Hardening accelerator

Patent metadata

Field	Value
Publication number	US-11814320-B2
Application number	US-201716342011-A
Country	US
Kind code	B2
Filing date	Nov 7, 2017
Priority date	Nov 9, 2016
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

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.

First claim

The invention claimed is:

1. A setting and/or curing accelerator obtained by milling a mineral solid in a liquid medium, wherein the setting and/or curing accelerator is present as suspension and comprises the following constituents:
a) 97-99.9 w % of a dispersed inert mineral solid which is rock or rock flour;
b) 0.1-3 w % of a dispersed mineral binder which is cement;
where both the inert mineral solid and the mineral binder are present in dispersed form or in the form of suspended particles;
the mineral solid is milled to particles having an average particle size of <600 nm, and
the mineral binder is completely hydrated by the liquid medium during milling.

2. The setting and/or curing accelerator as claimed in claim 1 , wherein a proportion of liquid in the setting and/or curing accelerator is 40-85% by weight, based on the total weight of the curing accelerator.

3. The setting and/or curing accelerator as claimed in claim 1 , wherein the mineral solid is in the form of a flour before milling and/or the mineral solid has an average particle size of from 0.0001 to 1.0 mm.

4. The setting and/or curing accelerator as claimed in claim 1 , wherein the liquid medium contains water and/or alcohol.

5. The setting and/or curing accelerator as claimed in claim 1 , wherein the mineral solid is milled to particles having an average particle size of <60 nm.

6. The setting and/or curing accelerator as claimed in claim 1 , wherein the mineral solid has a proportion of 5-95% by weight in the liquid medium, based on the total weight of the liquid medium and the mineral solid.

7. A composition containing a setting and/or curing accelerator as claimed in claim 1 and also a component of a mineral binder composition.

8. A shaped body obtainable by curing a composition as claimed in claim 7 after addition of water.

9. A method comprising applying the setting and/or curing accelerator as claimed in claim 1 for accelerating the setting and/or curing of a mineral binder and/or of mineral binder compositions.

Assignees

• Sika Tech Ag

Inventors

• Müller Thomas
• Heller Thomas

Classifications

• C04B22/0086 Primary

  Seeding materials · CPC title

• C04B20/026

  Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos · CPC title

• C04B22/00863

  Calcium silicate hydrate · CPC title

• C04B28/02

  containing hydraulic cements other than calcium sulfates · CPC title

• C04B2103/12

  Set accelerators · CPC title