Foam Grout Bands

Form for pouring or pumping grout around connector rings in pressurized pipe


Chemistry at work:

MarMac Grout Bands provide a functional barrier between the harsh and sometimes corrosive environment for the pipe joint steel. Under most conditions, Portland cement is alkaline (pH of about 12.5). Due to the presence of calcium hydroxide, a passivating iron-oxide film forms on the joint steel resulting in almost complete corrosion inhibition.

  • Protects against leaching that leads to reduction of pH in the cement grout surrounding the joint steel.
  • Resists intrusion of salts, chlorides, acids and sulfates that can affect the inhibitive properties of the grout.
  • Isolates the protective grout from aggressive soils that correlates with high corrosive electrical current.