Sika Technology Ag

Sika Ag, Vorm. Kaspar Winkler & Co.

Sika Schweiz Ag

Urs Mäder

Franz Wombacher

Christian Bürge

Theodor A Burge

Ulf Velten

Beat Marazzani

Irene Schober

Theodor A Bürge

Ueli Sulser

Jochen Grötzinger

Alexander Bleibler

Dieter Honert

Marcel Sommer

Carola Kaddatz

Jürg Widmer

Alexander Stücheli

Benedikt Lindlar

Patricia Gimeno Santos

Ralf Beissel

Beat Schnider

Jurg Widmer

Christian M Burge

Christian M BÜRGE

The invention relates to a method for producing a coated basic material for a hydraulic composition () comprising a basic material () and water (). According to the invention, the basic material can consist of several sub-groups () and at least one hydraulic binding agent () and to produce the hydraulic composition the basic material () and the water () are mixed in a mixer (). Prior to the mixing of the hydraulic composition, the basic material () is at least partially coated with an additive (). The invention also relates to a coated basic material to be used in concrete production, to an additive for concrete production and to a method for producing a hydraulic composition.

Method for producing a coated basic material for a hydraulic composition, coated basic material for a hydraulic composition, additive for a hydraulic composition and method for producing a hydraulic composition

The invention relates to a use of a composition containing polyorganosiloxane S and a method of reducing corrosion on steel reinforcement in reinforced concrete constructions, and also a concrete structure which is produced using such compositions. It is highly suitable for the renovation of old concrete but also for inhibition of corrosion of reinforcing iron in fresh concrete.

Use and method for reduction of corrosion

A setting and curing accelerator for hydraulic binders comprises: Al(SO)aluminum sulfate, Al(OH)aluminum hydroxide and mineral acid in aqueous solution. The setting and curing accelerator preferably comprises:

Solidification and hardening accelerator for hydraulic binding agents and method for the production thereof

Disclosed is a hydraulically setting composition containing phosphorus-oxygen acid esters or ester salts which comprise alkoxy groups. Also disclosed is a surface-modifying agent for structural steel, which contains or consists of phosphorus-oxygen acid esters or ester salts comprising alkoxy groups. The hydraulically setting composition and the surface-modifying agent are suitable for protecting reinforced concrete.

Use of phosphorus-oxygen acid esters containing alkoxy groups as corrosion inhibitors for reinforced concrete

Described are polymers and cement admixtures which reduce drop in fluidity with time. Said admixture comprises at least one polymer of the present invention and at least one polymer A. The polymer of the present invention comprises side chains of which at least 10 weight-% can be cleaved in alkaline medium. The polymer of the present invention is an acrylic polymer which comprises side chains connected to the backbone by ester linkages. These side chains may be alkyl, hydroxy alkyl, cycloalkyl or polyoxyalkylene groups. Polymer A is a cement dispersing agent. The combination of polymer A with the polymer of the present invention in a weight ratio of 0.1:10-10:1, and preferably 1:10-10:1 reduces the drop in fluidity with time of cementitious compositions.

Cement admixture for improved slump life

Described are polymers and cement admixtures which reduce drop in fluidity with time. Said admixture comprises at least one polymer of the present invention and at least one polymer A. The polymer of the present invention comprises side chains of which at least 10 weight-% can be cleaved in alkaline medium. The polymer of the present invention is an acrylic polymer which comprises side chains connected to the backbone by ester linkages. These side chains may be alkyl, hydroxy alkyl, cycloalkyl or polyoxyalkylene groups. Polymer A is a cement dispersing agent. The combination of polymer A with the polymer of the present invention in a weight ratio of 0.1:10&#x2013;10:1, and preferably 1:10&#x2013;10:1 reduces the drop in fluidity with time of cementitious compositions.

Additives are disclosed which inhibit the corrosion of metals in construction materials which contain an inorganic binder. The inventive corrosion inhibitors contain a reaction product of amines and acids or they consist of such a reaction product. Said saltlike corrosion inhibitors upon use do not develop any undesired fragrance, and they furthermore do not bring along any health risks for the persons who are working with said substances. Through the adding of the inventive corrosion inhibitors, furthermore the properties of the construction material during its preparation and also during its use can be improved. In corresponding processes for inhibiting the corrosion of metals which are in contact with the construction materials, like e.g. metal armings, the corrosion inhibitors are usually added in an amount of 0.01% by weight to 10% by weight of said reaction product, referred to the inorganic binder which is contained in such material. Construction materials which contain the inventive corrosion inhibitors provide a corrosion inhibition of any metal parts embedded into said construction materials over decades of years.

Additive and a process for inhibiting the corrosion of metals in

There is described a thixotroping and set accelerating additive for mixtures which contain as component a hydraulic binder and/or a latent-hydraulic binder and furthermore water and optionally also an aggregate and/or other additives. The inventive thixotroping and set accelerating additive consists of one or more esters of the carbonic acid or said additive is a mixture which has a pH-value of not more than 8.0, preferably not more than 7.5 and contains as component at least one of said carbonic acid esters. Optionally the inventive additives can comprise further components which frequently are added to materials containing a hydraulic binder in order to improve the workability and/or the properties of the final building material, like concrete plasticizers, concrete super-plasticizers, set retarding agents, set accelerating agents, air entraining agents and optionally further thixotroping agents and mixtures of two or more such additives. The present invention furthermore concerns a mixture containing a hydraulic binder and the inventive additive and furthermore a process for preparing such a mixture and an apparatus for performing the process.

Thixotroping and set-accelerating additive for mixtures containing a

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Frauenfeld, Switzerland

Urs Mäder