The present invention relates to improved bentonite barrier compositions having enhanced low permeability over time in containment applications. Of the many embodiments provided herein, one embodiment includes a method comprising: providing a bentonite barrier composition comprising: bentonite; and a polyanionic low molecular weight polymer; and forming a containment using the bentonite barrier composition to provide at least partial separation for a containment from its environment.

The present invention relates to improved bentonite barrier compositions having enhanced low permeability over time in containment applications. Of the many embodiments provided herein, one embodiment includes a method comprising: providing a bentonite barrier composition comprising: bentonite; and a polyanionic low molecular weight polymer; and forming a containment using the bentonite barrier composition to provide at least partial separation for a containment from its environment.

The present disclosure provides efficient and cost-effective methods for producing synthetic soil and synthetic stone from waste, including inorganic waste and organic waste, through a hydrolysis-polycondensation process.

The present disclosure provides efficient and cost-effective methods for producing synthetic soil and synthetic stone from waste, including inorganic waste and organic waste, through a hydrolysis-polycondensation process.

The invention provides a method of containing PFAS within a low permeability cementitious product, the method comprising: forming a cementitious slurry, the cementitious slurry comprising: cement; water; aggregate; and allowing the cementitious slurry to cure and thereby form a cementitious product; wherein one or more of the water and the aggregate is contaminated with PFAS; and further wherein the method comprises adding one or more of: siliceous pozzolans; plasticizer(s); and crystalline growth water-proofing compound(s), in an amount sufficient to produce a cementitious product comprising low water permeability, the low water permeability substantially preventing leaching of PFAS.

The invention provides a method of containing PFAS within a low permeability cementitious product, the method comprising: forming a cementitious slurry, the cementitious slurry comprising: cement; water; aggregate; and allowing the cementitious slurry to cure and thereby form a cementitious product; wherein one or more of the water and the aggregate is contaminated with PFAS; and further wherein the method comprises adding one or more of: siliceous pozzolans; plasticizer(s); and crystalline growth water-proofing compound(s), in an amount sufficient to produce a cementitious product comprising low water permeability, the low water permeability substantially preventing leaching of PFAS.

An additive for producing a hardenable building material, especially a mineral composition comprising clays, comprising or consisting of: a) a dispersing agent, selected from aluminates, aluminate precursors, phosphates, silicates and/or polyacrylates, which is capable of dispersing clay particles in an aqueous slurry, and b) a coagulating agent, selected from salts of divalent metal cations, preferably salts of alkaline earth metals and/or iron, especially magnesium, calcium and/or iron salts, capable of causing clay particles to agglomerate in a aqueous slurry.

An additive for producing a hardenable building material, especially a mineral composition comprising clays, comprising or consisting of: a) a dispersing agent, selected from aluminates, aluminate precursors, phosphates, silicates and/or polyacrylates, which is capable of dispersing clay particles in an aqueous slurry, and b) a coagulating agent, selected from salts of divalent metal cations, preferably salts of alkaline earth metals and/or iron, especially magnesium, calcium and/or iron salts, capable of causing clay particles to agglomerate in a aqueous slurry.

Disclosed is a method for preparing a mixture and the injection material to be used as soil injection material to close the pores after a certain gelling period by applying it to the pores in the silt size, including the steps of: (a) preparation of a mixture of sodium silicate with a SiO2/Na2O ratio of 3-4 and water so that their ratio by volume varies between 3/7 and 1/1; (b) obtaining a mixture by dissolving ultra-low sulfated boric acid in water, containing between 2.5-5% by weight of ultra-low sulfated boric acid; and (c) mixing the obtained ultra low sulfate boric acid-water mixture with sodium silicate in the step a.

Disclosed is a method for preparing a mixture and the injection material to be used as soil injection material to close the pores after a certain gelling period by applying it to the pores in the silt size, including the steps of: (a) preparation of a mixture of sodium silicate with a SiO2/Na2O ratio of 3-4 and water so that their ratio by volume varies between 3/7 and 1/1; (b) obtaining a mixture by dissolving ultra-low sulfated boric acid in water, containing between 2.5-5% by weight of ultra-low sulfated boric acid; and (c) mixing the obtained ultra low sulfate boric acid-water mixture with sodium silicate in the step a.