Experimental study on the mechanical properties of CFB slag fiber mortar
In order to realize the efficient utilization of CFB slag,design the orthogonal test scheme L16(45)to study the mechanical properties of 16 groups of CFB slag fiber mortar.The effects of fly ash volume substitution for cementitious,CFB slag volume substitution for sand,and PVA fiber volume fraction was analyzed and discussed on the 14 d compressive strength,14 d flexural strength,28 d compressive strength and 28 d flexural strength of the ready mixed mortar of CFB slag.The results show that the flexural strength of CFB slag mortar at 14 d and 28 d is the same with the change trend of fly ash volume fraction,CFB slag volume fraction and PVA fiber volume fraction,but the variation trend of compressive strength of CFB slag mortar at 14 d and 28 d is different.Fly ash is a high significant effect of the flexural strength and compressive strength,CFB slag is a significant effect of the 14 d flexural strength and the 14 d compressive strength,and PVA fiber is only an effect of the flexural strength.When the mixing ratio is 10％fly ash,10％CFB slag and 0 PVA fiber,the 14 d flexural strength,28 d flexural strength and 14 d compressive strength of CFB slag fiber mortar are the highest,which are 9.2％,4.3％and 15.5％higher than baseline group respectively,and can be used to prepare the ready mixed mortar of CFB slag.NSGM(1,4)model can be used to simulate and predict the compressive strength and flexural strength of CFB slag fiber mortar.The average relative error of model simulation is 3.914％,and the average relative error of model prediction is 5.304％.
CFB slagPVA fibermechanical propertiesorthogonal testgrey forecasting model
万方数据
维普
