Surface film-covered ceramsite for light-weight aggregate concrete and preparation method for surface film-covered ceramsite

Abstract

The invention provides a surface film-covered ceramsite for light-weight aggregate concrete and a preparation method for the surface film-covered ceramsite, and belongs to the technical field of concrete preparation. The surface film-covered ceramsite for the light-weight aggregate concrete consists of a ceramsite and a silicon mortar film layer covering the surface of the ceramic particle. The silicon mortar film layer contains small solid particles which can block a multiporous structure on the surface of the ceramsite; furthermore, the surface of the ceramsite has hydroscopicity, and the silicon mortar film layer contains water, so that the silicon mortar film layer can be easily attached to the surface of the ceramsite under the surface tension; the adhering force between the silicon mortar film layer and the surface of the ceramsite is high; even in a concrete stirring process, the mortar film layer cannot fall off. When the surface film-covered ceramsite is used for the light-weight aggregate concrete, mixed water cannot be adsorbed any more, and the working performance of the light-weight aggregate concrete can be greatly improved; meanwhile, the contraction rate of concrete or a concrete product is also lowered.

Description

technical field [0001] The invention relates to surface-coated ceramsite for lightweight aggregate concrete and a preparation method thereof, belonging to the technical field of concrete. Background technique [0002] Lightweight aggregate concrete refers to the dry apparent density of not more than 1950kg / m3 prepared by light coarse aggregate, light fine aggregate (or ordinary sand), cementitious material and water. 3 of concrete. Among them, the lightweight aggregate concrete prepared with light fine aggregate as aggregate is full lightweight concrete; the lightweight aggregate concrete prepared with ordinary sand or part of light fine aggregate as fine aggregate is sand lightweight concrete. Lightweight aggregate concrete is widely used in various projects due to its light weight, high strength, heat preservation, heat insulation, earthquake resistance, wear resistance and other functional characteristics. [0003] The lightweight coarse aggregate commonly used in light...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that in the prior art, after covering the surface of the ceramsite with a hydrophobic shell, it will affect the compressive strength and stability of the concrete. Broken and falling off, the porous structure on the surface of the ceramsite cannot be effectively improved. In addition, the use of coconut oil and other chemical additives will increase the manufacturing cost of the ceramsite, and the process involves dipping and drying, which takes a long time and consumes a lot of energy. Large, affect work efficiency, and then provide a surface-coated ceramsite and ceramsite that can effectively improve the porous structure of the ceramsite surface without reducing the strength and stability of the concrete, and has low cost, simple manufacturing process, and is convenient for improving production efficiency. its preparation method