A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
HIGHLY DURABLE BACK-FILLING GROUT MATERIAL
To provide a back-filling grout material having enhanced initial strength in 2 hour material age and having sufficient long-age strength, thereby having excellent durability to repeated loads.SOLUTION: This invention relates to a highly durable back-filling grout material, characterized in that the fiber is a dissociative bundled fiber which is kept in a converged state during dry blend and is defibrated into single fibers after the dry blend. Preferably, the fiber is a dissociative bundled fiber in which, when the fiber is kneaded with the grout material and water to obtain a grout, an aggregation ratio 2 minutes after starting the kneading is 20% or less. In the highly durable back-filling grout material, flow-down time of the grout kneaded in a ratio (W/B) between water and the grout material of 35-65%, measured by JA funnel flow test, is 30 seconds or less; and compression strength in 2 hour material age of the grout after hydration hardening is 2 N/mm2 or more.SELECTED DRAWING: Figure 1
【課題】材齢２時間の初期強度を高めると共に十分な長期強度を有し、繰返し荷重に対する耐久性に優れた裏込めグラウトを提供する。【解決手段】上記繊維は乾式混合においては集束状態を保ち乾式混合後には単繊維に解繊する解離性の集束繊維であることを特徴とする高耐久性裏込めグラウト材であって、好ましくは、上記繊維が、該グラウト材と水を練り混ぜてグラウトにしたときの練り混ぜ開始２分後の凝集率が２０％以下である解離性の集束繊維であり、水グラウト材比（Ｗ／Ｂ）３５〜６５％で練り混ぜたグラウトのＪＡ漏斗試験の流下時間が３０秒以下であり、水和硬化後のグラウトの材齢２時間の圧縮強度が２Ｎ/mm２以上である高耐久性裏込めグラウト材。【選択図】図１
HIGHLY DURABLE BACK-FILLING GROUT MATERIAL
To provide a back-filling grout material having enhanced initial strength in 2 hour material age and having sufficient long-age strength, thereby having excellent durability to repeated loads.SOLUTION: This invention relates to a highly durable back-filling grout material, characterized in that the fiber is a dissociative bundled fiber which is kept in a converged state during dry blend and is defibrated into single fibers after the dry blend. Preferably, the fiber is a dissociative bundled fiber in which, when the fiber is kneaded with the grout material and water to obtain a grout, an aggregation ratio 2 minutes after starting the kneading is 20% or less. In the highly durable back-filling grout material, flow-down time of the grout kneaded in a ratio (W/B) between water and the grout material of 35-65%, measured by JA funnel flow test, is 30 seconds or less; and compression strength in 2 hour material age of the grout after hydration hardening is 2 N/mm2 or more.SELECTED DRAWING: Figure 1
【課題】材齢２時間の初期強度を高めると共に十分な長期強度を有し、繰返し荷重に対する耐久性に優れた裏込めグラウトを提供する。【解決手段】上記繊維は乾式混合においては集束状態を保ち乾式混合後には単繊維に解繊する解離性の集束繊維であることを特徴とする高耐久性裏込めグラウト材であって、好ましくは、上記繊維が、該グラウト材と水を練り混ぜてグラウトにしたときの練り混ぜ開始２分後の凝集率が２０％以下である解離性の集束繊維であり、水グラウト材比（Ｗ／Ｂ）３５〜６５％で練り混ぜたグラウトのＪＡ漏斗試験の流下時間が３０秒以下であり、水和硬化後のグラウトの材齢２時間の圧縮強度が２Ｎ/mm２以上である高耐久性裏込めグラウト材。【選択図】図１
HIGHLY DURABLE BACK-FILLING GROUT MATERIAL
高耐久性裏込めグラウト材
TAHARA HIDEO (author) / TAKAHARA KONOSUKE (author) / KIMOTO DAISUKE (author) / IZU FUTOSHI (author) / FUKUTE TSUTOMU (author) / NISHIDA TAKAHIRO (author) / MOROHASHI KATSUTOSHI (author) / AMAMIYA YOSHIKO (author)
2021-08-30
Patent
Electronic Resource
Japanese
FILLING EVALUATION METHOD OF GROUT MATERIAL AND FILLING EVALUATION MEMBER OF GROUT MATERIAL
| European Patent Office | 2018