纤维沥青碎石封层层间粘结性能及其影响因素

发布时间：2018-05-18 01:20

本文选题：纤维沥青 + 试件成型　；参考：《武汉理工大学学报》2014年02期

【摘要】：为了研究纤维碎石封层层间粘结性能的影响因素,在碎石封层强度形成机理及抗裂机理理论分析的基础上,采用直接拉拔试验和正压扭剪试验评价碎石封层层间抗拉性能和层间抗剪性能,利用正交试验深入分析乳化沥青用量、碎石用量、纤维用量、纤维长度4个因素对纤维碎石封层层间粘结性能的影响。研究发现影响层间抗拉强度的程度表现为:乳化沥青用量碎石用量纤维长度纤维用量;影响层间抗剪强度的程度表现为:乳化沥青用量碎石用量纤维用量纤维长度;通过直接拉拔试验和正压扭剪试验表明,当纤维沥青碎石封层采用5~10mm集料粒径时,碎石撒布量13kg/m2、乳化沥青洒布量2.0kg/m2、纤维用量100g/m2、纤维长度60mm,纤维碎石封层可取得最佳的层间粘结性能。有关结论可为纤维沥青碎石封层设计与施工提供参考。
[Abstract]:In order to study the influencing factors of bond properties between layers of fiber crushed stone seal, the forming mechanism of strength and the mechanism of crack resistance of the sealing layer are analyzed theoretically. The tensile and interlaminar shear properties of crushed stone seal were evaluated by direct drawing test and positive pressure torsional shear test. The amount of emulsified asphalt, crushed stone and fiber was analyzed by orthogonal test. The influence of four factors of fiber length on the bond property between layers of fiber-macadam seal. It was found that the degree of influence on the interlaminar tensile strength was as follows: the amount of emulsified asphalt and the amount of fiber, the degree of influence of interlaminar shear strength were as follows: the amount of emulsified asphalt and the amount of crushed stone fiber length; Through the direct drawing test and the positive pressure torsional shear test, it is shown that when the 5~10mm aggregate particle size is used in the sealing layer of fibrous asphalt macadam, The best interlaminar bonding property can be obtained by using 13kg / m ~ (2) of gravel, 2.0 kg / m ~ (2) of emulsified asphalt, 100 g / m ~ (2) of fiber, and 60 mm of fiber length. The conclusions can be used as reference for the design and construction of fiber-asphalt macadam seal.
【作者单位】：长安大学特殊地区公路工程教育部重点实验室;天津城建设计院有限公司;
【基金】：国家自然科学基金(50478095)
【分类号】：U414

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