Bissoy.com
Doctors Medicines MCQs Q&A

The final setting time of high alumina cement is about _______

The final setting time of high alumina cement is about _______ Correct Answer 5 hours

The final setting time of high alumina cement is about 5 hours. The setting action of this cement mainly depends on the chemical reactions and therefore it is not essential to grind it to a fine powder. Great amount of heat is evolved during setting.

Related Questions

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?
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?
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%?
Consider the following statements : (1) Tests on cement paste to determine initial and final setting times are done at 0.85 times normal consistency conditions. (2) Low heat cement has a high percentage of tri-calcium aluminate. (3) High early strength Portland cement contains a large percentage of tricalcium silicate and lower percentage of dicalcium silicate. Which of these statements are correct ?
The total alumina content in high alumina cement should not be less than _______
The following information related to ordinary portland cement is available. a) Initial setting time - 30 min, b) Final setting time - 10 hours c) Cement water combination action - 10% So which of the following statements is true?
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?
Maximum alumina content in high alumina refractory can be as high as __________ percent.
Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent.
Which of the following pairs are correctly related for rapid hardening cement? 1. Fineness: 10% 2. Final setting time: 10 hours 3. Initial setting time: 30 minutes The correct answer is