Title: Concrete Q&A: Cover Requirements for Pipes and Ducts in Concrete and Cement Requirements for Exposure Class S2
Publication: Concrete International
Appears on pages(s): 68
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 18.104.22.168 in ACI 318-19,1 a Type V cement is required for Exposure Class S2, while footnote  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%?