The use of red mud and kaolin waste in the production of a new building material: Pozzolanic pigment for colored concrete and mortar

The state of Para is one the greatest producers mineral substances in Brazil. Kaolin for paper coating industry and bauxite alumina aluminium production are amongst most important commodities. latter responsible generation red mud, a well-known residue from Bayer process. kaolin processing plants also large amounts wastes, this case, very fine-grained kaolinite (white mud). research aimed to find final destination such residues by developing new building materials. proposed material pozzolanic pigment produced through calcination grinding mixtures mud waste. pigments provided increased mechanical strength color stability colored mortars relative inert pigment. characteristics reduced leaching mortars. has proven be promising its application as an innovative construction material, with possibility using these market that little explored Brazilian civil construction: concrete.