The effect of frost weathering at the dinosaur tra

Authors: Jihwan Park HyeongDong Park

Publish Date: 2016/11/08

Volume: 76, Issue: 4, Pages: 1417-1429

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Abstract

Cultural monuments and geological heritage sites composed of natural stone are severely affected by frost weathering in cold regions or during the winter season in midaltitude regions The effect also occurs at the dinosaur tracksite in Seoyuri Hwasun Korea which is not sheltered To assess the influence of frost weathering on the tracksite freeze–thaw experiments were carried out in the laboratory up to 100 cycles simulating geological and meteorological conditions of the site The variation on physical properties were measured at a core scale as weathering progressed The decreases in dry weight P and Swave velocity and elastic modulus and the increase in absorption rate and Poisson’s ratio showed the physical deterioration of the specimens The microstructural properties were also measured using microcomputed tomography microCT images as weathering progressed The variation on porosity especially open porosity pore size distribution local thickness and crack orientation showed the propagation and expansion of the pores and microcracks in rock specimens at a pore scale Because every measurement was performed using nondestructive methods the variation on the same specimens can be analyzed continuously The results showed that frost weathering can cause damage to the tracksites This research therefore suggests the construction of a shelter to maintain the temperature of the tracksite and to prevent groundwater seepage This research can be applied to assess the effects of frost weathering at other cultural stone heritage or geological heritage sites

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