Mohammad Jobaer Uddin, Marllon Daniel Cook, M. Tyler Ley, Riyadh Altuki
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引用次数: 0
Abstract
Paste properties and aggregate proportioning strongly influence the workability, strength, cost, and sustainability of concrete. However, current design methods provide limited guidance on linking paste requirements with aggregate gradation to achieve the required workability. This study addresses that gap by identifying a parabolic relationship between workability and fine sand content (0.6-–0.075 mm), evaluated using slump, viscosity, yield stress, and finishability. The influence of paste volume, water-to-cementitious material ratio (w/cm), and water reducer dosage on the optimal fine sand content is also examined. The results focus on concrete with slump values between 75 and 200 mm. Practical guidance is offered to adjust these parameters for improved workability with minimal paste. The findings suggest a new approach to mixture proportioning that reduces paste demand while enhancing durability, lowering cost, and improving sustainability.
期刊介绍：
Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.
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