Portland Limestone Cement

Higher early strength portland cement

Portland Limestone Cement is used widely in ready-mixed concrete and concrete products, civil engineering and building applications and provides a lower carbon alternative to traditional Portland Cement.

Portland Limestone Cement is available in bulk tanker delivery throughout Great Britain.


Architectural Concrete

Concrete Block Paving

Dry Silo Mortar

Engineered Solutions

Roof Tiles

Technical information

The properties of fresh concrete made with Portland Limestone Cement are like those of a Bulk Portland CEM I concrete, although the setting time may be slightly shortened and the tendency to bleeding significantly reduced. The appropriate cement content for concrete of a given 28 day cube strength and slump should be determined from trial mixes.
The cement content may differ from that of an equivalent Portland cement (CEM I) concrete in certain circumstances. Where a high strength concrete is required, the cement content may be slightly higher than for CEMI.
At the same concrete strength, Portland Limestone Cement concrete has similar performance to CEMI concrete in respect of carbonation rate, chloride ingress and resistance to freezing and thawing (both air-entrained and non air-entrained concrete).

User guide

Concrete, mortars and grouts containing Portland Cements must be specified and used correctly for best performance.

Portland Limestone cement should not be mixed with additions or other cement types.

The cement content must be correct and the water:cement ration as low as possible consistent with satisfactory placing, thorough compaction and effective curing.

The final finish quality of this material will depend upon the user having the required skills and a familiarisation with the materials and its application methods.

Portland Limestone cement is manufactured from natural products, and slight shade variations may occur. Portland Limestone cement will also have shade variations from differing manufacturing centres.

Tarmac cannot be held responsible where workmanship has not been carried out in accordance with good practice.



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