Effect of various plasticisers on viscous flow properties of natural pozzolanic cement pastes

The effect of various plasticisers (lignosulfonates and copolymers) on volcanic cement was assessed in this study. The volcanic cement was designed by substituting Portland cement with a natural volcanic pozzolan resulting from Andean volcanic activity. The best results (i.e. the volcanic cement pas...

Full description

Saved in:
Bibliographic Details
Published in:Advances in cement research 2020-01, Vol.32 (1), p.20-29
Main Authors: Páez-Flor, Nicolás M., Rubio-Hernández, Francisco J., Velázquez-Navarro, José F.
Format: Article
Language:English
Subjects:
Cement
Cement paste
Lignosulfonates
Plasticizers
Portland cements
Pozzolanic cements
Shear rate
Shear thickening (liquids)
Shear viscosity
Thickening
Viscosity
Viscous flow
Volcanic activity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The effect of various plasticisers (lignosulfonates and copolymers) on volcanic cement was assessed in this study. The volcanic cement was designed by substituting Portland cement with a natural volcanic pozzolan resulting from Andean volcanic activity. The best results (i.e. the volcanic cement pastes that showed shear-thickening viscous flow behaviour) were obtained when the zero-shear viscosity, minimum viscosity and shear rate for the onset of shear-thickening behaviour showed dependency on the paste concentration, Portland cement substitution and plasticiser concentration. The results were verified by the distorting effect of solid particles on the flow field.
ISSN:0951-7197
1751-7605
DOI:10.1680/jadcr.18.00058