Blended mortars: Influence of the constituents and proportioning in the fresh state

•The fresh state of blended Portland cement-hydrated lime mortars was evaluated.•The relation between consistency index and initial shear stress is inverse.•Mortars with calcitic hydrated lime presented a higher consistency index.•The initial shear stress is lower in mortars with well-graded aggrega...

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Bibliographic Details
Published in:Construction & building materials 2019-06, Vol.210, p.574-587
Main Authors: Giordani, Caroline, Masuero, Angela Borges
Format: Article
Language:English
Subjects:
Analysis
Cements (Building materials)
Consistency index
Fresh state
Granulometric composition
Hydrated lime
Mortar
Proportioning
Refractory mortars
Rheology
Rotational rheometry
Spindle vane
Water
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Summary:•The fresh state of blended Portland cement-hydrated lime mortars was evaluated.•The relation between consistency index and initial shear stress is inverse.•Mortars with calcitic hydrated lime presented a higher consistency index.•The initial shear stress is lower in mortars with well-graded aggregate.•The increase of lime or aggregate in the proportion reduces the consistency index. The fresh state of blended Portland cement-hydrated lime mortars is evaluated through the tests of consistency index and rotational rheometry. The mortars were dosed with different proportions (cement, hydrated lime, aggregate and water), types of hydrated lime (calcitic or dolomitic) and aggregate granulometric compositions. It was identified that mortars with less hydrated lime, lower aggregate content or higher water content, as well as those composed of calcitic hydrated lime or well graded aggregate, presented a higher consistency index and lower initial shear stress, compared to the others.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2019.02.077