There are a variety of types of cement that are used for concrete building. Each type of cement has its own characteristics that include its uses, advantages, and disadvantages dependent on the composition of the material employed in its production. Check Latest Cement Price in Pakistan at Price Review. PriceReview.pk Provides latest Price of Construction Materials and Mobile Phones in Pakistan.
7 Cement Types with their Useful Applications
- Ordinary Portland Cement (OPC)
- Portland Pozzolana Cement (PPC)
- Rapid Hardening Cement
- Quick setting cement
- Low Heat Cement
- Sulfates resisting cement
- Blast Furnace Slag Cement
1. Ordinary Portland Cement (OPC)
Normal Portland cement can be described as the commonly used cement type and is suitable for all types of concrete construction. This is by far the most widely manufactured and utilized type of cement in the world in the world, with a production of approximately 3.8 millions cubic metres each year. It is suitable for all types forms of construction using concrete.
2. Portland Pozzolana Cement (PPC)
Portland pozzolana cement is made by grinding pozzolanic cement with Portland cement. It can also be made by adding pozzolana through the addition of calcium or gypsum silicate or by in-depth and evenly mixing Portland cement with fine pozzolana.
This cement has a higher resistance to Chemical attacks to concrete, compared with standard portland cement so it is extensively used. It is utilized in marine structures, sewage work and sewage facilities, as well as for the construction of concrete under water, for example dams, bridges, piers and mass concrete works and so on.
3. Rapid Hardening Cement
Rapid hardening cement gains its strength at a high level in the initial days. It is commonly used in concrete when formworks are removed in the early stages and is comparable to normal Portland cement (OPC). It has a higher calcium content, and has a greater c3s levels and finer grinding. This provides greater strength than OPC in the early stages.
The strength of fast cement in the process of hardening over three days is the same as seven days in OPC using the exact ratio of water-cement. Therefore, the benefit from this particular cement is it allows formwork is removed earlier, which improves the speed of construction as well as reducing the construction cost by reducing the cost of formwork.
Rapid-hardening cement is employed in concrete construction prefabricated roads, road construction, etc.
4. Quick setting cement
The major difference between quick-setting cement and the rapid hardening cement lies in the fact that quick-setting cement sets faster. However the rate of increase of strength is comparable that of Ordinary Portland Cement, while the cement that is quick-hardening gains strength rapidly. Both forms are removed earlier.
Cement that is quick-setting is employed when the work is required to be completed in a very short time, and also for concrete in static or flowing water.
5. Low Heat Cement
A low-heat cement made by keeping the proportion of tricalcium oxide below 6.6%, by increasing the percentage of C2S. A small amount of tricalcium oxide causes the concrete create lower heat of hydration. Low heat cement is suitable to be used for concrete mass construction, such as gravity dams because of the low hydration temperature helps to prevent the cracking of concrete because of heat.
This cement has more power against sulphates. It is also more resistant and the its initial setting time is longer than OPC.
6. Sulfates Resisting Cement
Sulfate resistant cement is utilized to minimize the risk of sulfate attack to concrete and consequently is employed for foundations in areas with an excessive amount of sulfate. This cement has diminished the amount in C3A as well as C4AF.
Sulfate resistant cement is utilized in constructions that are exposed to intense sulfate actions by soil and water in areas such as culverts, canals, linings and siphons, retaining walls etc.
7. Blast Furnace Slag Cement
Slag from blast furnaces can be made by grinding cement clinkers, which contain around 60% slag. It resembles to a lesser extent the characteristics similar to Portland cement. It is a good choice in projects where financial concerns are the primary consideration.
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