Preparation method of nano-photocatalytic admixture for cement-based material

Abstract

The invention discloses a preparation method of nano-photocatalytic admixture for cement-based material, comprising the following steps: nanometer titanium dioxide mixed crystal is mixed with active carbon according to the weight ratio of 1:1-2 for 1-2 hours to obtain nano-photocatalytic material loaded with active carbon; then, the nano-photocatalytic material loaded with active carbon, dispersible emulsion powder, water reducer and polypropylene fiber are mixed according to the weight ratio of 1:0.2-0.3:0.04-0.06:0.004-0.006 for 1-2 hours. The invention has simple preparation technology, and prepared nano-photocatalytic admixture for cement-based material has long-term and stable photocatalytic function, and can improve flow property, adhesive property and anti-cracking property of concrete. The nano-photocatalytic admixture not only can be mixed with cement to obtain photocatalytic cement paste which is cement-based photocatalytic paint convenient to paint, but also can be mixed with cement and sand to prepare cement mortar to form cement-based photocatalytic coating with certain thickness on the concrete surface.

Description

technical field [0001] The invention relates to a preparation method of a nanometer photocatalytic admixture for cement-based materials. Background technique [0002] As one of the most commonly used engineering materials, cement-based materials are gradually developing in the direction of high performance and multifunctionality, such as thermal insulation, light weight and high strength. However, on the one hand, cement-based materials have good construction operation, mechanical properties and durability; on the other hand, they can photocatalytically oxidize pollutant gases in the atmosphere and have environmental protection functions. Existing nano-photocatalytic materials are easy to agglomerate and cannot be effectively dispersed in cement-based materials, and are easily wrapped by cement hydration products and lose good photocatalytic performance, and are also very detrimental to the flow properties and properties of cement-based materials. Development of mechanical ...

AI Technical Summary

Problems solved by technology

However, on the one hand, cement-based materials have good construction operation, mechanical properties and durability; on the other hand, they can photocatalytically oxidize pollutant gases in the atmosphere and have environmental protection functions. Existing nano-photocatalytic materials are easy to agglomerate and cannot be effectively dispersed in cement-based materials, and are easily wrapped by cement hydration products and lose good photocatalytic performance, and are also very detrimental to the flow properties and properties of cement-based materials. Development of mechanical properties