【摘要】：隨著高速公路的發(fā)展和使用,許多瀝青路面在運營不久后會出現(xiàn)水損害和低溫開裂等病害。目前,對瀝青混合料的性能參數(shù)評價標(biāo)準(zhǔn)普遍采用小樣本均值的試驗方法,但是由于瀝青混合料顆粒的大小、形狀的不規(guī)則以及成型過程中顆�？臻g分布的不均勻,導(dǎo)致內(nèi)部結(jié)構(gòu)的差異,從而決定了瀝青混合料性能參數(shù)的離散性。因此小樣本均值試驗與實際情況存在一定的差異,不能滿足設(shè)計要求。本文通過大樣本試驗數(shù)據(jù),對瀝青混合料性能參數(shù)分布規(guī)律進(jìn)行研究,建立符合分布規(guī)律的風(fēng)險模型,基于風(fēng)險理論探索性能參數(shù)質(zhì)量控制標(biāo)準(zhǔn)的方法,并確定了瀝青混合料性能慘檢驗評定方法。本文基于大樣本試驗結(jié)果,分析瀝青混合料性能參數(shù)變異性產(chǎn)生的原因,確定了變異性存在的必然性。因為不同級配對瀝青混合料性能參數(shù)產(chǎn)生一定的影響,因此,本文選取基于AC-16瀝青混合料,選取三種級配、兩種瀝青拌制瀝青混合料進(jìn)行水穩(wěn)定性和低溫抗裂性的試驗,確定了其性能參數(shù)的分布規(guī)律。結(jié)果表明,評價瀝青混合料低溫性的最大彎拉應(yīng)變和彎曲應(yīng)變能密度可以用二參數(shù)威布爾分布表征,而評價水穩(wěn)定性的凍融劈裂強(qiáng)度比可以用三參數(shù)威布爾分布表征。通過上述的研究,建立了符合其分布規(guī)律的瀝青混合料質(zhì)量控制標(biāo)準(zhǔn)的風(fēng)險模型,提出了基于風(fēng)險理論的瀝青混合料性能參數(shù)控制標(biāo)準(zhǔn)的確定方法,通過可靠度理論對基于風(fēng)險理論的瀝青混合料性能參數(shù)控制標(biāo)準(zhǔn)進(jìn)行了效益分析。最后,針對現(xiàn)行規(guī)范的不足,提出了均值fa和最小值fmin 2種檢驗方法作為瀝青混合料水溫穩(wěn)定性能參數(shù)檢驗評定方法。
[Abstract]:With the development and use of expressway, many asphalt pavement will appear water damage and low temperature cracking disease soon after operation. At present, the performance parameters of asphalt mixture are generally evaluated by the method of small sample average. However, due to the irregular size and shape of asphalt mixture particles and the uneven distribution of particles in the molding process, The difference of internal structure determines the dispersion of asphalt mixture performance parameters. Therefore, there is a certain difference between the small sample average test and the actual situation, which can not meet the design requirements. In this paper, based on the large sample test data, the distribution law of performance parameters of asphalt mixture is studied, and the risk model according to the distribution law is established. Based on the risk theory, the method of quality control standard for performance parameters is explored. The evaluation method of asphalt mixture performance was determined. Based on the test results of large sample, this paper analyzes the reasons for the variability of asphalt mixture performance parameters, and determines the inevitability of variability. Because of the influence of different gradation on the performance parameters of asphalt mixture, this paper selects the asphalt mixture based on AC-16, selects three gradation, two kinds of asphalt mix asphalt mixture to carry on the water stability and the low temperature crack resistance test. The distribution of its performance parameters is determined. The results show that the maximum flexural strain and bending strain energy density for evaluating the low temperature properties of asphalt mixtures can be characterized by two-parameter Weibull distribution, while the ratio of freeze-thaw splitting strength to evaluate water stability can be characterized by three-parameter Weibull distribution. Through the above research, the risk model of asphalt mixture quality control standard is established according to its distribution law, and the determination method of asphalt mixture performance parameter control standard based on risk theory is put forward. Based on the reliability theory, the performance parameter control standard of asphalt mixture based on risk theory is analyzed. Finally, in view of the shortcomings of current specifications, two testing methods, mean fa and minimum fmin, are put forward as the test and evaluation methods of asphalt mixture water temperature stability performance parameters.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U414

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