Alkali-activated slag powder geopolymer mortar for structure reinforcement and preparation method thereof

Abstract

The invention discloses alkali-activated slag powder geopolymer mortar for structure reinforcement and a preparation method thereof. The alkali-activated slag powder geopolymer mortar for structure reinforcement is prepared from, by weight, 150-210 parts of slag powder, 0-60 parts of fly ash, 400-700 parts of sand, 190-240 parts of water glass and 25-50 parts of solid sodium hydroxide. The preparation method comprises the following steps that the slag powder, the fly ash and the sand are mixed to be uniform according to the proportions; solid sodium hydroxide particles are dissolved in the corresponding amount of the water glass according to the proportion; sodium hydroxide-dissolved water glass is added into well-mixed dry materials, and stirring is conducted continuously to be uniform; the well-stirred alkali-activated slag powder geopolymer mortar is used for building structure reinforcement; the alkali-activated slag powder geopolymer mortar has high compressive strength, good adhesive property with concrete and fiber cloth materials and a wide fluidity range and can adapt to the situation of reinforcing building structures through a fiber cloth bonding method or a grouting pouring method.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an alkali-activated slag powder polymer mortar for structural reinforcement and a preparation method thereof. Background technique [0002] The technology of reinforcing building structures by sticking fiber cloth or steel to building structures with adhesives has been widely used. At present, the commonly used adhesives are organic materials, and their poor durability and high temperature resistance limit their development, and may bury safety hazards for the reinforced structure. The service life of organic adhesives is generally 15 years, but the service life of buildings is usually 50 years. There are no relevant regulations on how to evaluate the structural safety after the life of organic adhesives. The glass transition temperature of organic adhesives is often around 60°C, and the surface temperature of the structure may reach or approach this temperature in some direct ...

AI Technical Summary

Problems solved by technology

At present, the commonly used adhesives are organic materials, and their poor durability and high temperature resistance limit their development, and may bury safety hazards for the reinforced structure.

The service life of organic adhesives is generally 15 years, but the service life of buildings is usually 50 years. There are no relevant regulations on how to evaluate the structural safety after the life of organic adhesives