Title:
Concrete Q&A:
Author(s):
Publication:
Concrete International
Volume:
37
Issue:
5
Appears on pages(s):
60
Keywords:
DOI:
10.14359/51687836
Date:
5/1/2015
Abstract:
Q. My company is the general contractor on a midrise reinforced concrete building. The owner’s inspector is requiring us to remove concrete splatters on the column and wall dowels before we can install the forms for the next level. I have been in this business for more than four decades, and this is the first inspector that has required this action. We have to use wire brushes and grinders to remove the splatter. The splatter also roughens the bar surface, so I don’t understand how it could negatively affect bond. The inspector has cited ACI 301-101 as justification, specifically quoting Section 3.3.1.1: “reinforcement shall be free of materials deleterious to bond.” Is there a reference we can use to persuade the inspector that splatter is not deleterious to bond?
Related References:
1. ACI Committee 301, “Specifications for Structural Concrete (ACI 301-10),” American Concrete Institute, Farmington Hills, MI, 2010, 77 pp.
2. Taber, L.H.; Belarbi, A.; and Richardson, D.N., “Effect of Reinforcing Bar Contamination on Steel-Concrete Bond During Concrete Construction,” Fifth International Conference on Innovation in Design: Emphasis on Seismic, Wind, and Environmental Loading, Quality Control, and Innovation in Materials/Hot-Weather Concreting, SP-209, V. M. Malhotra, ed., American Concrete Institute, Farmington Hills, MI, 2002, pp. 839-862.
3. ACI Committee 311, “ACI Manual of Concrete Inspection (ACI 311.1R-07),” SP-2(07), American Concrete Institute, Farmington Hills, MI, 2007, 199 pp.
4. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-11) and Commentary,” American Concrete Institute, Farmington Hills, MI, 2011, 503 pp.