High-alumina solid waste chloride ion curing agent as well as preparation method and application thereof

Abstract

The invention discloses a high-alumina solid waste chloride ion curing agent as well as a preparation method and application thereof. The chloride ion curing agent is prepared from the following components in parts by mass through a wet grinding process: 30-40 parts of high-alumina solid waste, 6-9 parts of a grinding aid, 2-3 parts of an organic alcamine ion dissolution promoter and 2-4 parts ofa surface modifier, with the balance being water, summing to 100 parts by mass, wherein the high-alumina solid waste is thermit-process vanadium slag. The thermit-process vanadium slag is used as a main raw material, and the grinding aid, the ion dissolution promoter and the surface modifier are added in the wet grinding process, so wet grinding efficiency is high, good fineness is achieved afterwet grinding, an aluminum phase in the vanadium slag is fully dissolved out in a wet grinding liquid phase environment, and the generation of the Kuzel's salt and the Friedel's salt in a cement-basedmaterial system is promoted; and thus, the chloride ion binding capacity of a matrix is substantially improved, and a chloride ion curing rate can be improved by 65% or more when the agent is used forreplacing cement in the cement-based material.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a high-aluminum solid waste chloride ion curing agent and its preparation method and application. Background technique [0002] Due to the increasing demand for construction sand and the limited river sand resources in our country, it is necessary to find alternative sand. my country is rich in sea sand resources. In recent years, the mining and application of sea sand have received great attention, but there are a series of problems in the use of sea sand. Undesalted sea sand is used as the main construction sand in reinforced concrete buildings. Free chloride ions in the sea sand will migrate to the surface of the steel bar to cause corrosion of the steel bar, which in turn causes damage to the building. [0003] The pH value of concrete is around 12.5, which is alkaline. Steel bars are prone to passivation reactions in alkaline environments, and a dense passivat...

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Problems solved by technology

The volume expansion of the steel bar after corrosion can easily lead to cracks in the concrete, and the damage of the structure is aggravated under the action of the external corrosive medium

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