Stone mastic asphalt: assessing the effect of cellulose fibre additives

& Currently, in the UK, there is considerable interest in the fact that a German bituminous surfacing mixture known as stone mastic asphalt may possess levels of in-service performance that resist the growing incidence of premature failure experienced by traditional materials such as hot rolled asphalt. A high stone content grading requires the use of a stabilizing additive to ensure long-term performance. The most common type of additive is cellulose ®bre. This paper assesses the e€ect that the addition of di€ering types of this ®bre has on measurable bituminous mix properties.