Technical Questions

Question: What is mass concrete?

Question: Consolidation of concrete—required or not?

Question: How should the concrete be consolidated to obtain a complete filling of the forms and around the...

Question: Heat of hydration and the importance of controlling it

Question: Would adding more cement serve the purpose of admixtures?

Question: How to Control Mass Concrete Temperature during Construction

Question: What does ACI recommend regarding water-cement (w/c) ratios or admixtures to improve workability...

Question: Requirements for durable concrete

Question: Popouts or popoffs?

Question: Definition of concrete, hydraulic cement, mortar, and grout

Question: Does incorporating fiber as an alternative to traditional reinforcement enhance the environmenta...

Question: How can segregation of the concrete between the mixer and its final point of placement be prevented?

Question: How is concrete consolidated?

Question: How do fibers affect the workability of concrete? Do fibers require additional water for placement?

Question: How can it be determined that an admixture will serve its intended purpose?

Question: What is the purpose of finishing and texturing concrete surfaces?

Question: Resistance to cycles of freezing and thawing

Question: How can the effectiveness of curing be measured?

Question: How is the selection of mixture proportions affected by the materials to be used and the placing...

Question: What consideration should be given to water that may be lost from concrete between the time it l...

Question: Why is consolidation needed?

Question: Does over-vibration cause segregation and loss of air content?

Question: Could a sulfate-resisting cement and slag cement be combined and used for concrete exposed to su...

Question: Curling, shrinkage, and w/cm

Question: Factors affecting time of setting

Question: Why is a plastic consistency usually desirable for placing concrete?

Question: Using cube tests in lieu of cylinder tests

Question: How is workability measured and specified?

Question: How should the appropriate fiber be selected for a specific application, and how is fiber dosage...

Question: Do some water-reducing admixtures induce bleeding?

Question: Evaluating the properties of hardened concrete

Question: Measurement of setting time

Question: Requirements for storing and handling aggregate

Question: What water-cementitious material ratio should be used for a particular job when strength require...

Question: What factors affect the mixing time?

Question: What is curing?

Question: What is the difference between corrected and uncorrected weight in a concrete mix design?

Question: Why might fibers “ball up” in concrete mixes?

Question: How is the water-cementitious material ratio (w/cm) expressed?

Question: What methods are used for protecting concrete against low temperatures?

Question: How should the aggregates and other ingredients be measured to obtain uniformity in proportions?

Question: What are the essential requirements of consistency?

Question: How does the temperature influence curing?

Question: Will concrete continue to increase in strength if there is no moisture present?

Question: What is D-cracking?

Question: What is calcium-aluminate cement?