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Packing Density-Based Rheological Analysis of Self-consolidating Concrete Containing Mineral and Chemical Admixtures
https://orcid.org/http://orcid.org/0000-0002-6105-5991
This paper presents an experimental study on the relationship between the packing density of solid particles and the workability and rheology of self-consolidating concrete (SCC). The rheological properties of SCC mixtures were measured by a coaxial rheometer (of the ICAR type, which is the most advanced technology in calculating rheological properties). Ten SCC powder mixtures with different packing densities were prepared with the addition of silica fume, metakaolin, fly ash, and low-activity-granulated blast furnace slag as a substitute for Portland cement. Also, air-entraining admixtures (AEA) were used in the three mixtures. Results demonstrated that the reduction in the ratio of water to cementitious materials increased the mixtures' viscosity and yield stress. The lowest viscosity and yield stress values relate to the AEA and fly ash-containing mixtures. This is because of the spherical shape of fly ash particles and the deliberate air bubbles caused by adding AEA, which act like pellets within the mixture, leading to improved flow rate and reduced viscosity. Results also show a good relationship between the mixtures' packing of particles and the yield stress; however, there was no clear relationship between the plastic viscosity of mixtures and packing density.
Packing Density-Based Rheological Analysis of Self-consolidating Concrete Containing Mineral and Chemical Admixtures
https://orcid.org/http://orcid.org/0000-0002-6105-5991
This paper presents an experimental study on the relationship between the packing density of solid particles and the workability and rheology of self-consolidating concrete (SCC). The rheological properties of SCC mixtures were measured by a coaxial rheometer (of the ICAR type, which is the most advanced technology in calculating rheological properties). Ten SCC powder mixtures with different packing densities were prepared with the addition of silica fume, metakaolin, fly ash, and low-activity-granulated blast furnace slag as a substitute for Portland cement. Also, air-entraining admixtures (AEA) were used in the three mixtures. Results demonstrated that the reduction in the ratio of water to cementitious materials increased the mixtures' viscosity and yield stress. The lowest viscosity and yield stress values relate to the AEA and fly ash-containing mixtures. This is because of the spherical shape of fly ash particles and the deliberate air bubbles caused by adding AEA, which act like pellets within the mixture, leading to improved flow rate and reduced viscosity. Results also show a good relationship between the mixtures' packing of particles and the yield stress; however, there was no clear relationship between the plastic viscosity of mixtures and packing density.
Packing Density-Based Rheological Analysis of Self-consolidating Concrete Containing Mineral and Chemical Admixtures
https://orcid.org/http://orcid.org/0000-0002-6105-5991
This paper presents an experimental study on the relationship between the packing density of solid particles and the workability and rheology of self-consolidating concrete (SCC). The rheological properties of SCC mixtures were measured by a coaxial rheometer (of the ICAR type, which is the most advanced technology in calculating rheological properties). Ten SCC powder mixtures with different packing densities were prepared with the addition of silica fume, metakaolin, fly ash, and low-activity-granulated blast furnace slag as a substitute for Portland cement. Also, air-entraining admixtures (AEA) were used in the three mixtures. Results demonstrated that the reduction in the ratio of water to cementitious materials increased the mixtures' viscosity and yield stress. The lowest viscosity and yield stress values relate to the AEA and fly ash-containing mixtures. This is because of the spherical shape of fly ash particles and the deliberate air bubbles caused by adding AEA, which act like pellets within the mixture, leading to improved flow rate and reduced viscosity. Results also show a good relationship between the mixtures' packing of particles and the yield stress; however, there was no clear relationship between the plastic viscosity of mixtures and packing density.
Packing Density-Based Rheological Analysis of Self-consolidating Concrete Containing Mineral and Chemical Admixtures
Iran J Sci Technol Trans Civ Eng
Shirzadi Javid, Ali Akbar (author) / Hayati, Parham (author) / Badiee (Gavarti), Amirabbas (author)
2023-10-01
12 pages
Article (Journal)
Electronic Resource
English
Rheological properties of self consolidating concrete with various mineral admixtures
| British Library Online Contents | 2014
| British Library Online Contents | 2014