Design Of Hot Mixture Asphalt Based On Mortar Character

Hot mixture asphalt is composed with mortar and aggregate, among which mortar is critical factor of voiscosity of mixture, and aggregate is grid. But the emphases of empexisting disign method is the difination of gradation, so it is necessery to develop the mixture design system based on mortar.Testing is taken on mineral fillers, and it is analyzed the mechanism and character of different test; through the evaluating of mortar, it is found that filler has great influence on performance of mortar; finally value index of filler is brought forward though the relavity analysis between filler and mortar with promoting possiblility. It is proved that the apparatus of asphalt can used to analayze the mortar through computation, then testing performance of mortar; Filler type and dose have influence on mortar viscosity, as mortar bonding aggregate in mixture, so it is improper to decide the construction temperature of mixture according to asphalt; After constracting with performance of defferent aging manner of mortar, it is found that filler affect the aging of mortar, and which can weaken aging degree. Results show that descreasing F/A, and increasing fibre amount, can improve the character of mortar.Analyzing with high temperature performance of mixture, it is proved than driving test can used for estimating the resistence capacity of aggregate, and can ensure the stability though which; The shape and key sieve pass is used to describe the aggregate charater; Hamburg test is used to estimate the performance of mixture, and it is proved using SGC info and IDT strength can predict the mixture character, also the index of gradation shape is effective, and have relation with mixture.Collecting the research finding, it is discussion of design system of hot mix asphalt based on mortar character. The design should include the raw materials filter,mortar and gradation design,asphalt mortar content determination,mixture performance inspection. Among which, it is emphasized that material quality should be controlled, and gradation confirmination should obey the approach of first draft,valuation and optimization, the finally, besides performance, the construction character should be thought much of.