Concrete acid

- a special grade of concrete, resistant t o acids. This material is obtained by melting at a temperature of 130-140 ° C with sulfur aggregates acting binder (12-22%) may a lso contain plasticizers (5%) [1]. May be obtained from industria l wastes containing sulfur [2]. Binding of sulfur concrete is cooled quickly after the mixture as a result - coagulation of sulfur [1] [2] and ends after about 24 h [3]. It is a physical process, in contrast to ordinary concrete bond, which is virtually irreversible chemical transformation [1] [3].