Rheology of High-Volume Fly Ash Self-Compacting Recycled Aggregate Concrete
- 1 October 2021
- journal article
- research article
- Published by American Society of Civil Engineers (ASCE) in Journal of Materials in Civil Engineering
- Vol. 33 (10), 04021280
- https://doi.org/10.1061/(asce)mt.1943-5533.0003907
Abstract
Effect of selected volumetric replacement (0%, 20%, 40%, and 60%) of cement with class-F fly ash in a binary binder and of three water-cementitious material ratios (0.40, 0.34, and 0.28) on rheology of self-compacting concrete (SCC) has been investigated using a coaxial concrete rheometer. The effects of the same parameters have also been studied on self-compacting recycled aggregate Concretes (SCRACs) made with 100% volumetric replacement of natural coarse aggregates with coarse recycled concrete aggregates. Data obtained from the flow-curve tests were used to calibrate selected rheological models, and it was noted that degree of shear-thinning in the SCCs and SCRACs was inversely proportional to fly ash dosage. Shear-thinning rheology transitioned to shear-thickening as the water-cementitious material ratio decreased from 0.40 to 0.28, and other mix characteristics remaining unchanged. Degree of shear thinning further decreased (in terms of increase in flow index of HB model and c/μ parameter of MB model) upon substitution of the natural coarse aggregates of SCCs with the coarse recycled aggregates in the SCRACs. Predictive efficacies of the selected rheological models are shown to be similar, and useful correlations between them have been proposed.Keywords
This publication has 33 references indexed in Scilit:
- Durable Performance of Recycled Concrete Using Coarse and Fine Recycled Concrete Aggregates in Air EnvironmentAdvanced Materials Research, 2011
- Integration approach of the Couette inverse problem of powder type self-compacting concrete in a wide-gap concentric cylinder rheometerJournal of Non-Newtonian Fluid Mechanics, 2008
- The effect of fly ash and limestone fillers on the viscosity and compressive strength of self-compacting repair mortarsCement and Concrete Research, 2006
- Medium strength self-compacting concrete containing fly ash: Modelling using factorial experimental plansCement and Concrete Research, 2004
- Assessment of recycling process induced damage sensitivity of recycled concrete aggregatesCement and Concrete Research, 2004
- Analytical models for estimating yield stress of high-performance pseudoplastic groutCement and Concrete Research, 2001
- Study of the shear thickening effect of superplasticizers on the rheological behaviour of cement pastes containing or not mineral additivesCement and Concrete Research, 2000
- Self-compacting concreteStructural Concrete, 2000
- Fresh concrete: A Herschel-Bulkley materialMaterials and Structures, 1998
- Flow simulation of fresh concrete subjected to vibrationMagazine of Concrete Research, 1990