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How much reduction of concrete cover can be achieved by replacing ordinary steel reinforcement with basalt bars? 

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Reinforcement
Bond strength
Rod
Moment redistribution
Best insight from top research papers

Replacing ordinary steel reinforcement with basalt bars can potentially lead to a reduction in concrete cover due to the superior corrosion resistance of basalt fiber-reinforced polymer (BFRP) bars compared to steel reinforcement. Basalt bars have shown promise in terms of durability and strength, making them a viable alternative. Studies have indicated that basalt fiber-reinforced polymer (BFRP) rebars exhibit good corrosion resistance under alkaline conditions, potentially allowing for a reduction in the concrete cover of retrofitting elements. Additionally, the use of BFRP bars in concrete structures can lead to comparable bond performance to steel-reinforced concrete, further supporting the feasibility of reducing concrete cover when using basalt bars.

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Papers (5)Insight
Open access•Journal Article•DOI
Durability and Mechanical Properties of Concrete Reinforced with Basalt Fiber-Reinforced Polymer (BFRP) Bars: Towards Sustainable Infrastructure
Osama Ahmed Mohamed, Waddah Al Hawat, Mohammad S. Keshawarz 
26 Apr 2021-Polymers
14 Citations
Replacing ordinary steel reinforcement with basalt bars can achieve a reduction in concrete cover due to the superior bond of BFRP bars, enhancing sustainability and durability in infrastructure construction.
Open access•Proceedings Article•DOI
Parametric Study on Moment Redistribution of Fiber Reinforced Concrete Continuous Beams with Basalt FRP Bars
Abdulrahman Hamdi Abushanab, Wael Alnahhal 
28 Oct 2020
1 Citations
Replacing ordinary steel reinforcement with basalt FRP bars can achieve a reduction in concrete cover due to the corrosion resistance and higher strength-to-weight ratio of FRP bars.
Open access•Journal Article•DOI
Basalt reinforced concrete structures for retrofitting concrete surfaces
Benjamin Wolf, Andrea Kustermann, Christian Schuler, Christoph Dauberschmidt, Ömer Bucak 
01 Jan 2018
1 Citations
Replacing ordinary steel reinforcement with basalt bars can potentially reduce the concrete cover due to basalt's proven corrosion resistance, allowing for thinner retrofitting elements in concrete structures.
Open access•Proceedings Article•DOI
Basalt FRP rods assessment as an alternative reinforcement for reinforced concrete
Jose Vercher, Carlos Lerma, Enrique Gil, Ángeles Mas 
09 Nov 2022-Proceedings
Replacing ordinary steel reinforcement with basalt bars can potentially reduce the concrete cover due to the smaller diameter of basalt FRP rods, enhancing sustainability in reinforced concrete structures.
Open access•Journal Article•DOI
A Detailed Investigation of the Bond Performance of Basalt Fiber-Reinforced Polymer Bars in Geopolymer Concrete
S. H. Mohmmad, Mehmet Eren Gülşan, Abdulkadir Cevik 
10 Feb 2022-Periodica Polytechnica-civil Engineering
Replacing ordinary steel reinforcement with basalt bars can achieve comparable bond performance in geopolymer concrete, potentially allowing for similar reductions in concrete cover thickness while maintaining structural integrity.

Related Questions

How much is carbon reduced by using ggbs vs cement in concrete?5 answersBy using Ground Granulated Blast Furnace Slag (GGBS) as a substitute for cement in concrete, significant reductions in carbon emissions can be achieved. Studies have shown that GGBS can replace cement by up to 20%, 30% to 60%, and even up to 80% when combined with other industrial by-products like fly ash and calcium carbonate. This substitution leads to a notable decrease in CO2 emissions during cement manufacturing processes. Additionally, the use of GGBS in concrete production has been linked to improved durability properties and reduced carbon footprints, making it an environmentally friendly alternative to traditional cement. Overall, incorporating GGBS in concrete mixtures presents a promising approach to reducing carbon emissions associated with construction materials.
What is the value of the friction coefficient of the steel reinforcement with the concrete?5 answersThe friction coefficient between steel reinforcement and concrete varies based on different factors. For instance, in the case of using straight steel fibers in Steel Fiber Reinforced Concrete (SFRC), the friction coefficient plays a crucial role in bonding forces. Similarly, in the context of sawtooth steel plates on temporary RC columns, the friction coefficient significantly improves with the use of sawtooth steel, showing a linear relationship with the aspect ratio of the sawtooth. Moreover, in fiber-reinforced concrete composites, reducing the diameter of the fiber can enhance the frictional bond strength by up to 300% for steel fibers and 190% for glass fibers. Additionally, in the case of glass fiber reinforced polymer (GFRP) profiles, the friction coefficient ranges between 0.5 and 0.6, influenced by factors like concrete type and normal stress.
How the diameter of the steel bar affect the ITZ?5 answersThe diameter of the steel bar has an effect on the interfacial transition zone (ITZ) between the cement paste and the steel. The tests conducted in the study by Belaïd et al. show that the ITZ between the cement paste and galvanized steel has a higher porosity and modified pore size distribution compared to the ITZ of the cement paste-steel contact surface. However, over time, the characteristics of the ITZ change, and at 28 days, the porous structure of the ITZ around galvanized and ordinary steel is not significantly different. This change is attributed to the formation of calcium hydroxyzincate, which fills the porous structure in the ITZ and promotes hydration. Therefore, the diameter of the steel bar can influence the porosity and structure of the ITZ in reinforced concrete structures.
Does the use of recycled aggregate concrete affect the development length of reinforcing bars?4 answersThe use of recycled aggregate concrete (RAC) can affect the development length of reinforcing bars. The bond-slip response of recycled coarse aggregate concrete (RCAC) with reinforcing steel was investigated, and it was found that the bond strength of RCAC is similar to that of natural aggregate concrete (NAC). The bond performance of RAC structures reinforced with fiber-reinforced polymer (FRP) bars was also studied, and it was determined that the bond strength, bond stiffness, and slip are affected by various factors such as the contact interface, concrete type, bar dimension, and surface shape of FRP bars. Additionally, the introduction of recycled fine aggregate (RFA) from construction and demolition waste (CDW) can modify the bonding stress between steel bars and concrete, with a reduction in adhesion stress observed. Therefore, the use of recycled aggregate concrete can have an impact on the development length of reinforcing bars, depending on various factors such as the type of aggregate and the specific characteristics of the concrete and reinforcing bars.
How fibre reinforced concrete reduce cracks?5 answersFibre reinforced concrete (FRC) reduces cracks by providing additional confinement to the reinforcement, delaying or preventing the appearance of mechanically induced splitting cracks. The addition of steel fibres to the concrete matrix slows down the cracking phenomena and increases the energy absorption capacity of the structure. The use of metal fibres in concrete significantly increases crack resistance and blocks crack development, resulting in a more uniform distribution of forces in the structure. The combined application of steel fibres and external carbon fibre-reinforced polymer (CFRP) sheets enhances the flexural resistance and resolves the structural safety problem caused by corrosion of the steel bar reinforcement. The crack width in steel fibre reinforced concrete can be reduced by up to 75% in bending moments and up to 90% with imposed deformations, depending on the post-cracking strength of the concrete.
What is the mechanical properties of hybridized basalt FRP and steel wires composite bar?5 answersHybridized basalt FRP and steel wires composite bars have improved mechanical properties compared to traditional reinforcement. The use of basalt fibers in the composite bars enhances their mechanical behavior, including tensile strength, elastic modulus, and energy absorption. The modulus of elasticity and tensile strength of the hybrid composite bars increase by 83% to 120% and 6% to 26%, respectively, compared to glass-fiber-reinforced-polymer (GFRP) bars. Additionally, hybrid composite bars with basalt and steel wires exhibit higher absorbed energy compared to other types of hybrid composite bars. These findings suggest that the hybridization process improves the mechanical performance of basalt FRP and steel wires composite bars, making them a promising solution for reinforcement in aggressive environments.

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