Green Credentials (BREEAM)
With a growing emphasis these days on environmental protection, Steintec has released information to highlight its own commitment to delivering low energy mortars and low carbon construction.
Due to a triple, energy-saving combination of fewer binders, a reduced requirement for drying and significantly lower shipping costs than any other brand, using tuffbau mortars can reduce CO2 emissions by up to 188kg per tonne. That’s the equivalent of some 1,465 km travelled by the average car.
BREEAM and SteinTec
The BREEAM Green Guide to Specification allocates ratings to systems of pavement construction.
The greatest environmental impact by far is determined by the choice of paving unit and base materials. Although bedding and jointing mortars are a critical component within these systems they also represent a relatively small proportion of the overall volume of material contained in a finished pavement. Therefore they are not allocated individual ratings in the BREEAM Green Guide.
Despite this, the specifier should be aware that at the heart of our products is “structure first technology”, using 30% to 50% less binder whilst delivering outstanding structural performance. This ensures our products achieve a responsible balance between product performance and environmental impact.
tuffbau mortars use up to 50 percent less binding per tonne, the equivalent saving in CO2 of 128kg. Less binder equals less energy consumed.
Usually, ready mixed mortars are delivered with the aggregate and binder combined, which must be bone dry to prevent the mortar from setting. However, with tuffbed 2-pack, the aggregate and binder are packed separately, which eliminates the energy-intensive requirement for aggregate kiln drying.
Rotary kilns represent the largest energy consumer and carbon dioxide emission source within the cement and concrete industry. Our method saves more than half the energy of normal kiln dryings, equating to 14kg of CO2 saved with every tonne of mortar.Less drying equals less energy.
By separating the binder component from the overall mortar mix, considerable energy savings can be made by eliminating the requirement for kiln drying of aggregates. At Steintec we ship our aggregates wet, reducing the need for additional water in the final mix.
We have worked tirelessly to ensure the cement content of our mortars are kept to an absolute minimum, taking a more scientific approach, rather than throwing together a casual granular blend. Starting at the microscopic scale, we first ensure that the aggregates used in our bedding and jointing mortars follow the ‘structure first principle’.
With the aid of laser scanning techniques and scientific standards of quality control, the aggregates are designed to lock together in a way that provides inherent strength before any binders are added. Our mortars require fewer binders than other brands due to the use of high grade, mineral-rich cementitious ingredients, combined with this natural interlocking.
Lower transportation costs
Stone aggregates are one of the most energy-intensive commodities to ship. Sea Freight is by far the most economical way to transport raw materials but still represents 10-15grams of CO2 per tonne. By separating the bulk of the aggregate component, Steintec mortars need 65 per cent less shipping than other brands, which has a significant environmental saving in CO2 – between 31-46kg per tonne. Less shipping equals less energy.
The attached, detailed presentation shows how Steintec’s calculations have been evaluated. It may be used by specifiers and contractors in any tender submission to reference our green credentials.