Characterization and Degradation of Ancient Architectural Red Sandstone in a Natural Erosion Environment

The properties and appearance of ancient architectural red sandstone will be damaged after being eroded by the natural environment for a long time. In order to investigate weathering erosion characteristics structure an existing building, ultrasonic testing techniques, combined with scanning electron microscopy (SEM), X-ray diffraction (XRD) computed tomography (X-CT), were used analyze building in Ganzhou. variation chemical substances contained specimens according phenology was analyzed (XRD). characteristic parameters CT grayscale images extracted wave velocity values comprehensively degradation specimens, method characterize degree as whole plane is proposed. We use gray model (GM (1, 1)) predict surface relation analysis (GRA) further correlation between its degree. results show that environment, dolomite chlorite are generated on exposed sandstone, which can protect internal certain extent. horizontal X Y directions varies, proposed calculating overall feasible. minimum average relative error obtained from prediction GM 1) 1.4591%. There good