Podcast
Questions and Answers
What substances are present in the mixture of cement?
What substances are present in the mixture of cement?
- Iron, calcium, silica, and alumina
- Water, aggregate, admixtures, and fly ash
- Calcareous, siliceous, argillaceous, and other substances (correct)
- Limestone, sand, clay, and gypsum
Which type of cement is manufactured from natural stones by burning and then crushing to powder?
Which type of cement is manufactured from natural stones by burning and then crushing to powder?
- Portland cement
- Artificial cement
- Composite cement
- Natural cement (correct)
What is added to delay the setting action of artificial cement?
What is added to delay the setting action of artificial cement?
- Silica
- Alumina
- Gypsum (correct)
- Iron
What are the chief chemical components of Portland cement?
What are the chief chemical components of Portland cement?
What contributes to the strength development in the mixture of cement, sand, and aggregate?
What contributes to the strength development in the mixture of cement, sand, and aggregate?
Which cement constituent exhibits the greatest rate of heat liberation within the first few days?
Which cement constituent exhibits the greatest rate of heat liberation within the first few days?
Why is the study and control of hydration important in mass construction (e.g., piers, dams etc.)?
Why is the study and control of hydration important in mass construction (e.g., piers, dams etc.)?
What is the role of ettringite in the context of Portland cement?
What is the role of ettringite in the context of Portland cement?
When does the first heat peak occur during the hydration of Portland cement?
When does the first heat peak occur during the hydration of Portland cement?
What is the reason for the concrete to remain in a plastic state for several hours?
What is the reason for the concrete to remain in a plastic state for several hours?
What is the significance of the rate of heat evolution reaching the second peak after 4 to 8 hours?
What is the significance of the rate of heat evolution reaching the second peak after 4 to 8 hours?
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