飛灰混凝土與鋼筋間握裹強度之研究

本研究探討大量摻用飛灰對混凝土與鋼筋間握裹強度之影響。試驗變數主要為混凝土水膠比（0.28～0.72）及飛灰摻量（0%、25%、60%），飛灰為F級。試驗結果顯示，28天齡期時，各式飛灰混凝土與鋼筋間握裹強度比無摻飛灰混凝土高0.8 MPa～2.5 MPa，56天齡期時則高1.7 MPa～3.7 MPa，摻有飛灰之混凝土與鋼筋間握裹強度均超過無摻飛灰者，且隨飛灰摻量及齡期的增加而提升，無論混凝土試體有無圍束作用均有此現象，顯示摻加飛灰確實有助於提升混凝土與鋼筋的握裹強度。

關鍵字

飛灰；混凝土；握裹強度

並列摘要

This study experimentally investigated the improvement of bond strength for concrete incorporating high volume class F fly ash. Concrete mixtures made with 0%, 25% and 60% replacement of cement with fly ash were prepared. Water-cementitious material ratios ranged from 0.28 to 0.72. Test results indicate that, at the age of 28 days, the bond strength for concrete incorporating fly ash is 0.8 MPa ~ 2.5 MPa higher than that of the control specimen, and is 1.7 MPa ~ 3.7 MPa higher at the age of 56 days. The bond strength for concrete incorporating fly ash is higher than those of control specimen, and it increases with the increase of fly ash content and test age. This phenomenon can be found in concrete with and without confinement. It can be sure that adding fly ash in concrete can improve the bond strength for concrete.

並列關鍵字

fly ash ； concrete ； bond strength

參考文獻

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飛灰混凝土與鋼筋間握裹強度之研究

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