For most interior slabs, the vapor barrier should be placed on top of the subbase before placing the concrete. The best way to know if the subbase is properly compacted and ready for the slab is by proof-rolling, which is running a heavily loaded truck (such as a fully loaded concrete...
A vapor and termite barrier and method for use in concrete slab construction includes applying an elastomeric-seal fluid in a liquid state that cures into an elastomeric seal of all ground surface, reinforcement, conduits and concrete on a slab area. A method for applying the elastomeric-seal ...
slab. Expansion joints are gener- ally not needed. Moistening: Before placing concrete, wet the forms and the subgrade. Do not make the subgrade so wet that it’s muddy. Placement of the vapor barrier should adhere to local code re- quirements. Placing Adding water can be done at the ...
Section includes cast-in-place concrete, including formwork, reinforcement, concrete materials, mix design, placement procedures, and finishes. B. Related Sections include the following: 1. Division 1 Section “Concrete Moisture Vapor Emission and Alkalinity Testing” for moisture vapor emission and ...
Checking the vapor barrier and reinforcing steel before concrete delivery. Are all the seams in the vapor barrier properly sealed? Is the rebar consistently tied on 18-inch centers and uniformly lifted and chaired in position in the middle of the slab?
Low spots are exactly what they sound like, and they will affect drainage and serviceability of the slab. They are generally caused by poor forms and poor screeding, overly wet concrete, poor lighting during placement and finishing, and poor placement and finishing. ...
—the creation and maintaining of a shallow pond of water on the surface of a concrete slab to assist curing; accidental or incidental occurrence of a shallow pond or ponds on a nominally flat surface of concrete; a condition in which a horizontal slab deforms downward between supports. ...
Externally bonded fiber-reinforced polymers (FRP) strips were considered as a retrofitting solution as well; however, the load distribution within the slab would require a high material effort due to the necessarily small spacing of the strips. In addition, measures for securing the compound of ...
vapor barrier- A moisture-impervious material, such as plastic sheeting, placed on the subbase under a concrete slab to help preventmoisture vapor transmission. vertical stamped concrete- A decorative finish for walls and other vertical surfaces using a lightweightcementitiousoverlay formulated to be ...
From what I can tell from a state DNR fax, they recommend placing TWO layers of 4-mil vapor barrier underneath the concrete ramp.I understand the purpose for a vapor barrier inside a stucture but what is the purpose of this on an exterior slab?? Any idea what the DNR is thinking??