Frequently Asked Questions

In This Section

Other Sources for Answers

Search other resources on the ACI website for answers to technical questions

Technical Questions

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



Found 35 FAQs.

Question: Curing and curling of concrete slabs over vapor retarders

Question: When is steam curing used?

Question: What is curing?

Question: What procedure should be followed for standard curing of specimens for strength tests?

Question: Is there any measure of the completeness or adequacy of curing?

Question: What methods are commonly used to ensure sufficient moisture for curing concrete?

Question: How does the temperature influence curing?

Question: How can the effectiveness of curing be measured?

Question: Can the strength gain of concrete that has ceased due to drying out at early ages be restored by...

Question: Does additional curing improve the properties of concrete in other ways than in strength?

Question: Water Curing Mass Concrete Structures

Question: Are any temperature limitations necessary in curing concrete in hot weather?

Question: What is the importance of curing on strength?

Question: Addition of lime in curing tanks

Question: Is storing the specimens on the structure always a satisfactory procedure for estimating in-plac...

Question: What is mass concrete?

Question: Requirements for durable concrete

Question: Heat of hydration and the importance of controlling it

Question: Factors affecting permeability

Question: Advantages of low-density aggregate

Question: What is meant by properly cured concrete?

Question: Curing Cylinders for Acceptance Testing

Question: Low-strength cylinder test results

Question: Estimating in-place concrete strength

Question: Aging of concrete

Question: The effect of pozzolans on shrinkage

Question: Are polymer concrete and polymer-modified concrete used in repairs?

Question: Does the method of molding test specimens affect the test results?

Question: How are properties of concrete in the structure measured?

Question: Popouts or popoffs?

Question: Consolidation of concrete—required or not?

Question: How to Control Mass Concrete Temperature during Construction

Question: Factors governing the strength of concrete

Question: What test conditions affect the results of compressive strength tests of concrete?

Question: Curing Test Specimen at High Temperatures