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Tasek Buaya Ordinary Portland Cement (OPC) 50KG

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Tasek Buaya Ordinary Portland Cement (OPC) 50KG
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Tasek Buaya Ordinary Portland Cement (OPC) 50KG
  • Stock: In Stock
  • Brand: Tasek
  • Model: TASEK-OPC
  • Weight: 50.00kg
RM25.50
Price in reward points: 9600

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What is Ordinary Portland Cement (OPC)? 

Ordinary Portland Cement (OPC) is one of several types of cement being manufactured throughout the world. OPC is the general purpose cement used in concrete constructions. OPC is a compound of lime (CaO), silica (SiO2), alumina (AL2O3), iron (Fe2O3) and sulphur trioxide (SO3). Magnesium (MgO) is present in small quantities as an impurity associated with limestone. SO3 is added at the grinding stage to retard the setting time of the finished cement. When cement raw materials containing the proper proportions of the essential oxides are ground to a suitable fineness and then burnt to incipient fusion in a kiln, chemical combination takes place, largely in the solid state resulting in a product aptly named clinker. This clinker, when ground to a suitable fineness, together with a small quantity of gypsum (SO3) is Portland Cement. 

  • ASTM: Type I. 
  • MS EN 197-1:2007. 
  • Properties: Ordinary. 
  • Uses: General. 


 

Why is it called Portland Cement? 

Invented in 1824 by the UK bricklayer Joseph Aspdin (1779-1855), it gets its name from its resemblance upon hardening to the famous Portland limestone obtained from quarries on the Isle of Portland. 

  

Cement Quality 

The quality of Portland cement is defined by Malaysian Standard MS EN 197-1:2007, which is adopted from European Standard EN 197-1:2000. These standards specify a series of test for which the cement will have to conform to. The most common being : 

  • Fineness - Blaine Method . 
  • Chemical Composition . 
  • Strength - Mortar / Concrete Cubes . 
  • Setting Time - Vicat Method . 
  • Soundness - Le'Chatelier Method . 

  

Types of Cement 

Portland Cement
Types ASTM MS Propertise Uses
Ordinary portland cement type I 522 ordinary General
Super High early strength portland cement type III 522 rich in C3S, finer ground, high early strength Winter, Urgent
Super high early strength portland cement     good particle size distribution, rich in SO3 higher in early strength than type III Winter, Urgent
Moderate heat portland cement type II   low in C3S, low in C3A, low heat of hydration & high long term strength Dam, Mass concrete
Low heat portland cement type IV   low heat of hydration, low early strength Dam, Mass concrete
Sulphate resisting cement type V 1037 low in C3A, high chemical resistance Underground water
White portland cement   888 minute in iron, pure-white, fine ground, high early strength Buildings, Arts
BLENDED CEMENT
Portland blast furnace slag cement type IS 1389 low heat of hydration, good chemical resistance, high long term strength, less shrinkage Dam, Mass concrete
Portland pozzolan cement type IP   blended with siliceous material, low heat of hydration, good durability, good chemical resistance Civil work, Mass concrete
Portland fly-ash cement   1227 good workability & fluidity, slow set, low heat of hydration, high long term strength Civil work, Pre-packed concrete
Super-sulphate slag cement   1388 high long term strength, small shrinkage, easy to aerate Underwater concrete
Masonry cement   794 goodplasticity, water retentivity, water tightness & low shrinkage Masonry, for joints

  

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