May 10 Daily Question: Cement Type and Exposure Category for a Foundation
NCEES Civil PE Specification VII.C.: Concrete
You have been contracted to install a new transformer foundation at a petrochemical facility. A geotechnical report for the site states that all foundations are to be installed at least 3 feet below grade to overcome the soil frost depth. The report also states the soil at site has high sulfur content. What type of cement type and exposure category is most appropriate for the new foundation?
Select an Answer:
Answer: D) Type V, Exposure Categories F & S
Concrete placed in high sulfur environments can be prone to degradation and sulfate attacks. ACI 318 specifies that Cement Type V is to be used for sulfate resistance. Additionally, Exposure Categories F (for freeze/thaw) and S (sulfates) are both applicable in this scenario.