Preparation method of modified common silicate cement based foam insulating plate and special assistant

Abstract

The invention discloses a special auxiliary agent for the preparation of a modified ordinary portland cement-based foam insulation board, which is prepared by using the following material proportions in parts by mass: 10-20 parts of industrial calcium stearate; 5 parts of illite or kaolin ~10 parts; 0.5~5 parts of water-soluble polymer sodium carboxymethyl cellulose; 15~25 parts of calcium nitrate; 5~20 parts of building gypsum; 15~25 parts of sodium chloride or calcium chloride; 15~25 parts of lithium carbonate 25 parts; 0.5~5 parts of triethanolamine; 5~10 parts of quicklime; 1~5 parts of shrinkage reducer. The invention also discloses a method for preparing a modified ordinary Portland cement-based foam insulation board, which uses the above-mentioned additives, and is combined with ordinary Portland cement, fly ash, silica fume, polypropylene fiber and high-efficiency water-reducing preparations etc. The invention solves the problems of easy mold collapse, uneven air bubble distribution, high defective rate, high water absorption rate and low strength of the prepared product when producing ordinary portland cement or portland cement foam insulation board.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing a foamed cement insulation board by using ordinary Portland cement or Portland cement and a special modification additive thereof. Background technique [0002] For a long time, organic insulation materials such as polystyrene foam (EPS, XPS) and polyurethane rigid foam (PU) have been widely used in my country's construction market. Poor performance, fire accidents have occurred frequently in thermal insulation construction projects in various places. EPS will melt quickly in the event of fire, with large smoke and high toxicity, which is difficult to fight and serious harm. For Pu, in addition to fire prevention and price issues, there are also defects such as being sensitive to climate during construction, wind blowing affects spraying, humidity affects bonding, large shrinkage, and poisonous gas emission during spraying. Moreover, these organic foam mat...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is how to provide a special auxiliary agent for the preparation of modified ordinary Portland cement-based foam insulation board, and at the same time provide a modified ordinary Portland cement-based foam insulation board based on the auxiliary agent. The board preparation method solves the problem of easy mold collapse, different bubble sizes, uneven distribution, high defective rate, high water absorption rate and low strength when producing ordinary Portland cement or Portland cement foam insulation board. And other issues