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Enhancement of Ferrocement Properties Using Steel Fibre Additions to Mortar
Published in R. N. Swamy, Fibre Reinforced Cement and Concrete, 1992
Ferrocement is typically a steel reinforced cement mortar composite used in thin plate and shell applications, and which is characterised by its ability to provide corrosion resistance to the substrate steel, even though thin covers are employed, while maintaining levels of stress in the steel substantially higher than can be used in reinforced concrete.
Rehabilitation of RC short columns using ferrocement jacketing
Published in Sheela Evangeline, M.R. Rajkumar, Saritha G. Parambath, Recent Advances in Materials, Mechanics and Management, 2019
Reinforced Concrete is one of the most widely used building materials not only in the developed world, but also in the remotest parts of the developing world. Fresh concrete can be moulded into almost any shape, giving it an inherent advantage over other materials. But total collapse of RC building may occur due to change of service load and lack of column strength caused by deterioration. Seismic protection of buildings is a need-based concept aimed to improve the performance of any structure under future earthquakes. Most of the rehabilitation works consist of repairing old deteriorating structures, and structures damaged by earthquakes and natural disasters. Hence the development of a reliable and cost effective method to repair and strengthen the existing columns is a necessity in the structural engineering field. Strengthening can be accomplished by the addition of new structural elements, strengthening of existing structural elements and/or the addition of base isolators. Strengthening methods usually adopted to rehabilitate RC structures include grouting process, guniting process, application of epoxy resins, post tensioning and section enlargement or jacketing. Out of this, jacketing is one of the most frequently and popularly used techniques to strengthen reinforced concrete (RC) columns. With this method, axial strength, bending strength and stiffness of the original column is increased. Various materials can be used for jacketing such as steel, concrete, fibre reinforced polymer and ferrocement. Ferrocement is a form of thin wall reinforced concrete using wire mesh and mortar and is found to be an attractive technique due to its properties such as good tensile strength, lightweight, overall economy, water tightness, easy application and durability.
Parametric investigation on the post-fire flexural behaviour of novel ferrocement panels with geopolymer mortar
Published in European Journal of Environmental and Civil Engineering, 2023
Therefore, the use of fire protection materials to enhance temperature enduring capacity of structural members is important and necessary. Many types of fire protection materials have been developed to protect structural members. The main classes of materials used for fire protection are cementitious, intumescent, fibrous and composite materials. Ferrocement is one of the cementitious composite materials, which is formed using hydraulic cement mortar reinforced with close spaced layers of continuous and relatively small sized wire mesh. Depending on the type of mesh used in the ferrocement, the strength gets variedly influenced. Of the meshes tested, welded wire mesh proves to provide the largest increase in strength. Portland cement is the primary cementitious material that is used in the construction industry worldwide. But the Portland cement mortar and conventional concrete are not resilient enough to withstand fire and easily undergo degradation on exposure to elevated temperatures (Gu et al., 2022). The cement industry accounts for 5–8% of worldwide CO2 emissions and cement industry is the largest producer of the greenhouse gases. It is estimated that manufacture of 1 ton Portland cement involves emission of 1 ton CO2 to the atmosphere (Davidovits, 1991). For the above reasons, recent research works are focusing on the feasibility of replacing cement with different types of waste products. Fly ash has gained prominence as the most commonly used waste material for partially replacing cement (Cao et al., 2017).
U-shaped ferrocement wrapping with inter-surface locking for flexural strengthening of RC beam
Published in Australian Journal of Structural Engineering, 2020
G. M. Sadiqul Islam, Md. Naimul Haque, Md. Rabiul Alam, Safwatul Haque Niloy, Md. Mamun Islam
Various strengthening techniques have already been developed by the researchers to strengthen RC beams by means of attaching steel plate (Swamy, Jones, and Bloxham 1987; Hamoush and Ahmad 1990), placing external unbonded reinforcement (Cairns and Rafeeqi 1997, 2002), FRP composites (Triantafillou and Plevris 1992; Garden and Hollaway 1998; Grace et al. 1999), external post tensioned steel bars (Harajli 1993) and CFRP laminates (Barros and Fortes 2005; Morsy and Mahmoud 2013; Mamun 2017), etc. Along with these materials and methods, ferrocement has also drawn attention of researchers for strengthening flexural capacity deficient RC beams (Khan, Rafeeqi, and Ayub 2013; Qeshta, Shafig, and Jummat 2015). Compared to other materials and methods, ferrocement has a number of advantages such as low cost, easily available, effective, simplicity in construction and good crack arrester, which makes it a suitable strengthening material for the rural/remote area of the developing country where other sophisticated methods are still complicated to apply.