Characterization of the shape and size of coarse aggregates by photogrammetry for the design of self-compacting concretes

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-04-09 DOI:10.1016/j.conbuildmat.2025.141013

Ángel De La Rosa , José J. Ortega , Gonzalo Ruiz

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引用次数: 0

Abstract

Geometrical characteristics of coarse aggregates have a direct influence on the rheological properties of self-compacting concretes, with and without fiber reinforcement. In particular, their shape and size are related to their maximum particle packing fraction and their intrinsic viscosity. These parameters intervene in the analytical equation of Krieger and Dougherty, used to obtain the plastic viscosity of fresh concrete as a suspension of particles. However, traditional characterization methods of aggregates have limitations in providing the information necessary to determine them. In this article, photogrammetry is used to define with precision the main particle dimensions of three types of coarse aggregate. It is demonstrated how their morphological characterization can be done by a simple procedure of image processing of the orthophoto of a sample of the aggregates. The provided measurements make it possible to estimate the intrinsic viscosity through the circularity of particles. The results of the size distribution of their minor axis are found to reproduce the granulometric curve of the sieving method. These distributions are used to determine the maximum packing fraction for which, the approximation of different available empirical formulas are also discussed regarding the roundness or angularity of the aggregates.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.