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How gypsum effect the setting time of cement?
gypsum increase the setting time of cement.
What is the importance of setting time of cement?
because when we know the setting time of cement we easily identified that where can we use the cement according to there setting time.
What are the factors affecting the initial setting time of cement?
When cement is mixed with water, it forms slurry which gradually becomes less plastic with the passage of time & finally a hard mass is obtained. In this process, at a certain stage when the cement paste is sufficiently rigid to withstand a definite amount of Pressure, it is said to have set & the time required to reach this stage is termed as "setting time".
What are the special cements?
There are 15 types of cements such as-1.)O P C cement, 2.) P P C cement 3.) Low heat cement 4.) Quick setting cement 5.) White cement 6.) Coloured cement. 7.) Blust Furnace Slag cement and so on
What is vicat apparatus used for?
vicats apparatus is used for initial setting time of cement.
What is false setting of cement?
False-setting is when cement abnormally and prematurely sets.
What is the difference between false set and flash set of cement?
False set is caused by having too much hemihydrate of calcium sulfate. It does not produce much heat. Flash set produces a lot of heat and is caused by a lack of calcium sulfate.
How gypsum effect the setting time of cement?
gypsum increase the setting time of cement.
What is the importance of setting time?
because when we know the setting time of cement we easily identified that where can we use the cement according to there setting time.
Can you reuse the cement after it has crossed its setting time?
yes, if it is before the initial setting time...
Why gypsum added to cement?
3% of gypsum is added to cement to "prevent the rapid setting of cement"
What is the effect on setting time of cement if water added is less or more than 85 percent of normal constituency of cement?
how the water mixed with cement affects the time of its setting
What is the importance of setting time of cement?
because when we know the setting time of cement we easily identified that where can we use the cement according to there setting time.
Why 2 gypsum is added in the cement?
The construction industry uses both the natural and the synthetic forms of gypsum in Portland cement manufacturing. Although the amount of gypsum used in the mix represents a small percentage of the volume of all ingredients, gypsum has important functions.
Why 2 of gypsum is added to cement?
Gypsum is added to cement to decrease the setting time.
Property of cement?
The properties of cement are,Chemical compositionLoss on ignitionInsoluble residuessulphur content and magnesia contentSoundnessHeat of hydrationSetting timeInitial setting timeFinal Setting timeFinenessStrength of cementConsistency.
What is initial setting time of cement?
It's the time from which cement starts the setting process after water is added.. Usually it is 30 min.. It can be delayed or advanced using chemicals..
