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Polyurethane coating for protecting concrete floors using parquetry with fillers originating from recycling
|Joanna Ryszkowska 1, Janusz A. Rebis 1, Maciej Langner
1. Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland
Very often the top layer of systems covering a concrete surface is made from polyurethanes. The polyurethane layer should have high tensile strength and abrasive wear resistance, because these materials are used in workshops, corridors, and warehouses. Polyurethanes are one of the most expensive commonly used polymers. That is why the Department of Materials Science and Engineering proposed using granulated polyurethane waste of different hardness as a filler for concrete coating.
The aim of this paper is to characterize the composites, which were synthesized with identical parameters as the system producer recommendations. Polyurethane layer was obtained from: two components polyurethane coatings and polyurethane recyclate, hardness 80oShA and density (1,2464g/cm3) and 50oShD (1,2725g/cm3). Recyclate, grain size 0,4-1,5 mm was obtained from polyurethane with high abrasive wear resistance. Poliols components with 12% to 30% wt. of polyurethane recyclate in room temperature were mixed. Into this mixture isocyanate component was added. The samples were conditioned for two weeks at standart conditions.
The mechanical properties of composites as tensile strength, ultimate elongation, hardness, and abrasive wear were investigated. Endurance properties were formulated during bending, tensile strength and ultimate elongation. SEM was used for structure investigation.
As a result of the research materials of higher resistance to abrasive wear and Young modulus with unchanged resistance to tensile strength, ultimate elongation and bending were obtained. Furthermore the permanent deformation of researched materials were decreased. Addition of recyclate, hardness 50oShD causes an increase in abrasive wear resistance to 150%, whilst the cost of the material is lowered.
Presentation: poster at E-MRS Fall Meeting 2005, Symposium G, by Janusz A. Rebis
See On-line Journal of E-MRS Fall Meeting 2005
Submitted: 2005-06-15 12:11 Revised: 2009-06-07 00:44