Influence of coarse aggregate angularity on the mechanical performance of cement-based materials. (20th April 2019)

• Record Type: Journal Article
• Authors: Lee, Seung Jae; Lee, Chang Hoon; Shin, Moochul; Bhattacharya, Sumana; Su, Yu Feng
• Is Part Of: Construction & building materials. Volume 204(2019)
• Page Start: 184
• Page End: 192
• Publication Date: 2019-04-20
• Subjects: Morphology -- Aggregate angularity -- Coarse aggregate -- Cement-based materials -- Sphericity -- Roundness -- Image-based morphology analysis; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2019.01.135
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Morphological factors of two different types of aggregate are systemically quantified using an image-based morphology analysis. Three hypotheses are postulated to elaborate the angularity-dependent behavior of CBM. Particle surface area is a critical mediator correlating the morphology with the mechanical performance. Angular aggregate 'negatively' impacts the small-strain material performance. Angular aggregate 'positively' impacts the ultimate state property. Abstract: This study aims to fundamentally understand the influence of angularity of coarse aggregate on the mechanical performance of cement-based materials. Three hypotheses are postulated to address the influence of aggregate angularity that negatively impacts the small-strain performances, while positively influences the property in the ultimate state at a large strain level. The morphology of two types of coarse aggregates is systemically quantified using an image-based analysis. This study experimentally corroborates the efficacy of the postulated hypotheses through a set of laboratory tests on cement-based cylinders.