Investigation of the possibility of the reutilization of some industrial wastes | Zendy

Aleksandra Kostic-Pulek | Zendy; Slobodanka Marinković | Zendy; S.R. Popov | Zendy; Jasna Đinović-Stojanović | Zendy

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Investigation of the possibility of the reutilization of some industrial wastes

Author(s) -

Aleksandra Kostic-Pulek,

Slobodanka Marinković,

S.R. Popov,

Jasna Đinović-Stojanović

Publication year - 2005

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc0506843k

Subject(s) - lime , ettringite , calcination , gypsum , mass ratio , materials science , calcium oxide , metallurgy , chemistry , waste management , cement , portland cement , organic chemistry , catalysis , aeronautics , engineering

The utilization of nitrogypsum and bottom ash, wastes from the factory "Milan Blagojevi}" (Lu~ani-Serbia), was investigated. For this purpose, mixtures composed of calcined nitrogypsum (CaSO4 . 0.5H2O), ash (mass ratio 1:1) and water (water/solid mass ratio 0.5), as well as similar mixtures consisting of 1.0 mass % 5.0 mass % 10.0 mass % of lime (CaO) with the same gypsum/ash and water/solid mass ratios, were prepared. These mixtures gave solidified products at room temperature and atmospheric pressure, which after 28 days had satisfactory compressive strengths for application in the civil industry. The product with 5.0 mass % of added lime has the best mechanical characeristics. X-ray and qualitative IR analysis showed that this product mainly consisted of calcium sulphate dihydrate (CaSO4 . 2H2O) and carbonates, as well as a small quantity of ettringite (3CaO . Al2O3 . 3CaSO4 . 32H2O).

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