A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effective Clinker Replacement Using SCM in Low Clinker Cements
Supplementary cementing materials (SCM) are being widely used for partial clinker replacement. The hydration of cement results in the production of portlandite which in turn reacts with the SCM to produce C-S-H. A combination of SCM and other mineral additives is being used in new ternary and quaternary blends having very low clinker factors. Other similar reactions producing more complex hydration products are known to occur in composite cements. Although sustainability concerns require that clinker factors and the grade of SCM used to be as low as possible, it is the composition of the clinker and the other components that will govern optimal proportions that would lead to highest degrees of hydration possible. While sufficient quantities of hydration products that react with SCM may not be produced at very low clinker factors, the reactive fraction in an SCM may be too low to allow high clinker replacement. This paper studies the case of Limestone Calcined Clay Portland Cement (LC3) to understand how the clinker and SCM compositions would affect the possible replacement levels. It is demonstrated how a scientific approach can be used for the optimal design of low clinker cements.
Effective Clinker Replacement Using SCM in Low Clinker Cements
Supplementary cementing materials (SCM) are being widely used for partial clinker replacement. The hydration of cement results in the production of portlandite which in turn reacts with the SCM to produce C-S-H. A combination of SCM and other mineral additives is being used in new ternary and quaternary blends having very low clinker factors. Other similar reactions producing more complex hydration products are known to occur in composite cements. Although sustainability concerns require that clinker factors and the grade of SCM used to be as low as possible, it is the composition of the clinker and the other components that will govern optimal proportions that would lead to highest degrees of hydration possible. While sufficient quantities of hydration products that react with SCM may not be produced at very low clinker factors, the reactive fraction in an SCM may be too low to allow high clinker replacement. This paper studies the case of Limestone Calcined Clay Portland Cement (LC3) to understand how the clinker and SCM compositions would affect the possible replacement levels. It is demonstrated how a scientific approach can be used for the optimal design of low clinker cements.
Effective Clinker Replacement Using SCM in Low Clinker Cements
RILEM Bookseries
Scrivener, Karen (editor) / Favier, Aurélie (editor) / Krishnan, Sreejith (author) / Emmanuel, Arun C. (author) / Bishnoi, Shashank (author)
2015-05-08
5 pages
Article/Chapter (Book)
Electronic Resource
English
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