桥面铺装材料结构组合与防水粘结层性能研究

发布时间：2018-03-02 17:38

本文选题：桥面铺装　切入点：SBS改性沥青　出处：《吉林大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来我国交通基础设施发展迅猛，公路桥梁建设如火如荼。作为桥梁的重要组成部分，桥面铺装可以减轻行车载荷对桥面板的冲击，能够保证行车的舒适性和安全性。因此，针对桥面铺装层性能的研究显得极为重要。本文依托《快速路高架桥桥面铺装典型结构与材料研究》项目，重点针对铺装材料的组合设计与防水粘结层的选择进行深入研究，对现有桥面铺装材料的组合设计进行改进，对防水粘结层的路用性能进行对比，力求延长桥面铺装层的使用寿命，提高桥面铺装层的使用耐久性，最终提出适合季冻区气候环境的桥面铺装层与防水粘结层的最优组合。本文主要进行如下研究工作：（1）对沥青混凝土所用基质沥青、粗细集料以及填料性能进行了测试，得到试验结果均满足技术规范中相关要求。为了提升沥青的高低温性能以及耐久性能，采用应用最为广泛的SBS改性剂对基质沥青进行改性，，并对不同掺量SBS改性沥青进行针入度、软化点、延度、弹性恢复布氏试验。综合3%、4%及5%掺量的SBS改性沥青性能试验结果确定掺量5%为最佳掺量，在实际工程中采用5%掺量SBS改性沥青作为沥青混凝土胶结料。（2）通过对上下层沥青混合料进行配合比设计，确定了AC-13C SBS改性沥青混合料与AC-16C基质沥青混合料的合成级配曲线，并经试验验证得到上下层沥青混合料中SBS改性沥青最佳油石比。通过对上下层沥青混合料进行车辙试验、小梁弯曲试验以及冻融劈裂试验，验证了AC-13C SBS改性沥青混合料与AC-16C基质沥青混合料的高温稳定性、低温抗裂性以及水稳定性。（3）通过材料比选，确定将7611型环氧沥青、SBS改性沥青和AMP-100二阶反应型防水粘结材料3种防水粘结材料作为备选材料。首先通过基本性能试验确定了三种防水粘结材料的基本物理性质和力学性质。之后，通过斜剪试验、直剪试验和直接拉伸试验对其路用性能进行研究。通过研究发现，AMP-100二阶反应型防水粘结材料相对于7611型环氧沥青防水粘结料和SBS改性沥青，有较高的斜剪强度、直剪强度和直接拉伸强度。
[Abstract]:As an important part of bridge, bridge deck pavement can reduce the impact of driving load on bridge deck, and ensure the comfort and safety of driving, because of the rapid development of transportation infrastructure and the construction of highway bridge in China in recent years. Therefore, as an important part of bridge, bridge deck pavement can reduce the impact of driving load on bridge deck. It is very important to study the performance of bridge deck pavement. Based on the project of "study on typical structure and Materials of Bridge Deck pavement of Expressway Viaduct", this paper focuses on the combination design of pavement material and selection of waterproof adhesive layer, and improves the combination design of existing bridge deck pavement material. The road performance of waterproof adhesive layer is compared in order to prolong the service life of bridge deck pavement and improve the durability of bridge deck pavement. Finally, the optimal combination of bridge deck pavement and waterproof adhesive layer suitable for seasonal climate environment is put forward. The main work of this paper is as follows:. 1) the performance of asphalt matrix, coarse aggregate and filler used in asphalt concrete is tested, and the results show that the test results all meet the relevant requirements of the technical specification, in order to improve the high and low temperature performance and durability of asphalt, The most widely used SBS modifier was used to modify the asphalt matrix, and the penetration, softening point and ductility of the modified asphalt with different SBS content were studied. Based on the results of 3% and 5%% SBS modified asphalt performance tests, it is determined that 5% is the best content, and 5% SBS modified asphalt is used as asphalt concrete binder in practical engineering. (2) the composite gradation curve of AC-13C SBS modified asphalt mixture and AC-16C matrix asphalt mixture is determined by the mix ratio design of upper and lower layer asphalt mixture. The optimum bitumen ratio of SBS modified asphalt in upper and lower layer asphalt mixture is obtained by test. Through rutting test, trabecular bending test and freeze-thaw splitting test, the asphalt mixture of upper and lower layers is tested. The high temperature stability, low temperature crack resistance and water stability of AC-13C SBS modified asphalt mixture and AC-16C matrix asphalt mixture were verified. (3) through material comparison, Three kinds of waterproof adhesive materials, 7611 epoxy asphalt modified bitumen and AMP-100 second-order reactive waterproof binder, were selected as alternative materials. Firstly, the basic physical properties of the three waterproof binders were determined through basic performance tests. And mechanical properties. Through oblique shear test, direct shear test and direct tensile test, it is found that the second order reactive waterproof binder of AMP-100 has higher skew shear strength than 7611 epoxy asphalt waterproof binder and SBS modified asphalt. Direct shear strength and direct tensile strength.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U444;U443.33

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