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Lime Concrete for Flooring

The Ideal Solution for Breathable and Durable Floors

In the general construction world, it’s common to hear the term “concrete” when talking about flooring: reinforced concrete, structural concrete, but lime concrete is widely used for renovating our old houses, floors of listed buildings, and increasingly in sustainable construction. This concrete is therefore called lime concrete, a solution for flooring (paving).

Lime concretes are an alternative to traditional concretes often composed of cement. They allow for the creation of interior ground floor paving in the renovation of old buildings (cellar floors, wine cellars, floors of Historical Monuments, old individual houses). Moreover, they are also perfectly suited for new constructions and eco-housing.

Creating a lime concrete floor is an essential foundation to stabilize the covering and allow hygrometric exchanges between the floor and walls in so-called old buildings. When the floor/wall/roof system is designed coherently, it’s a large part of future pathologies that are avoided many years later. So why deprive ourselves of it?

Offered in classic use (natural hydraulic lime + sand/gravel) or mixed with other aggregates such as clay beads, expanded shale, or pozzolana, these different solutions have different properties but thus offer more choices to the applicator. Discover below our different lime concrete solutions and the associated technical application advice for your work. 

What are the technical advantages of SAINT-ASTIER® lime concretes?

  • Natural and healthy
  • Excellent hygrothermal regulators
  • Simple to implement
  • Light and insulating (depending on the aggregate)
  • Respect for old buildings
  • No emission of VOCs (Volatile Organic Compounds)

Natural hydraulic lime: a millennial binder

Over the centuries, natural hydraulic limes, used as binders to compose mortars, were used in construction in all types of structures including floor concretes.

All of SAINT-ASTIER®’s lime concrete offerings have an EXCELL GREEN ZONE label with the use of pure natural hydraulic lime TRADI 100® NHL 5. This natural hydraulic lime, known and highly appreciated by its peers for over 110 years, is the most suitable lime for implementing lime concretes.

Used and recommended for so long on construction sites, it will therefore be easy for us to advise you and provide you with our feedback on the implementation of this solution. Don’t hesitate to contact your Saint-Astier representative present in your department for any questions!

Lime concrete: some technical details to better understand this solution…

Application areas
  • Disconnected “non-load-bearing” paving for ground floors of heritage buildings, vernacular buildings, cellar and wine cellar floors (note that a greater thickness may be necessary in the case of barrel cellars), troglodyte habitat, restoration of existing building floors, new individual houses, timber-frame houses…

 

  • These lime concrete pavings are only feasible inside buildings. On a Saint-Astier® concrete paving, it is possible to create “partitioning” in plaster bricks, plasterboard, brick tiles, plaster tiles…
The strength of a lime concrete slab

Composed of aggregates* and CHAUX PURE TRADI 100® NHL 5, the strength of a lime concrete slab is about 3 to 4 MPa, or 30 to 40 kg/cm² at 28 days. In contact with air and moisture, this strength continues to progress and can double after only 4 months. These strengths are more than sufficient for the use we intend for them.


* The aggregates usable for Saint-Astier® natural concretes are described in the chapter “AGGREGATES”, page 5 of our dedicated technical documentation, don’t hesitate to refer to it. 

Lime concretes associated with other aggregates:

Lime concretes can be mixed with aggregates such as pozzolana, expanded shale, or clay beads, and each solution has its advantages!

Discover quickly our solution sheets presenting lime concrete associated with other aggregates:

NOTE: Saint-Astier® natural concretes with NHL lime do not refer to DTU 26.2 “Screeds and Slabs based on hydraulic binders”. It is therefore important to respect the application advice given in our dedicated documentation (consult our library). It may also be necessary for the company to contact its insurer before the start of this work.