施工关键因素对环氧沥青混凝土路用性能的影响

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为了研究施工关键因素与环氧沥青混凝土路用性能的综合关系,通过模拟施工关键因素的变化,在室内进行多指标正交试验,关键因素主要包括环氧沥青中A、B组分质量比(A组分为环氧树脂,B组分为石油沥青与固化剂组成的匀质合成物)、油石比、集料级配、混凝土成型时间、混凝土成型温度与压实功,多指标主要包括高温稳定性、低温抗裂性、抗疲劳性、渗水性、抗滑性与水稳定性,利用改进灰色局势决策计算正交试验中每种局势的路用性能与最优局势的灰色综合关联度,并通过SPSS软件进行极差与方差分析。分析结果表明:局势4的灰色综合关联度为0.943 7,与局势3的灰色综合关联度相差0.081 1,较大的差值说明不同的局势与最优局势的联系紧密程度相差较大,根据各局势的灰色综合关联度得出18种制作试件方案的优劣排序;成型时间的极差为2.857,集料级配的极差为1.555,两者相差1.302,说明不同的关键因素对环氧沥青混凝土路用性能的影响程度不同,根据各关键因素的极差得出6个关键因素对环氧沥青混凝土路用性能的影响程度由大到小依次为成型时间、油石比、A、B组分质量比、压实功、成型温度与集料级配;比较每个关键因素的各水平的灰色综合关联度均值,可以得出最佳的施工方案为A、B组分质量比取1∶2.9,油石比取6.5%,集料级配取2.36mm筛孔通过率设计中值,成型时间取55min,成型温度取120℃,压实功取轮碾24次;方差分析中各关键因素的F检验值均大于临界值19,具有良好的显著性。可见,采用改进灰色局势决策可以有效评估不同施工方案下环氧沥青混凝土路用性能,并可以结合极差分析确定施工过程中各关键因素对环氧沥青混凝土路用性能的影响程度与最佳的施工方案。 In order to study the comprehensive relationship between construction critical factors and road performance of epoxy asphalt concrete, the multi-index orthogonal experiment was conducted indoor by simulating the changes of construction key factors. The key factors include the mass ratio of A and B components in epoxy asphalt A component of the epoxy resin, B component of the homogeneous composition of petroleum asphalt and curing agent), stone ratio, aggregate gradation, concrete forming time, concrete forming temperature and compaction, multi-indicators include high temperature Stability, low temperature crack resistance, fatigue resistance, water seepage, skid resistance and water stability, the use of improved gray situation decision-making calculation of the orthogonal test for each situation of road performance and the optimal situation of gray comprehensive relevance, And by SPSS software for range and variance analysis. The results show that the gray comprehensive correlation of situation 4 is 0.943 7, and the difference of gray comprehensive relation with situation 3 is 0.081 1. The larger difference indicates that the difference between the different situations and the optimal situation is quite different. According to The comprehensive gray relational grade of the situation resulted in the ranking of 18 kinds of sample preparation programs; the difference of molding time was 2.857, the difference of aggregate gradation was 1.555, the difference between the two was 1.302, Asphalt concrete road performance with different degrees, according to the key factors of the poor draw 6 key factors on the road performance of epoxy asphalt concrete, the order of descending order of molding time, stone ratio, A, B group The ratio of mass to weight, compaction, forming temperature and aggregate gradation were compared. By comparing the mean of gray comprehensive relevancy for each key factor, we can get the best construction plan as follows: 2.9, the ratio of oil to stone is 6.5%, the aggregate level is 2.36mm, the passing rate of the mesh is designed, the forming time is 55min, the forming temperature is 120 ℃, the compaction is performed 24 times; the analysis of variance F test values ​​are greater than the critical value of 19, with good Significant. It can be seen that the improvement of gray situation decision-making can effectively evaluate the performance of epoxy asphalt concrete under different construction schemes and can be combined with the range analysis to determine the extent of the impact of the key factors on the road performance of epoxy asphalt concrete with the best Construction program.
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