Skip to content
  • Telephone: 020 8955 9680
  • Email:

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 (UKAS Accredited Testing Body 478).  

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.

Holliday Logo


  • Compressive Strength of Concrete Cubes (BS EN 12390)*

The cube test is the most widely used method of assessing the quality of hardened concrete.

  • Cube-Making: Concrete & Mortar (BS EN 12350 / BS EN 12390 / BS 4551)*

On-site monitoring of the quality of concrete and mortar during construction.

  • Compression Test on Concrete Cores (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 12504-2)*

A popular technique to assess the surface hardness of an existing structure.

  • 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.

  • Covermeter Surveys 

Typically used in older structures to locate steel reinforcement in hardened concrete.

  • Depth of Carbonation, Chlorine & Sulphate Content

Techniques used to assess the risk of corrosion and degradation of steel reinforcement. 

  • 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.

  • Aggregate/Cement Ratio (Cement Content) (BS 1881: Part 124)

Determining the cement content assists engineers in assessing the durability of concrete.

  • Mix Proportions of Mortar (BS4551)

This methodology is used to assess compliance of hardened mortar.

  • Compressive Strength of Bricks (BS 3921)

Testing can be carried out on both new and old bricks to ascertain compressive strength.

*UKAS accredited tests. Please click here for our UKAS schedule of accreditation.