Rheological benefits of biomass fly ash as filler replacement in cement-based materials

IF 6.5 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Case Studies in Construction Materials Pub Date : 2024-12-21 DOI:10.1016/j.cscm.2024.e04133

Yannick Vanhove, Joella Grâce Dossa, Jonathan Page, Chafika Djelal

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Abstract

Biomass Fly Ash (BFA) represents a significant waste, which needs to find a new way of recovery. Their use as replacement for cement remains difficult because these ashes are generally non-reactive and lead to low resistance for cementitious materials. This study explores the feasibility of valorizing these biomass ashes as replacement for limestone filler, generally used in concrete to improve rheological stability of mixtures. An experimental program, based on a progressive replacement of limestone filler (LF) with biomass ash, is proposed. The rheological behavior of BFA were studied from a Blast Furnace Slag cement (BFS) and an ordinary Portland cement (OPC). The incorporation of BFA in replacement of LF increase the non-linearity of flow behavior depending of the shear rate intensity. A loss of workability with BFA is observed, associated to the difference in water demand between BFA and LF. In addition, BFA-based mixtures present more shear thinning behavior in comparison with the limestone filler. This study provides a rheological basis for functional aspects of a possible replacement of limestone filler by BFA in the future and demonstrates the use of BFA can improve working performance of cement-based materials.

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来源期刊

Case Studies in Construction Materials Multiple-

CiteScore

7.60

自引率

19.40%

发文量

842

审稿时长

63 days

期刊介绍： Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials. In addition, the journal also publishes related Short Communications, Full length research article and Comprehensive review papers (by invitation). The journal will provide an essential compendium of case studies for practicing engineers, designers, researchers and other practitioners who are interested in all aspects construction materials. The journal will publish new and novel case studies, but will also provide a forum for the publication of high quality descriptions of classic construction material problems and solutions.