THE MECHANICAL PROPERTIES OF CONCRETE WITH RED MUD (BAUXITE RESIDUE) AND NANO-Al2O3 AT HIGH TEMPERATURES
FRESENIUS ENVIRONMENTAL BULLETIN, vol.28, no.6, pp.4692-4701, 2019 (SCI-Expanded)
- Publication Type: Article / Article
- Volume: 28 Issue: 6
- Publication Date: 2019
- Journal Name: FRESENIUS ENVIRONMENTAL BULLETIN
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
- Page Numbers: pp.4692-4701
- Keywords: Red mud, Nano-Al2O3, Mechanical properties, Weight loss, Elevated temperatures., NANO-ALUMINA, COMPRESSIVE STRENGTH, NANO-FE2O3 POWDERS, FIRE RESISTANCE, CEMENT MORTAR, FLY-ASH, PERFORMANCE, BEHAVIOR, SILICA, MICROSTRUCTURE
- Ataturk University Affiliated: Yes
Abstract
This study was carried out in order to produce a concrete with better performance by examining the effect of red mud, which is a waste material, and Nanopowder (Nano-A1203) additives on the mechanical properties of concrete under the influence of high temperature. Samples were made by replacing 10% of the cement with red mud and adding Nano-A1203 into the concrete in the ratios 0.5%, 1%, and 1.25%, respectively. The test specimens were exposed to temperatures of 200, 400 and 600 C, for 3 hours. Residual stresses and tensile strength, as well as weight loss values, were determined after high-temperature exposures. As a result, it can be said that the combination of red mud and Nano-A1203 under high temperature had positive effects on the concrete, and the optimum ratio was 10% red mud and 0.5% Nano A1203. A significant reduction in the mechanical properties of concrete normally occurs with increasing temperature; however, the use of red mud waste material in addition to Nanopowder under the effect of high temperature produces a concrete with a better performance.