趙小明1,王新科2,喬宏霞2,黃 瑞1
趙小明,王新科,喬宏霞,等. PVA纖維混凝土凍融循環損傷規律及模型研究[J].混凝土與水泥制品,2022(1):53-57.
ZHAO X M,WANG X K,QIAO H X,et al.Study on Freeze-thaw Cycle Damage Law and Model of PVA Fiber Reinforced Concrete[J].China Concrete and Cement Products,2022(1):53-57.
PVA纖維混凝土凍融循環損傷規律及模型研究
趙小明1,王新科2,喬宏霞2,黃 瑞1
趙小明,王新科,喬宏霞,等. PVA纖維混凝土凍融循環損傷規律及模型研究[J].混凝土與水泥制品,2022(1):53-57.
ZHAO X M,WANG X K,QIAO H X,et al.Study on Freeze-thaw Cycle Damage Law and Model of PVA Fiber Reinforced Concrete[J].China Concrete and Cement Products,2022(1):53-57.
摘 要:研究了PVA纖維的體積摻量(0.05%、0.10%、0.15%)和長度(8 mm、12 mm)對混凝土相對動彈性模量、質量損失率和力學性能的影響,分析了PVA纖維混凝土的凍融損傷規律,建立了以相對動彈性模量為對象的Weibull概率分布損傷模型。結果表明:隨著凍融循環次數的增加,體積摻量為0.10%、長度為8 mm的PVA纖維對混凝土抗凍性能的提升效果最好;建立的Weibull概率分布損傷模型可以有效反映PVA纖維混凝土的凍融損傷劣化規律,可為實際工程應用提供參考。
Abstract: The effects of PVA fiber volume content (0.05%, 0.10%, 0.15%) and length (8 mm, 12 mm) on the relative dynamic elastic modulus, mass loss rate and mechanical properties of concrete were studied, and the freeze-thaw damage law of PVA fiber reinforced concrete was analyzed, and the Weibull probability distribution damage model based on the relative dynamic elastic modulus was established. The results show that with the increase of freeze-thaw cycles, PVA fiber with volume content of 0.10% and length of 8 mm has the best effect on improving the frost resistance of concrete. The established Weibull probability distribution damage model can effectively reflect the freeze-thaw damage and deterioration law of PVA fiber reinforced concrete, and can provide a reference for practical engineering applications.
版權所有:中國混凝土與水泥制品網 蘇ICP備10086386號 網站建設:中企動力 蘇州