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Item type:Publication, Reinforced cementitious composite using viscose rayon fiber from textile industry waste(SAGE Publications Ltd, 2022-01-01)This study presents an analysis of the possible use of a viscose rayon (CV) fiber from textile industry wastes to develop a reinforced cementitious composite as an alternative for textile discharge valorization. Several techniques were used to characterize precursor fibrous waste material such as SEM, FT-IR, DSC, and TGA. The experimental studies were conducted based on a conventional cementitious mortar (control) and four different fiber contents (0.5, 1, 2, and 4 wt%). For mechanical behavior analysis, uniaxial compressive strength tests were carried out at different ages (7, 14, and 28 days after production). The results showed favorable CV fiber addition as reinforcement up to a maximum limit. The optimum concentration of fiber was 0.5 wt% (FRC0.5), which provided 28 days of higher compression strength. The addition of CV waste as reinforcement in cementitious matrix resulted in an improved compressive strength above 20.6% compared to the conventional non-reinforced mortar. Furthermore, CV fiber addition improved the ductile behavior of the new composite allowing a controlled failure, even after maximum rupture loading. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Additive construction using enhanced earthen-based composites: Improvement of the mechanical strength and water durability using chitosan and agave fibers(Elsevier Ltd, 2024-01-12)3D printing has emerged as a revolutionary technology with potential applications in the construction industry. However, the prevalent use of ordinary cement in most 3D printing formulations results in significant greenhouse gas emissions during 3D printing construction. In contrast, earthen-based composites are an eco-friendly alternative for building materials. However, as a construction material, earth presents poor mechanical strength and low durability against water erosion. This study aims to obtain earthen-based composites with suitable mechanical and durability properties to investigate their extrudability and buildability in tests. It also explores the effects of incorporating short sisal fibers (l/d ratio = 138.7) and chitosan (DD = 91%, Mw = 598 kDa) to improve strength and water durability in earthen-based composites for 3D printing purposes. Chitosan is a natural macromolecule derived from a waste product from the food industry, whereas sisal fibers are obtained from the Agave sisalana plant. The change in compressive strength was analyzed through uniaxial compression. Water durability was evaluated by measuring the water contact angle, total and capillary water absorption, and accelerated erosion tests. The results indicate that the use of 3.0% (w/v) aqueous solution of chitosan and 1.0% (w/w) of sisal fibers have an important effect on the hardening and water durability properties of earthen-based composites. This study suggests that these materials could serve as natural additives to enhance the mechanical properties and water durability of new eco-friendly construction materials for 3D printing. In conclusion, this study demonstrates that appropriate formulations with natural and eco-friendly additives can lead to stabilized earthen-based composites with suitable printing, mechanical and durability properties for 3D printing applications in construction materials. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Evaluation of Chitosan and Potato Starch as Stabilizers to Improve the Mechanical and Water Durability Properties of Printable Earth-Based Matrices Reinforced with Sisal Fibers(Trans Tech Publications Ltd, 2023-01-01)Due to economic, sustainable, and aesthetic benefits, academia and the construction industry are exploring the use of earth in modern construction is being widely studied. Unfortunately, earth as a construction material has low mechanical, poor water durability resistance, and the potential to swell and crack. Therefore, this paper evaluates chitosan and potato starch, natural biodegradable polymers, as stabilizers to improve mechanical strength and water durability resistance of printable earth-based matrix reinforced with sisal fibers. Although the test results indicated that the chitosan had a better performance as an earth stabilizer than potato starch, adding both stabilizers resulted in earthen composites with higher compressive strength and lower water permeability. These results demonstrate the feasibility of using natural stabilizers to improve the performance of earth-based materials for 3D printing without affecting their printability capacities. - 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