How does shotcrete bond to my existing structure? Are bonding or adhesive agents needed to ensure a long-lasting remedy?

When the existing concrete structure is properly chipped or prepped, the newly applied shotcrete adheres easily to the concrete structure due to the force of the pneumatic application, small particle size used in the aggregate, and lower water-cement ratio. The shotcrete enters the pores of the chipped concrete and “grabs” on well. No bonding or adhesive agents are necessary or recommended.