Process for the manufacture of construction materials from cellulosic residues

Abstract

The present invention is related with a process for the production of a great variety of building materials from the paper waste, that consumes a high quantity of this industrial waste, which implies a decrease in the deposit of these polluting wastes and therefore, the decrease of the adverse effects that such wastes cause on the environment.

1 . Process to manufacture building materials from “paper sludge•, comprising the stages of:
 a. homogenization, 
 b. pressing at a pressure between 0.98 MPa and 6.86 MPa, 
 c. Drying at a temperature bellow 110° C. with moisture control between 30 and 80%, and 
 d. waterproofing. 
 
     
     
         2 . The process according to  claim 1  wherein the homogenization stage of the “paper sludge” comprises reducing it to particles with a size between 0.1 mm and 20 mm. 
     
     
         3 . The process according to  claim 1  wherein the pressure exerted on the material during pressing stage b) is between 1.41 MPa y 6.86 MPa. 
     
     
         4 . The process according to  claim 3  wherein the pressure exerted on the material during pressing stage b) is between 1.41 MPa y 6.86 MPa. 
     
     
         5 . The process according to  claim 1  wherein the drying temperature is from 42° C. to 90° C. and the relative humidity is between 30 and 60%. 
     
     
         6 . The process according to  claim 1  wherein the temperature of the place where the process is done is below 14° C., the drying stage will be done in ovens or equipments for heating and dehumidify the air in the chamber. 
     
     
         7 . The process according to  claim 1  wherein the waterproofing of the material is done by dipping or spraying. 
     
     
         8 . The process according to  claim 1  wherein for the waterproofing its used a waterproofing agent, it can be an aqueous emulsion sealant or primer or a composition of polyhydroxyls or any compound to reduce the water penetration into the material. 
     
     
         9 . Material produced through the process according to  claim 1 .