Bissoy.com
Doctors Medicines MCQs Q&A

Gypsum is added to cement clinker to

Gypsum is added to cement clinker to Correct Answer Decrease the rate of setting of cement

Option A: Increase the tensile strength of cement:
This statement is incorrect. Gypsum is not added to cement clinker to increase its tensile strength. Tensile strength is the ability of a material to withstand pulling or stretching forces.

Option B: Decrease the rate of setting of cement:
This statement is correct. Gypsum is added to cement clinker to control the setting time of cement. It acts as a retarder, slowing down the rate at which the cement mixture hardens. This is important for allowing enough time for proper mixing, placing, and finishing of the cement before it sets.

Option C: Facilitate the formation of colloidal gel:
This statement is incorrect. Gypsum does not facilitate the formation of a colloidal gel. Colloidal gels are formed through different processes and materials.

Option D: Bind the particles of calcium silicate:
This statement is incorrect. Gypsum is not added to bind the particles of calcium silicate. The main component of cement clinker is calcium silicate, and gypsum is added for a different purpose, as explained in Option B.

In summary, gypsum is added to cement clinker to decrease the rate of setting, which allows for better handling and working of the cement mixture before it hardens. This ensures that the cement can be properly placed and finished in construction applications.

Related Questions

A shopkeeper earns a profit of 15% if he mixes 85 kg of A-type cement with 35 kg of B-type cement and sells the mixture at Rs. 46 per kg. He can increase his profit to 25% if he mixes 65 kg of A-type cement with 35 kg of B-type cement and sells the mixture at Rs. 46.5 per kg. At what price should he sell a mixture of 30 kg A-type cement and 50 kg B-type cement to earn a profit of 75%?
Pilot plant for cement clinker developed by Fuller company, had capacity of _________ tons clinker/day?
A construction company purchases cement at the rate of Rs. 1,000 per tonne and stores it at Rs. 100 per tonne. It is perceived that in the coming month, the price of cement will rise by Rs. 2,000 per tonne. The company already has 500 tonnes of cement. If the cement usage during a month is 1,000 tonnes, how much cement should the company purchase this month to minimize its expense in the next one?
Consider the following statements: 1) Hydrophobic cement grains possess the low wetting ability 2) Rapid-hardening cement is useful in concreting under static, or running water 3) Quick-setting cement helps the concrete to attain high strength in the initial period 4) White cement is just a variety of ordinary cement-free of coloring oxides. Which of the above statements are correct?
Consider the following statements regarding 'setting of cement': 1. Low-heat cement sets faster than OPC. 2. Final setting time decides the strength of cement. 3. Initial setting time of Portland PozzoIlona is 30 minutes. 4. Air-induced setting is observed when stored under damp conditions. 5. Addition of gypsum retards the setting time. Which of the above statements are correct?
Which one of the following cement is made by inter-grinding Portland cement clinker and granulated blast furnace slag?
Assertion A : For identical strength, a composite cement-lime mortar is preferred over cement mortar.Reason R : Composite cement-lime mortar has higher drying shrinkage than cement mortar.Select your answer based on the codes given below. Codes:
A mixture comprising of 50% concrete, 30% cement and 20% sand was made. More cement was added in 60 kg of mixture in order to obtain a new mixture with 5/12 part of cement. The sand present in new mixture is what part of the new mixture?
The specific gravity of gypsum mineral is 2.4. If the density of a gypsum core is 2100 kg/m3, the porosity of that core is
Gypsum Requirement of gypsum is