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Concrete Testing & Analysis

We're proud to offer our clients a comprehensive range of services through Holliday Concrete Testing Ltd, established in 1964 and now a wholly owned subsidiary of 4RS.

With a distinguished heritage of working on projects for principal and sub-contractors, developers, engineers, property managers and local authorities, Holliday Concrete Testing gives all our clients access to peerless expertise and experience in this specialised field.  

They offer a wide range of on- and off-site concrete and mortar tests, both destructive and non-destructive, some of which are detailed here.

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  • Covermeter Surveys (BS 1881: Part 204)
    Typically used in older structures to locate steel reinforcement in hardened concrete.
  • Presence of High Alumina Cement (HAC) (BRE IS15/74)
    A test vital for the process of providing guidance and additional testing for structures containing HAC concrete.
  • Building Surveys (Intrusive & Non-Intrusive)
    Surveys are undertaken in older structures to assess potential defects to enable the client to plan possible repairs and assess the future working life of a structure.
  • Depth of Carbonation, Chlorine & Sulphate Content
    Techniques used to assess the alkalinity of the concrete environment surrounding reinforced steel to assess risk of corrosion and degradation.
  • Compressive Strength of Concrete Cubes (BS EN 12390)
    The cube test is the most widely used method of assessing the quality of hardened concrete.
  • Compressive Strength of Bricks (BS 3921)
    Testing can be carried out on both new and old bricks to ascertain compressive strength.
  • Cube-Making: Concrete & Mortar (BS EN 12350 & BS 4551)
    On-site monitoring of the quality of concrete and mortar during construction utilising widely accepted methodology.
  • Aggregate/Cement Ratio (Cement Content) (BS 1881: Part 124)
    Determining the cement content assists engineers in assessing the durability of concrete when compressive strength results are low.
  • Mix Proportions of Mortar
    This methodology is used to assess compliance of hardened mortar.
  • Compression Test on Concrete Cores (BS 1881: Part 120 or BS EN 12504-1)
    This methodology is used to assess actual in-situ strength of concrete in cases of non-compliance or in old structures.
  • Rebound (Schmidt) Hammer Surveys (BS EN 12504)
    A popular technique to assess the surface hardness of an existing structure, giving an estimated in-situ cube strength.