Hoffmann Green Cements: first decarbonated cements

The manufacture of conventional cement is very polluting. In particular, it requires a lot of energy to produce clinker, the main component of cement. To reduce its carbon footprint by 80% by 2050, the cement industry must therefore innovate.

Hoffmann Green is fully committed to this mission. Decarbonated cement is already an accessible reality. We have developed 3 types of cements without clinker, for a significant reduction in CO2 emissions. Today’s key challenge is to reduce the environmental impact of future construction.

3 new generation low carbon cements

In our state-of-the-art plant, we manufacture 3 carbon-free cements for all technical applications in sustainable construction: stairs, curbs, slabs, prefabricated walls, drainage paving stones, foundations or concrete blocks.

These 3 solutions are:

  • H-P2A (geopolymer technology) for adhesives
  • H-EVA (ettringitic alkaline technology) for mortars, plasters, roads and site concrete
  • H-UKR (alkali-activated dairy technology) for BPE, precast and site concrete

These innovative processes do not involve firing, but cold chemical reactions between materials by means of activators. The materials used are by-products from other industries: metakaolin clay, gypsum, blast furnace slag, sodium metasilicate.

High performance low carbon cements

Our cements have a carbon footprint divided by up to 5. This ecological performance goes hand in hand with technical performance that is equivalent, if not better, than that of conventional cements:

  • Excellent mechanical resistance: up to 25 MPa at 12 hours – 112 MPa at 28 days for H-UKR, up to 60 MPa at 28 days for H-EVA and a tensile strength on concrete greater than 25 MPa for H-P2A.
  • Low shrinkage, limiting the risk of concrete cracking
  • Excellent fire resistance and fire spread
  • A freeze/thaw cycle up to twice as long as that of a conventional cement
  • A good passivation of the concrete reinforcements, thanks to their alkalinity and pH close to 12

Ecological decarbonated cements

The main factor responsible for CO2 and greenhouse gas (GHG) emissions during the manufacture of concrete is cement. It is used as a hydraulic binder between aggregates.

Our cements make it possible to obtain a low-carbon concrete, thanks to the absence of clinker, 95% of which is made of a conventional Portland cement (CEM I) and comes from a highly emissive process (quarrying, transport, fossil fuel firing, grinding).

The use of Hoffmann Green cements is interesting for engineering concretes (self-placing, special foundations, screeds), prefabrication and even waste inerting.

Hoffmann Green cements contribute to a significant reduction in the carbon footprint of your construction, through :

  • An important Albedo, synonymous in eco-building with better energy performance
  • A concrete carbon footprint that complies with the requirements of the main eco-labels and certifications in commercial real estate (BBC, HQE, LEED, BREAM) !

Thanks to its innovations, Hoffman Green strives to preserve the environment as much as possible (by reducing the carbon footprint) while guaranteeing high-performance concretes for eco-construction.