Building boards and method for manufacturing the same

Abstract

Building boards and method for manufacturing the same are provided. The building board comprises a cement layer ( 102 ) and a magnesium oxide layer ( 104 ). The method for manufacturing the building board comprises the steps of providing a cement board and a magnesium oxide board, dehydrating and binding the cement board and the magnesium oxide board. The performance of moisture proofing, fungus proofing, erode proofing, fireproof and others can be improved by utilizing the building boards.

1 - 36 . (canceled) 
     
     
         37 . A laminate flooring building board comprising:
 a cement board as a top layer; and   a magnesium oxide board as a lower layer, wherein the cement board and magnesium oxide board are bound to one another with a glue, wherein each side of the laminate flooring building board has at least one of a tongue and groove, and wherein the surface of the laminate flooring building board is covered with a protective coating of oil which permeates into the surface of the laminate flooring building board and mixes with cement of the cement board.   
     
     
         38 . The laminate flooring building board of  claim 37 , wherein the top layer cement board comprises cement and glass fiber. 
     
     
         39 . The laminate flooring building board of  claim 37 , wherein the top layer cement board has a thickness from 2 to 20 millimeters, wherein the lower layer magnesium oxide board has a thickness from 8 to 15 millimeters, and wherein the cement board has a density from 1.1 to 1.8 g/cm 3 . 
     
     
         40 . The laminate flooring building board of  claim 37 , further comprising a buffer layer, wherein the buffer layer is connected to the magnesium oxide board, and wherein the buffer layer preferably comprises at least one of rubber and plastic. 
     
     
         41 . The laminate flooring building board of  claim 37 , wherein the laminate flooring building board is shaped as one of a square, a rectangle, a parallelogram, a hexagon and an octagon. 
     
     
         42 . A method for manufacturing a laminate flooring building board, the method comprising:
 dehydrating a cement board and a magnesium oxide board;   binding the cement board to the magnesium oxide board with a glue, wherein the cement board is a top layer and the magnesium oxide board is a lower layer, providing each side of the laminate flooring building board with at least one of a tongue and a groove; and   covering the surface of the laminate flooring building board with a protective coating of oil, wherein the oil permeates into the surface of the laminate flooring building board and mixes with the top layer cement board.   
     
     
         43 . The method of  claim 42 , wherein the dehydrating step further comprises dehydrating water in the cement board and the magnesium oxide board to 10-15% by mass. 
     
     
         44 . The method of  claim 42 , wherein the binding step further comprises binding the cement board to the magnesium oxide board by cold pressing, and wherein a process time of the cold pressing is 6 to 10 hours, and a pressure of the cold pressing is 5 kg/cm 2 . 
     
     
         45 . The method of  claim 42 , wherein the cement board and the magnesium oxide board are bound with water boiled proof (WBP) glue. 
     
     
         46 . The method of  claim 42 , further comprising binding a buffer material to the magnesium oxide board, wherein the buffer material comprises at least one of rubber and plastic.