Which cement is best for mass concrete?
Which cement is best for mass concrete?
Due to its low heat evolution property, Portland Puzzolana cement is used for mass concrete works, such as in dam construction and in areas where concrete will be exposed to extreme temperatures, such as in incinerators.
Why is PPC used for mass concrete?
Since the pozzolanic material reacts with calcium hydroxide liberated by the hydrating Portland cement and forms cementatious compounds, PPC makes the concrete more impermeable and denser as compared to OPC and it is this property coupled with its cost effectiveness that has helped in its emerging more popular in the …
What change is made to OPC to get rapid hardening cement?
1. Rapid hardening of cement can be obtained by fine grinding of clinker thus increases the surface area of the cement particles which turn increases the rate of hydration of cement that leads to decrease in setting time of cement.
Which cement is used for marine works?
Important Points
| Type of Cement | Where to Use |
|---|---|
| Rapid hardening Cement | Road work where it is must to open the road with minimum delay. |
| Extra Rapid hardening | Concreting in cold weathers |
| Low Heat Cement | Mass Constructions like Dams, abutments etc. |
| Portland Pozzolana Cement | Marine and Hydraulic constructions, Mass concrete structures. |
Where is PPC and OPC cement used?
Use of PPC and OPC They can be reliably utilized in the construction of marine structures, masonry mortars and plastering, hydraulic structures. Besides, they are popularly used in mass concreting works, such as dykes, sewage pipes, dams, etc. PPC is also employed in all other applications where OPC is used.
Why rapid hardening cement is not used for mass concrete?
Properties of Rapid Hardening Cement In 3 days it develops 7 days strength of OPC with same water cement ratio. Its final setting times is 30 mins and final setting time is 600mins which is same as OPC. It emits more heat during setting, therefore this cement is unsuitable for mass concreting.