Inorganic heat-insulation board and preparation method thereof

Abstract

The invention discloses an inorganic heat-insulation board and a preparation method thereof. The inorganic heat-insulation board is prepared from the following component raw materials: 30-75% of Portland cement, 10-20% of fly ash, 0-15% of hemihydrate gypsum, 0-15 of gypsum, 0-15% of ash calcium, 0-15% of silica fume, 0.1-5% of expanded graphite, 0.1-5% of toughening agent, 0.1-1% of early strength agent, 0.1-0.5% of water reducing agent and 0.1-0.5% of waterproof agent. The invention also discloses the preparation method of the inorganic heat-insulation board. The preparation method comprises the steps: sufficiently mixing Portland cement, fly ash, hemihydrate gypsum, gypsum, ash calcium and silica fume to obtain a mixed system, adding expanded graphite, toughening agent, early strength agent, water reducing agent and waterproof agent to the mixed system, and carrying out chemical foaming in hot water of 90 DEG C to obtain a product. The inorganic heat-insulation board is a heat-insulation board of which a body contains more than 90% of bubbles, takes multiple inorganic adhesive materials as main components and organic adhesive materials for toughening, and has heat conduction coefficient of 0.045-0.050 W / (m.k).

Description

technical field [0001] The invention relates to an inorganic thermal insulation board, which belongs to the technical field of chemical materials, in particular to an inorganic thermal insulation board and a preparation method thereof. Background technique [0002] Existing thermal insulation boards include inorganic thermal insulation boards and organic thermal insulation boards. Polystyrene foam boards, polyurethane boards, phenolic resin boards, aluminum silicate boards and cement fly ash foam boards are widely used, among which inorganic foam boards are The foaming effect is better, and the cost is lower than that of the organic foam board. The most widely used is the cement fly ash foam board, which has a good foaming effect, but in building materials, the utilization rate of materials with good comprehensive performance is higher . [0003] The existing cement fly ash foam board has certain disadvantages. (1) The comprehensive performance is not good. For the existing...

AI Technical Summary

Problems solved by technology

[0002] Existing thermal insulation boards include inorganic thermal insulation boards and organic thermal insulation boards. Polystyrene foam boards, polyurethane boards, phenolic resin boards, aluminum silicate boards and cement fly ash foam boards are widely used, among which inorganic foam boards are The foaming effect is better, and the cost is lower than that of the organic foam board. The most widely used is the cement fly ash foam board, which has a good foaming effect, but in building materials, the utilization rate of materials with good comprehensive performance is higher

[0003] The existing cement fly ash foam board has certain disadvantages. (1) The comprehensive performance is not good. For the existing external wall insulation system, the comprehensive performance such as anti-radiation, heat insulation and waterproof needs to be improved; (2) Thermal conductivity Higher, the average thermal conductivity of existing inorganic insulation boards is higher; (3) The weight is relatively large, and the existing cement fly ash foam boards are easy to fall off due to the high cost of cement