulty can be reduced.

Description

technical field [0001] The invention relates to the field of concrete structure health monitoring, in particular to a method for preparing concrete capable of self-reporting damage. Background technique [0002] With the continuous development of the construction industry, a large number of engineering constructions are carried out in various places, but often due to various defects in design and construction quality, the buildings or structures are strained during the trial period. If the strain is too large, it will affect the structure. safety and durability. Therefore, it is particularly important to monitor the health of structures. [0003] At present, the structural health monitoring of buildings is mainly based on strain monitoring, relying on strain sensors, such as distributed optical fiber sensors. However, the traditional distributed optical fiber sensor has various shortcomings due to the optical fiber itself, which leads to the disadvantages of high cost, lar...

AI Technical Summary

Problems solved by technology

[0011] In order to solve the above technical problems, one of the objectives of the present invention is to provide a microcapsule dispersion system or a capsule-type visual strain sensor, which is applied to the structural health monitoring of concrete structures, and can perform real-time in-situ monitoring , the effect is intuitive and obvious, and the sensitivity is high, so as to solve the problems of the existing strain sensor such as complex process, inability to detect in situ in real time, poor precision, and large detection position limitations

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