High-temperature-resistant anticracking concrete and preparation method thereof

Abstract

The invention discloses high-temperature-resistant anticracking concrete and a preparation method thereof. The preparation method comprises the following steps: firstly, adsorbing aerogel on the roughsurfaces of glass beads, and coating with a modified polypropylene layer to obtain modified beads; preparing porous ceramic balls by using sepiolite and other natural wastes as raw materials, and grafting epoxy groups outside the porous ceramic balls to obtain modified ceramic balls; using modified rubber as an adhesive material, combining the modified ceramic balls and the modified beads to prepare modified rubber strips, and mixing the modified rubber strips, cement and other substances together to prepare the concrete. The prepared concrete sample is good in high and low temperature resistance, excellent in flame retardance, high in hydrophobicity and not prone to breakage, has certain noise reduction and radiation protection capacity and has high practicability.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a high-temperature-resistant and crack-resistant concrete and a preparation method thereof. Background technique [0002] With the progress and development of nuclear industry technology, radioisotopes are more and more widely used in the medical field and scientific research in China. Medical equipment such as X-ray, CT and nuclear magnetic resonance will be widely used in the modern medical system. It is inevitable that part of the radiation will be leaked, and various electronic products widely used in our life will also bring some radiation problems to a greater or lesser extent. Crops exposed to α, β, γ and other ray radiation for a long time are prone to genetic mutations, which affect the natural growth of crops If human beings are exposed to such ray radiation conditions for a long time, it is easy to cause human stem cell lesions, causing cancer, leukemia and other dise...

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Problems solved by technology

[0002] With the progress and development of nuclear industry technology, radioisotopes are more and more widely used in the medical field and scientific research in China. Medical equipment such as X-ray, CT and nuclear magnetic resonance will be widely used in the modern medical system. It is inevitable that part of the radiation will be leaked, and various electronic products widely used in our life will also bring some radiation problems to a greater or lesser extent. Crops exposed to α, β, γ and other ray radiation for a long time are prone to genetic mutations, which affect the natural growth of crops If human beings are exposed to such ray radiation conditions for a long time, it is easy to cause human stem cell lesions, causing cancer, leukemia and other diseases; effectively shielding ray and protecting human health are issues we must pay attention to, but at present, the measures taken by our country to reduce radiation problems The main reason is to use large volume of concrete to block the rays. Too thick concrete walls will reduce the actual usable area of ​​the house, but too thin concrete walls will cause poor radiation protection. Therefore, in order to improve the radiation resistance of buildings, People add metal powder to concrete, but the mechanical properties of concrete are poor. After high and low temperature environments, cracks are easily generated. The infiltration of corrosive ions such as chloride ions will cause changes in the properties of the radiation-proof metal powder inside the concrete, and will also accelerate Corrosion of concrete walls; In addition, the current building concrete materials have poor thermal stability and poor flame retardancy. They are easy to decompose and support combustion after encountering an open flame, which has certain safety hazards

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