Question

Match List-1 (Type of cement) with List-2 (Property) and select the correct answer using the codes given below the lists:
List-1
A. Blast furnace slag cement
B. High alumina cement
C. Low heat cement
D. White cement

List-2
1. High percentage of tricalcium silicate
2. Initial setting is approximately three and a half hours
3. Low percentage of iron oxide
4. Rate of hardening is low

• A. A-4, B-3, C-1, D-2
• B. A-1, B-3, C-4, D-2
• C. A-1, B-2, C-4, D-3
• D. A-4, B-2, C-1, D-3

Answer 1

The correct option is C A-1, B-2, C-4, D-3

Blast furnace slag cement has a high percentage of $C_{3}S$. It is less reactive than OPC and gains strength slowly during the first 28 days. Low heat cement's rate of hardening is low and has low content of $C_{3}S$ and $C_{3}A$. High alumina cement has an initial setting time of about 3.5 hours and final setting time of about 5 to 5.5 hours. White cement has a low percentage of iron oxide (Iron oxide gives grey colour to OPC).