Effect of Recycled Fine Aggregate on Mechanical Properties and Carbonation Durability of High Ductility Cementitious Composites
In order to promote the application of recycled fine aggregate(RFA)in high ductility cementitious composites(HDCC),the effect of RFA replacement rate(0％,25％,50％,75％,100％,mass fraction)on compressive strength,tensile properties,four-point flexural strength and carbonation durability of HDCC was studied.The results show that with the increase of RFA replacement rate,the compressive strength of HDCC decreases gradually,but the tensile properties and flexural strength increase significantly.Under100％RFA replacement rate,the peak strain of HDCC reaches3.06％,and the flexural strength reaches 7.9 MPa,which is 31.33％and 11.27％higher than that of natural fine aggregate HDCC,respectively,showing good ductility.When the replacement rate of RFA is higher than 50％,it is helpful to improve the carbonation durability of HDCC.Based on the fitting of test results,a HDCC carbonation depth prediction model related to RFA replacement rate is established.
high ductility cementitious compositerecycled fine aggregatecompressive strengthtensile propertyflexural strengthcarbonation durability
万方数据
维普
