Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > Gypsum is typically added in cement to a)enha...
Start Learning for Free
Gypsum is typically added in cement to
- a)enhance hardness
- b)increase workability
- c)decrease heat of hydration
- d)prevent quick setting
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Gypsum is typically added in cement to a)enhance hardness b)increase w...
Gypsum is typically added in cement to prevent quick setting.
Explanation:
Gypsum is a mineral composed of calcium sulfate dihydrate (CaSO4·2H2O). It is commonly added to cement during the grinding process to control the setting time of the cement.
1. Setting of Cement:
Setting of cement refers to the process of changing from a plastic state to a solid state. During this process, the cement paste gradually hardens and gains strength. The setting time of cement is influenced by various factors.
2. Quick Setting:
Quick setting refers to the rapid hardening and setting of cement, which occurs within a short period of time. This can be undesirable in many construction applications as it reduces the workability and handling time of the cement.
3. Role of Gypsum:
Gypsum is added to cement as a retarder, which slows down the setting time of the cement. It reacts with the tricalcium aluminate (C3A) present in cement to form calcium sulfoaluminate hydrate, which has a slower rate of reaction compared to the hydration of C3A alone.
- Retarding Effect: Gypsum acts as a retarding agent, delaying the hydration of C3A and preventing quick setting of cement.
- Extended Workability: By retarding the setting time, gypsum provides extended workability to the cement. This allows sufficient time for mixing, placing, and finishing operations.
- Improved Strength Development: The slower hydration of C3A due to the presence of gypsum allows for improved strength development over time.
4. Heat of Hydration:
Although not the primary purpose of adding gypsum, it also has a slight effect on reducing the heat of hydration of cement. Heat of hydration refers to the heat released during the chemical reaction between cement and water. Gypsum can help in reducing the peak temperature rise during hydration.
Conclusion:
In conclusion, gypsum is added to cement to prevent quick setting and provide extended workability. It acts as a retarding agent and improves the strength development of cement over time. Although not the main purpose, it also helps in reducing the heat of hydration.
Free Test
FREE
| Start Free Test |
Community Answer
Gypsum is typically added in cement to a)enhance hardness b)increase w...
Gypsum is added in cement to prevent quick setting.
Hence, the correct option is (D).
Hence, the correct option is (D).
Attention Civil Engineering (CE) Students!
To make sure you are not studying endlessly, EduRev has designed Civil Engineering (CE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Civil Engineering (CE).
|
Explore Courses for Civil Engineering (CE) exam
|
|
Similar Civil Engineering (CE) Doubts
Top Courses for Civil Engineering (CE)View all
Gypsum is typically added in cement to a)enhance hardness b)increase workability c)decrease heat of hydration d)prevent quick settingCorrect answer is option 'D'. Can you explain this answer?
Question Description
Gypsum is typically added in cement to a)enhance hardness b)increase workability c)decrease heat of hydration d)prevent quick settingCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Gypsum is typically added in cement to a)enhance hardness b)increase workability c)decrease heat of hydration d)prevent quick settingCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Gypsum is typically added in cement to a)enhance hardness b)increase workability c)decrease heat of hydration d)prevent quick settingCorrect answer is option 'D'. Can you explain this answer?.
Gypsum is typically added in cement to a)enhance hardness b)increase workability c)decrease heat of hydration d)prevent quick settingCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Gypsum is typically added in cement to a)enhance hardness b)increase workability c)decrease heat of hydration d)prevent quick settingCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Gypsum is typically added in cement to a)enhance hardness b)increase workability c)decrease heat of hydration d)prevent quick settingCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Gypsum is typically added in cement to a)enhance hardness b)increase workability c)decrease heat of hydration d)prevent quick settingCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Civil Engineering (CE).
Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free.
Here you can find the meaning of Gypsum is typically added in cement to a)enhance hardness b)increase workability c)decrease heat of hydration d)prevent quick settingCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Gypsum is typically added in cement to a)enhance hardness b)increase workability c)decrease heat of hydration d)prevent quick settingCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Gypsum is typically added in cement to a)enhance hardness b)increase workability c)decrease heat of hydration d)prevent quick settingCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Gypsum is typically added in cement to a)enhance hardness b)increase workability c)decrease heat of hydration d)prevent quick settingCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Gypsum is typically added in cement to a)enhance hardness b)increase workability c)decrease heat of hydration d)prevent quick settingCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Civil Engineering (CE) tests.
|
|
Explore Courses for Civil Engineering (CE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup