Report 231 Road trials of high modulus base for heavily trafficked roads

Publication Year

1997

Document Status

Current

Abstract

Road trials have been carried out on High Modulus Base (HMB), a high stiffness roadbase macadam manufactured to the standard UK composition for dense bitumen macadam (DBM), using a penetration grade binder of less than 50. The terminology used for 15 pen HMB is HMB15, for 25 pen, HMB25, and for 35 pen, HMB35. Throughout this investigation HMB15 was compared with a control macadam that was made with a nominal 50 or 100 penetration grade binder. The properties of HMB25 and HMB35 were predicted by interpolation. The overall objective was to compete HMB15 with control lengths of conventional DBM and heavy duty macadam (HDM) roadbase.

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