ACI 547R

Scope of report

Refractory concrete is concrete suitable for use at temperatures up to about 3400 F (1870 C). It consi of a graded refractory aggregate bound by a suitable cementing medium. This report is concerned with refractory concrete in which the binding agent is a hydraulic cement, and does not consider concretes which use waterglass (sodium silicate), phosphoric acid, or phosphates as a principal cementing agent. It covers all facets of refractory concrete installation and use, including the properties of individual ingredients and concretes, placing techniques, methods of curing and firing, repair procedures, construction details, and current and future applications.