Abstract: 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.

Abstract: Purposes of the present invention are to provide a dry coated sand having a high degree of fluidity at the room temperature, a method of advantageously producing the coated sand, and a method of producing a casting mold having excellent properties, by using the coated sand. The dry coated sand is obtained by mixing an aqueous solution of a water glass used as a binder, with a heated refractory aggregate, whereby water in the aqueous solution is evaporated, and a coating layer of the binder is formed on surfaces of the refractory aggregate. A moisture percentage in the thus obtained dry coated sand is controlled so as to be not more than 0.5% by mass. The intended casting mold is obtained by filling a molding cavity of a forming mold, with the dry coated sand, and passing a steam through the coated sand, to solidify or cure the coated sand.

Abstract: Swellable spacer fluids can be useful in subterranean operations for sealing an annular space in a well bore, such as the annular space between a tubular and the subterranean formation or between two concentric tubulars, or for forming a seal inside a well bore in the subterranean formation. One embodiment of such methods involves providing a swellable fluid, wherein the swellable fluid comprises: an aqueous fluid, a crosslinking agent, and at least a plurality of swellable particles; and placing the swellable fluid in a subterranean formation, and allowing the spacer fluid to form a semi-solid crosslinked gel structure in the subterranean formation.

Abstract: Soluble silicates are commonly used to block and strengthen permeable zones in subterranean formations. These applications include conformance for oil field, grouting for the construction industry and water shut-off for mining. It was discovered that set times and set properties could be improved by using novel, high ratio alkali silicates. Ratio being defined as the mol ratio of SiO2:Me2O, where Me is an alkali metal and is most commonly sodium or potassium (i.e. Na2O and K2O).

Abstract: The invention provides a water-borne complete inorganic alkali silicate composition capable of solving the problem of gelation occurred in a preservation solution without using anionic organic substances, expanding the range of application dramatically, additionally solving the problem of efflorescence after coating, which is the biggest problem when the molar ratio is low, and furthermore curing at normal temperature without baking, enabling long-lasting effects. The water-borne complete inorganic alkali silicate composition is comprised of a mixture of an alkali metal silicate including a simple or a mixture of potassium silicate or sodium silicate, a colloidal silica, and a simple or a mixture of a sodium phosphate compound or a potassium phosphate compound.

Abstract: A filler for reinforcement joint that ensures excellent fluidity and retention thereof, exhibiting appropriate length change ratio and high strength performance; and a method of reinforcement joint filling operation using the same. There are provided a filler for reinforcement joint containing a cement, an expanding material, a pozzolana micropowder, a water reducing agent and a sand, and a method of reinforcement joint filling operation using the same, characterized in that the expanding material is a calcium aluminoferrite expanding material, and that the pozzolana micropowder is a silicious micropowder having a silicon dioxide (SiO2) content of 90% or higher and having a hydrogen ion concentration falling in an acid region, and that the water reducing agent is a polycarboxylic acid water reducing agent. The calcium aluminoferrite expanding material preferably has a value of Brain specific surface area of 2000 to 6000 cm2/g. The sand is preferably a weighty sand of 3.0 g/cm3 or higher density.

Abstract: The present invention provides an aluminum white rust inhibiting composition containing alkali metal metasilicate and alkali metal hydroxide as essential components. The composition described by the present invention can provide an anti-corrosion function to vehicle aluminum parts without a separate surface process, thus reducing the manufacturing cost by reducing the number of processes and improving the durability of the vehicle aluminum parts.

Abstract: The invention provides a water-borne complete inorganic alkali silicate composition capable of solving the problem of gelation occurred in a preservation solution without using anionic organic substances, expanding the range of application dramatically, additionally solving the problem of efflorescence after coating, which is the biggest problem when the molar ratio is low, and furthermore curing at normal temperature without baking, enabling long-lasting effects. The water-borne complete inorganic alkali silicate composition is comprised of a mixture of an alkali metal silicate including a simple or a mixture of potassium silicate or sodium silicate, a colloidal silica, and a simple or a mixture of a sodium phosphate compound or a potassium phosphate compound.

Abstract: Provided is a composition for coating that can form a waterproof siliceous coating film. To impart water resistance to a film formed by binder of alkali silicate, radioactive material is used in combination with the binder. Additionally, inorganic filler, inorganic body pigment, inorganic color pigment, additive, and water are used in combination, thereby attaining a coating film that combines water resistance, acid resistance, and non-flammability.

Abstract: An aqueous, curable coating composition comprising a mixture of: (a) at least one water-soluble alkali metal silicate and (b) an effective amount of a water-soluble crosslinking agent comprising an alkali metal aluminophosphate, or an alkali metal aluminoborophosphate, or an ammonia aluminophosphate, or an ammonia aluminoborophosphate, or an alkali metal ammonia aluminophosphate, an alkali metal ammonia aluminoborophosphate, or a mixture of two or more of the foregoing phosphates. The coating composition will often not contain any visually discernible precipitate. The coating composition may be applied to a substrate, such as a glass, a ceramic, concrete or a metal and thereafter cured by air drying or by heating to a temperature of up to about 240° C. (or higher, if desired).

Abstract: An aqueous, curable coating composition comprising a mixture of: (a) at least one water soluble alkali metal silicate; and (b) an effective amount of a water-soluble crosslinking agent comprising an alkali metal aluminophosphate, or an alkali metal aluminoborophosphate, or an ammonia aluminophosphate, or an ammonia aluminoborophosphate, or an alkali metal ammonia aluminophosphate, an alkali metal ammonia aluminoborophosphate, or a mixture of two or more of the foregoing phosphates. Preferably, the coating composition will not contain any visually discernable precipitate. The coating composition may be applied to a substrate such as a glass, a ceramic, concrete or a metal and thereafter cured by air drying or by heating to a temperature of up to about 240° C. (or higher, if desired).

Abstract: A mixing agent for improving soil consists of cations selected from Ca++, Na+, Mg++, K+, NH4+, Ba++, Fe3+, Al3+, Mn4+, Co++ and Ti4+, anions selected from Cl−, SO4−− and PO43−, and organic acid such as citric acid, tartaric acid and maleic acid.

Abstract: An inorganic binder system for foundry compositions includes a silicate and added phosphate. The composition produces a binder having the advantageous strength properties of a silicate binder system with the dispersibility properties of a phosphate binder system. Methods of making and using the binder systems and the resulting products are of particular interest to the foundry art.

Abstract: Novel aluminum phosphates, in particular amorphous aluminum phosphate powders having a BET specific surface no greater than 25 m.sup.2 /g, well suited as binders/hardeners or for the production of ceramic shaped articles, are prepared by reacting at least one aluminum compound, e.g., an aluminum oxide, hydroxide or oxyhydroxide, with phosphoric acid or an aluminum phosphate, e.g., an acid aluminum orthophosphate, in a liquid reaction medium devoid of inorganic acid anions other than of phosphoric acid, and then spray- or freeze-drying the suspension thus obtained.

Abstract: The invention relates to a crystalline sheet sodium silicate of the general formulaxNa.sub.2 O.multidot.ySiO.sub.2 .multidot.zP.sub.2 O.sub.5in whichthe ratio of x to y corresponds to a number from 0.35 to 0.6,the ratio of x to z corresponds to a number from 1.75 to 1200and the ratio of y to z corresponds to a number from 4 to 2800,a process for its preparation and its use.

Abstract: An insoluble silica based film is formed by placing an ammonium compound and an alcohol as a plasticizing agent in an aqueous solution and blending the aqueous solution with a sodium silicate. The mixture is allowed to condense which produces the insoluble silica-based film. The film is used as a binder, and has particular application as a vehicle in a paint. The invention also describes a method for preparing an insoluble silica-based binder.

Abstract: Inorganic liquid filler compositions, well suited for the sealing or consolidation of ground formations or construction/building materials by injecting such composition into the fissures, cavities or interstices thereof (void volume) and permitting the composition to harden, comprise a homogeneous solution of (i) an alkali metal silicate, (ii) an alkali metal polyphosphate and (iii) an alkali metal aluminate.

Abstract: Aqueous coating compositions for glass or ceramic substrates contain at least one water soluble alkali silicate and a cross-linking agent produced by reacting at least one alkali hydroxide with an aluminum phosphate. The coating compositions are applied to a glass or ceramic substrate and heat cured.

Abstract: An inorganic coating composition has a curable powder which contains a hydraulic calcium aluminate compound, a metallic oxide reinforcing agent and a pigment, and a binder solution which contains an alkali-metal silicate solution and a soluble phosphate.

Abstract: An alkali-activated silicate based cement or binder has a cure characteric which is modified by a phosphate additive which retards the set time of the cement or binder. The phosphate allows a longer set time than conventional alkali-activated silicate glass cements.