FUNDAMENTAL STUDY ON APPLICABILITY OF CRUSHED OYSTER SHELL AS MATERIALS FOR COMPOSING SUBGRADE

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  • YAMADA Mikio
    社団法人 土木学会 福井工業高等専門学校 環境都市工学科
  • TANIGUCHI Katsuya
    社団法人 土木学会 北川ヒューテック株式会社技術部技術研究所
  • OKUMURA Mitsushi
    社団法人 土木学会 福井工業高等専門学校 環境都市工学科
  • SANO Hiroaki
    社団法人 土木学会 大分工業高等専門学校 土木工学科
  • MIYAMOTO Masaki
    石川県工業試験場化学食品部

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  • 牡蠣殻片の道路路床構築材料としての適用性に関する基礎的研究
  • カキ カクヘン ノ ドウロ ロショウ コウチク ザイリョウ ト シテ ノ テキヨウセイ ニ カンスル キソテキ ケンキュウ

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Abstract

The reusing of oyster shell deposits at the dump yard can be considered as an indispensable work for reducing the amount of wastes and conserving the scenery in the place of production. The objectives of present study are to investigate experimentally the strength and bearing capacity characteristics of stabilized soils containing crushed oyster shell and to clarify its applicability as subgrade materials by exploring test results. The results obtained from laboratory tests indicated that the unconfined compressive strength and CBR value increased in proportion to the stabilizer additive content and curing time. In addition, the coefficient of subgrade reaction and field CBR value converted from the impact acceleration value (Ia) showed that the bearing capacity of improved subgrade increased with an increase in crushed oyster shell content. Based on these results, it may be beneficial to use crushed oyster shell as subgrade materials.

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