Soil stabilization system

Abstract

A construction article including a compacted mixture that includes soil and a crop plant biomass microorganism-expressed enzyme composition. A method of stabilizing soil including: (i) mixing together soil, water and a crop plant biomass microorganism-expressed enzyme composition to form a mixture; (ii) causing the mixture to be shaped into a selected structure; and (iii) causing the structure to be compacted.

1 . A construction article comprising a compacted mixture including soil and a crop plant biomass microorganism-expressed enzyme composition. 
     
     
         2 . The construction article of  claim 1 , in which the enzyme composition includes a ureolytic enzyme. 
     
     
         3 . The construction article of  claim 2 , in which the enzyme composition includes an active ureolytic enzyme. 
     
     
         4 . The construction article of  claim 1 , in which the mixture includes a nitrate ion source. 
     
     
         5 . The construction article of  claim 1 , in which the mixture has a pH within a range of between about 7 and about 8. 
     
     
         6 . The construction article of  claim 1 , in which the enzyme composition is biodegradable. 
     
     
         7 . The construction article of  claim 1 , in which the enzyme composition is edible. 
     
     
         8 . The construction article of  claim 1 , in which the soil includes cohesive colloidal fines passing a 200 mesh screen at a concentration within a range of between about 8% by weight and about 30% by weight of the soil. 
     
     
         9 . The construction article of  claim 1 , in which the mixture includes less than about 10% by weight of cellulosic material. 
     
     
         10 . The construction article of  claim 1 , in which the article is selected from a group consisting of a brick, block, board, tile, and paver. 
     
     
         11 . A method of stabilizing soil, comprising:
 mixing together soil, water and a crop plant biomass microorganism-expressed enzyme composition to form a mixture;   causing the mixture to be shaped into a selected structure; and   causing the structure to be compacted.   
     
     
         12 . The method of  claim 11 , including mixing together soil, water and a crop plant biomass microorganism-expressed enzyme composition that includes a ureolytic enzyme. 
     
     
         13 . The method of  claim 12 , including mixing together soil, water and a crop plant biomass microorganism-expressed enzyme composition that includes an active ureolytic enzyme. 
     
     
         14 . The method of  claim 11 , including mixing together soil, water and a crop plant biomass microorganism-expressed enzyme composition that includes an enzyme expressed by a ureolytic microorganism. 
     
     
         15 . The method of  claim 11 , including mixing together soil, water, a crop plant biomass microorganism-expressed enzyme composition, and a nitrate ion source. 
     
     
         16 . The method of  claim 11 , including mixing together soil, water and a crop plant biomass microorganism-expressed enzyme composition that has a pH within a range of between about 7 and about 8. 
     
     
         17 . The method of  claim 11 , including mixing together soil, water and a biodegradable crop plant biomass microorganism-expressed enzyme composition. 
     
     
         18 . The method of  claim 11 , including mixing together soil, water and an edible crop plant biomass microorganism-expressed enzyme composition. 
     
     
         19 . The method of  claim 11 , including selecting soil including cohesive colloidal fines passing a 200 mesh screen at a concentration within a range of between about 8% by weight and about 30% by weight of the soil. 
     
     
         20 . The method of  claim 11 , including selecting such a mixture including less than about 10% by weight of cellulosic material. 
     
     
         21 . The method of  claim 11 , including selecting such a mixture including a water concentration within a range of between about 15% by weight and about 20% by weight of the mixture. 
     
     
         22 . The method of  claim 11 , in which causing such a mixture to be shaped into a selected structure includes forming at least one lift having a thickness within a range of between about 2 inches and about 6 inches. 
     
     
         23 . The method of  claim 11 , in which causing such a mixture to be shaped into a selected structure includes forming the selected structure over a subsurface moistened by a solution including the crop plant biomass microorganism-expressed enzyme composition. 
     
     
         24 . The method of  claim 11 , including dispersing a crop plant biomass microorganism-expressed enzyme composition in a water body confined by a soil subsurface, allowing the composition in the water body to form such a mixture on the soil subsurface, and allowing the water body to compact the mixture on the soil subsurface. 
     
     
         25 . The method of  claim 11 , in which causing such a mixture to be shaped into a selected structure includes forming an article selected from a group consisting of a brick, block, board, tile, and paver.