False-setting is when cement abnormally and prematurely sets.
yes, if it is before the initial setting time...
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..
It is not rain forced but re-inforced cement concrete. It means the concrete after setting and hardening.
An arbitrary division has been made for the setting time of cement as initial setting time and final setting time.It is difficult to draw a rigid line between these two arbitrary divisions.For convenience,initial setting time is regarded as the time elapsed between the moment that the water is added to the cement,to the time that the paste starts losing its plasticity.The final setting time is the time elapsed between the moment that the water is added to the cement ,and the time when the paste has completely lost its plasticity and has attained sufficient firmness to resist certain definite pressure.
yes I'm also little confused ..
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.
False set occurs when cement appears to set but can still be remixed and flow, while flash set is a rapid and irreversible setting of cement that cannot be reversed. False set can be corrected by adding more water and re-mixing, while flash set requires the cement to be discarded and fresh cement to be used.
False-setting is when cement abnormally and prematurely sets.
gypsum increase the 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.
yes, if it is before the initial setting time...
3% of gypsum is added to cement to "prevent the rapid setting of cement"
how the water mixed with cement affects the time of its setting
because when we know the setting time of cement we easily identified that where can we use the cement according to there setting time.
Gypsum is added to cement to decrease the setting time.
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..