Process for the stabilization of dusting surfaces

Abstract

The invention relates to a process for the stabilization of dusting surfaces characterized in that the dusty ground is tilled or scarified and mixed with polymers in form of water-redispersible polymer powders, which are optionally re-emulsifiably modified, or reemulsifiable modified aqueous polymer dispersions, which are optionally sprayed on to the untreated dusty ground. In a preferred embodiment the redispersible polymer powder, respectively the reemulsifiable modified redispersible polymer powder or the reemulsifiable modified aqueous polymer dispersion, is combined with hydraulically setting compounds, preferably cement and/or gypsum.

1 . A process for stabilizing a soil surface, comprising treating soil by means of at least one of 
 a. admixing with soil a water-redispersible polymer powder or reemulsifiable-modified redispersible polymer powder to form a soil/polymer mixture and wetting said soil/polymer mixture to form a polymer-bound soil; or    b. applying to soil an aqueous dispersion of at least one of a water-redispersible polymer powder or a reemulsifiable-modified redispersible polymer powder,    and optionally compacting the soil thus treated, with the proviso that the soil surface is free of water-impermeable polymer film such that the soil is rewettable with water.    
   
   
       2 . The process of  claim 1 , wherein the soil surface is free of any water-impermeable polymer film.  
   
   
       3 . The process of  claim 1 , wherein the soil is sand and an aqueous dispersion of a water-redispersible polymer powder or remulsifiable-modified redispersible polymer powder is applied to the soil.  
   
   
       4 . The process of  claim 1 , wherein a water-redispersible polymer powder or a reemulsifiable-modified redispersible polymer powder is admixed with soil, and said wetting is accomplished by applying an aqueous dispersion of a water-redisperesible polymer powder and/or a reemulsifiable-modified redispersible polymer powder.  
   
   
       5 . The process of  claim 1 , wherein a composition comprising a water-redispersible polymer powder and a hydraulically settable cement is admixed with soil and wetted.  
   
   
       6 . The process of  claim 1 , wherein a composition comprising a reemulsifiable-modified redispersible polymer powder and a hydraulically settable cement is admixed with soil and wetted.  
   
   
       7 . The process of  claim 1  wherein said water-redispersible polymer is a polymer prepared by copolymerizing a monomer mixture comprising at least one monomer selected from the group consisting of vinyl esters, (meth)acrylates, vinyl aromatics, olefins, 1,3-dienes, and vinyl halides, in the presence of a protective colloid.  
   
   
       8 . The process of  claim 1 , wherein said water-redispersible polymer is a polymer prepared by copolymerizing a monomer mixture comprising vinyl acetate and ethylene in the presence of a protective colloid.  
   
   
       9 . The process of  claim 1  wherein said water-redispersible polymer is a polymer prepared by copolymerizing a monomer mixture comprising at least one vinyl ester and an olefin, in the presence of a protective colloid, and wherein a dispersant is added to the water-redispersible polymer prior to adding said water-redisperesible polymer to the soil, or is added to the soil with the water-redispersible polymer, prior to compaction of the soil.  
   
   
       10 . The process of  claim 1 , wherein said water-redispersible polymer is a polymer prepared by copolymerizing a monomer mixture comprising vinyl acetate and ethylene in the presence of a protective colloid, and wherein a dispersant is added to the water-redispersible polymer prior to adding said water-redisperesible polymer to the soil, or is added to the soil with the water-redispersible polymer, prior to compaction of the soil.  
   
   
       11 . The process of  claim 1 , wherein the soil is compacted in a moist state.  
   
   
       12 . The process of  claim 2 , wherein the soil is compacted in a moist state.  
   
   
       13 . A process for restabilizing stablized soil prepared by the process of  claim 1 , comprising rewetting the soil.  
   
   
       14 . The process of  claim 13 , wherein the soil is tilled or scarified prior to, during, or following rewetting, and is subsequently compacted.  
   
   
       15 . A stabilized soil, prepared by the process of  claim 1 , having a hard surface permeable to water.  
   
   
       16 . A stabilized soil, prepared by the process of  claim 2 , having a hard surface permeable to water.  
   
   
       17 . A stabilized soil, prepared by the process of  claim 3 , having a hard surface permeable to water.  
   
   
       18 . A stabilized soil, prepared by the process of  claim 4 , having a hard surface permeable to water.  
   
   
       19 . A stabilized soil, prepared by the process of  claim 5 , having a hard surface permeable to water vapor.  
   
   
       20 . A stabilized soil, prepared by the process of  claim 6 , having a hard surface permeable to water vapor.