Specialist Grouting

In addition to grouting work undertaken as part of mine workings stabilisation and mine infilling work (see separate sections for these activities) we provide a range of specialist grouting services. Examples include:

• Compensation grouting, for example treatment of solution workings in chalk or limestone with sand/cement/pfa/bentonite grout mixes
  
• Consolidation grouting of loose fills or granular strata for ground improvement or underpinning existing structures using sand based grout mixes
  
• Encapsulation grouting of inaccessible hot spots of contamination such as gas holder bases using special cementitious and resin grouts
  
• Groundwater or gas barriers using resin grouts or special cementitious grouts
  
• Fissure grouting of fault zones and other anomalies
  
• Annulus filling, for example bentonite/cement grouting of large diameter pipelines installed in tunnel or pipejack for the oil & gas industry
  
• Underwater grouting for bridge abutments and foundations using specialist anti wash-out and waterproof grouts
  
• Anchor grouting—cintec anchors, soil nails, rock bolts and ground anchors
  
• Sewer, culvert and redundant utility pipeline grouting
  
• Bridge, underpass, subway and cellar filling using pfa and foamed grouts
  
• Packer installation and deep borehole grouting
  
• Tunnel grouting for example to fill behind linings in brick lined rail tunnels
  
• Slab jacking
  

We operate a wide range of grout mixing, pumping and ancillary plant for this type of work, much of which is bespoke plant designed and developed in-house;

• Grout mixing plant including paddle mixers, pug mill mixers, colloidal mixers, capacity 0.5—150m3 per hour
  
• Grout pumping equipment includes trailer mounted concrete pumps, gardner-denver piston type grout pumps, displacement air pumps, worm pumps and mono pumps, pump outputs up to 80m3 per hr
  
• Mobile agitators and re-mixers up to 10m3 capacity
  
• Fully automated, self contained 30m3 per hr grout mixing unit ‘Groutmaster’ with full environmental control, silo materials storage, enclosed mixer & agitator, colloidal mixer unit, grout pumps and silenced power pack
  
• Vertical and horizontal silos
  
• Pressure gauging and electro-magnetic flow monitoring equipment.