METHOD FOR PREPARING DAMAGE-SELF-REPORTING CONCRETE

摘要

Disclosed is a method for preparing a damage-self-reporting concrete, comprising the steps of dissolving PMMA in chloroform; dissolving CVL in phenyl acetate; then placing same in a vortex mixer for vortex mixing, so as to obtain an oil phase; adding a silica sol to distilled water as a continuous phase, and then subjecting the continuous phase and the oil phase to vortex mixing so as to obtain a pre-emulsion; adding a 1 M HCl solution to the pre-emulsion, and adjusting the pH of the pre-emulsion to 8.0; then subjecting same to an ultrasonic bath under ice bath cooling conditions to form an oil-in-water emulsion; stirring the resulting emulsion in a pre-heated oil bath at 40ºC to evaporate the chloroform, so as to obtain a suspension; cooling the resulting suspension to room temperature, and subjecting same to vacuum filtration to obtain a microcapsule; and adding a dispersion system of the microcapsules to a concrete slurry and stirring same, and casting same so as to obtain the damage-self-reporting concrete. The method combines visual sensing and concrete damage monitoring, that is to say, a color change means that a crack appears, which is intuitional and clear, and same has a high sensitivity and can reduce construction difficulties.