Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > Consider the following statements:High early ...
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Consider the following statements:
High early strength of cement is obtained as a result of
1. Fine grinding
2. decreasing the lime content
3. Burning at higher temperatures
4. Increasing the quantity of gypsum
Of these statements
- a)1 and 2 are correct
- b)1 and 3 are correct
- c)2, 3 and 4 are correct
- d)1, 3 and 4 are correct
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Consider the following statements:High early strength of cement is obt...
High early strength of cement is obtained as a result of:
1. Fine grinding
2. Increasing the lime content
3. Burning at higher temperatures
4. Decreasing the quantity of gypsum.
Basically, C3S is responsilble for the early development of strength in the concrete.
Most Upvoted Answer
Consider the following statements:High early strength of cement is obt...
Answer:
High Early Strength of Cement
High early strength of cement is a desirable property that is useful in situations where quick setting and hardening of concrete is required. This property is obtained as a result of various factors, some of which are discussed below.
Fine Grinding
The fineness of cement influences its early strength development. Fine grinding of cement results in an increase in surface area, which in turn increases the rate of hydration and early strength development.
Burning at Higher Temperatures
Burning of cement at higher temperatures results in the formation of more reactive phases such as C3S (tricalcium silicate) and C3A (tricalcium aluminate). These phases contribute to the early strength development of cement.
Decreasing the Lime Content
Lime (CaO) is one of the major components of cement. However, excess lime can lead to delayed setting and reduced early strength development. Therefore, decreasing the lime content in cement can result in higher early strength.
Increasing the Quantity of Gypsum
Gypsum is added to cement to control the setting time and to prevent flash setting. However, increasing the quantity of gypsum can also result in higher early strength.
Conclusion
Therefore, it can be concluded that fine grinding and burning at higher temperatures are the major factors that contribute to the early strength development of cement. Decreasing the lime content and increasing the quantity of gypsum can also aid in achieving high early strength.
High Early Strength of Cement
High early strength of cement is a desirable property that is useful in situations where quick setting and hardening of concrete is required. This property is obtained as a result of various factors, some of which are discussed below.
Fine Grinding
The fineness of cement influences its early strength development. Fine grinding of cement results in an increase in surface area, which in turn increases the rate of hydration and early strength development.
Burning at Higher Temperatures
Burning of cement at higher temperatures results in the formation of more reactive phases such as C3S (tricalcium silicate) and C3A (tricalcium aluminate). These phases contribute to the early strength development of cement.
Decreasing the Lime Content
Lime (CaO) is one of the major components of cement. However, excess lime can lead to delayed setting and reduced early strength development. Therefore, decreasing the lime content in cement can result in higher early strength.
Increasing the Quantity of Gypsum
Gypsum is added to cement to control the setting time and to prevent flash setting. However, increasing the quantity of gypsum can also result in higher early strength.
Conclusion
Therefore, it can be concluded that fine grinding and burning at higher temperatures are the major factors that contribute to the early strength development of cement. Decreasing the lime content and increasing the quantity of gypsum can also aid in achieving high early strength.
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Consider the following statements:High early strength of cement is obtained as a result of1. Fine grinding2. decreasing the lime content3. Burning at higher temperatures4. Increasing the quantity of gypsumOf these statementsa)1 and 2 are correctb)1 and 3 are correctc)2, 3 and 4 are correctd)1, 3 and 4 are correctCorrect answer is option 'B'. Can you explain this answer?
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