The Investigation On Interface And Pavement Performance Of Glass Fiber Reinforced Bituminous Mixtures

With the development of advanced level highway, volume of traffic enhances , the axle load on rail increases , the durability of HMA(hot mix asphalt) and early damage have brought forward higher request , road surface damage of bituminous pavement has become the advanced level highway bituminous pavement having technology and mass problem commonly. 8~lacks the actual life time on one hand, now having a road commonly in designing life time in 12 years; On the other hand, enhance with the volume of traffic promptness, the vehicle overloads heavy section-rization and grave , make road surface mass be confronted with a rigorous test. Pit slot , dehiscence , early phase such as lathing a track , resisting smooth function deficiency once, damage some of Xin Jian roads opening to the outside world traffic with regard to having appeared for 2 years , individual section early phase damages a phenomenon having to gravely, carry out and bad social influence restoring , bringing about direct and indirect economic losses. Therefore, improve the bituminous pavement function, prolong road surface lifes, increasing investment returns thereby is important problem been confronted with by communications department.Technology measure application such as SMA , SBS modified bitumen , rubber powder pitch , dyadic bitulith of teeming has had certain effect to improving road surface mass , SMA has improved cost of construction making an appointment with 20% , SBS has improved cost of construction making an appointment with 40% , dyadic bitulith of teeming has improved cost of construction making an appointment with 80% , expensive cost of construction has restricted the new technique application but compared with base material asphalt.Add fibre in the asphalt strengthen material being able to give full scope to every compound material middle component sufficiently , make the bitulith road surface satisfy complicated strain state and the external world environment change requiring that main part prolonging road life time , already becoming the home and abroad bituminous pavement technology develops direction. Roads such as fiberglass and polymer fibre uses fibre to be compared with each other, that price is Tergal only 1/5, merit having cost of construction low , drawing materials going to the lavatory, whose tensile strength can reach 1400 ~ 1500 MPa, not only increasing tenacious effect well, strengthen effect is also very good. But form a regiment as brittleness and static electricity strengthening material, fiberglass being under construction to the person in the asphalt hitting the target blending process having disadvantageous effect.But our country research reinforcing bitulith in fibre probes a stage in the first step , does not find out the system being suitable to our country highway status fibre type and applying method, entrance fibre price expensive , is able to increase initial stage construction cost greatly. At present, there be no the fiberglass product being for an asphalt road's using specifically for the moment on the market, think that raw material resources hoards amounts to the fiberglass main part very big, the fiberglass of our country annual output place occupies the world second, in the homeland own a lot of childbirth producing a manufacturer, being material's and application have provided the sufficient guarantee. The technology being in progress to fiberglass handles the queen, the road developing out applying to asphalt uses the fiberglass product, and applies to the actual project, have very important practical or immediate significance and the vast application prospect. Road surface the main body of a book being studied by system, applying fiberglass to bitulith, the synthetical road raising the pavement performance.the following research result mainly:1. Specifically for the pitch and the fiberglass molecular structure characteristic, adopt to unite agent surface treatment method occasionally, the interface raising fiberglass and the pitch combines an ability, have trial-produced but have applied to the asphalt fiberglass product, make fiberglass can disperse homogeneously in the asphalt mixtures, not forming a regiment , not intertwining with each other, with and the pitch has the very good cementation.2.Adopt a tank furnace to follow productive technology , handle in the process of fiberglass wiredrawing directly process occasionally uniting agent infiltration, have carried out treatment unnecessarily again when being used to strengthen , may carry out online cutting , have facilitated a productive technology , has establish a basis for type approval and batch manufacturing next step.3. The function , test result indicate the interface between adopt Fu Li Ye to shift an infrared spectrometer having analysed fiberglass and five kinds pitches , chemistry interlinking and the wave number do not translate between testifying fiberglass and the pitch , only simple physics intertwines with each other between interlinking , fiberglass and pitch handling fiberglass in the day afer tomorrow and not having a chemistry between the pitch as a result of occasionally uniting an agent. Fiberglass and the pitch interface glue the chemistry adsorption, do not have combining with being outside, the commixture with the asphalt mixes for complete physics.4. Rutting testing,the T283 testing , small beam are curved , indirect roads such as stretching the acoustic stiffness modulus , splitting off strain uses function to test that by the fact that the rut , single axis static load creep , flerry creep , jelly melt, have analysed the best fibre adulterating the improvement effect adding fiberglass use a function to asphalt road, and having brought forward the AC13 asphalt combining with test result adulterating amounts.5. Adopt the ANSYS software to facilitate a model to fiberglass bitulith having carried out the nonlinear simulation analysis, having forward the curved creep test's.6. Apply a gray to forecast theory building G (1 , 1) .G (1, N) model, have analysed , have worked out GM (1 , 1) sum GM to testing that the data builds a model (1, N) gray forecast model procedure , the forecast having been in progress to bitumen content and fibre contents according to test result.7. The shop by testing a road has been built , has suggested that fiberglass adulterating in the asphalt adds handicraft, the bitulith having checked that fiberglass strengthens is able to satisfy actual the project design and the specification being under construction , can carry out application and dissemination.And secondary experiment research is perceived with testing that road application is not bad, the fiberglass compound material properties of products index we are trial-produced giving birth to a child is outstanding , the stability is good, the pitch has the very good cementation, disperse homogeneously in the asphalt , satisfy asphalt specification in the process giving birth to a child , being under construction , notable have improved a road using function, and price to cheap , to have the very good marketplace to extend a prospect.