不同粉煤灰取代率再生混凝土黏结性能试验研究

Experimental study on recycled concrete bonding performance of different fly ash replacement rate

由于再生混凝土在环保、经济上产生的巨大效应,对它的研究已成为一个热点。用粉煤灰取代部分水泥的再生混凝土是开发绿色高性能混凝土的又一条新途径。在再生骨料取代率为100%的基础上,合理设计配合比,通过拉拔试验,对不同粉煤灰取代率的再生混凝土黏结强度进行对比研究。结果表明,掺加适量的粉煤灰可以改善混凝土的黏结性能,减弱黏结滑移破坏的可能性。

Because of the great effect the recycle concrete being made in the environmental protection and economy, studies on recycle concrete are becoming the hotspots.Replacing parts of the cement by fly ash is a new way to develop eco-friendly and high-performance concrete.Basing on the 100% recycled aggregate replacement rate,by designing mixing proportion rationally and using pullout test,it was to contrast and study the bond strength of recycled aggregate concrete of different fly ash replacement rate.The results indicated that adding fly ash in moderation not only improved the adhesive properties of concrete but also reduced the bond slip the possibility of damage.