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Topics In Concrete

Home > Frequently Asked Questions

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Technical Questions

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

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Question: Standard specifications for cements

Question: What is the difference between synthetic microfibers and macrofibers?

Question: Curing and curling of concrete slabs over vapor retarders

Question: What is an expansive cement and what are the different types of expansive cement?

Question: Characteristics of cement that affect compressive strength

Question: Popouts or popoffs?

Question: Maximum temperature limits for hot-weather concreting

Question: Form release agents

Question: What is minimum reinforcement for crack-width control and how is design accomplished using fiber?

Question: Why are fibers used in concrete?

Question: Are all fibers used in concrete the same?

Question: Will fiber-reinforced concrete have a hairy appearance?