INSTALLATION FOR ASSESSMENT OF FATIGUE asphalt concrete under cyclic dynamic effect

摘要

The invention relates to the field of road construction, namely for equipment for testing of materials, such as asphalt concrete, the fatigue under cyclic dynamic loads and can be used in the road sector, construction of airfields construction industry. The problem is solved in that the apparatus for evaluation of asphalt concrete fatigue during cyclic dynamic loads, comprising a frame, a lifting table arranged to change the height, the reference beam positioning unit, the reference beam loading unit operable to cyclic dynamic loads and to apply a measuring displacement and biasing force, comprising a connecting rod-slider mechanism, the reference beam positioning assembly comprises clamping jaws mounted on the ends beam-specimen parallel to the transverse axis of the frame symmetry, and intermediate elastic base, made as a container filled with the model soil, with tight contact with the facing thereto the reference beam plane, wherein the biasing assembly of the beam-specimen loading element is configured to position it in the middle of the beam -sample, moreover, biasing force measurement is performed by the force sensor in the form of beams of equal resistance, the displacement measurement performed by the strain gauge and a spring, wherein the free ends of the springs are secured to the chassis to change the height of the lifting table using a pair of helical and installation structure further provided with a number of loadings counter. The technical result achieved in the solution of the problem is expressed in increasing the reliability evaluation Strength Fatigue parameters of asphalt concrete with cyclical dynamic loads by providing a more accurate modeling of real operating conditions of asphalt pavement during a test (calculation model "underburden - asphalt"), as well as reduction of material structure. 2 yl.