SBS改性沥青质量控制技术及应用研究

发布时间：2018-01-23 03:51

本文关键词： SBS改性沥青原材料质量控制加工工艺参数层次分析方法过程控制图　出处：《长安大学》2015年硕士论文　论文类型：学位论文

【摘要】：SBS改性沥青由于其良好的高、低温性能及较低的温度敏感性,广泛应用于高等级公路沥青路面施工中。早期的工程实践表明,使用SBS改性沥青能够显著的提高沥青路面抗车辙性能,减少沥青路面裂缝,增强沥青与集料间的粘附性,降低路面水损坏,延长路面使用寿命。然而,近年来,随着改性沥青现场加工的普及,一些实体工程应用发现,尽管SBS改性沥青在试验中表现出良好的性能,但在路面实际应用中的表现并不尽如人意,这主要是由于SBS改性沥青加工方式多样,同时对原材料和加工参数的选用凭借工程施工经验,缺乏严谨的理论依据。对于改性沥青原材料质量的控制,鉴于传统的基质沥青检测指标及PG分级指标很难进行不同品质的区分,对用于改性的基质沥青除检测传统指标和PG分级指标外对其进行红外光谱分析,结果表明:沥青的红外光谱分析可以很好的区分不同油源的基质沥青。研究剪切温度、剪切时间、剪切速率、发育时间等对改性沥青性能的影响,分别确定了星型和线型SBS改性沥青加工工艺参数。同时为了能够充分发挥线型SBS良好的低温塑性和星型SBS改性剂良好的高温稳定性,对星型与线型SBS改性剂的复配工艺进行了研究,推荐了复配SBS改性沥青生产原材料比例和工艺参数。研究原材料对改性沥青性能的影响,分别对5种基质沥青、5种改性剂、两种芳烃油和6种稳定性剂进行了分析,确定了SBS改性剂与基质沥青之间的配伍性、芳烃油的选择标准以及稳定剂对改性沥青性能的影响规律及其最佳掺量。针对SBS改性沥青各影响因素建立层次分析模型,分析加工工艺参数和原材料对改性沥青各项指标的影响程度,以便在改性沥青加工过程中及时调整各项参数,保证改性沥青质量稳定性。进行改性沥青现场加工生产和工厂化生产,并对改性沥青检测结果使用控制图分析其质量稳定性,结果表明:工厂化生产的SBS改性沥青的质量更加稳定可靠。
[Abstract]:SBS modified asphalt is widely used in asphalt pavement construction of high-grade highway because of its good performance of high temperature, low temperature and low temperature sensitivity. The use of SBS modified asphalt can significantly improve the rutting resistance of asphalt pavement, reduce the crack of asphalt pavement, enhance the adhesion between asphalt and aggregate, reduce the water damage of pavement, and prolong the service life of pavement. In recent years, with the popularity of modified asphalt field processing, some solid engineering applications found that although SBS modified asphalt in the test showed good performance, but in the actual application of pavement performance is not satisfactory. This is mainly due to the variety of SBS modified asphalt processing methods, at the same time, the selection of raw materials and processing parameters based on engineering construction experience, lack of rigorous theoretical basis for the quality control of modified asphalt raw materials. In view of the traditional matrix asphalt detection index and PG classification index is difficult to distinguish the different quality, the matrix asphalt used for modification in addition to the detection of traditional indicators and PG classification index of infrared spectrum analysis. The results show that the infrared spectrum analysis of asphalt can distinguish the matrix asphalt from different oil sources. The effects of shear temperature, shear time, shear rate and development time on the performance of modified asphalt are studied. The processing parameters of starlike and linear SBS modified asphalt were determined, and the good low temperature plasticity of linear SBS and the good high temperature stability of star SBS modifier were also given in order to give full play to the low temperature plasticity of linear SBS and the high temperature stability of star type SBS modifier. The blending process of star type and linear SBS modifier was studied, the ratio of raw materials and technological parameters of compound SBS modified asphalt was recommended, and the influence of raw materials on the performance of modified asphalt was studied. Five modifiers, two aromatics oils and six stabilizers were analyzed, and the compatibility between SBS modifier and base asphalt was determined. The selection standard of aromatics oil and the influence of stabilizer on the performance of modified asphalt and its optimum content were studied. The analytic hierarchy process (AHP) model was established for the factors affecting SBS modified asphalt. The influence of processing process parameters and raw materials on the indexes of modified asphalt is analyzed in order to adjust the parameters in time during the processing of modified asphalt. To ensure the quality stability of modified asphalt. The field processing and factory production of modified asphalt were carried out, and the quality stability of modified asphalt was analyzed by using control chart. The results show that the quality of SBS modified asphalt produced by factory is more stable and reliable.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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