Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Verfahren und Vorrichtung zur Herstellung von Leichtbeton und Zuschlagstoff fuer diesen

Production of lightweight concrete containing granular plastics aggregate, useful in construction, uses plastics scrap rendered inert by chemical treatment and optionally fractionated in particle shape classifier.
 
: Geissler, A.; Barth, M.; Biedermann, U.; Angerer, G.; Marschmeider-Weidemann, F.; Mueller, H.; Herold, G.; Garrecht, H.

:
Frontpage ()

DE 1998-19857130 A: 19981211
DE 1998-19857130 A: 19981211
WO 1999-EP9690 A: 19991209
EP 1999-963450 AW: 19991209
DE 19857130 A1: 20000615
EP 1150929 B1: 20040310
C04B0016
C04B0016
German
Patent, Electronic Publication
Fraunhofer ICT ()

Abstract
Es wird ein Verfahren zur Herstellung von Leichtbeton vorgeschlagen, wobei Kunststoffzuschlaege, die zumindest teilweise aus Kunststoffabfaellen bestehen, zugesetzt und vor dem Zusetzen durch chemische Behandlung mit starken Laugen und/oder starken Saeuren inertisiert werden. Die Kunststoffzuschlaege koennen vor dem Zusetzen in verschiedene Korngroessenfraktionen klassiert und die Kunststoffzuschlaege wenigstens einer Korngroessenfraktion mit gewuenschter Korngroesse in verschiedene Kornformfraktionen getrennt werden.

 

DE 19857130 A UPAB: 20000811 NOVELTY - In the production of lightweight concrete containing granular plastics aggregate, the plastics consist (partly) of scrap, which is first rendered inert by chemical treatment with strong caustic alkali and/or strong acid. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:- (1) equipment for separating granular material into various grain fractions; (2) plastics aggregate for lightweight concrete in the form of granular waste rendered inert by chemical treatment with strong caustic alkali and/or strong acid. USE - The separating equipment is used for separating round and angular grains, especially the plastics aggregate (all claimed). The lightweight concrete is useful e.g. in overground, underground, agricultural and horticultural construction and road building. ADVANTAGE - Recycling plastics scrap saves mineral oil resources and reduces carbon dioxide and associated toxic emissions by avoiding incineration. However, impurities in the scrap can make concrete swell on exposure to humidity and reduce the strength. Chemical treatment eliminates this problem. The lightweight concrete has good processing properties and pumpability and no or little swelling and gives durable lightweight structures of satisfactory strength.

: http://publica.fraunhofer.de/documents/PX-63571.html