Influence of the Aggregate Shape and Resistance to Fragmentation on Unbound Base Layer Resilient Modulus

The performance of unbound base materials, exclusively the upper layers, besides compaction level and layer thickness, depends on material type, aggregates shape, fine content mechanical properties aggregates. response pavement structure to loading is expressed through stress strain magnitudes, accumulation which leads permanent deformations. One key factors for designing layers resilient modulus, can be found from triaxial tests. aim research analyse effect aggregate particle resistance crushing modulus layers. following have been determined during tests: size distribution, shape flakiness, percentage crushed broken surfaces, density, water absorption, under low loading. According performed with tested mixtures, it assumed that most influence exerted by whole granular absorption largest surface angularity. Resilient in dolomite fraction mixtures differing 32 mm 56 showed any reasonable difference mean nominal pressures being higher than 300 kPa.