Composite lightweight thermal insulation material and preparation method thereof

Abstract

The invention discloses a lightweight thermal insulation material and a preparation method thereof. The thermal insulation material is prepared from the following raw materials by weight: 50-70 parts of portland cement, 30-50 parts of calcium carbonate, 3-10 parts of an organic polymer emulsion, 40-60 parts of water, 1-4 parts of a water repellent, 0.4-1.0 part of a foam stabilizing agent, 0.2-0.8 part of a water reducing agent, 1-3 parts of a reinforcing agent and 5-10 parts of a foaming agent; and the organic polymer emulsion is an EVA polymer emulsion. According to the invention, the organic polymer emulsion is added, while water repellent, reinforcing agent, water reducing agent and foam stabilizing agent are introduced, and the process conditions of temperature, stirring speed and stirring time are controlled, so that the prepared composite light thermal insulation material not only has excellent flame retardant properties, but also has the advantages of pore dimension uniform temperature, high strength, low water absorption and good stability. The material prepared by the invention is a green environment-friendly material, which can be recycled completely, and the preparation method has the advantages of simple operation, low carbon, energy saving, no pollution and easiness for mass production.

Description

technical field [0001] The invention relates to a building decoration material, in particular to an organic-inorganic composite foamed cement material for external wall heat preservation and a preparation process thereof. Background technique [0002] Energy saving and emission reduction is a basic national policy of our country, and building energy-saving external wall insulation has been listed as a mandatory standard. At present, organic insulation boards such as polystyrene boards and extruded boards are mainly used in external wall insulation, although the bulk density is lower than 250Kg / cm 3 , The thermal conductivity is below 0.05w / (k.m), but in recent years, organic thermal insulation materials have caused many fires, especially the fire in the new building of CCTV, the fire in the teachers’ apartment in Shanghai Jing’an Temple and other high-rise buildings. Non-compliance is the main reason. Gongtongzi [2009] No. 46 "Interim Provisions on Fire Protection of Civil...

AI Technical Summary

Problems solved by technology

Patent CN201110050706.5 proposes a method of physical foaming, supplemented by hydrogen peroxide chemical foaming, but the operation is difficult, it is easy to cause the loss of bubbles, and the production cost is high

Patent CN102850081 A introduces a foamed cement board containing industrial solid waste, but its preparation process is complicated, the foaming time needs 10-12 hours, and it needs to be steam-cured in a steam-curing room at 70-75°C for 1-2 hours. Hours, high production costs, unable to mass-produce

In addition, the existing foamed cement insulation boards in the market still have certain quality problems, such as: low compressive strength, poor waterproof effect, high water absorption, etc.