- 聶紅賓1,2,谷拴成1,高攀科2,張建鵬3
2020年第5期
摘要
引用本文
摘?要:研究了不同摻量的碳纖維對川藏線極溫凍融環境下混凝土耐久性能的影響。通過快速水凍水融法,測試了川藏-27~40℃極溫循環下碳纖維增強混凝土的抗凍指標,包括相對動彈性模量、質量損失率、失水量。結果表明,隨著凍融循環次數的增加,所有試件的質量損失率在凍融前期變化一致;凍融70次后,隨著碳纖維摻量的增加,質量損失率先減小后增大,摻量為0.24%時的質量損失率最??;相對動彈性模量隨著摻量的增加先增大后減小,且當摻量為0.24%時達到最大;凍融過程中,碳纖維摻量對失水量的影響較小。Abstract:Theeffectofdifferentcontentsofcarbonfibreonthedurabilityofconcreteunderfreeze-thawenvironmentofSichuan-Tibetrailwaylinewasstudied,andtherapidfreeze-thawmethodwasusedtotestthefrostresistanceindexofcarbonfiberreinforcedconcrete(CFRC)at-27~40℃,includingtherelativedynamicelasticmodulus,masslossrateandwaterloss.Theresultsshowthatwiththeincreaseoffreeze-thawcycles,themasslossrateofCFRCwasthesameintheearlystageoffreeze-thaw.Withthecontentofcarbonfiberincreases,themasslossratedecreasesfirstandthenincreases,andthemasslossrateisthesmallestat0.24%contentafter70timesoffreeze-thawcycles.Therelativedynamicelasticmodulusfirstincreasesandthendecreaseswiththeincreaseofthecontentofcarbonfiber,andreachesthemaximumwhenthecontentis0.24%.Duringthefreeze-thawprocess,thecontentofcarbonfiberhaslittleeffectonwaterloss.
聶紅賓,谷拴成,高攀科,等.寒區碳纖維增強混凝土抗凍性能試驗研究[J].混凝土與水泥制品,2020(5):46-50.
NIE H B,GU S C,GAO P K,et al.Experimental Study on the Frost Resistance of Carbon Fiber Reinforced Concrete in Cold Areas[J].China Concrete and Cement Products,2020(5):46-50.