Low-alkalinity anti-crack mortar fiber reinforced foam cement heat-preserving plate

Abstract

The invention discloses a low-alkalinity anti-crack mortar fiber reinforced foam cement heat-preserving plate. The plate comprises a foam cement heat-preserving plate layer, alkali-resistant closed layers, a glass fiber mesh cloth layer and a low-alkalinity anti-crack mortar reinforced layer. The upper surface, the lower surface and the four side faces of the foam cement heat-preserving plate are coated with the alkali-resistant closed layers, and the glass fiber mesh cloth layer wraps and is attached to the upper surface, the lower surface and the four side faces of the foam cement heat-preserving plate coated with the alkali-resistant closed layers; the glass fiber mesh cloth layer is located between the alkali-resistant closed layers and the low-alkalinity anti-crack mortar reinforced layer; the upper surface, the lower surface and the periphery of the foam cement heat-preserving plate layer subjected to treatment of the alkali-resistant closed layers are coated with the low-alkalinity anti-crack mortar reinforced layer. The plate overcomes the defects that a traditional foam cement heat-preserving plate is large in fragility, prone to crack, high in water absorbing rate, severe in powder falling and the like. Meanwhile, flexibility of the plate is greatly improved, flexural strength is improved by 5-7 times, the plate in an ultra-large specification (> / =1200*1200 mm) can be manufactured, and the defects that corners of the plate in the ultra-large specification are prone to falling, and the plate is prone to damage or break are overcome.

Description

technical field [0001] The invention relates to a building thermal insulation material, in particular to a low-alkalinity anti-cracking mortar fiber reinforced foamed cement thermal insulation board. Background technique [0002] Foamed cement insulation board is a class A fireproof insulation material, which has the advantages of light weight, low thermal conductivity and good durability. and other shortcomings, based on this, the Chinese patent with publication number 203905187U proposes a fiber reinforced cement insulation board, which includes composite foam cement board, alkali-resistant glass fiber mesh cloth and polymer cement mortar reinforcement layer, said The upper and lower surfaces of the composite foamed cement insulation board are pasted with alkali-resistant glass fiber mesh cloth, and the polymer cement mortar reinforcement layer is painted on the upper and lower surfaces of the composite foamed cement insulation board and its four side. The thermal insula...

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Problems solved by technology

[0002] Foamed cement insulation board is a class A fireproof insulation material, which has the advantages of light weight, low thermal conductivity and good durability. and other shortcomings, based on this, the Chinese patent with publication number 203905187U proposes a fiber reinforced cement insulation board, which includes composite foam cement board, alkali-resistant glass fiber mesh cloth and polymer cement mortar reinforcement layer, said The upper and lower surfaces of the composite foamed cement insulation board are pasted with alkali-resistant glass fiber mesh cloth, and the polymer cement mortar reinforcement layer is painted on the upper and lower surfaces of the composite foamed cement insulation board and its four side

The thermal insulation board overcomes the shortcomings of the composite foamed cement thermal insulation board, such as high brittleness, easy cracking, high water absorption rate, and serious powder loss, etc., and has low water absorption rate (water absorption rate is less than 5%), excellent mechanical properties, low thermal conductivity, and good integrity. , not easy to crack, good durability, etc., but due to the high production cost of alkali-resistant glass fiber mesh cloth, high technical requirements, strict requirements for alkali-resistant coating materials, and high production costs, there are many medium-alkali, The situation of alkali-free glass fiber mesh pretending to be alkali-resistant glass fiber mesh

If the traditional cement mortar reinforcement layer is used, the medium-alkali and non-alkali glass fiber mesh cloth has been corroded by high-alkaline cement in the reinforcement layer for a long time, which reduces the tensile strength, and cracks and peeling of the reinforcement layer occur, which greatly affects the Plate life

[0003] In addition, most of the current manufacturers of foamed cement insulation boards can only produce foamed cement insulation boards of smaller sizes such as 300×300mm, 400×400mm or 300×600mm, which not only affects the construction efficiency, but also is not convenient for compounding into insulation decoration. Integrated board

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