Results of the Leaching, Water Absorption and Mold Release for Concrete Blocks with the Addition of the Concentration Tailings of Iron Ore

• Published in: Materials science forum Vol. 820; pp. 549 - 552
• Main Authors: von Krüger, Fernando Leopoldo, da Silva, Fabiane Leocádia, Gonçalves Castro, Camila, da Silva Araújo, Fernando Gabriel
• Format: Journal Article
• Language: English
• Published: Pfaffikon Trans Tech Publications Ltd 01.06.2015
• Subjects: Concrete blocks; Iron; Iron and steel industry; Leaching; Sand; Tailings; Water absorption; Iron Ore; Water Absorption; Leaching; Tailings; Concrete Blocks
• ISSN: 0255-5476; 1662-9752; 1662-9752
• DOI: 10.4028/www.scientific.net/MSF.820.549

Tailings from the concentration of iron ore can be substituted in part for the production of concrete blocks due to the ability of encapsulation or enveloping the concrete. Many tests were conducted to recycle Concentration Tailings of Iron Ore for the Production of Concrete Block, replacing the silica sand. The Concentration Tailings of Iron Ore showed to be viable materials for the replacement of coarse and fine aggregate concrete blocks (pavers), with regard to mechanical strength after 28 days cure. Specifically, the simple substitution of hail for coarse tailings concentration of iron ore has the potential to increase the compression resistance of the concrete blocks. It was also verified that the addition of fine tailings with magnetic concentration may complicate demolding.The water absorption of the concrete block was obtained in accordance with the standards, and some blocks were within the required standards. And through the leaching test was observed that the addition of the tailings concrete blocks poses no risk to the environment when exposed to weather.