The above test can be carried out by our on-site testing team who all have a scientific background. Written notes are taken throughout with locations, and descriptions being clearly marked with strict reference to all relevant British or European Standards. If litigation is then considered at a later date the testing procedure will stand the scrutiny of the courts. The reasons for the failures can be confirmed by laboratory analysis for mix proportions, aggregate grading and critical void measurements if subsequently required.
As can be seen by the photograph on this failed floor screed the indent measures 11+ mm way outside the acceptable limits given in Table 4 of BS8204-1:2003 + A1:2009.
Due to the extent of the failure in this particular investigation a core was then cut out of the screed for further laboratory analysis, the picture highlights the lack of compaction towards the surface of the screed compared to the base.