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This is the Portland cement found in most precast and ready-mixed concrete. It is ideal for use on its own or in conjunction with cementitious additions such as ash. The use of admixtures alongside CEMEX Portland can be beneficial in terms of concrete in its plastic and hardened state.
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Once set, the early-age strength development of CEMEX Rapid exceeds that of CEMEX Portland. For this reason it is ideal for reducing mould or formwork stripping times in precast and ready-mixed applications. Its faster rate of reaction also generates more heat, which can be advantageous in colder conditions.
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CEMEX Extra is a factory manufactured Portland-fly ash cement that complements our existing range of Portland cements. It has enhanced properties that provide benefits in a wide range of concrete, mortar, render, screed and grout applications. CEMEX Extra is manufactured by burning a precisely specified mixture of raw materials containing lime, silica, alumina and small quantities of other materials to forma clinker. The clinker, selected fly ash and calcium sulfate, (to control setting), are combined to produce a very consistent cement with improved characteristics.
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Features/benefits
- CEMEX Extra can be used in concrete, mortar, render, screed and grout.
- Improved workability, cohesion and finishing.
- Ideal for self-compacting concrete.
- Sulfate resistance to Design Sulfate Class 4a. (Refer to BS 8500 or BRE SD 1 for guidance).
- Low effective alkali content gives a reduced risk of ASR.
- Reduced permeability and chloride ion diffusion.
- Reduced risk of thermal cracking.
- Enhanced durability gives increased design life and reduced whole life costs.
- Consistent, convenient and cost effective.
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