The High-grade Road Lime-flyash-macadam Reflection Crack Reason And Prevention

This article combines in domestic and foreign lime-flyash-macadam mixture basic unit performance research, in view of the project actual situation, has conducted the massive research to lime-flyash-macadam mixture. And it selects the request from the raw material performance, crushed stones gradation, the blend composition proportion, the intensity forms mechanism, outside mixture the medicinal preparation influence to the crack aspect and so on, has conducted the comprehensive research to lime-flyash-macadam basic unit mechanics performance and to the reflection crack influence, proposed gradation design method about inlaid crowds the skeleton dense texture blend composition structure .Discovered in the lime-flyash-macadam mixture function research that, foresees accurately respective proportion change along with stones gradation and the mixture, lime-flyash-macadam mixture intensity, the anti-crack, anti-wash-out ability also obviously change. After outside mixture adding the medicinal preparation, lime-flyash-macadam early strength obtains the enhancement, the contraction crack obviously reduces.Has carried on the discussion to lime-flyash-macadam mixture basic unit construction quality and the examination, proposed in order to reduce two ashes stone packing reflection crack, in the construction adopts corresponding measure.Consideration surface layer thickness mainly with volume of traffic related, the basic unit, roadbed thickness is mainly related with subsoil intensity, draws up the surface layer thickness and basic unit thickness, proposed in view of the Shanghai urban road bituminous pavement modular design; And has carried on the analysis to lime-flyash-macadam bituminous pavement reasonable thickness, has analyzed the bituminous pavement thickness to lime-flyash-macadam bituminous pavement reflection crack influence .