Technical Questions

ACI Committees, Membership, and Staff have answered common questions on a variety of concrete related topics.



When heated enclosures are used to protect freshly placed concrete, what precautions are necessary?

Q. When heated enclosures are used to protect freshly placed concrete, what precautions are necessary?

 

A. It is most important to maintain a high humidity. When combustion heaters are used to supply heat, good ventilation, as well as an ample supply of moisture, are needed as the carbon dioxide will cause the new concrete surface to become carbonated (AC1 306R).

 

References: SP-1(02); ACI 306R-16; ACI 306.1-90

Topics in Concrete: Cold Weather; Concrete Fundamentals; Placing

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