Grouted Riprap Design for Dams and Revetments 2

I believe that the USACE may have useful resources:

we generally do not advise grouted riprap for these types of critical applications. since it is unreinforced concrete, there is an argument that once it cracks, it fails perhaps more quickly than ungrouted riprap. Relatively minor settlement or seepage pressure will cause cracking of the grout and failure of the revetment.

The Corps only allows it in cases where large rock is not readily available or cost prohibitive. In general, this means rarely if ever. see the following corps document: ETL 1110-2-334 DESIGN AND CONSTRUCTION OF GROUTED RIPRAP

You might be able to use it for less critical applications. FHWA does allow it, but with little guidance.

cvg - Thank you for the input and references. I think you answered my question.