Transformation Scheme And Test Evaluation Of White And Black Over-layer Used In National Highway G324

With the lapse of time with national economy's development, many federal highway provincial roads enters service life the later period, has had many destruction phenomena. In view of this kind of phenomenon, many scientific research workers have invented one kind effectively, the economical transformation breakage cement coagulation earthen road pavement method, is called"the black surface coating"the method.The G324 Xiamen section is connects Xiamen and the heavy industry area flood peak important channel, the traffic flow magnitude is big, the overload phenomenon is common, the pavement failure is serious. Therefore, Fujian Province sets up the G324 transformation is 09 year Fujian Province inspects with emphasis the project. The paper the road surface transforms the first phase take the G324 small full range to Ma Xiangduan as to depend on the project, through the earlier period to the old coagulation soil surfaced road's examination, to the intermediate stage counter stress absorption level, the asphalt concrete surface coating's design, the later period constructed, and has made a half year monitor, had determined the reasonable design proposal, has facilitated the later period large-scale transformation construction.Has used the massive advanced instrumentation, including the ARRB path synthesis examination vehicle, the drop hammer type deflection meter, the cross-wind force coefficient vehicle to the surface coating coMPactness, smoothness, the wheel rut, the deflection, the structure depth has carried on the omni-directional examination, and the matters needing attention has carried on the detailed elaboration to the construction and the approval. The paper last part carried on 3 Uygur using the CT technology to the core type three-dimensional to scan, has analyzed the core type fit and unfit quality from the microscopic angle.The present stage asphalt surface coating spreads the place which the method also has many needs to study, including against reflection crack reduction measure, the stress absorption level's stress absorption effect, how the concretes kneading board hits the crack to press is steady not to have the aspect which to the original basic unit the influence, the mix basic unit's effective modulus's correct determination and so on research also has many needs to penetrate, hoped that through present paper's exploration and the research, provides the reference for the actual project.