Modelling the drying shrinkage of concrete made with limestone-rich cements

Concrete as the most common building material of our time is responsible for about 6% of total anthropogenic CO2 emission. Reduction of Portland cement clinker and replacement with ground limestone was identified as an efficient solution to reduce the environmental impacts of concrete. Preliminary s...

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Bibliographic Details
Published in:Cement and concrete research 2019-01, Vol.115, p.160-175
Main Authors: Rezvani, Moien, Proske, Tilo, Graubner, Carl-Alexander
Format: Article
Language:English
Subjects:
Alkali oxide content
Alkalies
Capillary pressure
Cement
Clinker
Construction materials
Disjoining pressure
Drying
Drying shrinkage
Emissions control
Environmental impact
Human influences
Limestone
Limestone-rich cements
Methylene blue value
Mineralogy
Organic chemistry
Porous materials
Portland cements
Shrinkage
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Summary:Concrete as the most common building material of our time is responsible for about 6% of total anthropogenic CO2 emission. Reduction of Portland cement clinker and replacement with ground limestone was identified as an efficient solution to reduce the environmental impacts of concrete. Preliminary studies showed that drying shrinkage of concretes made of limestone-rich cements is significantly affected by the content and the chemical-mineralogical characteristics of ground limestone. Meanwhile, it was concluded that available prediction models are unable to predict the drying shrinkage of concrete with high limestone contents precisely, especially for limestones with different chemical-mineralogical properties. In this paper, an analytical model is proposed based on the mechanics of porous materials and thermodynamic laws to predict the drying shrinkage of concrete made with cements containing limestone up to 70 wt.‐%. Specifically, this model considers the influence of content and chemical-mineralogical properties of limestone on the drying shrinkage.
ISSN:0008-8846
1873-3948
DOI:10.1016/j.cemconres.2018.09.003