Building with Low-Carbon Concrete Through Canada’s Winter Conditions

Concrete will remain essential to Canada’s infrastructure, from roads, bridges, and public works to housing, energy, and industrial projects. As the industry moves toward lower-carbon materials, one practical question becomes especially important for Canadian jobsites: how can contractors use new concrete mixes safely and productively when colder temperatures slow strength development and compress already tight schedules?

Canada’s Low-Carbon Concrete Transition
Canada’s cement and concrete sector has a clear decarbonization direction. The Roadmap to Net-Zero Carbon Concrete by 2050, developed by the Government of Canada and the Cement Association of Canada, positions low-carbon concrete as a key part of the country’s climate and infrastructure future. The sector’s action plan recognizes that there is no single solution; progress will depend on improvements across cement production, concrete mix design, construction efficiency, carbon capture, and smarter use of materials.

For contractors, this transition is not only a sustainability topic. It is also a planning, quality, productivity, and safety topic. Low-carbon mixes can behave differently than conventional concrete, and those differences become more pronounced during the winter months, when lower ambient temperatures can delay early-age strength development.

Lower-Carbon Mixes Can Change Jobsite Assumptions
There are 3 primary ways to reduce CO2 emissions in concrete production. The first focuses on optimizing cement production through alternative fuels, energy efficiency, and emerging technologies such as carbon capture. The second involves advances in concrete technology, including mix designs that reduce material demand or lower the clinker content of cement. The third is the development of alternative binders and supplementary cementitious materials, such as calcined clays, geopolymers, and Portland-limestone cement.

Why Winter Changes the Equation
New clinker-reduced cements and alternative binders do not always perform like conventional mixes. They may require adjusted concrete compositions to meet project-specific technical requirements, and they can develop compressive and tensile strength more slowly, particularly in cold or fluctuating temperatures.

This matters on site because formwork decisions are closely tied to concrete behavior. If strength development is slower than expected stripping times may need to change. Pouring speed, lift heights, curing plans, and assumed fresh concrete pressure may also require adjustment. In winter, relying on familiar rules of thumb, such as pouring in the afternoon and stripping the next morning, can create avoidable risks.

Slower hydration is not always negative. In some cases, it can support concrete quality and reduce cracking risk. The challenge for contractors is balancing quality, safety, sustainability, and schedule certainty, especially when winter conditions leave less margin for guesswork.

Digital Formwork Technology Supports Better Decisions
This is where digital solutions can help make low-carbon concrete more practical for Canadian jobsites. Reliable information about concrete temperature and strength development gives project teams a clearer basis for decisions instead of depending only on estimates or fixed schedules.

Doka’s Concremote uses sensors to measure concrete temperature and calculate compressive strength development. Through real-time data available via app or web portal, contractors can better determine stripping times, curing requirements, prestressing readiness, and other critical operations. Sensor-based solutions such as DokaXact Pressure can also support more controlled use of formwork and in-situ concrete work by improving visibility into jobsite conditions.

For winter construction, the value is straightforward: the team can see how the concrete is actually developing, rather than assuming that a conventional timeline still applies. That visibility can help reduce delays, support safer stripping decisions, and create more confidence when lower-carbon mixes are used in cooler conditions.

Another development is intelligent heated formwork, which is designed to provide targeted heat to support early strength development in CO2-reduced concrete. Doka’s intelligent heated formwork prototype has already been tested in the Austrian research project “Reduced Carbon Concrete – RCC2” and on cold-weather applications, showing how heating and monitoring can work together to help low-carbon concrete perform more reliably on site.

A Cold-Climate Example from Norway
A strong example comes from Cissi Klein Upper Secondary School in Trondheim, Norway, where the project team used a CEM III- cement for a very low-carbon concrete mix together with Doka’s intelligent heated formwork prototype in severe winter conditions. The approach reduced CO2 emissions by more than 50% compared with traditional concrete while demonstrating that low-carbon concrete can be placed successfully in sub-zero temperatures when supported by the right technology and planning.

For Canada’s infrastructure sector, the message is timely. Low-carbon concrete is becoming more important, but successful adoption will depend on practical tools that help contractors manage real jobsite variables, particularly in winter. By combining better mix design, real-time monitoring, smart formwork solutions, and targeted heating where needed, the industry can continue lowering carbon impacts while maintaining the safety, quality, and productivity that Canadian projects require.

Source: Doka

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