高分子量ポリエチレン繊緎を用いた繊緎補強コンクリートの靭性確保を目的とした調合とその基礱物性に関する実騳的研究

摘要

This study aimed at developing polyethylene fiber-reinforced concrete (PEFRC) with high flexural toughness and sufficient slump for precast concrete. Experimental investigations were conducted regarding influences of mix proportion of matrix, fiber volume fraction, and shape of short fiber on slump and various mechanical characteristics of the PEFRC. As a result, PEFRC with more than 40 kN-mm in flexural toughness and 10 cm in slump could be derived, due to applying high-fluidity matrix and loosely bundled short fiber to the PEFRC. Moreover, it was shown that the PEFRC possessed generally good mechanical characteristics and durability as compared with steel fiber-reinforced concrete and plain concrete, respectively.%紡糸技術の発展に支えられ，従来の合成繊維が有する軽量性・耐 食性といった特性に加えて，引張強度等の力学的性能を大きく向上 させた新素材合成繊維の開発が盛んに進められており，そのコンク リート補強用繊維としての有効利用と，それに伴う鉄筋コンクリー ト構造物の性能向上が期待されている。