The Clay Subgrade Compactness Infuences on Life-Span of Asphalt Pavement in Northeast China
The life-span of asphalt pavement is influenced by the strength of subgrade , this paper has discussed the modulus of elasticity of subgrade under different compactness . a example of clay subgrade is gived, the pavement structures and traffic data highway are established according to currently asphalt pavement design specification, the pavement bearing abilitie of different subgrade strength is calculated under different compacting conditions, and also a conclusion has been made that a relation between life-span and strength , the calculating results show that the compactness of subgrade cutting down 1% will lead to pavement reducing 0.65 years, through quantitative analysis, it can be believed that improving compaction of subgrade can obviously prolong asphalt pavement life-span.
Z. G. Liu et al., "The Clay Subgrade Compactness Infuences on Life-Span of Asphalt Pavement in Northeast China", Applied Mechanics and Materials, Vols. 90-93, pp. 1772-1775, 2011