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:
Jan. 29, 2013
Filed:
Jul. 24, 2007
Armin Just, Dortmund, DE;
Bernhard Middendorf, Calden, DE;
Juergen Neisecke, Dortmund, DE;
Universitaet Dortmund, Dortmund, DE;
Abstract
The invention relates to an expanded concrete composed of binder-containing mixtures, preferably having binders composed of Portland cement as specified in DIN EN 197 or of mixtures of hydraulic, latent-hydraulic and/or pozzolanic binders, having binders, water with a fraction of 20-60% by mass based on the mass of the binder in the mixture, chemical gas-forming agent, preferably in the form of aluminum powder, at 0.05-0.25% by mass, based on the mass of the binder, for forming mostly air pores in the expanded concrete, wherein the gas-forming agent in the form of a powder forms a mixture of different particle sizes, concrete additives such as in particular microsilica and/or flyash with a fraction of 0.5-25% by mass, based on the mass of the binder, concrete admixtures of mostly liquefying character and at a fraction of 0.5-5% by mass, based on the mass of the binder, wherein the distribution of the air pores of different sizes in the matrix of the expanded concrete, depending on its consistency, makes possible a compressive strength up to 30 N/mmafter curing, and the expanded concrete is air-curing at atmospheric pressure under normal ambient temperature. In addition, a method is proposed of producing such an expanded concrete, and also a test method of determining the fresh concrete properties of an expanded concrete according to the invention.