Research On The Content Effects On The High Temperature Performance And Application Of The TLA Mixed Asphalt

The steel deck asphalt pavement is a difficult engineering problem and research focus athome and abroad. It is one of the key technologies of bridge construction, and has beensubject to a high degree of attention and concern at home and abroad deck pavement experts.At the present stage, the pavement program of domestic and abroad steel bridge deck aremain double-SMA type, Guss asphalt type, Mastic Asphalt t Mixes type, MEpoxy asphalttype,especially the Mastic Asphalt pavement type has higher waterproof, low temperaturecracking resistance, fatigue resistance, and economic aspects are superior to other types ofbridge asphalt pavement. But at the same mastic asphalt mixes there is a very obvious flaws,namely lack of high-temperature stability, prone to rutting and other early disease. BecauseTLA mixed asphalt provides40percent of its resistance to high temperature ruttingdeformation properties for the, and thus for the in-depth analysis and rational design ofmastic mixture, on the need for mastic mixture composed of materials, particularly hightemperature rheological properties of TLA conduct a comprehensive study, the paper relieson design research projects in Hong Kong-Zhuhai-Macao Bridge Deck asphalt pavementmixture prepared from high-temperature mechanical properties of the constituent materialsand other TLA mixed Asphalt aspects of its systematic study and analyze the impact ofchanges to the high temperature stability of mastic asphalt mix, which has importanttheoretical significance for mastic asphalt mixes deck pavement engineering applications.The main contents are as follows:1．In the further study of traditional TLA mixed asphalt preparation and evaluation basis,according to the scale of the Hong Kong Zhuhai Macao Bridge15.6Km steel bridge deckpavement engineering, engineering application of TLA mixed asphalt in Hongkong have beensuccessful, with consideration of the characteristics of the climate and environment areabridge site traffic load and high temperature and rainy, preparation of TLA mixed asphalt withTLA:70#asphalt=70:30system, analyzing the relationship between TLA mixed asphaltperformance indexes and TLA content and asphalt grade.2．In view of the high temperature stability of MA in Jiangyin bridge engineeringapplication problem, high temperature performance analysis of the admixture of70%TLAmixed asphalt from the microcosmic aspect, and based on the DMA method on the TLA mixasphalt high temperature performance of SHRP complex modulus, complex modulus ruttingfactor, and the relationship with the phase angle and frequency, temperature and content of theTLA; Based on the steady rheological test to study the variation of the zero shear viscosity indexes of theTLA mix asphalt.3．The time temperature equivalence principle of TLA mixed asphalt different content,different dosage of TLA mixture in the shift factor under different ways of loading werecalculated and analyzed; and the shear modulus CAM principal curve equation based on HighTemperature Rheological master curve of TLA mixed asphalt were analyzed, discussed therelationship between the high temperature rheological parameters and mixture content.4．Based on the repeated creep recovery tests of the different temperature,differentstress, deformation characteristics and influence factors of high temperature analysis of70%TLA mixed asphalt, and based on the rheological model to analyze the variation ofrheological parameters of high temperature deformation. Analysis of the TLA mix asphalt andSBS modified asphalt high temperature deformation characteristics, and the application of thesame mixture gradation, high temperature rutting test comparison between TLA mixed asphaltand polymer SBS modified asphalt’s high temperature deformation performance.5．Based on the application of the TLA mixed asphal in the bridge deck pavement, themixture’s high temperature stability is analyzed, Studied the high temperature stability of theTLA mixed asphalt’s effect on the MA mixtures, the high temperature stability of the outdooraccelerated loading test verified, and analyze the correlation between the dynamic stabilityand accelerated loading test rut deformation, hardness penetration, incremental penetrationand impact toughness.Comparing practical engineering applying effects with the Mastic Asphalt mixture using70%TLA mixed asphalt. These includes indoor experiment and test road pavement, andanalysis the rutting fator before and after aging asphalt; through the study on the evaluationmethod of high-temperature performance of Mastic Asphalt mixture, this research chooses thesuitable high temperature performance evaluation methods and indicators of Mastic Asphaltmixture and analyzes the connection degree of high temperature performance influentialfactors within gray relational analysis method.This paper researches the high high temperature the rheological properties of differentcontent TLA mixed asphalt, and appraises modified high temperature effect based on anexperimental basis and mixture preparation test, and providescriteria for practical applicationcriteria for practical application.