Eco Phoenix (fly ash based) BS EN CEM IV/B-V 32,5N - LH

Low CO2, Eco Phoenix cement that contains more than 40% siliceous fly ash. Certified low heat of hydration, minimised risk of early-age thermal cracking, risk of ASR and chemical attack on concrete in aggressive ground conditions.


  1. Low Heat

    Certified low-heat bulk cement which helps prevent thermal cracking in large concrete pours.
  2. Reduced Carbon

    Eco Phoenix has much less embodied carbon than any ordinary Portland cement. This makes it a much more sustainable choice of construction material.

  3. Resistance to Sulfate Attack & Aggressive Ground

    Due to its high fly ash content Eco Phoenix is highly sulfate resisting & carries the BS 8500 ‘+SR’ suffix.

  4. Resistance to Chlorides

    Eco Phoenix is inherently more resistant to ingress of chloride than Portland Cement.

  5. Resistance to Carbonation

    The use of designed concrete containing CEM IV/B-V is permitted in all carbonation classes.
  6. Quality assured CE Marked product


  • Wind Farms
  • Infrastructure
  • Major Contracts
  • Nuclear
  • Marine
  • Waste
  • Power
  • Tiles
  • Roof Tiles
  • Agricultural
  • Drainage
  • Grout
  • Soil Stabilisation

Case Studies


National Football Centre, St George's Park

Including 2 hotels, indoor football pitch, fitness and rehabilitation centre, swimming pool, spectator seating and basic infrastructure, this high-profile project required a sustainable, locally sourced solution. For the foundations, footings, retaining walls, drainage and floor slabs of the National Football Centre, Eco Phoenix concrete was supplied from Tarmac.


Eco Phoenix Pendennis Dock

In 2012 an expansion plan for Falmouth’s Pendennis shipyard was approved. The development included creation of 2 new wet docks, 3 construction halls and a four-storey office complex.

Technical Information

Eco Phoenix is available in bulk tankers, manufactured at Tarmac Aberthaw works and can be ordered over the phone 0845 4700 500


Tarmac Eco Phoenix, when compared with Tarmac bulk Portland cement concrete at the same cement content – has the following properties:

  • Slower strength development and potentially higher long-term strength.
  • 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. In particular, where a high strength concrete is required, the cement content may be slightly higher than for CEM I.
  • Extended setting time, particularly in cold weather.
  • Reduced bleed.
  • Darker in colour, particularly in fresh concrete.

Conditions of Use:

  • Can be used for most applications
  • Concrete, mortars and grouts containing Portland Cements must be specified and used correctly for best performance.
  • The cement content must be correct for the application (see BS 8500) and the water: cement ration as low as possible consistent with satisfactory placing, thorough compaction and effective curing. When using Eco Phoenix it is particularly important that effective curing is applied.
  • As with all concretes, the final finish quality of this material will depend upon the operative having the required skills and a familiarisation with the materials and its application methods.
  • Tarmac cannot be held responsible where workmanship has not been carried out in accordance with good practice.

Eco Phoenix is manufactured from natural products, and slight shade variations may occur. Eco Phoenix will also have shade variations from differing manufacturing centres. 

Regional Order Numbers:

Scotland & North East England - 0845 4700 300

North & Midlands - 0845 4700 400

South Wales & South West - 0845 4700 500

London & South East - 0845 4700 600

  • Achillies Building Confidence
  • Carbon Trust Standard

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