1.7 Uses alternative binders

from The Little Green Book of Concrete

1.4 Being closer means using less carbon

Today’s precast products incorporate materials such as blast furnace slag (GGBS) from the steel industry and fuel ash (PFA) from coal-fired power stations that might otherwise go to waste. As a rule of thumb:

• Substituting 50% of cement with GGBS = 40% less CO2; • Substituting 30% of cement with PFA = 20% less CO2.

These materials can improve the environmental performance of concrete and it is now possible to specify products with over 70% replacement material. Materials like microsilica, glass, limestone powder and china clay waste can also replace Portland cement or primary aggregates.

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1.7 Uses alternative binders

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1.4 Being closer means using less carbon

More articles from this publication:

1.4 Being closer means using less carbon

1.5 Uses cementitious materials from a responsible industry

1.2 ...and operational energy

1.1 Minimises embodied CO2

1.3 Efficient design of concrete structures

1.8 Achieving low-carbon concrete mix

1.9 A range of alternative reinforcements

This article is from:

The Little Green Book of Concrete