What does "S.H. CONCRETE" mean? 1

[kschulte]

We are in the process of analyzing an existing filigree slab. On the exisiting design drawings there is a note point to the top layer with the designation S.H. CONCRETE. Does this mean anything to anyone? The drawings are from the late '70s.

 

[Ron]

Surface Hardened.

 

[Tim76]

Is surface hardening the same thing as when they put hardening powder on the surface of a slab....like in a machine shop?

 

[Ron]

Tim76...yes. I can be in the form of a "dry shake" done at the time of finishing or can be done as a separate hard topping over the base slab.

 

[jheidt2543]

You have read the specifications pretty carefully because there are a wide variety of surface applied hardeners ranging from liquid to dry shake-ons. The costs vary widely too. Dry shake-ons like Master Plate can get very expensive for both material and labor, but have their specialty uses.