SightGRIP - the first laboratory determined colour coated High Friction Aggregate numerically assessed by the British Board Agrément (BBA) for resistance to colour change. Engineers may therefore specify by independent test data essential for coloured high friction surfaces.

BBA TEST PROGRAMME (Product Assessment Report 1378) - Resistance to wear, scuffing, diesel, freeze/thaw, salt spray, skidding, UV.

click here to download a PDF of summary test results. This download is a PDF document which requires Adobe Acrobat. Click here to download Adobe Acrobat and follow steps 1, 2 & 3.

The above mentioned test procedures were developed by the TRL (Transport Research Laboratory) for the HAPAS (Highways Authorities Product Approval Scheme) high friction surfacing systems and their suitability to be used on trunk roads. Using the same test equipment and UVA weathering tests at the BBA, non-subjective assessments were made for the resistance to colour change.

COLOUR MEASUREMENT Spectrophotometer colour measurements were taken before and after each test. By using colour co-ordinates to express the overall colour change in terms of - the greater the value the bigger the colour change. The non-subjective numerical values were evaluated using *CIELAB 1976 method where both intensity and colour change can be measured. CIELAB colour space reproduced by kind permission of X-Rite inc/Analogue Digital Services Ltd.

The BBA also compared the relative performance of Red SightGRIP with other materials on the market at the time of testing.

PRODUCT A
An alternative non SightGRIP high skid resistance, Red coated calcined bauxite aggregate of unspecified origins.
SightGRIP and Product A samples for test were both laid using a proprietary Red P.U. binder.
PRODUCT B
A red thermoplastic high skid resistance system of unspecified origin.

• SightGRIP easily met the initial requirements for skid resistance (SRV65 minimum) for classification as a High Friction aggregate and kept its skid resistance higher and longer than the Thermoplastic material. (Product B)
  
  
• SightGRIP had the greater resistance to colour change after scuffing than the alternative materials tested. (Product A & B)
  
  
• SightGRIP when used with a proprietary PU binder retained more texture (sand patch method) than the alternative materials tested on the wear test, and exceeds the Type 1 requirement for High friction system assessment.
  
  
• When tested under UV -A and condensation for weathering SightGRIP was more resistant to UV-A than the Thermoplastic material tested.
  
  
• All other SightGRIP colours were tested for UV-A giving an overall guide.
  
  
• SightGRIP is effectively resistant to the action of salt spray, the non SightGRIP colour coated bauxite showed 50% more Colour change in the same test.
  
  
• SightGRIP was relatively unaffected by the diesel and freeze /thaw conditioning tests.

Specify the first independently tested coloured High Friction Aggregate

Copies of the BBA assessment report No 1378 can be supplied on request or click here for our Power Point Presentation.