The Influence of Basalt Fibres on the Mechanical Properties of Concrete

Fibre-reinforced concrete is commonly used in both structural and non-structural applications, particularly in precast concrete members. Traditionally, the fibres are either steel or (more recently) polypropylene. The addition... [ view full abstract ]

Fibre-reinforced concrete is commonly used in both structural and non-structural applications, particularly in precast concrete members. Traditionally, the fibres are either steel or (more recently) polypropylene.
The addition of fibres to the concrete matrix has been reported to offer improved post-crack performance and to enhance the concrete’s toughness, which is important when transporting and handling smaller precast elements. The influence of fibres on mechanical properties such as compressive and tensile strength is less well established, with conflicting reports in the literature.
Alternatives to both steel and polypropylene fibres have been suggested, with recent research turning to the use of basalt fibres. This paper reports on the influence of basalt fibres on the mechanical properties of both fresh and hardened concrete. A range of fibre additions have been examined and a series of tests to determine the rheological properties of fresh concrete, along with the compressive and tensile strengths of the hardened material. The results of these tests are benchmarked against published values and against control mixes and are presented here.