Abstract: A method and system for rewriting Structured Query Language (SQL) statements. A SQL statement having search criteria including conditions pertaining to fields in database tables is received. A table from the SQL statement listing all combinations of the search criteria is created, every combination reflecting a subset of information used to determine combined results. A set of patterns among the possible combinations of the SQL statement based on the fields referenced in the combinations is identified. The table based on the set of patterns is sorted. Based on the sorting, the table is divided into temporary tables which are joined with the SQL statement. New temporary tables are generated. Each new temporary table includes results of a search conducted using a separate portion of the SQL statement as joined with the set of temporary tables. All results from the new temporary tables are combined into a single result table.

Abstract: A method and system for rewriting Structured Query Language (SQL) statements. A SQL statement having search criteria including conditions pertaining to fields in database tables is received. A table from the SQL statement listing all combinations of the search criteria is created, every combination reflecting a subset of information used to determine combined results. A set of patterns among the possible combinations of the SQL statement based on the fields referenced in the combinations is identified. The table based on the set of patterns is sorted. Based on the sorting, the table is divided into temporary tables which are joined with the SQL statement. New temporary tables are generated. Each new temporary table includes results of a search conducted using a separate portion of the SQL statement as joined with the set of temporary tables. All results from the new temporary tables are combined into a single result table.

Abstract: Under the present invention, a SQL statement having search criteria is received. Upon receipt, a table that lists all possible combinations of the search criteria is created. From the table, a set of patterns among the possible combinations is identified. Based on these patterns, the table is then sorted. Once sorted, the table is divided into a set of temporary tables based on the set of patterns/sorting operation. The set of temporary tables are then individually joined with the SQL statement and separate searches are conducted. A new set of temporary tables is then generated and populated with results of the separate searches. These result tables are then unioned/combined into a single result table.

Abstract: A method and apparatus for controlling the flow rate of relatively low viscosity fluids, such as accelerators, in viscous, hydraulic slurry spray application systems. An adjustable accelerator flow control system which regulates excess air pressure supplied to the accelerator pump in response to height variations of the spray nozzle is provided. The system is especially useful with fireproofing compositions since it provides effective distribution and constant flow of a viscous, hydraulic cementitious slurry with an acidic accelerator.

Abstract: A method of posttreating a concrete structure to provide corrosion inhibiting properties by heating the structure to remove entrapped water, cooling the structure under a maximum temperature gradient of +2.degree. C./in. thickness, applying an aqueous solution of corrosion inhibitor and then an aqueous wash.

Abstract: A stable, aqueous dispersion of silica fume is formed using a 70-80% ferrosilicon production fume by-product by the inclusion of very small amounts of a stabilizing agent selected from a phosphoric acid, citric acid, hydrofluoric, fluorosilicic acid or their sodium or potassium salts or mixtures thereof.

Abstract: A superplasticizer cement admixture for portland cement based compositions formed from a low molecular weight alkali metal polyacrylate in combination with an alkali metal or alkaline earth metal polynaphthalene sulfonate-formaldehyde or an alkali metal lignosulfonate or an alkaline earth metal lignosulfonate or mixtures thereof.

Abstract: Reinforced concrete structures often suffer corrosion damage. This damage is repaired by removing the layer of distressed concrete around the metal reinforcement and filling in the removed area with a high content calcium nitrite-containing cement based composition.

Abstract: This invention is directed to coating metal elements with a thin film of calcium nitrite (including compositions containing same) whereby the metal is inhibited against corrosion on being placed in hydraulic cement.

Abstract: Additive, e.g., ethoxylated nonylphenol, for lignin type water-reducing agent in hydraulic cement compositions, reduces air entrainment in the concrete mix.

Abstract: Disclosed herein is a process for preparing aqueous solutions of calcium nitrite by forming a solution of sodium nitrite and calcium nitrate; cooling the solution to precipitate sodium nitrate; admixing calcium hydroxide with the residual aqueous phase and forming a double salt of calcium nitrite/calcium hydroxide; and decomposing the double salt in the presence of water to form a solution of calcium nitrite and insolubilize calcium hydroxide.

Abstract: This invention is directed to a concrete which is capable of inhibiting corrosion of metal pieces contained therein or in contact therewith comprising a high strength concrete formed from hydraulic cement and containing at least about 2 percent Ca(NO.sub.2).sub.2 therein.

Abstract: An applicator suitable for one-man application of sheet material in an accurate manner onto structural substrates wherein the applicator can direct changes in the path of application while readily maintaining control over the roll of sheet material.

Abstract: A method of preparing a preformed sheet-like waterproofing material in the form of a laminate structure of a sheet-like flexible support member having on one side thereof a flexible membrane of an adhesive bituminous composition. The method requires placing the flexible sheet-like polymeric support member in facing relationship with a forming surface, applying a coating of an adhesive bituminous composition having a temperature above the melting point of the polymeric support member to the opposite surface of the support and simultaneously cooling the forming surface at a rate at least sufficient to maintain the support member thereon below its melting point for a time at least sufficient to permit the bituminous composition to cool below the melting point of the support member. The present method alleviates the utilization of a non-structural release sheet during formation or packaging of the waterproofing composite structure.

Abstract: A water-reducing admixture for use in hydraulic cement compositions comprising about 25 parts by weight of a lignosulfonic acid salt, from about 6 to 16 parts of calcium formate; and from about 2 to 8 parts of monosaccharides.

Abstract: A novel preformed, sheet-like, flexible material suitable for waterproofing or substructural surfaces, the sheet-like material having a laminate structure of (1) a waterproof and waterproofing pressure-sensitive adhesive membrane having a surface of predetermined width extending from edge to edge of said membrane; and (2) a support covering said entire predetermined width of said surface, said support comprising (a) a major flexible support sheet superimposed on a major portion of said surface, and (b) at least one minor support sheet, each of said at least one minor support sheets extending from one of said edges toward the major support sheet. The flexible polymeric support covering the major portion of the membrane's covered surface has its free face substantially non-adherent to the composition of the waterproofing adhesive membrane.

Abstract: A method of controlling and removing ice and snow from roads and bridge deckings in a substantially non-corrosive manner by applying calcium nitrite to such areas at a rate of from 1 to 50 tons per two-lane mile. The present method is particularly applicable to the control and removal of snow and ice from roads and bridges formed from hydraulic cement.

Abstract: Improved method of forming zinc chromate on galvanized reinforcing bars comprising treating the bar directly with calcium chromate.