WISCONSIN FIELD OFFICE TECHNICAL GUIDE
450-11-TECHNICAL GUIDE
FOTG NOTICE WI-79
SUBJECT: WISCONSIN FIELD OFFICE TECHNICAL GUIDE
Purpose. Revisions to Wisconsin Conservation Practice Standards and Specifications
Explanation of Changes.
Section IV: Conservation Practice Standards and Specifications:
Concrete (WCS 4) – Current changes include the following:
- Design of the Concrete Mix
o Modified to bullet formatting
o Removed reference to any minimum compressive strength in the specification.
o Modified design slump to a maximum not to exceed 5 inches with water reducers.
o Modified design slump language to a maximum not to exceed 8 inches with super-plasticizer.
- Mixing
o Allowed for additional water above the design mix, but not to exceed 0.45 at any time, including the addition of water at the site.
- Placing, Consolidating, and Finishing Concrete
o Added requirement for daily data including: The ambient temperature, relative humidity, and wind velocity when concrete is placed.
- Placement
o Modified language of the slump of placed concrete to a maximum not to exceed 5 inches with the use of water reducers.
- (i.e. no placement of concrete over 5 inch slump. ASTM C-94 tolerance is 5 inches and less)
o The slump of the placed concrete shall not exceed the maximum slump of 8 inches with the use of super-plasticizer.
- Editorial Changes for Clarification
The following revisions to the Wisconsin FOTG have been posted on the Wisconsin e-FOTG website:
Remove the following outdated Standards and Specifications from any printed copies of the WI FOTG:
- Index
- Concrete (WCS 4)
Add the following Standards and Specifications to any printed copies of the WI FOTG:
- Index
- Concrete (WCS 4)
A link to the Wisconsin FOTG is located on the Wisconsin NRCS website at:
http://www.nrcs.usda.gov/wps/portal/nrcs/main/national/technical/fotg/
/S/
JIMMY BRAMBLETT
State Conservationist