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Mechanical Properties of Hybrid Carbon Fibers Reinforced Modified Foamed Concrete | ||
| Iraqi Journal of Civil Engineering | ||
| Volume 19, Issue 1, June 2025, Pages 60-67 PDF (580.42 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.37650/ijce.2025.190104 | ||
| Authors | ||
| Areej Njyman* ; Ameer A Hilal | ||
| Department of Civil Engineering, College of Engineering, University of Anbar, Ramadi, Iraq. | ||
| Abstract | ||
| Foamed concrete (FC) is a type of lightweight concrete characterized by a high void space ratio and cementitious binders. In this research, the fresh and mechanical properties of fiber-reinforced modified foamed concrete (made with fly ash, silica fume, and superplasticizer) with a density of 1300 kg/m³ were studied. Carbon fibers of different lengths (12 mm, 20 mm, and 28 mm) were introduced in two ways: as single fibers (12 mm) and as hybrid fibers combining lengths of 20 mm and 28 mm. The results showed that the compressive and split tensile strengths increased by approximately 43% compared to the control mix (modified with additives) when using a single fiber of 12 mm at a volume proportion of 0.4%. In contrast, using hybrid fibers resulted in increases of about 65% and 66% in compressive and split tensile strengths, respectively. When compared to the single fiber method, the hybrid approach improved compressive and split tensile strengths by about 15% and 16%, respectively. | ||
| Keywords | ||
| Foamed concrete; carbon fibers; hybrid fibers; mechanical properties | ||
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