Civil Engineering - Building Materials - Discussion
Discussion Forum : Building Materials - Section 1 (Q.No. 11)
11.
The initial setting time of lime-pozzolana, is
Discussion:
52 comments Page 2 of 6.
SIKUN BISWAL said:
7 months ago
OPC's initial setting time is 30 MIN.
And final setting time is 600 MIN.
And final setting time is 600 MIN.
(1)
Jack dcruz said:
8 years ago
Why it's initial setting time more than to opc?
Swapnil Pawar said:
2 years ago
The initial setting time is 30minutes.
Taimoor Nasir said:
8 years ago
The calcium hydroxide reacts with the carbon dioxide in the atmosphere to give calcium carbonate that gains cementing properties (Carbonation) as their is low CO2 in air thats why it takes Longer time to Set than OPC which uses water for Setting ! And probably that is why Lime Cement is not used in Under water Structures due to Absence of C02.
Rohith said:
8 years ago
I am not getting it, Give me the explanation.
Civil era said:
7 years ago
Pozzolana material particles size is less than 90micron, it does not have any cementing property but shows when it contact with water due to overgrinding (i.e less than 90micron) its rate of hydration increases but less heat of hydration so it shows large initial setting time but in question lime-pozzolana (it means it is a gauged cement) lime also show setting property also some time addition of water.
Souhard bhati said:
7 years ago
Aluminum has a quick setting quality when mixed as raw material then how high alumina cement has more setting time as compared to opc, Even the aluminum amount is high.
Ravikant said:
7 years ago
What is the setting time of Rapid hardening cement?
Sumit said:
7 years ago
What is the initial and final setting time of RHC?
Ariful Sardar said:
2 months ago
The initial setting time of lime-pozzolana is generally two hours (120 minutes).
This is the time it takes for the cement paste to start losing its plasticity when mixed with water.
This is the time it takes for the cement paste to start losing its plasticity when mixed with water.
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