Ancient Brick Pore Structure and Saturation Coefficient Based on Environmental Variation

Abstract:

Salt solution and temperature fluctuation are predominant factors influencing the weathering performance of ancient bricks. This paper conducted laboratory test to explore weathering performance of ancient bricks in the Yellow River region. The experiment simulated brick freeze thaw cycle in fresh water and salt water, and used mercury intrusion porosimetry and five hours boiling in water to obtain pore structure characteristics and saturation coefficient. The experiment results show that the volume fraction of pore diameter of less than 1 μm decreases while that of 1 to 5 μm increases, and the saturation coefficient index is closely related to pore structure index. Pore structure index can replace saturation coefficient in evaluating the weathering performance.