Title:
Concrete Q&A: Concrete Placement for Ogee Dam and Tie Spacing Tolerances
Author(s):
Publication:
Concrete International
Volume:
42
Issue:
6
Appears on pages(s):
59-60
Keywords:
DOI:
10.14359/51725922
Date:
6/1/2020
Abstract:
My company has a new project that includes a 10 ft (3 m) tall dam crest wall. In section, one side of the wall is a vertical line and the other side is an ogee curve, so the wall is 2 ft (0.6 m) wide at the top and 12 ft (3.7 m) wide at the bottom. The wall will be formed using a steel gang form in conjunction with a plywood insert to create the ogee shape. We need to avoid honeycombing, and we are concerned that the ogee shape will make it impossible to place internal vibrators near the form face. External vibrators seem like a good alternative, but we have no experience with them. Can you provide any information on the use of this equipment as well as positive and negative experiences?
Related References:
1. ACI Committee 117, “Specification for Tolerances for Concrete Construction and Materials (ACI 117-10) and Commentary (ACI 117R-10) (Reapproved 2015),” American Concrete Institute, Farmington Hills, MI, 2010, 76 pp.
2. ACI Committee 301, “Specifications for Structural Concrete (ACI 301-05),” American Concrete Institute, Farmington Hills, MI, 2005, 49 pp.
3. ACI Committee 301, “Specifications for Structural Concrete (ACI 301-10),” American Concrete Institute, Farmington Hills, MI, 2010, 77 pp.
4. ACI Committee 301, “Specifications for Structural Concrete (ACI 301-16),” American Concrete Institute, Farmington Hills, MI, 2016, 64 pp.