High-temperature-resistant anti-cracking concrete and preparation method thereof

Abstract

The invention discloses a high-temperature-resistant anti-cracking concrete and a preparation method thereof. The preparation method comprises the following steps: dissolving a naphthalene water reducer in water, adding graphene, dispersing graphene to prepare a graphene solution, adding an EVA emulsion into the graphene solution, uniformly stirring, carrying out ultrasonic treatment to obtain a mixed solution, adding the mixed solution into concrete production equipment, adding nano titanium dioxide, nano silicon dioxide, nano carbon fibers, cement, fly ash, river sand and gravels into the mixed solution, uniformly mixing to obtain semi-finished product concrete, and finally performing ultrasonic treatment on the semi-finished product concrete to obtain the high-temperature-resistant anti-cracking concrete. The nano titanium dioxide, nano silicon dioxide and nano carbon fibers are added into the high-temperature-resistant anti-cracking concrete, the high-temperature-resistant performance and the compressive strength of the concrete are improved, by adding the graphene, the brittleness of cement is improved, the toughness of the concrete is improved, and therefore microcracks are reduced, and the durability of the concrete is improved.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a high-temperature-resistant and crack-resistant concrete and a preparation method thereof. Background technique [0002] With the economic development and social progress and the continuous increase of population, buildings are becoming more and more dense, high-rise buildings are developing rapidly, and the fire problem of building structures is becoming more and more prominent. Among all kinds of fires, the most frequent and most serious losses are buildings. things catch fire. Concrete is currently the most widely used building material in civil engineering. Concrete structure is the main structural form of buildings. Therefore, the high temperature performance of concrete is very important to the fire behavior of buildings, and concrete will crack severely when subjected to high temperature in fire. , After being subjected to high temperature, the mechanics and durability of concret...

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Problems solved by technology

[0004] In order to overcome the above-mentioned technical problems, the object of the present invention is to provide a kind of high temperature and crack-resistant concrete and its preparation method: by dissolving the naphthalene-based water reducer in water, then adding graphene, and ultrasonically treating the graphene, the Graphene is dispersed until it is completely dissolved to obtain a graphene solution. Add EVA emulsion to the graphene solution, stir it evenly, and use ultrasonic treatment to obtain a mixed solution. Add the mixed solution to the concrete production equipment, and then put nano-titanium dioxide into the mixed solution , nano-silicon dioxide, nano-carbon fiber, and stir evenly to obtain a mixture, then mix the mixture, cement, fly ash, river sand, and gravel evenly to obtain semi-finished concrete, and finally perform ultrasonic treatment on the semi-finished concrete to obtain the High temperature and crack resistance concrete solves the problems of poor high temperature resistance and crack resistance of existing concrete

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