USE OF WASTES AS A SOURCE OF MINERALS AND CELLULOSE IN FIBRE REINFORCED CEMENT

摘要

The effect of replacement part of cellulose fibres and minerals by different from industry and agriculturernwastes in fibre reinforced cement production was studied. Three different wastes were tried: deinked sludge,rnmaize straw and hemp waste fibres. Pulps were obtained from maize straw and hemp fibres by organosolvrncooking with different conditions before their use as a source of fibres.rnResults showed that the replacement of a 5% of virgin fibres by the cellulose from deinking sludge couldrnimprove product strength. Furthermore, pulps from maize straw and hemp could be used as a source ofrncellulose without detrimental effects on retention and hydration processes. These results, if confirmed onrnmill scale, would improve the economy of the process due to lower cost of wastes compared with the pinernKraft pulp and, at the same time, they could open a new way to use these wastes instead of dumping orrnburning..