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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Tools > Frequently Asked Questions
Question: The effect of joints on the durability of concrete structures
Question: The effect of aggregate on concrete durability
Question: What is mass concrete?
Question: Maximum temperature limits for hot-weather concreting
Question: Knowledge of concrete properties
Question: Requirements for durable concrete
Question: Heat of hydration and the importance of controlling it
Question: What are shrinkage-compensating expansive cement and concrete?
Question: Would adding more cement serve the purpose of admixtures?
Question: What steps are taken in the repair of concrete structures?
Question: Do we always need to repair cracked concrete?
Question: Consolidation of concrete—required or not?
Question: Acceptable concrete cracking
Question: Air tests for non-air-entrained concrete
Question: Evaluating the properties of hardened concrete
Question: Resistance to cycles of freezing and thawing
Question: Factors affecting permeability
Question: The relationship between porosity and permeability of concrete
Question: Other important properties of concrete
Question: The importance of proper drainage
Question: Benefits of using slag cement
Question: Can you use any source of water as mixing water?
Question: Why is combined aggregate grading used?
Question: How can durable aggregates be ensured?
Question: Specialty admixtures
Question: The effect of water-reducing admixtures on drying shrinkage
Question: Commonly used accelerating admixture
Question: Protecting concrete from cycles of freezing and thawing
Question: Precautions against sulfate attack
Question: Precautions to resist acid attack
Question: Improving the abrasion resistance of concrete
Question: Protecting against excessive expansion due to alkali-aggregate reaction (AAR)
Question: How is the selection of mixture proportions affected by the materials to be used and the placing...
Question: The effect of water-cementitious ratio on permeability and shrinkage
Question: How is the resistance to sulfate determined?
Question: How is the resistance to alkali-aggregate reaction (AAR) determined?
Question: How is the abrasion resistance of concrete determined?
Question: How is the shrinkage of concrete determined?
Question: Could a sulfate-resisting cement and slag cement be combined and used for concrete exposed to su...
Question: Popouts or popoffs?
Question: What is D-cracking?
Question: Joint deterioration mechanism and prevention
Question: Epoxy-coated reinforcement and cover depth against ground
Question: Chloride concentration in soil and exposure classes
Search other resources on the ACI website for answers to technical questions