Articles in Taxonomy

Bitumen analysis by FTIR spectrometry: testing and analysis protocol – BRRC Method of Measurement ME 85/13

This publication describes a standardization protocol for the interpretation of FTIR spectra of dissolved bitumens. The objective is to determine various indicators (e.g. of ageing or the presence of polymers such as SBS or EVA) from absorbance values measured on FTIR spectra, through a semi-quantitative comparison of the intensities or surface areas of peaks within the normalization range.

BRRC Dossier

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Measurement of road surface texture – BRRC information leaflet F68

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Most modern devices for measuring texture in the macro and megatexture ranges are based on the principle of “laser triangulation”. A laser beam is projected perpendicularly onto the surface to be investigated and a special camera “observes” the patch of light on the road surface. The camera is capable of determining the height of the patch. By moving the measurement system (most often, but not necessarily, parallel to the road centre line) and measuring and recording the height of the patch at fixed intervals, it is possible to obtain a two-dimensional profile of the road surface.

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Statistical Pass-By (SPB) method – BRRC information leaflet F67

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The Statistical Pass-By (SPB) method is a method to sample noise from traffic on a given road surface, with a view to assessing the influence of the road surface on traffic noise.

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German dynamic plate – BRRC Information leaflet F70

This device was originally developed in Germany and is used to determine the dynamic deformation modulus of embankments and base layers in road construction.

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