The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 2012
Filed:
Nov. 04, 2008
Lars Einfeldt, Jena, DE;
Gerhard Albrecht, Tacherting, DE;
Gerd Löhden, Hanau, DE;
Holger Kautz, Hanau, DE;
Lars Einfeldt, Jena, DE;
Gerhard Albrecht, Tacherting, DE;
Gerd Löhden, Hanau, DE;
Holger Kautz, Hanau, DE;
Construction Research & Technology GmbH, Trostberg, DE;
Evonik Rohm GmbH, Darmstadt, DE;
Abstract
The use of polymeric microparticles having a cavity in hydraulically setting building material mixtures is described, from 1 to 100% by volume of the cavity of these microparticles being filled with water. In this way, remarkable concrete resistance to the freezing and thawing cycle is achieved, these microparticles providing improved protection for the concrete from the effects of the freezing and thawing cycle, even at a diameter of from 0.1 to 1 μm and in doses which are 1 to 2 orders of magnitude lower than those described in the prior art. Moreover, the compressive strength of the correspondingly hardened concrete is substantially improved, which was likewise not foreseeable.