Magnesium oxysulfate cement board and method for preparing same by using semidry method

Abstract

The invention relates to a magnesium oxysulfate cement board and a method for preparing the same by using a semidry method. The magnesium oxysulfate cement board comprises a heat insulation core layer and strength structure layers respectively compounded on the two surfaces of the heat insulation core layer. The heat insulation core layer is a layer structure formed by stirring and pressing magnesium oxysulfate which is used as a gelatinizing agent and a light material which is used as a filler. Each strength structure layer is a layer structure formed by the magnesium oxysulfate which is used as the gelatinizing agent. The magnesium oxysulfate cement board disclosed by the invention has the outstanding substantive characteristics that a plate material with a multilayer composite structure is formed by mixing the magnesium oxysulfate utilized as the gelatinizing agent with the light material and / or a reinforcing fiber; the structure of the core layer has the characteristics of light weight and good heat preservation and heat insulation effects; the strength structure layers on the two surfaces of the core layer have the characteristics of bending resistance and high compression strength; and meanwhile, the magnesium oxysulfate cement board is low in PH value and has no chlorine content. Therefore, the occurrence of the moisture absorption and the halogenation are avoided; the corrosion on materials, such as plant fibers, metal pieces and the like, is avoided; and the application range is widened and the service life is prolonged.

Description

technical field [0001] The invention relates to a magnesium oxysulfide cement board and a semi-dry preparation method thereof. Background technique [0002] There are many boards produced with inorganic cementitious materials. For example, TK board, FC board, and Eternit board are produced by Portland cement; paper-faced gypsum board, gypsum ceiling, and gypsum wallboard are produced by gypsum; glass magnesium slabs are produced by magnesium oxychloride cement. , Lightweight partition board. [0003] Analysis from the aspect of plate making materials: [0004] Portland cement board has the disadvantages of high density and high PH value, and it has serious corrosion to glass fiber, and xylitol will be produced when it contacts with plant fiber, which will affect the bonding strength of cement. Therefore, vinylon short fiber is used as a reinforcing material, but vinylon also has disadvantages: the fire resistance is not good enough, and ultimately affects the overall perf...

AI Technical Summary

Problems solved by technology

[0004] Portland cement board has the disadvantages of high density and high PH value, which has serious corrosion to glass fiber, and xylitol will be produced in contact with plant fiber, which will affect the bonding strength of cement

Therefore, vinylon short fiber is used as a reinforcing material, but vinylon also has disadvantages: the fire resistance is not good enough, and ultimately affects the overall performance of Portland cement board

[0008] At present, the boards produced by inorganic materials in the market are of homogeneous structure, and the board surface is consistent with the intermediate structure, and the strength can only be obtained by increasing the thickness, resulting in a relatively large weight of the board, which brings difficulties to handling and increases the weight of the building.

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