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Ordinary Portland Cement (OPC) is a widely used type of cement in construction, known for its strength and durability. It is produced by grinding clinker, a mixture of limestone and clay, which is then heated in a kiln. The resulting fine powder is the primary ingredient in concrete and mortar, making it essential for various construction applications.
| Chemical composition | Mainly composed of calcium silicates, aluminates, and ferrites |
| Standard grades | Typically available in grades 33, 43, and 53 |
| Setting time | Initial set time of approximately 30 minutes to 2 hours |
| Compressive strength | Varies from 33 MPa to 53 MPa at 28 days |
| Color | Usually grey, but can also be white |
| Packaging | Available in 50 kg bags or bulk shipments |
When selecting Ordinary Portland Cement, buyers should consider the grade required for their specific application, as higher grades offer increased strength. It is also important to specify the desired setting time based on project timelines. Certifications such as ASTM or EN standards may be relevant for quality assurance, and buyers should indicate the quantity needed for their project to receive accurate quotes.
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OPC is the most common type of cement, while other types may contain additives for specific properties, such as resistance to sulfate or rapid setting.
It should be stored in a dry, cool place, protected from moisture to prevent it from hardening.
While OPC is versatile, extreme weather conditions may require special considerations, such as using additives for cold or hot weather.
When stored properly, OPC can have a shelf life of several months, but it should be used before its expiration date.
OPC production has a significant carbon footprint; however, efforts are being made to develop more sustainable alternatives.
OPC is primarily used in concrete production, mortar, and various construction applications requiring strong binding.