In order to realize the efficient use of CFB slag and improve the crack resistance of ready mixed mortar,the orthogonal table L16(45)is designed based on the replacement amount of fly ash(volume fraction),the replacement amount of CFB slag fine aggregate(volume fraction)and the amount of PVA fiber(volume fraction).The drying shrinkage characteristics of CFB slag fine aggregate fiber mortar are experimentally studied,and the regression model is established through the analysis of the action rules.The results show that in-creasing the replacement amount of fly ash can improve the consistency of CFB slag mortar,while increasing the replacement amount of CFB slag and the content of PVA fiber is not conducive to the improvement of mortar consistency.The replacement amount of fly ash and CFB slag are the most significant factors affecting the drying shrinkage of CFB slag fiber mortar,and the content of PVA fiber is the signif-icant factor.The replacement amount of fly ash and the amount of PVA fiber have an obvious inhibiting effect on the drying shrinkage of CFB slag fiber mortar,and the drying shrinkage of CFB slag fiber mortar shows a trend of decreasing first and then increasing.The relative residual of the model prediction of mortar drying shrinkage is within±5％,and the model prediction results are accurate and reliable.
关键词
CFB炉渣/预拌砂浆/稠度/干燥收缩/回归模型
Key words
CFB slag/ready mixed mortar/consistency/drying shrinkage/regression model
维普
万方数据