级配再生细骨料及粉煤灰掺量对活性粉末混凝土性能影响

打开文本图片集

WEN Anfei'， ZHANG Zheng2，HUO Zhiqiang2，Nuermaimaiti ？？ ABULIMITI3， YANG Zhengxun2，4 （1. School of Traffic & Logistics Engineering， Xinjiang Agricultural University， Urumqi 83000o，China； 2. Sichuan Vocational and Technical Colege of communications， Chengdu 611130， China； 3.Chengdu University of Technology，Chengdu 61130，China；4.Sichuan Province Transportation Green and Low-carbon Building Materials Engineering Technology Research Center， Chengdu 611130，China） Abstract：With awater-cementratioof0.26andO.28as thebaseofactive powderconcrete，recycled fineaggegateeplaced quartz sand. The effects of dimension value D and 20% ， 25% ， 30% fly ash content on the compressive and folding strength of RPC were studiedand itsmicroscopic morphology observed.Results：RPCflowdegree decreaseswith increasinggraded dimension. The graded dimension value greatly influencesRPC’scompresive and folding strength.Under standard curing， earlycompressiveandfolding strengthdecreases whilelaterstrengthrises.Undernormal temperature maintenance，compresive andfoldingstrengthatdiferentagesincreasewith increasinggradeddimension；With increasingflyash，RPChydration products are basically the same，but the internal microstructure shows a dense -loose trend.

Keywords： recycled fine aggregate；rpc； fractal theory； fly ash；mechanical property

0 引言

我国公路建设快速发展，逐步转向建养并重的阶段。（剩余4984字）