Cementitious artificial aggregate particles for high-skid resistance pavements
DE LARRARD, François
MARTINEZ CASTILLO, Rafael
POIRIER, Jean Eric
- Publisher: TAYLOR AND FRANCIS
BETON HAUTES PERFORMANCES | MODELE MATHEMATIQUE | AGREGAT | PROPRIETE MECANIQUE | POLISSAGE | ADHERENCE | ADHERENCE (PNEU ROUTE) | BETON A HAUTES PERFORMANCES
For some critical road sections, a high skid resistance of wearing course is required to minimise the risk of traffic accidents. Nowadays this skid resistance is mainly brought by the use of special aggregates as calcined bauxite, a scarce and expensive material. The paper presents a patented technology, where a special high-performance mortar is produced and crushed at early age. These cementitious artificial aggregates (CAA) can display aggregate properties close to those of calcined bauxite. Various models are presented for the prediction of the aggregate resistance to wear, fragmentation, and polishing, making possible the optimisation of CAA for specific applications.