Rheological properties of concrete with manufactured sand: A multi-level prediction. (October 2022)

• Record Type: Journal Article
• Authors: Ren, Qiang; Tao, Yaxin; Jiao, Dengwu; De Schutter, Geert; Jiang, Zhengwu
• Is Part Of: Cement & concrete composites. Volume 133(2022)
• Publication Date: 2022-10
• Subjects: Rheological properties -- Multi-level prediction -- Concrete -- Manufactured sand -- Particle shape; Composite-reinforced concrete -- Periodicals; Concrete -- Periodicals; Composite materials -- Periodicals; Composites de ciment -- Périodiques; Béton -- Périodiques; Composites -- Périodiques; Béton léger -- Périodiques; Cement composites; Composite materials; Composite-reinforced concrete; Concrete; Lightweight concrete; Periodicals; Electronic journals; 620.135
• DOI: 10.1016/j.cemconcomp.2022.104647
• Languages: English
• ISSNs: 0958-9465

Abstract

Abstract: Conventional rheological predictions of concrete were mostly developed based on spherical aggregate assumptions whereas the particle shape of irregular aggregate significantly influences the rheological properties of concrete. In this study, rheological properties of concrete with manufactured sand (MS) are predicted concerning the particle shape of aggregate based on a multi-level biphase assumption. The relative plastic viscosity and relative yield stress at each level are demonstrated to present power-law relationships with the relative thickness of the corresponding suspending media. The proposed models are proved with high accuracy and robustness for predicting the rheological properties of mixtures with MS and coarse aggregate that have various particle shapes and particle size distributions. Based on the proposed predictions, the influences of particle shapes of MS and coarse aggregate on the rheological properties of mixtures can be represented by their effects on the relative paste film thickness (R_PFT) and relative mortar film thickness (R_MFT), respectively. The proposed multi-level prediction lays the foundation of mix proportioning of concrete with irregular aggregate according to the specified rheological requirements.