Sika Technology Ag

Thomas Heller

Thomas Müller

Dieter Honert

Colin Hurley

A process for producing a setting and/or curing accelerator for mineral binders is characterized in that a mineral solid is subjected to milling in a liquid medium.

Hardening accelerator

A description is provided of the use of an additive including polycarboxylate ether and/or lignosulfonate as grinding aid in cement grinding for producing a cement, especially when fly ash and rock flour are used in the cement. The additive is preferably an aqueous additive. The use of the grinding aid in the production of the cement leads to improved processability of concrete or mortar produced from the cement. In particular, improved stiffening behavior, a reduced water requirement, or a reduced superplasticizer requirement for the mortar or concrete is obtained.

Grinding aid for cement clinker based on polycarboxylate ethers and/or lignosulfonates

An additive composition including a grinding aid selected from glycols, monocarboxylic acids with 1 to 4 carbon atoms, and comb polymers; as well as at least one retardant, which can be used during the process of grinding cement clinker and which leads to low brown discoloration of the ground cement in the processed state.

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Meckesheim, Germany

Thomas Heller