Experimental Study Based On Alternate Mix On Mixing Auger Of Material Transfer Vehicle For Asphalt Mixture

Data indicates that it can bring both great social efficiency and economic efficiency by using MTV (material transfer vehicle) in the construction highway asphalt pavement by the authority. So it is urgent for modern engineering machine to perform the research on MTV and guide the research direction of the design for MTV made in china.Through analyzing the rolling mechanism and dynamics of the materials as well as the mixing mechanism and kinematics in the process of mixing, the influences of the auger in the mixing auger on the segregation of asphalt concrete are found. An experiment model is developed based on these analyses, and the rate of similarity is given to be 1/2. The rate has little influence on experiment results in terms of the similarity and modeling theories. By doing orthogonal experiment, comparing the results, the correlation of the rate of mixtures segregation ξ and the rotary speed n of the axes, the pitch S and the radius r of the auger are drawn. At last, we can conclude the designing principle of the mixing auger of MTV is:① big diameter and small pitch which is varied uniformly;② the rotary speed n should be controlled within 60~80r/min;③ the width of scrape of the scrape conveyor should be around 0.70m.By this rules the effect that asphalt mixture segregation is eliminated by MTV is obvious.In this paper, in view of the main problems about experiment organism existing in the process of the experiment operation, the author put forward the rheological models about hot asphalt mix and lubricating oil mix were found according to rheological theories. Furthermore, the alternate mix for Dong Hai AH-70 heavy-duty asphalt AC-20I mix at temperature of 13℃ was obtained and developed as the following:T602 Polymethacrylates + L-CKC220 lubricating oil + AC-20I aggregate (the proportion of weight is "1:100:1800").