WEATHERING SIMULATION OF FOUR THAI SANDSTONES UNDER DRY, WET AND ACIDIC CONDITIONS
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Abstract
Weathering simulations have been performed on four sandstone types by subjecting them up to 300 heating-cooling cycles. Three cooling conditions are imposed on three separate sets of specimens prepared from each sandstone type: air-cooling, submerging in distilled water and in sulfuric acid (pH = 5.6). Results indicate that all sandstones are insensitive to heating-dry cooling cycles. They are however highly sensitive to water and particularly to acid. Such rapid cooling in liquid induces micro-cracks in the cementing materials, which become preferential paths allowing liquid to penetrate deeper into the specimens. As the cementing materials are dissolved by the liquids, the sandstone density, strength and stiffness decrease as the simulation cycles increase. The findings can be useful for the selection criteria and application of these sandstones in the construction and decoration industry.
Article Details
The published articles are copyright of the Engineering Journal of Research and Development, The Engineering Institute of Thailand Under H.M. The King's Patronage (EIT).
References
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