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Rheological properties of micromortars containing fines from manufactured aggregates
Swedish Cement and Concrete Research Institute.
Swedish Cement and Concrete Research Institute.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
2007 (English)In: Materials and Structures, ISSN 1359-5997, E-ISSN 1871-6873, Vol. 40, no 6, p. 615-625Article in journal (Refereed) Published
Abstract [en]

This paper concerns the influence of fines from manufactured aggregates on the rheological properties of the micromortar phase of concrete. Fines from nine different aggregates were included in the experimental work. The zeta potential of five of them was measured at different additions of superplasticizer in order to study the interaction between the surface of the fines and the superplasticizer. The rheological properties of the micromortars were studied at different volume concentrations of fines and at different concentrations in the paste phase, i.e., w/c ratios. Furthermore, the micromortars were studied at different dosages of a superplasticizer. The results show that the fines have different surface properties, i.e., zeta potential, and indicate that the superplasticizer only is adsorbed on some of them. The results from the rheological characterisation of the micromortars indicate that the higher water demand of concrete with manufactured aggregates partly can be traced to the properties of the micromortar phase of the concrete.

Place, publisher, year, edition, pages
2007. Vol. 40, no 6, p. 615-625
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-8175DOI: 10.1617/s11527-006-9173-1ISI: 000244454700007Scopus ID: 2-s2.0-34548265186Local ID: 6a477250-9838-11dc-8ccb-000ea68e967bOAI: oai:DiVA.org:ltu-8175DiVA, id: diva2:981066
Note
Validerad; 2007; 20071121 (palle)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Forssberg, Eric

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