Question: Consolidation of concrete—required or not?

Question: Why is consolidation needed?

Question: How is concrete consolidated?

Question: What is the importance of consolidation on strength?

Question: What consideration should be given to water that may be lost from concrete between the time it leaves the mixer and its final consolidation in the form?

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

Question: How is concrete placed?

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

Question: Factors governing the strength of concrete

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

Question: What nominal maximum sizes of aggregate are recommended?

Question: Can the importance of proper consistency for placing be overemphasized?

Question: What are the essential requirements of consistency?

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

Question: Factors affecting permeability