Experimental Study Regarding the Strength and Drying Shrinkage of the Light-Weight Concrete that Used the Lapilli

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  • 火山礫を利用した軽量コンクリートの強度・乾燥収縮性状に関する実験的研究
  • カザンレキ オ リヨウシタ ケイリョウ コンクリート ノ キョウド カンソウ シュウシュク セイジョウ ニ カンスル ジッケンテキ ケンキュウ

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Abstract

This study was carried out to examine the properties and the durability of light-weight concrete which used lapilli. As a result, it was made clear that stable compressive strength of 24N/mm2 was provided by making 50% of lapilli by volume ratio. However, Lapilli are materials of the high absorption that is many apertures quality. As for the concrete using lapilli, progress of hardening of concrete and drying shrinkage are thought about enough. Therefore I decided to mix steel fiber as an improvement method here. The steel fiber mixture stabilizes the strength and durability property, and furthermore it seemed that I can expect it for expression of flexural toughness and restraint of drying shrinkage. As for the result, drying shrinkage and water loss are relatively similar to lightweight concrete II at 50% of lapilli by volume, steel fiber mixture ratio 1.5%, it may be said that the use of 50% of lapilli by volume is possible enough from a strength property.

Journal

  • Journal of MMIJ

    Journal of MMIJ 127 (1), 46-51, 2010

    The Mining and Materials Processing Institute of Japan

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