Titanium gypsum high-performance concrete building material and preparation method therefor

Abstract

The invention discloses a titanium gypsum high-performance concrete building material and a preparation method therefor. The titanium gypsum high-performance concrete building material comprises cementing material slurry S1 and aggregates S2, wherein the aggregates S2 are one or a combination of a random ratio of two of light aggregates and normal aggregates, and the ratio of volume of the cementing material slurry S1 to stacked volume of the aggregates S2 is (1: 1) to (1: 3). An acidic excitant is adopted in a titanium gypsum based cementing material system, so that an induction period of reaction is shortened, and the early strength is improved; during batching, a method that other powder ingredients are premixed firstly except for wet titanium gypsum slag is adopted, so that original-condition titanium gypsum slag can be directly adopted in case of relatively high moisture content; the speed of uniform stirring of slurry powder is accelerated, so that a dehydration link for the titanium gypsum slag is avoided, and the stirring rate is increased; and a vacuumizing mode is adopted during slurry powder stirring, so that the mechanical strength, softening coefficient and durability of the titanium gypsum based building material prepared by the preparation method are further improved.

Description

technical field [0001] The invention relates to a titanium gypsum high-performance concrete building material and a preparation method thereof, belonging to the technical field of gypsum-based cementitious materials. Background technique [0002] Titanium dioxide production enterprises adopt the method of lime neutralization reaction in the process of processing a large amount of waste liquid containing sulfuric acid, so a large amount of industrial waste residue containing calcium sulfate dihydrate, that is, titanium gypsum slag, will be produced. Every ton of titanium dioxide produced requires 1.5-2 tons of titanium gypsum slag is discharged. Its chemical composition and physical properties are similar to natural gypsum, but because it contains certain impurities and has a large amount of attached water, it is easy to agglomerate after drying and dehydration, which brings great difficulty to its comprehensive utilization. At present, the utilization rate of titanium gypsum...

AI Technical Summary

Problems solved by technology

However, this method does not take into account the impact of the by-product gypsum particle aggregation state and moisture content on subsequent processing and product performance, especially titanium gypsum slag, which contains high moisture content and excessive flocculant in addition to PAM and other ingredients, especially the latter two, make the undisturbed titanium gypsum slag: 1) The viscosity of the mud is very large, and it is difficult for other powders to disperse evenly in it; 2) A large number of air bubbles are introduced during the stirring, making the finished product 3) The strength of the particles after drying is extremely high, and it is necessary to increase the crushing process, which increases the processing cost