Best cement: OPC or PPC? – Both Ordinary Portland and Portland Pozzolana types of cement are widely used for construction purposes. OPC is produced by simply grinding limestone and secondary materials to a powder; and the Portland Pozzolana is a variation of ordinary Portland with an added mixture of Pozzuolanic materials like Fly ash, volcanic ash, clay, slag etc in the ratio of 15% to 35% by weight, which increases the strength of the concrete.
Both OPC and PPC are eco-friendly materials but Pozzolana Cement is made of natural and industrial waste. OPC is available in 3 grades as grades 33, 43 and 53 and Pozzolana is available in only one grade and its strength is equal to the strength of grade 33 of OPC PPC produces highly durable concrete as it has low water permeability compared to OPC.
PPC has low initial setting strength compared to OPC but hardens over a period of time with proper curing. And PPC is cheaper also compared to OPC. PPC is highly resistant to sulphate attacks and thus it has its applications in mass concrete work like dams, huge foundations, and buildings near seashores, reservoirs and in other marine works.
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Which is better PPC or OPC?
PPC has an edge on OPC as PPC has slower rate of heat of hydration. Thereby PPC is prone to less cracks & reduced shrinkage), better workability and finishing (as fly ash based cement are spherical in shape and finer in size).
Where is OPC cement used?
OPC is a general purpose Portland cement suitable for all uses where the special properties of other types are not required. It is used where cement or concrete is not subject to specific exposures, such as sulfate attack from soil or water, or to an objectionable temperature rise due to heat generated by hydration.
Which cement sets fast OPC or PPC?
Difference Between OPC and PPC Cement Sheikh Anwarul Mahdi PPC cement full form is Portland Pozzolana Cement, OPC cement full form is Ordinary Portland Cement, Both PPC and OPC cement is used in construction. PPC cement is a variant of OPC cement. These two types of cement differ from each other in terms of component, strength, heat generation, the percentage of several components, durability, grades, cost, eco-friendly nature, application, setting time, curing period, etc.
| Sources | OPC Cement | PPC Cement | |
|---|---|---|---|
| 1 | Definition/ Components | A mixture of limestone and other raw materials like argillaceous, calcareous, and gypsum is prepared and then grinded to prepare OPC (Ordinary Portland Cement). | PPC (Portland Pozzolana Cement) is prepared by adding Pozzolanic materials to OPC. So, the main components are OPC, gypsum, and pozzolanic materials (15~35%) which include calcined clay, volcanic ash, fly ash, or silica fumes. |
| 2 | Strength | Initial strength is higher than PPC. | PPC concrete has higher strength than OPC concrete over a longer period of time. |
| 3 | Heat of hydration | Generates more heat than PPC in hydration reaction which makes it less suitable for mass casting. | It has a slow hydration process and thus generates less heat than OPC. |
| 4 | Durability | OPC concrete is less durable in aggressive weather. | PPC concrete is more durable in aggressive weather. |
| 5 | Cost | Costlier than PPC. | Cheaper than OPC. |
| 6 | Environmental Impact | Emits CO 2 during the manufacturing process. | It constitutes industrial and natural waste which makes it eco-friendly. |
| 7 | Application/ | It is suitable where fast construction is required but not suitable for mass concreting due to heat issues as mentioned above. | It is suitable for all types of construction work. For example RCC casting of buildings, mass concreting for bridges, and even plastering and other non-structural works. |
| 8 | Setting Time | Lower than PPC. Its initial setting time is 30 minutes and the final setting time is 280 minutes. Its faster setting time helps faster construction. | The setting time of PPC portland is higher than OPC. Its initial setting time is 30 minutes and the final setting time is 600 minutes. Its slower setting time helps to get better finishing. |
| 9 | OPC has finiteness of 225 sq.m/kg. It has lower fineness than PPC. So, it has higher permeability resulting in lower durability. | OPC has finiteness of 300 sq.m/kg. It has higher fineness than OPC. So, it has lower permeability resulting in higher durability. | |
| 10 | Grades available | 33 Grade, 43 Grade, and 53 Grade OPC cement are available. | No specified grade of PPC cement is available. |
| 11 | Lower than PPC. | Higher than OPC. | |
| 12 | Resistance against chemical attack | It has lower resistance against alkalis, sulfates, chlorides, etc. | It has higher resistance against alkalis, sulfates, chlorides, etc. |
Difference Between OPC and PPC Cement
Why is PPC better?
Advantages of PPC: –
PPC produces quick results. Once your PPC campaign starts, you should immediately start to see more traffic, clicks, and conversions. SEO can take months before you start to see your site moving up the search engine results.Your PPC account is controllable. You set your budget and have a decent idea of how many leads you are getting in return. This helps you estimate an accurate budget for your digital marketing. SEO can take longer or require more money if the industry or location you want to rank for is very competitive.Using PPC means you don’t have to worry about a search engine’s algorithm impacting your position. You’re bidding on the top spots, so your organic rank isn’t going to matter. With SEO, you have to ensure that you’re optimizing your site to Google’s standards of best practice, or you could lose rank or be penalized for certain tactics.PPC allows you to strictly target potential customers. You can target ads using search keywords, geography, and different times of the day and week. With organic traffic, you may not target the specific audience you need.With PPC, you can take advantage of visual product ads. This can help a user see what they will be clicking on and improve the click-through rate because it offers a feature an organic search can’t.
Is PPC good for foundation?
A strong foundation holds your dream home above the ground. It keeps out moisture, insulates against the corrosion from underground chemicals and resists movement of the earth around it so that your home stands tall and proud for ages. In this section we will answer important questions on the choice of cement for foundation setting and some good foundation building practices that will keep it going strong for generations.
What is the role of cement in building a strong foundation? Cement binds all the building materials used in the foundation in a consistent state to ensure a solid structure. Better the quality of cement used the stronger and more durable the foundation. Which type of cement is best for constructing the foundation? The foundation carries the load of the construction and hence needs to be strong and durable. Portland Pozzolana Cement (PPC) is the ideal cement to be used as it hydrates slowly and gives high final strength. Why Birla, A1 Premium Cement is considered as the best for foundation? Birla, A1 Premium Cement is manufactured with state-of-the-art manufacturing technology to ensure Uniform Particle Size Distribution (UPSD). Concrete made from it is homogenous, attains higher compressive strength and can sustain higher pressure. The concrete made with Birla, A1 Premium Cement is also chemical, sulphate and corrosions resistant.
