Potential of Mortar as an Experimental Material to Aid in the Understanding of Rock Weathering through Freezing and Thawing

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  • 凍結融解による岩石の風化を理解させるためのモデル実験におけるモルタルの利用可能性
  • トウケツ ユウカイ ニ ヨル ガンセキ ノ フウカ オ リカイ サセル タメ ノ モデル ジッケン ニ オケル モルタル ノ リヨウ カノウセイ

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Abstract

<p>We carried out an educational experiment to test if mortar pieces aid in the understanding of rock weathering through freezing and thawing. We applied pieces of mortar instead of Shikotsu welded tuff, which has been problematic in terms of mechanical strength. We employed two different methods of preparing the mortar pieces: cutting mortar with a diamond cutter, and pouring mortar into a silicon sheet form. Half of the respective mortar pieces were soaked in water. After freezing and thawing of the pieces, we examined their breaking loads. We found that the breaking loads of the wet pieces made with the cutter were indistinguishable from those of the dry pieces. On the other hand, in the case of those mortar pieces made with the silicon sheet form, clear difference were demonstrated between the breaking loads of wet pieces and dry ones. Thus, we concluded that mortar pieces made with a silicon sheet form are fit to use in this experiment.</p>

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