A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Increasing the Strength of Concretes Made with Blended Cements
To lower the carbon footprint of concrete structures, blended cements are increasingly replacing ordinary portland cements in North America. The environmental gains are significant, as the substitution of each kilogram of portland cement clinker results in a decrease of about 0.8 kg (1.8 lb) of CO2 emissions associated with cement production. Blended cements (binders) contain fillers or supplementary cementitious materials (SCMs), which are less reactive than the portland cement, change the hydration process, and thus reduce the early compressive strengths. There are at least two different ways to increase the early compressive strength of blended cements. The chemical approach consists of increasing the fineness of the cement and the content of C3S and C3A in the clinker. This approach solves the short-term strength problem, but it does not improve the long-term strength of blended cements; it may also lead to less durable concretes.
Increasing the Strength of Concretes Made with Blended Cements
To lower the carbon footprint of concrete structures, blended cements are increasingly replacing ordinary portland cements in North America. The environmental gains are significant, as the substitution of each kilogram of portland cement clinker results in a decrease of about 0.8 kg (1.8 lb) of CO2 emissions associated with cement production. Blended cements (binders) contain fillers or supplementary cementitious materials (SCMs), which are less reactive than the portland cement, change the hydration process, and thus reduce the early compressive strengths. There are at least two different ways to increase the early compressive strength of blended cements. The chemical approach consists of increasing the fineness of the cement and the content of C3S and C3A in the clinker. This approach solves the short-term strength problem, but it does not improve the long-term strength of blended cements; it may also lead to less durable concretes.
Increasing the Strength of Concretes Made with Blended Cements
Pierre-Claude Aïtcin (author) / William Wilson / Sidney Mindess
2016
Article (Journal)
English
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