What is a chemical property of Portland cement?
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Tricalcium silicate and dicalcium silicates contribute most to the eventual strength. Initial setting of Portland cement is due to tricalcium aluminate….The chief chemical constituents of Portland cement are as follows:
| Lime (CaO) | 60 to 67% |
|---|---|
| Silica (SiO2) | 17 to 25% |
| Alumina (Al2O3) | 3 to 8% |
| Iron oxide (Fe2O3) | 0.5 to 6% |
What are the chemical composition of pozzolana?
The chemical composition of pozzolana is variable and reflects the regional type of volcanism. SiO2 being the major chemical component, most unaltered pumices and ashes fall in the intermediate (52–66 wt% SiO2) to acid (>66 wt% SiO2) composition range for glassy rock types outlined by the IUGS.
What is the chemical property of cement?
(b) Chemical Properties of Cement
| 1 | Lime | 60-70 |
| 2 | Silica | 17-25 |
| 3 | Alumina | 3-8 |
| 4 | Iron Oxide | 0.5-6.0 |
| 5 | Sulfur Trioxide | 2.0-3.5 |
What chemicals are in Portland cement?
Chemical composition Portland cement is made up of four main compounds: tricalcium silicate (3CaO · SiO2), dicalcium silicate (2CaO · SiO2), tricalcium aluminate (3CaO · Al2O3), and a tetra-calcium aluminoferrite (4CaO · Al2O3Fe2O3).
What is portland Pozzolana cement?
The Portland Pozzolana Cement is a kind of Blended Cement which is produced by either inter-grinding of OPC clinker along with gypsum and pozzolanic materials in certain proportions or grinding the OPC clinker, gypsum and Pozzolanic materials separately and thoroughly blending them in certain proportions.
What are the physical properties of portland cement?
Physical Properties of Cement
- Fineness of cement.
- Soundness.
- Consistency.
- Strength.
- Setting time.
- Heat of hydration.
- Loss of ignition.
- Bulk density.
What are pozzolanic properties?
A pozzolan is a siliceous or siliceous and aluminous material that in itself possesses little or no cementitious value but will, in finely divided form and in the presence of moisture, chemically react with calcium hydroxide at ordinary temperatures to form compounds having cementitious properties.
What is the physical properties of portland cement?
Portland cement has a specific gravity of 3.15, but other types of cement (for example, portland-blast-furnace-slag and portland-pozzolan cement) may have specific gravities of about 2.90.
What are the physical properties of ordinary portland cement?
Fineness. Fineness, or particle size of portland cement affects rate of hydration, which is responsible for the rate of strength gain.
What is the function of Portland pozzolana cement?
Uses of Portland Pozzolana Cement Used in hydraulic structures, marine structures, construction near the sea shore, dam construction etc. Used in pre-stressed and post-tensioned concrete members. Used in masonry mortars and plastering. As it gives better surface finish, it is used in decorative and art structures.
What are the advantages of Portland pozzolana cement?
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 is Portland pozzolana cement?
Portland Pozzolana cement is integrated cement which is formed by synthesising OPC cement with pozzolanic materials in a certain proportion. It is commonly known as PPC cement. In this article we discuss about the properties, manufacture, characteristics, advantages and disadvantages of Portland Pozzolana cement.
Is pozzolanic material cementitious?
The pozzolanic material may not posses cementitious property but it is a material which essentially contains silicious or aluminous material. The pozzolanic material is in finely divided form and the material mainly used for making portland pozzolana cement is fly ash and calcined clay.
What is Pozzolano cement used for?
Pozzolano consists of silica material which makes it cheap and hence reduces the cost of the cement making it economical to use. Pozzolana cement has very good resistance against sulphate attack hence is used in hydraulic structures, marine structures, construction near the sea shore, dam construction etc.
What is the full form of PPC cement?
As we know PPC cement full form is Portland pozzolana cement, the name Portland & pozzolana are both historical term used before naming cement.