We can carry out testing to NZ and/or International Standards. Our tests include quality control testing, random verification testing (RVT), site sampling and testing and specialist advisory services.

Pavement Investigations

Pavement quality depth and variability

  • Geotechnical descriptions of material
  • In-situ density
  • Pavement test pits
  • Photographing and logging of pits
  • Sampling of layers
  • Scala in subgrade


Quality of pavement materials

  • Benkelman beam
  • British pendulum
  • CBR
  • Clay index
  • Gradings
  • Plasticity index


If stabilising, which additive to use?

  • Pavement treatment selection with various additives at various % - lime, cement, combination
  • CBR
  • UCS
  • ITS
  • Mix design (T/19)
  • Mix verification


Concrete Testing

Routine tests for concrete, cement grouts and concrete products are as shown below:

Determination of hardened concrete properties

  • Splitting tensile strength
  • Flexural tensile strength
  • Compressive strength of moulded cylinders
  • Compressive strength of drilled cores
  • Capping of cylinders
  • Density of hardened concrete
  • Drying shrinkage and wetting expansion
  • Thermal expansion
  • Density, absorption and voids in hardened concrete


Determination of fresh concrete properties

  • Sampling
  • Moulding and curing
  • Density (unit mass)
  • Slump
  • Bleeding of concrete
  • Air Content (air meter)
  • Spread
  • Grout flow time
  • Volume change and bleeding of grout
  • Concrete and clay paver testing
  • Cement testing
  • Specialist concrete testing
  • Product development
  • Steel detection
  • Schmidt hammer impact
  • Concrete coring