Inorganic composite heat insulation material and preparation method thereof

Abstract

The invention relates to an inorganic composite heat insulation material, which is prepared from the following raw materials in part by weight: 100 parts of common silicate cement, 10 to 30 parts of quick hardening sulfate aluminum cement, 10 to 30 parts of gypsum powder, 10 to 40 parts of admixture, 20 to 40 parts of mineral fiber, 150 to 200 parts of vitrified micro bubbles, 4 to 8 parts of re-dispersible latex powder, 2 to 4 parts of cellulose ether, 0.1 to 0.3 part of starch ether, 0.2 to 1.0 part of water reducing agent, 0.2 to 0.6 part of retarder, 1 to 3 parts of early strength agent, 0.5 to 3 parts of water repellent, and 0.02 to 0.06 part of air entraining agent. The raw materials are mixed uniformly to prepare dry powder, and the dry powder and water are mixed in a weight ratio of 1: (0.8-1.2) and stirred to form slurry for use. The inorganic composite heat insulation material has good workability, quick strength development, high construction efficiency, good adhesive property, low drying shrinkage, heat insulation, hydrophobic property, fire resistance and durability.

Description

technical field [0001] The invention relates to an inorganic composite thermal insulation material, which belongs to a building energy-saving material. Background technique [0002] At present, organic thermal insulation materials such as molded polystyrene plastic foam board, extruded polystyrene plastic foam board or hard foam polyurethane are usually used as thermal insulation materials for building energy conservation. The strength is low, the fire performance is poor, and the molten droplets and toxic smoke will be continuously produced during the combustion process, and the harmful gases such as chlorofluorocarbons, hydrofluorocarbons, and freons will be released at the same time. The cause of the CCTV fire a year ago was that fireworks ignited the building's external insulation material, and the fire spread throughout the building in an instant. For this reason, on September 25, 2009, the Ministry of Public Security and the Ministry of Housing and Urban-Rural Develop...

AI Technical Summary

Problems solved by technology

Expanded perlite has the disadvantages of high water absorption, large volume loss rate during stirring, lower thermal insulation performance and hollow cracking in the later stage; rock wool and glass wool have low compressive strength, which is harmful to the environment and personnel during production and use. There is a certain impact on health; the process of aerated concrete blocks is complex and the investment is large; foamed cement and foamed concrete are suitable for casting or making into boards and blocks, and cannot be applied for construction; the cost of phenolic foam and foam glass is too high. temporarily less

However, most of the existing inorganic composite materials use ordinary Portland cement as the cementitious material, which has a long setting time and low early strength, which affects the next process and prolongs the construction time. Moreover, the product has high water absorption and linearity. Shrink big

Sulphoaluminate cement is a good early-strength cement. When sulphoaluminate cement is used as the cementitious material to lose water too quickly, the surface is easy to pulverize, and the cost of raw materials is high.