| Abstrakt: |
With recycled coarse aggregate replacement ratio, basalt fiber (BF) dosage, and exposure temperature as variation parameters, 162 specimens were designed and fabricated to examine the influence of elevated temperature exposure on the indirect tensile properties of basalt fiber-reinforced recycled aggregate concrete (BFRRC). The BFRRC specimens underwent splitting tensile and flexural tests after exposure to an elevated temperature. The failure modes of the specimens were observed and the effects of the variation parameters on the indirect tensile properties of BFRRC were analyzed. Simultaneously, the interrelationships among splitting tensile strength, flexural strength, and cubic compressive strength were examined. Results show that, the functional correlations among the aforementioned strength indices are determined. The temperature exerts the greatest influence on the failure mode of BFRRC. In addition, the inclusion of fibers improves the damage degree, while the effect of replacement ratio is insignificant. The mechanical properties of BFRRC, including its indirect tensile strength, exhibit a decrease with increasing replacement ratio and temperature. Conversely, an increase in fiber dosage enhances these qualities. The conclusions obtained in this study provide a reference to the application of BFRRC. [ABSTRACT FROM AUTHOR] |
