Selection of basalt fiber with resistance to concrete alkaline environment
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Selection of basalt fiber with resistance to concrete alkaline environment Vitali Pastsuk1 · Madis Kiisk1 · Rünno Lõhmus1 · Maido Merisalu1 · Sergei Kovaljov2 · Alex Biland3 · Volodymyr Gulik1,4 Received: 1 June 2020 / Accepted: 13 October 2020 © Springer Nature Switzerland AG 2020
Abstract Due to a growing interest in basalt fibers as a reinforcing material for concrete, it becomes necessary to study behavior of such fibers and their interaction with the concrete matrix. Basalt fibers have prospective mechanical and processability properties, as well as good cost-effectiveness when used as concrete reinforcement. However, alkali resistance properties of basalt fiber are rather weak. Three types of basalt fibers from various manufacturers are presented, which were produced from different basalt raw materials and with distinct production technologies. All presented basalt fiber types were studied before mixing with concrete and after it has cured. Size and morphology, young’s modulus, tensile strength, bending modulus and flexural properties as well as chemical analysis tests were carried out on the types of basalt fibers under consideration. One type of basalt fibers showed better alkali resistance properties due to the special selection of raw materials for the basalt fibers production. Keywords Basalt fibers · Basalt filaments · basalt fibers production · Mechanical properties · Alkali resistance · Fiberreinforced concrete
1 Introduction Toughness, cracking capacity, ductility after cracking, flexural and impact strength, rheology and durability are some of the engineering challenges of concrete for various applications. Concrete is the main building material due to its abundance and cost compared to other materials. However, different applications require specific properties and may not be suitable for all types of applications. Adding fibers to the concrete mix can significantly improve the engineering properties of concrete, which can meet the requirements of various applications. According to previous studies [11, 18, 20, 28, 31, 40], the use of fibers also has some additional benefits such as reduced abrasive wear of concrete, which is mainly influenced by aggregate
properties, environmental conditions, water-to-cement ratio, fiber volume in the mix, use of additives, voids, cement type and concrete mix proportions. There are various types of fibers on the market for reinforcing cementitious composites, such as steel, organic, glass, asbestos and polypropylene fibers [13]. It is noticed that fiber-reinforced concrete (FRC) with high ductility, durability and corrosion resistance and high-performance fiber-reinforced concrete (HPFRC) are widely used in military, marine and civilian areas such as explosion-proof structures, offshore platforms, airport runways and highway pavements [1, 35, 36]. Among all the currently used fibers, steel fibers stand out for their high modulus of elasticity and stiffness which help to improve the flexural strength of concrete [32].
* Volodymyr Gulik, volodymyr.gulik@gmail
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