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Which of the following cements contains maximum percentage of dicalcium silicate?
- a)ordinary Portland cement
- b)low heat cement
- c)rapid hardening cement
- d)sulphate resisting cement
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Which of the following cements contains maximum percentage of dicalciu...
Low heat cement: This cement is manufactured by reducing the proportion of C3A and C3S and increasing the proportion of C2S. This cement shows low rate of development of strength. It contains 46% of dicalcium silicate.
Note: Whereas in Rapid hardening cement (which is formed by increasing the percentage of C3S and decreasing the percentage of C2S) contains only (9-10)% of C2S. For OPC C2S is generally 15%.
Most Upvoted Answer
Which of the following cements contains maximum percentage of dicalciu...
Low heat cement contains the maximum percentage of dicalcium silicate.
Explanation:
Low heat cement is a type of cement that is specially designed to generate less heat during the hydration process. It is primarily used in large concrete structures to prevent the risk of thermal cracking.
Dicalcium silicate (C2S) is one of the main compounds present in cement, along with tricalcium silicate (C3S), tricalcium aluminate (C3A), and tetracalcium alumino ferrite (C4AF). C2S is responsible for the initial setting and early strength development of cement.
The composition of various cement types differs in terms of the percentage of these compounds. Among the options given, low heat cement contains the maximum percentage of dicalcium silicate (C2S).
Comparison of Cement Types:
Let's briefly compare the composition of the different cement types mentioned in the options:
1. Ordinary Portland Cement (OPC):
- Contains approximately 20-25% C2S.
- It is the most common type of cement used in construction.
2. Low Heat Cement:
- Contains a higher percentage of C2S compared to OPC.
- Typically contains around 30-35% C2S.
- The increased amount of C2S helps in reducing the heat of hydration.
3. Rapid Hardening Cement:
- Contains a lower percentage of C2S compared to OPC.
- Typically contains around 20-25% C2S.
- Designed to achieve higher early strength development.
4. Sulphate Resisting Cement:
- Contains a similar percentage of C2S as OPC.
- Typically contains around 20-25% C2S.
- Specifically formulated to resist the damaging effects of sulfates.
Conclusion:
Low heat cement contains the maximum percentage of dicalcium silicate (C2S) among the given options. The higher percentage of C2S in low heat cement helps in reducing the heat generated during the hydration process, making it suitable for large concrete structures.
Explanation:
Low heat cement is a type of cement that is specially designed to generate less heat during the hydration process. It is primarily used in large concrete structures to prevent the risk of thermal cracking.
Dicalcium silicate (C2S) is one of the main compounds present in cement, along with tricalcium silicate (C3S), tricalcium aluminate (C3A), and tetracalcium alumino ferrite (C4AF). C2S is responsible for the initial setting and early strength development of cement.
The composition of various cement types differs in terms of the percentage of these compounds. Among the options given, low heat cement contains the maximum percentage of dicalcium silicate (C2S).
Comparison of Cement Types:
Let's briefly compare the composition of the different cement types mentioned in the options:
1. Ordinary Portland Cement (OPC):
- Contains approximately 20-25% C2S.
- It is the most common type of cement used in construction.
2. Low Heat Cement:
- Contains a higher percentage of C2S compared to OPC.
- Typically contains around 30-35% C2S.
- The increased amount of C2S helps in reducing the heat of hydration.
3. Rapid Hardening Cement:
- Contains a lower percentage of C2S compared to OPC.
- Typically contains around 20-25% C2S.
- Designed to achieve higher early strength development.
4. Sulphate Resisting Cement:
- Contains a similar percentage of C2S as OPC.
- Typically contains around 20-25% C2S.
- Specifically formulated to resist the damaging effects of sulfates.
Conclusion:
Low heat cement contains the maximum percentage of dicalcium silicate (C2S) among the given options. The higher percentage of C2S in low heat cement helps in reducing the heat generated during the hydration process, making it suitable for large concrete structures.
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Which of the following cements contains maximum percentage of dicalcium silicate?a)ordinary Portland cementb)low heat cementc)rapid hardening cementd)sulphate resisting cementCorrect answer is option 'B'. Can you explain this answer?
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