Synopsis
Basalt reinforcement is a relatively new type of reinforcement, used as an alternative to steel. As the name implies, the bars are made of basalt, which is a naturally occurring volcanic rock. The reinforcement is tested by placing the bars in concrete beams and bending the beams in flexure. Basalt reinforcement was found to have several beneficial properties: the bars are lightweight, possess a high tensile strength and are resistant to fire. Nevertheless, basalt reinforcement has a low elastic modulus and therefore the test beams exhibited high deflections. Anchorage problems were also evident, characterised by substantial bar slippage. Here, this type of reinforcement is critically evaluated and possible applications are suggested.