The utilization rate of construction waste and industrial waste fly ash in the project is low.In order to maximize the utilization rate of construction waste and fly ash,20%,40%,60%,80%,100%of recycled aggregate and 0,10%,15%,20%of fly ash are used to replace natural aggregate and cement to make fly ash recycled concrete.The mechanical properties of fly ash recycled concrete under different replacement rates are explored.In order to better analyze the influencing factors of the mechanical properties of recycled concrete,an ideal recycled concrete damage model was established and compared with the test data.It was found that the strength of the test block had a great correlation with the performance of its own recycled aggregate.The stress-strain curve was drawn,and the replacement rate of recycled bone material and fly ash was combined to analyze.Finally,it was concluded that the replacement rate of fly ash in recycled concrete was negatively related to the bearing capacity.It is positively correlated with peak strain change and slump.After microscopic analysis,the macroscopic measured data and cause analysis of the slump and compressive strength of the test block are verified.
万方数据