Rheological characterisation of cold bitumen emulsion slurries

Mignini, Chiara; Lo Presti, Davide; Airey, Gordon; Graziani, Andrea

Abstract

The performance of cold bitumen emulsion (CBE) mixtures is strongly linked to an optimised design of the binder blends and mastics. Types and dosages of bitumen, mineral additions and the workability must be characterised and optimised. This study aims at providing an approach for the fundamental characterisation of CBE materials using rotational viscometry. Firstly, a procedure for measuring the viscosity of CBE slurries using the Brookfield viscometer was investigated by comparing results obtained by using a traditional spindle geometry and a novel impeller engineered to avoid phase separation: the dual helical ribbon (DHR). Afterwards, the effect of mineral additions and bitumen emulsions types was measured and modelled, also considering the influence of their concentration. The Krieger-Dougherty model proved to be a powerful tool to fit results and provide fundamental parameters for improved CBE materials engineering characterisation. Overall, the DHR was found a promising tool for CBE slurries rheological characterisation.

Citation

Mignini, C., Lo Presti, D., Airey, G., & Graziani, A. (2021). Rheological characterisation of cold bitumen emulsion slurries. Road Materials and Pavement Design, 22(Sup1), S232-S250. https://doi.org/10.1080/14680629.2021.1906303

• Journal Article Type: Article
• Acceptance Date: Mar 16, 2021
• Online Publication Date: Mar 30, 2021
• Publication Date: Mar 30, 2021
• Deposit Date: Apr 8, 2021
• Publicly Available Date: Mar 31, 2022
• Journal: Road Materials and Pavement Design
• Print ISSN: 1468-0629
• Electronic ISSN: 2164-7402
• Publisher: Taylor and Francis
• Peer Reviewed: Peer Reviewed
• Volume: 22
• Issue: Sup1
• Pages: S232-S250
• DOI: https://doi.org/10.1080/14680629.2021.1906303
• Keywords: Civil and Structural Engineering
• Public URL: https://nottingham-repository.worktribe.com/output/5433486
• Publisher URL: https://www.tandfonline.com/doi/abs/10.1080/14680629.2021.1906303?journalCode=trmp20
• Additional Information: Peer Review Statement: The publishing and review policy for this title is described in its Aims & Scope.; Aim & Scope: http://www.tandfonline.com/action/journalInformation?show=aimsScope&journalCode=trmp20; Received: 2020-07-31; Accepted: 2021-03-16; Published: 2021-03-30