Technical Questions

Question: How is concrete placed?

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

Question: Requirements for durable concrete

Question: Requirements for storing and handling aggregate

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

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

Question: When can the finishing procedure be started?

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

Question: How can the adequacy of mixing be determined?

Question: What factors affect the mixing time?

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

Question: If the cementitious material paste is not sufficient in amount to float all of the aggregate par...

Question: If the paste is ample in amount, but is too thin and watery to float the aggregate particles, wh...

Question: Can you have too much paste or mortar?

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

Question: What are the essential requirements of consistency?