Effect of Mixture Composition on Concrete Impact Resistance Under Subnormal Temperatures
Volume Title: ICASGE2025
Paper ID : 1116-ICASGE-FULL (R1)
Authors
Department of Civil Engineering, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, Canada.
Abstract
This study investigated the effect of subnormal temperatures on the compressive strength and impact resistance of concrete mixtures with varying compositions. The concrete mixtures were tested under compression and drop-weight impact loading at four different temperatures (+20°C, 0°C, -10°C, and -20°C) and varied in coarse aggregate size (10 mm and 20 mm), coarse-to-fine (C/F) aggregate ratio (0.7 and 2), and binder content (250 kg/m³ and 500 kg/m³). The primary objective was to assess how these factors influenced concrete's behavior under cold conditions, with impact resistance evaluated for both cylindrical and beam specimens. The results showed that both compressive strength and impact resistance generally improved as the temperature decreased, particularly at subzero temperatures. Coarse aggregate size had minimal effect on performance at subnormal temperatures, but mixtures with higher C/F ratios demonstrated more substantial benefits. Additionally, as binder content decreased, the influence of subnormal temperatures on concrete's mechanical properties became more pronounced.
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