The Study On Evaluation Target System Of Asphalt Pavement Core

At present indexes such as compactness, deflection, smoothness are mainly used to evaluate asphalt concrete pavement combining traffic data. The detect method also gradually transits from the manual detection to draws support from the lossless detection using high-tech mean. But at present the lossless detection technology are still not very mature, and there some question in the transformation from its results to the existence indexes. Moreover the detection function of one kind of equipment is unitary, and we can't know the real condition in the structure. Comparing to it, drilling hole and taking the core is a simple, direct-viewing and effective evaluation method. By carrying a series of evaluation to the core, the construal performance of the whole pavement is evaluated at the cost of less disrepair.Because there are many factors influence the asphalt concrete performance, the evaluation system of the core must consider various aspects performance of asphalt and bituminous mixture. The target boundary determination needs to accumulate much data. The evaluation system is to proposed, and conducts some targets are primarily researched. In the future, the testing methods are gradually improved and much data are accumulated, thus the indexes scopes are limited and the true evaluation is realized.The gradation composition evaluation method and mechanics index evaluation method in the system has been primarily studied. Using three evaluation parameters CA, Fac and the Faf concepts in Behre's method, the calculation formula of CA value of AC13 gradation is revised. According to the gradation composition in the standard main text and the article showed recommends, the reasonable scopes of the good gradation three parameters have been got by induction deduction the method. About mechanics target, the circular cylinder sample evaluation method at home and abroad has been used for reference. In view of the characteristics such as the cores altitude, diameter are not the same, the outer wall surface are not smoothly, and more layer structure, modulus of compression resistant resilience, single axle penetration experiment and the level the shearing testing method has been conducted to research the...