Product
The product
Lafarge Ordinary Portland Cement (OPC) conforms to the Singapore Standards SS 26 and is well suited for use in general concrete construction works where there is no exposure to sulphates in soil or groundwater or possibility of chloride ingress activity. Ordinary Portland Cement is the most widely used cement and has been the traditional choice in general concrete production, masonry/ plastering, grouting worksManufacture
The raw materials required for the manufacture of OPC are calcareous material such as limestone or chalk and argilaceous materials such as shale or clay.A mixture of these materials is burnt at a high temperature of approximately 1400oC in a rotary kiln to form clinker.The clinker is then cooled and grounded with a requisite amount of gypsum into fine powder known as portland cementOrdinary Portland Cement is a gray coloured powder. It is capable of bonding mineral fragments into a compact whole when mixed with water. This hydration process results in a progressive stiffening, hardening and strength development .
Quality assurance & quality control
In the manufacture of OPC, the proportioning of raw materials is strictly controlled at all stages to ensure that the quality of the finished product well exceeds the quality requirements stipulated in the relevant standard specifications.Regular physical and chemical testings are also carried out on the cement according to the SS26 requirements. Our OPC currently meets the 42.5N strength class.
