High-strength alkali-resistant composite brick based on waste reutilization and preparation method of high-strength alkali-resistant composite brick

Abstract

The invention relates to the technical field of building materials, in particular to a high-strength alkali-resistant composite brick based on waste reutilization and a preparation method of the high-strength alkali-resistant composite brick. Electrolytic manganese residues and solid waste generated by house demolition are selected as main raw materials, and silicon-calcium resources in the electrolytic manganese residues and the solid waste are fully utilized; solid waste is subjected to grinding and grading treatment, electrolytic manganese residues are ground to expose siliceous components, then manganese residue powder and powder are used for preparing calcined aggregate, the manganese residue powder and fine particles are mixed to form a mixture, the manganese residue powder and coarse particles are ground to form mixed powder, and an additive is added as a gelatinizing agent, so that the consumption of the electrolytic manganese residues and the solid waste is increased; the silicon components in the electrolytic manganese residues interact with materials with different silicon and calcium components in the solid waste, and calcined aggregate, a mixture and a gelling agent are formed respectively. And through extrusion forming, drying maintenance and calcination maintenance, the compression resistance and breaking strength of the composite brick are improved, and the alkali corrosion resistance is enhanced.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-strength alkali-resistant composite brick based on waste recycling and a preparation method thereof. Background technique [0002] With the acceleration of urbanization and urbanization, the demolition of old cities and town houses has produced a large amount of solid waste, such as waste bricks, waste stones, waste concrete, etc. Compared with new concrete and bricks, etc. , the strength of these solid wastes is extremely low and the water absorption rate is high, so that when they are recycled and reused to prepare concrete and concrete bricks, the crushing index of concrete particles is greatly reduced, which greatly affects the concrete and concrete obtained from resource recycling. The comprehensive mechanical properties and anti-permeability of its products lead to low strength and poor alkali resistance of the resulting concrete products. Therefore, how t...

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Problems solved by technology

It can be seen that this technical document uses waste bricks and waste concrete demolished in cities and urbanization as raw materials, and after adding high molecular polymers, alkali-resistant glass fibers and other raw materials, the strength of the prepared materials can be improved quickly, and the strength of the prepared materials is relatively high within 7 days. High, comprehensive mechanical properties have been greatly improved technical solutions, but in this technical solution, it is necessary to use raw materials such as high molecular polymers that can quickly increase the strength and improve the gelation and coagulation performance between materials, resulting in high material preparation costs

[0005] Another example: Patent No. 201910800687.X discloses high-strength alkali-resistant bricks produced by using silica powder. Diameter ≤ 0.088mm waste electrical porcelain, particle size ≤ 0.088mm silica powder, particle size ≤ 0.088mm combined with clay, particle size ≤ 0.044mm kyanite powder, so that the compressive strength can reach more than 60MPa, and the bulk density can reach 2.2g / cm 3 , apparent porosity ≤ 19wt%, 0.2MPa load softening temperature ≥ 1380°C, thermal shock stability ≥ 10 (1100°C water cooling / time), still need to add silica powder as siliceous raw material to supplement silicon in the raw material composition, resulting in production cost higher

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