Thermedia 0.6 B

by Lafarge Group

France’s “Grenelle Environnement” forum was decisive in raising awareness of the environmental challenges facing the country. It highlighted the urgent need to mobilize and act in favor of sustainable development at all levels of the construction ind

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Specifications

General

Product
Thermedia 0.6 B
Manufacturer
Lafarge Group

Product Type

Prefabricated concrete structures
Other - Concrete framed systems
Prefabricated concrete structures
Other - Concrete framed systems

Product description

France’s “Grenelle Environnement” forum was decisive in raising awareness of the environmental challenges facing the country. It highlighted the urgent need to mobilize and act in favor of sustainable development at all levels of the construction industry. Lafarge presents with Bouygues Construction Thermedia 0.6 B, a new concrete providing a real solution to the problem of energy loss through building envelope. Thermedia 0.6B’s groundbreaking properties provide a solution to the problem of thermal bridges that break a building’s interior heat insulation process.


A REAL RESPONSE TO ENERGY EFFICIENCY REQUIREMENTS RESPECTING TRADITIONAL CONSTRUCTION METHODS While the building sector represents approximately 37% of the world’s consumption of energy, 85% of that energy is consumed when buildings are in use: via heating, cooling, ventilation, lighting and hot water systems.


Analyses of a building’s life cycle reveal that the production of construction materials accounts for only 12% of the total energy consumption in a building with a 50- year lifespan. It is therefore vital to improve building energy efficiency to win the battle against climate change. Concrete has a major role to play in this effort, by virtue of the very properties that make it ideally suited for the construction of energy-efficient buildings.


The construction sector is now actively seeking to improve energy efficiency. The “Grenelle Environnement” forum set the ball rolling with its goal for overall consumption at X kWh/m² by 2012. This should induce a widespread introduction of Low Energy Consumption Buildings.


This important step goes hand in hand with existing thermal regulations (RT 2005), as well as those yet to come (RT 2012, RT 2020); all of them aim at the most restrained energy consumption possible. In addition to the use of efficient and cost-saving technical equipment, a building’s thermal performance is above all ensured by the creation of a carefully-designed envelope that avoids thermal bridges and optimizes insulation.


Lafarge and Bouygues Construction are aware of the stakes at hand and therefore pooled their expertise to develop Thermedia 0.6B, the first structural concrete contributing to energy efficiency in buildings. Energy consumption throughout a building’s lifespan (50 years) Demolition Maintenance Use Construction Production of materials Use : 200 Kwh/m2 per annum A NEW GENERATION OF CONCRETES Right now, Thermedia 0.6 B is the only concrete that combines strengths with lightness and mechanical performance with thermal properties.


A Unique Mix Design The Lafarge Research Center succeeded in developing an unprecedented concrete mix design (using aggregates, cements, additives and admixtures currently available on the market) and creating a product 40% less dense than standard concrete.


Lafarge’s patented mix design, Thermedia 0.6 B is unique. Its thermal conductivity is only onethird that of a standard concrete. This new concrete reduces by 35% the impact of the joints between the outside walls and mid-level floors (also known as thermal bridges).


Groundbreaking properties Thermedia 0.6 B is characterized by: > reduced thermal conductivity l=0,58 W/m.K compared to l » 1.65 W/m.K with standard concrete ; > reduced linear thermal transmittance between the outside walls and floors:  = 0.63 W/m.K compared to  = 0.99 W/m.K with standard concrete > mechanical strengths: 25 MPa (the same as standard concrete) Standard Concrete/Thermedia 0.6 B Comparisons Lining Outside wall Heat loss via thermal bridges reduced by 35% Standard Concrete Floor Lining PAGE 3/3 The concrete’s intrinsic qualities (mechanical properties, durability, and shrinkage, as well as fire and earthquake resistance and acoustic properties) were tested and certified conforming to the NF EN 206-1 standard.


Easy implementation respecting traditional construction methods Thermedia 0.6 B is a ready-mix concrete, produced in a concrete batching plant and poured directly at the building site. Its fluidity, close to that of self-leveling concrete, and its excellent workability make it a very easy material to implement, and its final appearance is identical to that of standard concrete. Unlike existing solutions for thermal bridge systems and outdoor thermal insulation, Thermedia 0.6B does not require any changes to standard French construction practices.


This ensures that building projects remain on schedule. BUILDING SITE IMPLEMENTATION: SIGNIFICANT USER FEEDBACK Thermedia 0.6B was very quickly implemented in low-rent housing sites thanks to the partnership between Lafarge and Bouygues Construction. It was thus possible to observe and analyze the concrete’s behavior during the building project, and validate its innovating properties. Examples of Building Site Implementations • Pouring Tests: 6.5 m38 and m3 for outside walls on the collective housing site at Impasse du Gué - Paris 18e – Bouygues Construction Ile de France / Lafarge Bétons Agency, Ile de France, Gennevilliers plant.(October 2007)


• Pouring Tests: 2 X12m3 for outside walls on the collective housing site at Rue de la Convention Paris 15e – Bouygues Construction Ile de France / Lafarge Bétons Agency, Ile de France, Gennevilliers plant. (June 2008)


• 140 m3 building worksite test on outside walls created for a collective housing building at Ste Geneviève des Bois (91) – Bouygues Construction Ile de France / Lafarge Bétons Agency, Ile de France-Trappes plant. (October-December 2008)


• 450 m3 building worksite test on outside walls created for a collective housing building at Colombes ZAC Ile Marante (92) – Bouygues Construction Ile de France / Lafarge Bétons Agency, Ile de France-Nanterre plant. (November 2008 - April 2009) Quille, a Bouygues Construction subsidiary, is starting work on a building site in Le Havre using 1 100 m3 of Thermedia 0.6 B. Bouygues Construction is currently studying 5 possible projects in the Paris region, all of them lowrent collective housing schemes. The product, currently produced in six Lafarge concrete batching plants, will be exclusively reserved for Bouygues Construction and the building sites of its subsidiaries on the market in the Paris region (extended to include Normandy), over the next two years.

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