“With the new target to cut EU greenhouse gas emissions by at least 55% by 2030, we will lead the way to a cleaner planet and a green recovery.”
“The European Green Deal is our new growth strategy. It will help us cut emissions while creating jobs.”
Ursula von der Leyen, President of the European Commission
We all agree that climate change and environmental degradation are a serious threat to our planet. Reducing the carbon footprint of buildings, transportation or our lifestyle is a challenge we all face every day. To overcome these challenges, Europe is engaged in ambitious plans to make its economy more sustainable, as Ursula von der Leyen, President of the European Commission, states.
Buildings and construction together account for 36% of global final energy use and 39% of energy-related carbon dioxide (CO2) emissions when upstream power generation is included. (1) Concrete is one of the biggest contributors to the carbon footprint of buildings and infrastructure:
The main environmental impact of concrete occurs during manufacture, especially the production of cementitious binder, reinforcing steel, mining and transport of aggregates, and, not to forget, the energy used to transport the concrete to the job site.
Reducing the impact of concrete and the construction industry will become even more important in coming years as rapid urbanization and economic development increases demand for new buildings and, thus, for concrete and cement. Concrete is also the most commonly used material for infrastructure, helping to provide clean water, sanitation, energy and transportation, wind farms and hydroelectric dams, with demand for renewable energy infrastructure is set to increase due to clean energy commitments from countries and organizations.
With this is mind, it does not come as a surprise that cement, concrete and chemicals producers are developing several initiatives to reduce the environmental impact of concrete. The development of “green concrete”, with reduced environmental impact, is an important step towards a sustainable construction industry.
✔️ | Reduction of energy consumption and fossil fuels used to heat the cement kilns to achieve the reaction temperatures. |
✔️ | CO2 captured by breaking down calcium carbonate into calcium oxide during cement production. |
✔️ | Use of industrial by-products (e.g. blast furnace slag or fly ash) as cement replacements. |
✔️ | Use of admixtures to produce concrete that has higher mechanical strength, reduced shrinkage, faster hardening, or easier placement, reducing installation mistakes, etc. |
✔️ | Use of recycled aggregates from construction and demolition waste (C&DW) that could save up to ten times more CO2 emissions than virgin aggregates. |
The answer is YES.
The International Concrete Repair Institute (ICRI) Committee 160 in the document “Sustainability for repairing and maintaining concrete and masonry buildings”, outlines the two most important ways to lower the carbon footprint of concrete construction:
“Much of the life-cycle cost and comparatively low environmental impact of concrete are due to its longevity, and extension of that longevity further enhances these benefits”
“Protective measures during construction and proactive maintenance can prevent the need for repairs and are ultimately the most sustainable approach.”
Water must be present for most of the degradation processes that affect reinforced concrete (carbonation, acids, sulphates, chlorides…) and, apart from meeting functional requirements for structures, this is why waterproofing membranes have an important contribution to the durability of concrete, preventing water and aggressive substances from penetrating into the concrete matrix.
MasterSeal 6100 FX is a sustainable, one component, highly elastic cementitious waterproofing membrane with low consumption that needs only 1.85 kg of powder product to achieve 2 mm applied thickness It provides high performance properties including resistance to 5 bar of water pressure and A4 class crack bridging capacity.
To find out more about MasterSeal 6100 FX and sustainability:
MasterSeal 6100FX product page including technical data sheets, declaration of performance
Sustainability website of Master Builders Solutions with best practices of different building types
3 Aspects of Green Buildings, recommended blog post highlighting the opportunities in the construction industry to contribute to the rise of sustainable construction
1mio m² waterproofed concrete - saving 1,7 mio kg CO2eq, long-term success story of MasterSeal 6100 FX achieving a major milestone in making concrete structures more sustainable
References
(1) UN Environment and International Energy Agency (2017): “Towards a zero-emission, efficient, and resilient buildings and construction sector. Global Status Report 2017.”
(2) J. Lehne, F. Preston. “Making Concrete Change. Innovation in Low-carbon Cement and Concrete”. Energy, Environment and Resources Department. Chatham House report. June 2018.
(3) MPA The Concrete Centre. “Concrete Industry Sustainability Performance Report”. 12th report: 2018 performance data. www.sustainableconcrete.org.uk.
(4) Vemund Årskog (Ålesund College, Norway), Sverre Fossdal (Norwegian Building Research Institute, Norway) and Odd E. Gjørv (Norwegian University of Science and Technology, Norway). “Life Cycle Assessment of repair and maintenance systems for concrete structures”. International Workshop on Sustainable Development and Concrete Technology. 2004