Composition and method of using perlite

Abstract

The present invention relates to a powder adhesive composition comprising: (a) cement; (b) a dispersible polymer powder; and (c) at least 10% volume of the powder adhesive is an expanded perlite; wherein said cement is at a ratio of between 600-1000% of the mass of the expanded perlite; and wherein the powder adhesive composition is an adhesive, and the adhesion strength of the adhesive, is over 0.4 MPa, after 28 days, and after water immersion for at least 20 days.

1 . A sand-free powder adhesive composition comprising:
 cement;
 a dispersible polymer powder; and 
 expanded perlite, wherein at least 10% volume of the sand-free powder adhesive is expanded perlite; 
   characterized in that
 said cement is at a ratio of between 600-1000% of the mass of said expanded perlite. 
   
     
     
         2 . The composition according to  claim 1 , wherein said expanded perlite has a density of between 50-115 kg/m3, and a granular size of between 0-2 mm. 
     
     
         3 . The composition according to  claim 1 , wherein said dispersible polymer powder is at a ratio of between 5-300% of the mass of said expanded perlite. 
     
     
         4 . The composition according to  claim 1 , further comprising a cellulose ethers compound. 
     
     
         5 . The composition according to  claim 1 , further comprising a fiber compound. 
     
     
         6 . The composition according to  claim 1 , wherein the cement is white cement. 
     
     
         7 . The composition according to  claim 1 , wherein the cement is Portland cement. 
     
     
         8 . The composition according to  claim 1 , further comprising an accelerator. 
     
     
         9 . The composition according to  claim 5 , wherein the fiber compound is a polypropylene compound. 
     
     
         10 . The composition according to  claim 1 , wherein the perlite comprises at least 1% of the total mass of the adhesive composition.