What is ordinary portland cement list the properties and uses of ordinary Portland cement?
Ordinary Portland Cement is used for general construction purposes where special properties are not required. This cement has great resistance to cracking and shrinkage but less resistance to chemical attacks. This cement is also used for most of the concrete masonry units.
What is ordinary portland cement and uses?
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.
What is the composition of ordinary Portland cement?
Main constituents of cement are Tri-Calcium Silicate (3 CaO. SiO2). Di-Calcium Silicate (2 CaO. SiO2) and Tri-Calcium Aluminate (3 CaO.Al2O3).
What is the difference between ordinary Portland 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….The main differences in their characteristics and uses are –
| OPC | PPC |
|---|---|
| It is slightly costlier than PPC. | Cheaper than OPC. |
What is the strength of ordinary Portland cement?
42.5 R
The Ordinary Portland Cement (OPC) produced by National Cement is quality cement with 42.5 R Strength Class. Portland cement is the most common type of cement in general use around the world, used as a basic ingredient of concrete, mortar, stucco, and most non-specialty grout.
What is pozzolanic Portland 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.
What are the advantages of Portland 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.
Does Portland cement contain lime?
Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout. It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin, and is usually made from limestone.
Which cement is best for roof?
Use of OPC 53 grade and PPC ( Portland pozzolana cement) is the best cement for roof dhalai and for all type of RCC structure like footing,slab, beam and column.
Is Portland cement acidic or alkaline?
Portland cement, concrete’s binding agent, has a pH of 11, making it alkaline. For cement to effectively hold the various components within it, it should have a pH of around 11.
What is ordinary 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. The ignition loss of cement should be less than 5.0%.