How quarry waste limestone filler affects the rheological behavior of cement-based materials

Applied Rheology

Benabed Benchaa¹  Soualhi Hamza¹  Kadri El-Hadj²  Amokrane Kamel³  Debieb Farid³  Safiddine Salim³ 

[1] Civil Engineering Research Laboratory (LRGC), University of Amar Telidji, P.O. Box 37G, Laghouat, Algeria;Laboratory L2MGC, University of Cergy Pontoise, F9500, Cergy Pontoise, France;Materials and Environmental Laboratory (LME), University of Yahia Fares, 26000, Medea, Algeria;

关键词: limestone filler;    yield stress;    viscosity;    grout;    mortar;    concrete;   

DOI  :  10.1515/arh-2020-0118

来源: DOAJ

【 摘 要 】

The main objective of this work is to highlight experimentally the effect of quarry waste limestone fillers (LF) on the rheological properties of concrete. All mixtures were made with water-to-cement ratio (W/C) of 0.50. The method adopted based on the rheological behavior of concrete incorporating LF as a partial substitute for sand in multi-scale systems (concrete, mortar, grout and LF suspension). The replacement ratio of sand by LF ranged from 0% to 20% (by weight of sand) in concrete and mortar. Whereas, the addition of LF varied from 0% to 60% (by weight of cement) in cement grout. The rheological behavior of concrete and mortar was modeled by the Bingham model with sufficient precision. However, the cement grout shows a nonlinear behavior, which was modeled by the Herschel-Bulkley model. Results indicate that the use of LF has a significant effect on the superplasticizer (Sp) demand of concrete and mortar, for a given slump on one hand. On the other hand, an increase in yield stress, apparent viscosity and flow time of cement grout was obtained when LF is incorporated, which results in a loss of fluidity of the suspensions of LF.

【 授权许可】

Unknown