Rheological and mechanical properties of lime-brick powder mortars with expanded clay aggregate
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Date
2018-07-16
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Mark
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IOP Publishing
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Abstract
The rheological behaviour and mechanical properties of lightweight lime-brick
powder mortars with combined expanded clay-sand aggregates are presented in this paper. The
rheological investigation included the characterization of flow properties and viscoelastic
properties of the fresh mortars. Flexural and compressive strengths were determined at 7 and
28 days. These mortars are Non-Newtonian thixotropic liquids with conversion from shearthickening
to shear-thinning behaviour depending on expanded clay aggregate (ECA) content.
Yield stress and consistency coefficient of mortars significantly increase with decreasing
amount of ECA; the mortars become more rigid and more viscous. Some of the mortars
reached higher flexural strengths than similar lime mortars with metakaolin and higher
compressive strengths than pure lime mortars. The lightweight lime-brick powder mortar with
the mass ratio of 1:1 between gravelous sand and ECA was identified as the best among the
analyzed mortars.
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Citation
IOP Conference Series: Materials Science and Engineering. 2018, vol. 385, issue 1, p. 1-6.
http://iopscience.iop.org/article/10.1088/1757-899X/385/1/012063
http://iopscience.iop.org/article/10.1088/1757-899X/385/1/012063
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Peer-reviewed
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en