More than 90% of Australia’s sewers are lined with OPC concrete, which deteriorates when it comes into contact with harsh acidic environments. The repair of these assets is an ongoing challenge for owners and government authorities as the existing network is suffering widespread attack. This is because regular OPC liners cannot suppress the metabolism of acid-generating bacteria which causes the decay. One thing can; Calcium.
Refined over a five-year period, ZeoCem is our new Calcium (Sodium) Aluminosilicate binder system, which incorporates Calcium into its matrix, subduing the development of sewer-dwelling bacteria. Being Aluminosilicate based, as opposed to Calcium Aluminate based, the ZeoCem binder does not undergo conversion, unlike regularly available high alumina HAC or CAC base products. Read the Technical Note.
Further durability benefits of ZeoCem include inherently high, calcium derived, alkalinity which ensures the formation of a passive protective iron oxide layer on the surface of embedded steel. This protective layer acts to inhibit the corrosion of the steel fixings it encapsulates.
This means that it maintains its structural strength over time and can be used as a protective coating. This innovation has now undergone long term testing (+700 days) and is proven to increase the design life of cementitious products in acidic environments from 10-15 years to 40-50 years.
The ZeoCem technology has now been extensively tested in a series of aggressive environments and can be adapted to a range of cementitious products in tunnelling, industrial and wastewater environments.
The products linked below currently include the ZeoCem binder.