A method for preparing and constructing concrete with anti-cracking and anti-freezing properties

Abstract

The present application relates to the technical field of concrete, and particularly relates to a concrete preparation method and construction method with anti-cracking and anti-freezing properties, which comprises Portland cement, fly ash, medium sand, gravel, mixing water, air entraining agent, PCE water reducing agent, carbon black-PCM composite particles, modified silicon dioxide and modified macroporous polystyrene resin. During the day, carbon black converts light energy into heat energy, and the amide bond induces and accelerates the heat generated by carbon black to be transferred to PCM microcapsules. PCM stores heat through phase change. At night, the temperature decreases, and PCM releases heat, providing a favorable environment for continuous hydration of cement. Modified macroporous polystyrene resin makes carbon black-PCM composite particles uniformly disperse around cement. Moreover, macroporous polystyrene resin can directly adsorb leaked paraffin, avoiding its influence on the hydration reaction of cement. Modified silicon dioxide grafted with alkyl polyoxyethylene ether constructs a nano-hydrophilic network between carbon black-PCM composite particles, so that water needed for cement hydration can smoothly enter.

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