Title:
Concrete Q&A: Cover Requirements for Pipes and Ducts in Concrete and Cement Requirements for Exposure Class S2
Author(s):
Publication:
Concrete International
Volume:
42
Issue:
9
Appears on pages(s):
68
Keywords:
DOI:
10.14359/51728157
Date:
9/1/2020
Abstract:
Q: Our company was recently awarded the contract to build a post-tensioned parking structure. The construction documents include a typical detail showing that reinforcing bars are to be no closer than 1 in. from embedded pipes, ducts, or sleeves. This requirement creates a constructability challenge. Is it based on technical publications published by ACI? The specified maximum aggregate size is 3/8 in.
Q: According to Table 19.3.2.1 in ACI 318-19,1 a Type V cement is required for Exposure Class S2, while footnote [6] allows the use of a Type I or Type III cement with C3A content of less than 5%. How about a Type II cement if it has a C3A content of less than 5%?
Related References:
1. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary (ACI 318R-19),” American Concrete Institute, Farmington Hills, MI, 2019, 623 pp.
2. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary (ACI 318R-19),” American Concrete Institute, Farmington Hills, MI, 2019, 623 pp.