| The last few years our country import great quantities natural shale asphalt ,like TLA, Gilsonite and BMA etc., Be applied to heavy load and badness weather roads segment that the condition Kes, such as transportation and bad weather...etc. engraves to use by raising its road function and obtained good effect.And the our country have already explored clear have an abundant natural asphalt of resources, it some properties and foreign natural asphalt are equal or better, and the price is also more special and have its special advantage and have good economic efficiency and social efficiency and apply foreground very vast.The ego country ushers in a rock asphalt technique, mainly aim at North America rock asphalt UINTAITE, Indonesian cloth Dun asphalt(BMA) technical digest and absorption to develop application and research.After Xinjiang discovered that the abundant natural rock asphalt mineral hides in 2001, and some think factories aimed at the technique function of domestic and natural rock asphalt and evaluated an index sign, mixture to anticipate road to develop more extensive research with characteristic and application since green Chuan in Sichuan discovers the Dragon gate mountain asphalt mineral.Though there has been the natural rock asphalt that some engineerings use different habitat, the domestic still lacks overall evaluation and understanding to the natural rock asphalt currently.Studies rock asphalt as to change sex the function for using for system, this research mainly from changed sex asphalt material making, mixture anticipated road to use function 2 commenced, explicit usage the rock asphalt changed 70# asphalts of sexes behind of technique index sign and related road is used function, solved a rock asphalt to carry on an asphalt to change a series of technique problem in sex usage process and laid foundation for the application of rocked asphalt.(1)The Chan that studied rock asphalt and different brand 70# asphaltses goes together with a comparison and processes a method and to in response to index signTo different radicle quality asphalt, what the same and natural asphalt produces changes sex effect is have a dissimilarity, at normal regulations three greatest index sign existence more obvious difference.But widespreadly reflect a natural asphalt to go into a degree to lower, postpone a degree to lower to the radicle quality asphalt needle, the density increases Gao and soften some phenomenon of exaltation and explain that the green Chuan natural asphalt has an exaltation asphalt in changing sex effect, the gel turns the effect of degree(outstanding performance is needle go into degree the increment of the index number).In the process of concretely using in, should aim at a different radicle quality asphalt to carry on a content of excellent turn a constitution.Change sex craft in the natural asphalt in, the biggest factor of influence asphalt property is to shear to slice process, it shears the length of slicing time, shearing the constitution dissimilarity of slicing the temperature will bring a property up of a little bit greatly influence;But develop process to influence opposite weaker.The variance analyzes enunciation, the craft conditions of two processes are all nonexistent the influence effect for showing Zhao.If want to make to glue the biggest natural asphalt in one degree to change sex asphalt, the best craft condition probably is-develop temperature:180℃, develop time:90 mins, shear to slice temperature:170℃, shear to slice time:20 mins.Synthesize an engineering's technique request for asphalt, and change the on trial effect, function index sign of sex asphalt, the Chan of green Chuan rock asphalt adds quantity should not more than 7.5%.Under this comparison formatively change sex asphalt even good, there is good stability.Combine asphalt gum, the knot anticipates of function ratings, the Chan adds the function grade of changing of below 5% rock asphalt sex asphalt as PG76(82)-16(22), be applicable to the weather cent area of Shandong.(2)Studied the different rock asphalt Chan adds the relation that quantity and asphalt mixture anticipate functionThe rock asphalt changes sex asphalt mixture to anticipate to have an outstanding heat stability, 5% rock asphalts changing sex asphalt mixture to anticipate to move a stability is the radicle quality asphalt mixture to anticipate to move 1.6 times that of stability, with other a little bit also displaying of rock asphalt changing sexes change sex asphalt mixture to anticipate a good heat stability.Multiple Rus that the asphalt mixture anticipates change function experiment result enunciation the rock asphalt is changed the exaltation mixture that sex asphalt can show Zhao to anticipate the heat resists a dynamic state lotus to carry a function under the condition, the bottom permanently transforms of ability, and rock asphalt Chan after measuring more than 7.5%, change sex effect growth slowness.Adopt low temperature to split crack experiment anticipates to the mixture of the low temperature function carries on a research, result expresses that the rock asphalt changed sex asphalt to increase the brittleness that the asphalt mixture anticipates and easily frailty crack happened under the sistuation that the low temperature adds to carry, the rock changed the frailty that the asphalt mixture anticipates to turn some temperature at-20℃neighborhoods, but a few other frailties of asphalts turning some temperature and wanting all is lower than that temperature, the elucidation rock changes the low temperature function that the asphalt mixture anticipates worse, in 0℃~-20℃radicle quality asphalt, 5% rocks change asphalt, 7.5% rocks to change the breakage contingency that the asphalt mixture anticipates value iner order to approach, but 10% rocks change the breakage contingency that the asphalt mixture anticipates to want to obviously let up, the elucidation rock asphalt Chan has great capacity the low temperature function that anticipates at 7.5% mixtures sharply become bad, consequently its Chan quantity not easy more than 7.5%.Melt to split crack to experiment through a jelly, rock asphalt's changing sex asphalt can clearly raise an asphalt mixture to anticipate anti- water damage function, along with rock asphalt Chan quantity of increment, mix to anticipate of anti- water injure the ability is gradual to strengthen and be a rock asphalt, the Chan measures to 7.5% or so, mixed to anticipate TSR to appear a Feng value, along with rock asphalt Chan quantity of continue to increase, TSR is worth to then lower gradually and explain anti- water damage ability also slowly weakens and suggest the rock asphalt amount of Chan should not more than 7.5%.The asphalt mixture anticipates a jelly the anti- after melting pull strength result enunciation, along with rock asphalt the Chan measure of increment, the mixture anticipates of the anti- pulled strength to get to build up.The different radicle quality asphalt rock asphalt changes the jelly of sex asphalt to melt to split crack result enunciation, radicle quality asphalt to change sex behind mix to anticipate experiment slightly have influence as a result, win sea oil to change sex function better, and all want to surpass SBS to change sex asphalt. |
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