Yara International Asa

University of California

Construction Research & Technology Gmbh

Wolfram Franke

Marina Ettl

Gaurav N Sant

Erika Callagon La Plante

Gabriel D Falzone

Paul Horst Seiler

Tandre Oey

Hilde Brekke Dahl Thommesen

Giuseppe Cilluffo

Rune Bakke

Günther Doppelbauer

Nikolaos N Stavroulakis

Jan Hilmers

Tim Corben

Bjørn Helge Engesveen

Anne Mette Langholm

Werner Van Borm

Thorsten Stoeck

Hans-Werner Breiner

Gianluca Romegialli

Carlos Antonio Saldias Dinamarca

Hilde Thommesen

Mehrdad Torabzadegan

Gamunu L Samarakoon

Tom Granli

A method for the corrosion inhibition, and optionally rehabilitation, of metal reinforcements present in a hardened concrete construction having one or more surfaces that are exposed to chloride intrusion, wherein the method comprises the step of applying an aqueous alkali metal nitrate solution, an aqueous alkaline earth metal nitrate solution, an aqueous zinc nitrate solution, an aqueous aluminium nitrate solution, an aqueous ammonium nitrate solution or a mixture thereof on one or more of the surfaces. The present disclosure also relates to the use of an aqueous alkali metal nitrate solution, an aqueous alkaline earth metal nitrate solution, an aqueous zinc nitrate solution, an aqueous aluminium nitrate solution, an aqueous ammonium nitrate solution or a mixture thereof as a corrosion inhibitor by applying it on one or more surfaces of hardened concrete construction comprising metal reinforcements that are exposed to chloride intrusion. Furthermore, the present disclosure relates to a corrosion inhibiting composition for inhibition of corrosion of metal reinforcements present in a hardened concrete construction having one or more surfaces that are exposed to chloride intrusion.

Corrosion inhibition of metal reinforcement present in a hardened concrete construction having one or more surfaces that are exposed to chloride intrusion

A manufacturing method includes: (1) incorporating at least one soluble, calcium, magnesium, or other divalent cation-containing additive into a concrete mixture including aggregates prone to alkali-silica reaction; and (2) curing the concrete mixture to form a concrete product.

Mitigation of alkali-silica reaction in concrete using readily-soluble chemical additives

The present application relates to a setting and hardening accelerator for a cement, mortar or concrete composition, optionally comprising cement replacement materials (CSMs). The accelerator composition comprises an aqueous nitrate solution and an alkaline hydroxide. Particularly, the aqueous accelerator composition comprises between 30 and 55 w/w % of a nitrate salt as a nitrate solution and between 0.02 and 0.1 w/w % of an alkaline hydroxide, which is dissolved in the nitrate solution and, optionally, as a hydroxide precipitate in the accelerator composition, wherein the accelerator composition has a pH of at least 9.0. In case the cement, mortar or concrete composition comprises CSMs, the accelerator composition has a pH of at least 12.0. The application furthermore relates to the use of the accelerator composition according to the present application and to a method for accelerating a cement, mortar or concrete composition by reacting the composition with the accelerator according to the application, in particular at cold temperatures.

Setting and hardening accelerator for a cement, mortar or concrete composition, optionally comprising supplementary cementitious materials, and use of this accelerator

The present application relates to a method to prevent the emission of hydrogen sulphide in the production of hot bitumen or asphalt having a temperature of between 150 and 200&#xb0; C., wherein the method comprises the steps of providing a bituminous or asphalt mixture, heating the mixture until a temperature of between 150-200&#xb0; C. and adding an aqueous calcium nitrate solution or a calcium nitrate powder while mixing the bituminous or asphalt mixture. The present application furthermore relates to the use of an aqueous calcium nitrate solution or a calcium nitrate powder during mixing of a bituminous or asphalt mixture in the production of a hot bitumen or asphalt having a temperature of between 150 and 200&#xb0; C. to prevent the emission of hydrogen sulphide.

Prevention of the emission of hydrogen sulphide in the production of hot bitumen or asphalt

The invention relates to a process for reducing the amount of sulphur compounds in a sulphur compounds contaminated wastewater stream, using a granular sludge treatment system () comprising anaerobic microorganisms, wherein the process comprises the steps of adding an aqueous nitrate solution to the wastewater stream, contacting the wastewater stream with the anaerobic microorganisms, and anoxic oxidation of at least part of the sulphur compounds in the sulphur compounds contaminated wastewater stream by the anaerobic microorganisms, resulting in a sulphur compounds depleted wastewater stream. The invention furthermore relates to such a granular sludge treatment system ().

Reduction of the amount of sulphur compounds in a sulphur compounds contaminated wastewater stream using a granular sludge treatment system

The application relates to the use of a powder comprising calcium nitrate as a setting accelerator for a tile adhesive blend, wherein nitrate powder comprising calcium nitrate, and optionally also comprising a nitrate salt different than the calcium nitrate, specifically potassium or ammonium nitrate, and having a particle size of between 0.01 mm and 1 mm is used as the setting accelerator. The application furthermore relates to a process for producing such a setting accelerator comprising, in one possible embodiment, the step of cutting or grinding prills and/or granules comprising the calcium nitrate and optionally the different nitrate salt, and in another embodiment, a spray drying process, resulting into the setting accelerator. The application also relates to a tile adhesive blend comprising at least a cement, sand and a such setting accelerator.

Setting accelerator for a tile adhesive blend

The present invention concerns a biochemical process for the denitrification of a hypersaline wastewater composition.

Denitrification of saline industrial waste water

The invention relates to a process and a biofilter system () for removing HS from a HS contaminated energy production gas stream containing methane. The aqueous biofilter system comprises a biofilter () having biofilter support material constituting a biofilter bed supporting a humidified biofilm having microorganisms that are capable of oxidizing HS. The process comprises the steps of contacting the HS contaminated energy production gas stream with the microorganisms of the humidified biofilm, and oxidation of at least part of the HS in the HS contaminated energy production gas stream by the microorganisms, resulting in a HS depleted energy production gas stream, wherein the process further comprises the step of adding an aqueous nitrate solution to the HS contaminated energy production gas stream prior to being contacted with the microorganisms, enabling the microorganisms to oxidize the HS under anoxic conditions. The invention furthermore relates to the use of such a biofilter system () in the removal of HS from a HS contaminated energy production gas stream containing methane.

Process and biofilter system for H2S removal from a H2S contaminated energy production gas stream containing methane and use of such a biofilter system

The invention relates to a setting accelerator for a dry mortar blend, the setting accelerator being in the form of a powder comprising calcium nitrate and having a water content between 0.1% and 20%. The invention furthermore relates to a process for producing such a setting accelerator, wherein either prills and/or granules comprising calcium nitrate and a different nitrate salt are processed forming a powder comprising calcium nitrate and the different nitrate salt and having a water content of higher than 5% and lower than 20%, either an aqueous solution at least comprising dissolved calcium nitrate is spray dried at a temperature between 150&#xb0; C. and 250&#xb0; C., forming a powder comprising at least calcium nitrate and having a water content between 0.1% and 20%, the powder serving as the setting accelerator. The invention also relates to a dry mortar blend comprising at least a cement, sand and a setting accelerator according to the invention and to a mortar paste comprising the dry mortar blend according to the invention which is mixed with water.

Setting accelerator for a dry mortar blend, process for producing such a setting accelerator, a dry mortar blend and a mortar paste

The present invention relates to an admixture for a cementitious composition, the cementitious composition comprising said admixture and a method for casting a durable cementitious solid, in particular a concrete, in cold weather conditions, such as in winter time or in cold geographical areas, more in particular for casting part of the cement tube in bore hole drilling in cold weather conditions.

Corrosion protected fibre-reinforced cement composition for use in cold temperature conditions

The present invention relates to an admixture for a cementitious composition and a method using said admixture for manufacturing a durable cementitious composition, in particular a concrete, in cold weather conditions, such as in winter time or in cold geographical areas.

Antifreeze composition for producing a durable concrete in cold temperature conditions

The present invention concerns a process for treatment of industrial waste water containing both easy biodegradable and heavy biodegradable matter wherein the process comprises the two steps of first treating the waste water in a bioreactor wherein a nitrate solution is added and secondly treating the waste water in a chemical oxidation step wherein an oxidizer, permanganate, is added.

Process to treat industrial wastewater

The invention relates to the use of calcium nitrate for producing a cementitious composition and/or a cementitious solid at high ambient temperatures. The invention is directed to ensuring sufficient hydration by a limitation of the maximum hydration temperature.

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Porsgrunn, Norway

Wolfram Franke