A method for manufacturing a high-strength and light-weight integral hydrophobic xonotlite thermal insulation and fireproof board

Abstract

The invention discloses a making method of a high-strength light-weight integral-hydrophobic xonotlite fireproof insulation board, comprising the following steps of: (1) mixing silicon raw materials and calcium raw materials according to a Ca / Si mole ratio of 0.9-1.1, then, injecting the mixed raw materials into a dynamic reaction kettle, synthesizing by using superheated steam of 250-400 DEG C at the steam pressure of 2.0-2.7MPa for 3-8hours to obtain xonotlite slurry, and adding reinforced fibers; (2) removing redundant water in the xonotlite slurry obtained in the step (1) and adding 0.1-8% of inorganic glue (according to the weight ratio of the slurry to the inorganic glue); (3) adding 0.1-8% of reaction type organic silicon waterproof agent in the xonotlite slurry obtained in the step (2) to enable the reaction type organic silicon waterproof agent and the slurry to form interface combination; and (4) carrying out compression molding on the xonotlite slurry prepared in the step (3), and drying to obtain the material-uniform high-strength light-weight complete-hydrophobic xonotlite board. The fireproof insulation board produced by the invention has the characteristics of high strength, uniform material, no bubble hole, light weight and complete hydrophobicity.

Description

technical field [0001] The invention relates to a production method of a high-strength and light-weight integral hydrophobic xonotlite thermal insulation and fireproof board, which is mainly used for thermal insulation and fireproofing of building exterior walls, steel structure insulation and fireproofing, fireproof door core boards and flue air ducts in construction projects. Background technique [0002] The traditional dynamic synthesis method for producing xonotlite is to synthesize in saturated steam at a temperature of 180°C to 210°C and a pressure of 1.8 to 2.2MPa, and the Ca / Si ratio (molar ratio) of the slurry is 0.9 to 1.1. Due to the influence of raw materials and the activity of calcareous raw materials, it is difficult to fully form xonotlite, and even if it forms its developed crystals, it is not sufficient. [0003] Before this invention, in order to make the calcium silicate molded body stronger and more flexible, there was an invention of adding a polymer d...

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Problems solved by technology

[0002] The traditional dynamic synthesis method for producing xonotlite is to synthesize in saturated steam at a temperature of 180°C to 210°C and a pressure of 1.8 to 2.2MPa, and the Ca / Si ratio (molar ratio) of the slurry is 0.9 to 1.1. Influenced by the activity of raw materials and calcareous raw materials, it is difficult to fully form xonotlite, even if it forms its developed crystals, it is not sufficient

[0003] Before this invention, in order to make the calcium silicate molded body stronger and more flexible, there was an invention of adding a polymer dispersant in the Japanese patent to make xonotlite artificial wood, but the Japanese patent invention is to add organic cement The material will cause a decrease in fireproof performance, and at the same time, its strength after high temperature is too different from that at normal temperature; organic glue will lose its effect after high temperature

[0004] To make the xonotlite sheet hydrophobic, the traditional production method is to paint the surface of the molded body, but the surface is hydrophobic, and its durability is poor

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