Abstract
These composites display excellent mechanical properties but must be adapted to the combustibility properties. The study aimed to produce polymer concrete composites using waste alumina from the metallurgic industrial processing. The composites have an ortophtalic polyester resin as a binder, as aggregates river sand and fly ash as filler. Two kinds of flame retardant were used: a residue, polishing alumina and the other virgin, commercial alumina in four different percentage 15, 30, 45 and 60% in mass in relation to the resin. The samples were subjected to testing of flexural strength, combustibility tests and temperature changes of 125, 225 and 325°C. Results had statistical treatment in order to evaluate the variable significance in relation to the studied properties. This study composites displayed values about 30 MPa for flexural strength. The statistical analysis showed that the factors temperature changes, percentage of addition and the interaction among these factors posed great influence on the studied compositions in relation to the heating strength testing. In general terms, it can be said that the flame retardant waste, polishing alumina is an efficient alternative to substitute the trihydrated commercial alumina in the polymer concrete composites with the other components proposed in this study.
Keywords:
Polishing alumina; Recycling; Polymer concrete; Fly ash; Combustibility
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