Performance of aerated lightweighted concrete using aluminum lathe and pumice under elevated temperature

The primary objective of this study is to investigate the production and performance characteristics of structural concrete incorporating varying proportions (0%, 25%, and 50% by volume) of pumice stone, as well as aluminum lathe as an additive at 0%, 1%, 2%, and 3%, under fire conditions. The experiment will be conducted over a period of up to 1 hour, at temperatures ranging from 24 degrees C, 200 degrees C, 400 degrees C and 600 degrees C. For the purpose of this, a total of twelve test samples were manufactured, and then tests of compressive strength (CS), splitting tensile strength (STS), and flexural strength (FS) were performed on these samples. Next, a comparison was made between the obtained values and the influence of temperature. To achieve this objective, the manufactured samples were placed at temperatures of 200 degrees C, 400 degrees C, and 600 degrees C for a duration of 1 hour, and were subjected to the influence of temperature. These values at 24 degrees C were then contrasted with the CS results obtained from test samples that were subjected to the temperature effect for an hour at 200 degrees C, 400 degrees C, and 600 degrees C. A comprehensive analysis of the test outcomes reveals that the incorporation of aluminum lathe wastes into a mixture results in a significant reduction in the compressive strength of the concrete. As a result of this adjustment, the CS values dropped by 32.93%, 45.70%, and 52.07%, respectively. Furthermore, It was shown that testing the ratios of pumice stone alone resulted in a decrease in CS outcomes. Additionally, it was found that the presence of higher temperatures is clearly the primary factor contributing to the decrease in the strength of concrete. Due to elevated temperatures, the CS values decreased by 19.88%, 28.27%, and 38.61% respectively. After this investigation, an equation that explains the connection between CS and STS was provided through the utilization of the data of the experiments that were carried out.