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Portland pozzolana cement (PPC) has following advantages when concrete is in its hardened state. Compressive Strength & Rate of Strength Gain. Modulus of Elasticity. Bond of Concrete to Steel. Heat of Hydration. Reduced Shrinkage. Permeability.
What are the advantages and disadvantages of Pozzolana cement?
Pros of PPC over OPC: The heat of hydration of PPC is lower than that of OPC. PPC has higher fineness than OPC. PPC has high durability than OPC which means the structure will last longer and have longer life. PPC is more resistant towards the attack of sulphates, alkalies, chlorides and chemicals as compared to OPC.
What are the disadvantages of Portland Pozzolana cement?
Disadvantages of Portland Pozzolana Cement The initial strength obtained is less, which effect the de-shuttering of supports early. As it contains more fine material, handing of concrete is difficult. When compared to the OPC setting time is less for PPC.
What is a Portland Pozzolana cement?
PPC is a type of blended cement. 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.
What are the advantages of PPC cement?
Low heat of hydration. Due to high fineness, PPC has better cohesion with aggregates and makes more dense concreteness. Comparative lower Water-Cement ratio provides an added advantage for the further increase of compressive strength of the concrete. Better surface finish.
Why is pozzolana added to cement?
What does a pozzolan do in the concrete? A. Pozzolans reduce bleeding because of fineness; reduce the maximum rise in temperature when used in large amounts (more than 15% by mass of cementitious material) because of the slower rate of chemical reactions; which reduce the rise in temperature.
Why we use ordinary Portland cement?
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.
Is pozzolana a cement?
Pozzolanic cements are mixtures of portland cement and a pozzolanic material that may be either natural or artificial. The natural pozzolanas are mainly materials of volcanic origin but include some diatomaceous earths. Artificial materials include fly ash, burned clays, and shales.
Which cement is best for construction?
Which is the best cement for house construction? Ordinary Portland Cement (OPC) 43 Grade Cement: It is used majorly for wall plastering works, Non-RCC structures, pathways etc. Ordinary Portland Cement (OPC), 53 Grade Cement: Portland Pozzolana Cement (PPC): Portland Slag Cement (PSC): White Cement:.
Which cement is best OPC or PPC?
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. OPC is highly applicable where fast pace of construction is required.
What is the difference between ordinary Portland cement and Portland pozzolana cement?
Portland Pozzolana Cement is a variation of Ordinary Portland Cement. Pozzolana materials namely fly ash, volcanic ash, are added to the OPC so that it becomes PPC. Both are ecofriendly materials but Pozzolana Cement uses natural and industrial waste thus reducing the environmental pollution.
What are the properties of ordinary Portland cement?
Ordinary Portland cement is one of the most widely used type of Cement.Properties of Ordinary Portland Cement. Properties Values Fineness 330 kg/m 2 Soundness 2.5mm Bulk Density 830-1650 kg/m 3.
What is pozzolana used for?
Roman engineers used two parts by weight of pozzolana mixed with one part of lime to give strength to mortar and concrete in bridges and other masonry and brickwork. During the 3rd century bc, the Romans used pozzolana instead of sand in concrete and mortared rubblework, giving extraordinary strength.
Is UltraTech OPC or PPC?
Ultratech and Grade: PPC and OPC ULTRATECH CEMENT, 50 KG Packaging Size 50 KG Brand Ultratech Grade PPC , OPC , SUPER Packaging Type Bag Cement Grade Grade 43, Grade 53.
What is the grade of UltraTech PPC cement?
UltraTech Portland Cement, 50 Kg Type PPC Cement Grade 43 Grade Packaging Size 50 kg Packaging Type HDPE Sack.
Is PPC grade A cement code?
IS Codes: The Ordinary Portland Cement when used by the house builders should conform to IS 269. The Portland Pozzolana Cement carries IS 1489 Part I mark. The White Portland Cement carries IS 8042 mark. Ordinary Portland Cement is commonly known as OPC and Portland Pozzolana cement is commonly known as PPC.
Can pozzolans react without cement?
The pozzolanic reaction converts a silica-rich precursor with no cementing properties, to a calcium silicate, with good cementing properties.
Is pozzolan better than cement?
Typically pozzolans are used as cement replacements rather than cement additions. Adding pozzolans to an existing concrete mix without removing an equivalent amount of cement increases the paste content and decreases the water/cement ratio. In other words, adding more pozzolans to a mix changes the mix proportions.
What makes concrete mix too wet?
When there is too much water in the concrete, there is greater shrinkage with the possibility for more cracks and reduced compressive strength. As a general rule, every additional inch of slump decreases strength by approximately 500 psi.
Which cement is better 43 grade or 53 grade?
The fineness in cement generates early gain in strength, but along with high heat of hydration. OPC 43 grade cement is generally used for non-structural works like plastering flooring etc. Whereas OPC 53 grade cement is used in the projects which require higher strength like concrete bridges, runways RCC works etc.
What is normal Portland cement?
Ordinary Portland cement (simply called ordinary cement) refers to the hydraulic binding material ground by mixing Portland cement clinker, 6% ~ 15% blended materials, and appropriate amount of gypsum, code-named P• O.
What are the advantages of cement?
The Benefits of Concrete the lowest carbon footprint for a structure or pavement over its lifecycle. unparalleled strength, durability, longevity and resilience. maximized energy efficiency via thermal mass. durability in any environment. a building material that doesn’t burn, rust or rot. safety and security.
What are the grade of cement?
According to Indian Standards, it is classified into three grades, OPC 33 Grade, OPC 43 Grade, OPC 53 Grade cements. Ordinary Portland Cement 33 Grade. Ordinary Portland Cement 43 Grade. Ordinary Portland Cement 53 Grade. Portland Slag Cement (PSC) Coloured Cement: White. Portland Pozzolana Cement (PPC).
What is the difference between pozzolan and pozzolana?
As nouns the difference between pozzolan and pozzolana is that pozzolan is any material which, when combined with calcium hydroxide, exhibits cementitious properties; often used as an extender with portland cements while pozzolana is a type of volcanic ash used for mortar or for cement which sets under water.
What is fly ash cement?
Fly ash is a pozzolan, a substance containing aluminous and siliceous material that forms cement in the presence of water. When mixed with lime and water, fly ash forms a compound similar to Portland cement.
