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Item type:Publication, Use of organic residual ash and PET fibers on the mechanical properties and durability of a solid slab(Springer Science+Business Media, 2026-03-01)Plastic waste and industrial by-products present an increasing environmental challenge due to their accumulation and limited reuse. This study investigates a sustainable alternative by assessing the individual and combined effects of eucalyptus wood ash (EWA) and recycled PET fibers (FPET) on the mechanical properties and durability of concrete for solid slab applications. The innovation lies in combining both organic and plastic waste, a topic rarely explored, particularly in terms of durability. Concrete mixes were designed following ACI 211.1, targeting a compressive strength of 21 MPa. EWA was used as a partial cement replacement at 2.50–4.00% by weight, with the ash ground to pass through a No. 200 sieve (75 µm). FPET fibers, sourced from plastic bottles, were added at 0.15–0.75% by volume, with lengths of 50–60 mm and widths of 2–3 mm, randomly dispersed in the mix. Experimental tests assessed workability, unit weight, air content, and mechanical performance (compressive, tensile, and flexural strength, and elastic modulus). The optimal proportions were identified as 3% EWA and 0.75% FPET, yielding the best mechanical performance. These mixes were used to prepare cylindrical slab specimens (0.80 m diameter × 0.075 m height) to evaluate durability through impact energy, electrical resistivity, water absorption, and water penetration. At 28 days, the results showed a 12.05% reduction in water absorption, a 15.89% decrease in water penetration under pressure, and a 19% increase in electrical resistivity. The combined use of EWA and FPET enhanced ductility, energy absorption, and impermeability, highlighting their synergistic effect and potential as eco-efficient materials for durable concrete applications.2 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of Peruvian sisal fiber on the mechanical and microstructural strength of concrete(Springer Science+Business Media, 2025-06-01)In response to environmental concerns, such as global warming, there has been growing interest in the development of sisal fiber (SF)-reinforced concrete due to its low environmental impact and reduced cost. This study evaluated the effect of SF on the mechanical and microstructural properties of concrete. Sisal fibers, with a length of 50 mm, were selected and added to concrete at 0.5, 1, 1.5, 1.5, and 2% by weight of cement, with a treatment using CaO for 7 days. A total of 80 specimens were prepared to analyze compressive strength, tensile strength, flexural strength, elastic modulus, and microstructural properties. The results showed that the optimum SF content was 1.5%, where parameters such as workability, unit weight, and air content decreased but remained within permissible ranges, while temperature remained constant. Significant improvements were observed in compressive, tensile, and flexural strengths, with increases of 17.80%, 52.30%, and 88.83%, respectively. However, a 5.56% reduction was observed in the elastic modulus compared to the reference concrete. X-ray diffraction analysis revealed changes in the concentrations of crystalline phases such as quartz and albite, while energy dispersive spectroscopy highlighted a higher oxygen content, indicating more efficient hydration of the cement. The 1.5% SF (T4) optimizes cost–benefit (+ 88.8%), but higher doses reduce efficiency. It is ideal for walls and sidewalks, prioritizing resistance to cracking and sustainability. SF is eco-efficient and economical compared to synthetic fibers. This demonstrates that the incorporation of SF into concrete represents a sustainable and efficient alternative that significantly improves its mechanical and microstructural properties.5