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*SAM 'C' Concentrate
Bitumen and SBS Polymer Concentrate
The value of combining rubber with bitumen has been recognised since its first recorded use in Europe in the 1930's. The difficulty has always been to conveniently combine the two materials in a controlled manner under "field practice". The research personnel of our manufacturing company overcame this problem in 1979 with the development of SAM 'C'.
SAM 'C' is a predigested blend of synthetic rubber and bitumen in a concentrated form which is manufactured under closely controlled plant conditions to provide uniformity of specification. Because SAM 'C' is predigested in the plant, it readily combines with bitumen to permanently modify and give predetermined properties including elastic recovery to the rubberised bitumen.
Use of SAM 'C'
By combining SAM 'C' with Class 170 Bitumen (nominally 80-100 Pen grade) in various ratios from 1:1 through to 20:1, a rubberised bitumen of the required properties can be readily produced in "the field" to meet virtually all road requirements.
The rubberised bitumen will be used either as a S.A.M. (Stress Absorbing Membrane) that is, a single or double coat seal with elastic recovery.
Alternatively, it can be used as a S.A.M.I. (Stress Absorbing Membrane Interlayer). Here the highly rubberised bitumen, normally 2:1 concentration or greater, is sprayed over a cracked bituminous or Portland cement concrete pavement, then overlaid with bituminous or asphaltic concrete. The membrane thus becomes an "intertayer".
More information
For more information about SAM C contact SAMI Bitumen Technologies.