Preparation and performance study of prestressed duct grouting material based on waste stone powder
In order to solve the problem of resource reuse of waste stone powder(WSP)in the production process of manufactured sand,prestressed duct grouting material was prepared by using WSP.The effects of single addition of WSP,compound addition of WSP and fly ash or microbeads on the flowability,compressive strength,and flexural strength of prestressed duct grouting material were studied.The results show that when the WSP is added alone or in combination with fly ash,the flowability and flexural strength of the prestressed duct grouting material do not meet the requirements of the specifications.When adding appropriate content of WSP and microbeads,the workability and mechanical properties of the prestressed duct grouting material meet the requirements of the specifications.Among them,when the content of WSP and microbeads is 32%and 45 g,respectively,the performance and economy of the prestressed duct grouting material are relatively optimal,and this plan can be given priority consideration in prestressed concrete bridge engineering.
Prestressed concrete bridge engineeringPrestressed duct grouting materialWaste stone powderWorkabilityMechanical property