Grout instead of Concrete
Grout instead of Concrete
(OP)
Has anyone ever replaced concrete with grout for an elevated slab? Contractor on my project did. Said his grout hog couldn't pump concrete..aggregate too big. The application is a stair landing in a stair tower. The design called for 5" thick concrete slab spanning 7.5'. 2" metal deck form was used. He used 5000 psi grout when 3500 psi concrete was specified. I don't think it will be a problem, but am not 100% sure. Seems more expensive. What if it was masonry grout?






RE: Grout instead of Concrete
RE: Grout instead of Concrete
RE: Grout instead of Concrete
RE: Grout instead of Concrete
RE: Grout instead of Concrete
RE: Grout instead of Concrete
csd
RE: Grout instead of Concrete
The sampling and testing procedures for concrete are different than for for grout.
5000 psi grout in a concrete cylinder form may not test 3500 psi because of the sample preparation and curing conditions. Shrinkage will be much greater because of the greater cement content and the excess water that cannot be absorbed by surrounding materials.
Apparently, the contractor did not have the appropriate equipment or did not chose to make it work for the specified application.
Dick
RE: Grout instead of Concrete