Intro to Concrete Repair
Hoffman Architects has published an excellent introduction to repair, including the common causes and solutions to deteriorating concrete.
ICRI Repair Guidelines
The International Concrete Repair Institute is a resource for contractors and designers facing challenging structural repairs. They've developed industry standards for a number of concrete repair methods, including a standard guide for surface preparation (CSP).
Material Selection Chart
With so many variables for your repair (vertical vs horizontal, full depth vs. partial depth, etc) this handy guide from Euclid Chemical can ensure that you're picking the right material for your project.