Rheological behavior of fresh cement pastes with a graphene oxide additive

doi:10.1016/S1872-5805(16)60033-1

New Carbon Materials

Volume 31, Issue 6, December 2016, Pages 574-584

https://doi.org/10.1016/S1872-5805(16)60033-1 Get rights and content

Abstract

The rheological properties and morphology of fresh cement pastes with different contents of graphene oxide (GO) were investigated by a rheometer and a laser confocal scanning microscope, respectively. The rheological data were fitted by the Modified-Bingham (M-B) model and Herschel-Bulkley (H-B) model. A mechanism for the effect of GO on the rheological properties is proposed. Results show that the cement particles are re-agglomerated and new flocculation structures are generated by the addition of GO. The new flocculation structures significantly alter the rheological properties of the pastes. The degree of re-agglomeration and the number of new flocculation structures increase with increasing GO content, leading to a sharp increase in the yield stress, plastic viscosity and the area of the hysteresis loop. GO can effectively reduce the degree of shear-thickening, and increase the critical shear rate and the stability of the pastes.

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RESEARCH PAPERRheological behavior of fresh cement pastes with a graphene oxide additive

Abstract

Construction and Building Materials

Construction and Building Materials

Cement and Concrete Composites

Cement & Concrete Research

Cement and Concrete Composites

Construction and Building Materials

Construction and Building Materials

Cement and Concrete Research

Construction and Building Materials

Construction and Building Materials

New Carbon Materials

Cement and Concrete Composites

New Carbon Materials

Construction and Building Materials

Construction and Building Materials

Construction and Building Materials

RESEARCH PAPER
Rheological behavior of fresh cement pastes with a graphene oxide additive