Sika Technology Ag

Sika Ag, Vorm. Kaspar Winkler & Co.

Sika Schweiz Ag

Sika Schweitz Ag

Marcel Sommer

Franz Wombacher

Theodor A Burge

Urs Mäder

Theodor A B&uuml;rge

Theodor A Bürge

Benedikt Lindlar

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

Sulfate-free and alkali-free setting and hardening accelerator

Alkali-free setting and hardening accelerator

Described are liquid setting and hardening accelerators for hydraulic binders and such binder comprising mixtures that preferably are alkali-free and chloride-free and that do not comprise any basic features. The setting accelerators comprise as components aluminum salts, complexing agents, corrosion inhibitors and optionally inorganic and/or organic thickening or thixotropic agents. In comparison with the use of alkaline accelerators, an essential reduction in the setting time and a faster development of high compressive strengths is achieved by the accelerators of the present invention. In comparison with commercially available alkali-free accelerators solid precipitates of aluminum salts and thereby generated plugging up of the spray nozzles is avoided and the corrosion at the spraying devices is eliminated. Said advantages result in a great economic advantage due to less maintenance needed for the devices and less interruptions of work.

Stabilized setting and hardening accelerator of low viscosity

Growing community of inventors

Winterthur, Switzerland

Marcel Sommer