CEMENT MORTAR, HYDRATION

1. Which of the following doesn't belong to Bogue compounds?

• Tricalcium silicate

• Dicalcium silicate

• Calcium sulfate dihydrate

• Tetracalcium aluminoferrite

2. Most of the heat liberated during Hydration of Portland Cement is contributed by

• Tricalcium silicate

• Dicalcium silicate

• Calcium sulfate dihydrate

• Tricalcium aluminate

3. Early strength of OPC is contributed by

• Tricalcium silicate

• Dicalcium silicate

• Calcium sulfate dihydrate

• Tricalcium aluminate

4. "Finely ground cements will hydrate more rapidly, but they give rise to higher rates of heat liberation during hydration."

• True

• false

5. What are the types of cement mortar.?

• TYPE K MORTAR

• TYPE M MORTAR

• TYPE L MORTAR

• TYPE P MORTAR

6.Type S mortar compressive strength ranges from

• 13 to 20 Mpa

• 8 to 13 Mpa

• 10 to 16 Mpa

• 13 to 18 Mpa

7. Type M mortar compressive strength ranges from

• 8 to 13 Mpa

• 13 to 21 Mpa

• 10 to 16 Mpa

• 13 to 18 Mpa

8.The first used Mortar was:

• a) Lime mortar

• b) Mud mortar

• c) Cement mortar

• d) Organic mortar

9.The sand in mortar

• a) prevents shrinkage

• b) spreads mortar

• c) allows carbondioxide from the atmosphere to penetrate deeply

• d) all the above