玻璃纤维水泥稳定碎石路用性能研究

发布时间：2018-01-08 11:05

本文关键词：玻璃纤维水泥稳定碎石路用性能研究　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：我国高等级公路沥青路面结构多采用水泥稳定碎石作为其主要的基层材料，但水泥稳定碎石材料自身的缺陷会导致沥青路面的出现过多的裂缝等病害，严重影响了该类材料在高等级公路沥青路面中的应用。在水泥稳定碎石材料中掺入一定比例的纤维材料，是目前改善半刚性基层抗裂性能的重要手段之一。本文尝试将玻璃纤维应用于水泥稳定碎石中，研究了玻璃纤维对水泥稳定碎石路用性能的影响，提出了最佳玻璃纤维应用参数，以改善水泥稳定碎石路用性能。本文首先通过逐级填充试验设计了骨架密实结构级配水泥稳定碎石，用于后续室内试验；选取纤维长度和纤维掺量为主要研究对象，设计了9组配合比，选取抗压强度、收缩系数、耐冻系数作为指标，研究了玻璃纤维长度和掺量对水泥稳定碎石强度特性、抗裂性能以及抗冻性能的影响，并推荐了玻璃纤维的合理应用参数。研究结果表明：玻璃纤维能显著改善水泥稳定碎石材料的路用性能，玻璃纤维水泥稳定碎石的强度特性、抗裂性能以及抗冻性能均随着纤维长度（＜18mm）的增加而增加；当纤维掺量≤0.15%时，，其路用性能随着纤维含量的继续增加提升很小甚至略有降低。最终确定玻璃纤维的最佳掺量为0.15%；玻璃纤维最佳长度为18mm。
[Abstract]:The structure of asphalt pavement of high grade highway in China using cement stabilized macadam base material as its main, but the defects of cement stabilized macadam asphalt pavement itself will lead to excessive crack disease, serious impact on the application of these materials in asphalt pavement of high grade highway. The fiber material mixed with a certain proportion in the cement stabilized macadam materials, is one of the important means to improve anti cracking performance of semi rigid base. The glass fiber used in cement stabilized gravel, studied the effect of glass fiber on cement stabilized macadam performance, put forward the application of the optimum parameters of glass fiber, in order to improve the performance of cement stabilized aggregate.
Firstly, through the design of framework dense gradation of cement stabilized gravel filling test stage for subsequent laboratory tests; selection of fiber length and fiber content as the main research object, design 9 groups of mix ratio, selection of compressive strength, coefficient of shrinkage, frost resistance index as an indicator of strength characteristics of cement stabilized gravel volume and length doped glass fiber, and the effects of crack resistance of frost resistance, and recommend the reasonable application of glass fiber parameters. The results showed that the use of glass fiber can significantly improve the material of cement stabilized gravel road, strength properties of glass fiber cement stabilized macadam, crack resistance and frost resistance with fiber length (less than 18mm). Increases; when the fiber content is less than or equal to 0.15%, the road performance with the fiber content continues to increase lift is very small or even slightly decreased. The final determination of the glass fiber The optimum amount of vitamin D is 0.15%, and the optimum length of glass fiber is 18mm.

【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414

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