Sika Technology Ag

Christophe Kurz

Christian Bürge

Beat Marazzani

Gilbert Mäder

Franz Wombacher

Thomas Müller

Ueli Sulser

André Peter

Christian Buerge

Gilbert Maeder

Marc Schmutz

Christian Burge

A method for preparing a setting and hardening accelerator for mineral binders including a step of: (i) reacting a calcium compound CV with a silica sol SL, a molar ratio of Si:Ca being less than 0.1 during the reaction.

Accelerator for mineral binders

An adjuvant combination composed of a milling assistant and a concrete admixture for a composition including cement, for accelerating cement hydration, wherein the milling assistant includes at least one amino alcohol and at least one cement hydration accelerator selected from chlorides, thiocyanates, nitrates, nitrites and hydroxides, and the concrete admixture includes a reaction product of at least one calcium compound with at least one silicon compound selected from a silicon dioxide compound, a silica compound and a silicate compound. Using the adjuvant combination produces a significant acceleration in the hardening of a composition including cement, after the addition of water. This is an advantage especially in the production of prefabricated concrete components, allowing quicker deshuttering.

Adjuvant combination of a milling assistant and a concrete admixture for accelerated hydration of cementitious binders

An air void-forming agent, more particularly for cementitious systems, contains at least one air void-forming material with foaming effect, at least one air void-forming material with defoaming effect, and water.

Air void-forming material for cementitious systems

The invention relates to the use of caramelized sugar as a liquefier for mineral binding agent compositions.

Caramelized sugar as liquefier for mineral binding agent compositions

A hardening accelerator for mineral binder compositions, in particular for cementitious binder compositions, is provided. The hardening accelerator contains a combination of a) a first amino alcohol (A) including at least one primary alcohol group, and b) a second amino alcohol (E) including at least one secondary alcohol group.

Hardening accelerator for mineral binder compositions

A hardening accelerator for mineral binders including an amino alcohol A and/or of a salt of said amino alcohol A, for example, cementitious binders, is provided. The amino alcohol A has a structure according to formula (I) where a) Rand R, independently of one another, each represent an alkanol group including 3-4 carbon atoms, b) Ris an organic group including 1-8 carbon atoms, and c) Ris different from Rand/or R.

Hardening accelerator for mineral binders

A process for preparing a setting and hardening accelerator for mineral binders includes the following steps: a) reacting a calcium compound CV with a silicon compound SV, and b) adding an acidic compound having a molecular weight of not more than 200 g/mol, more particularly 40-100 g/mol.

Process for producing hardening accelerators for mineral binder compositions

The present disclosure relates to the use of an amino alcohol A and/or of a salt of the amino alcohol A as an additive when grinding at least one solid. The amino alcohol A has a structure according to formula I where: Rand R, independently of one another, each present an alkanol group including 2-4 carbon atoms, and b) Ris a hydrocarbon group including 1-8 carbon atoms, and c) Ris different from Rand/or R.

Dialkanolamines as additives for grinding solids

The invention relates to additives for hydraulic binders and systems produced from them, such as concrete and mortar. In particular, the present invention relates to a setting and hardening accelerator for hydraulic binders produced by means of reaction of a calcium compound CV with a silicon compound SV and addition of a phosphonic acid derivative, as well as its production.

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Endingen, Switzerland

Christophe Kurz