Lightweight aggregate concrete and preparation method thereof

Abstract

The invention relates to the field of building materials, and particularly discloses lightweight aggregate concrete and a preparation method thereof. The lightweight aggregate concrete is prepared from the following raw materials in parts by weight: cement, an admixture, machine-made sand, stone powder, surface modified ceramsite, fine stone, polytetrafluoroethylene fibers, water and a water reducing agent, the surface modified ceramsite is obtained by performing surface modification on ceramsite through fireproof resin and potassium perfluorobutanesulfonate; the preparation method comprises the following steps: mixing and stirring the cement, the admixture, the machine-made sand, the stone powder and the fine stone to obtain a solid mixture; adding the rest raw materials except the surface modified ceramsite and the polytetrafluoroethylene fiber into the solid mixture, and stirring to obtain concrete slurry; and adding the surface modified ceramsite and polytetrafluoroethylene fiber into the concrete slurry, and stirring to obtain the concrete. According to the lightweight aggregate concrete disclosed by the invention, the high-temperature resistance of the concrete is improved; according to the preparation method, the possibility that an organic film on the surface of the surface modified ceramsite is abraded is reduced.

Description

technical field [0001] The application relates to the field of building materials, more specifically, it relates to a lightweight aggregate concrete and a preparation method thereof. Background technique [0002] River sand is a kind of non-metallic ore with high impurity content, which is produced by repeated collision and friction of natural stone under the force of water for a long time. . But at present, mineral resources are lacking, so the purchase of river sand is restricted. [0003] In order to maintain the normal production of concrete, the stone powder obtained by crushing the waste rock in the quarry is used to replace part of the river sand as the raw material for the preparation of concrete. In this way, the use of stone powder can not only maintain the normal production of concrete, but also meet the purpose of saving resources and reducing environmental pollution . [0004] At present, the fire problem of building structures is becoming more and more promi...

AI Technical Summary

Problems solved by technology

[0004] At present, the fire problem of building structures is becoming more and more prominent. Concrete is the most used building material in construction, and its high temperature resistance plays an important role in the fire prevention of buildings. However, the high temperature resistance of concrete made of stone powder needs to be improved.

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