Permeability evolution and mechanism of thermally damaged basalt fiber-reinforced concrete under effective stress

摘要

This paper presents an experimental study of the permeability evolution of thermally damaged basalt fiber-reinforced concrete (BFRC) under effective stress. Initial permeability, temperature damage coefficient, stress sensitivity, and maximum permeability damage rate of BFRC increased gradually with temperature, while they decreased with the increased cycles of effective stress loading and unloading. The permeability of BFRC shows nonlinear attenuation in the effective stress loading stage, and the permeability recovery degree of BFRC decreases with the decrease of effective stress in the unloading stage. The mechanism of permeability evolution is revealed based on the changes in pore characteristics. (C) 2020 Elsevier Ltd. All rights reserved.