水泥混凝土路面局部破损快速修补材料应用研究

发布时间：2018-04-13 05:11

本文选题：环氧树脂 + 砂浆　；参考：《长安大学》2014年硕士论文

【摘要】：水泥混凝土路面因其具有强度高，寿命长，维护费用少等优点，得到了广泛的应用。水泥混凝土路面局部破损是一种常见的病害，如坑槽、孔洞、裂缝等。局部破损如果修复不及时，不仅降低道路使用寿命，还增加了维修成本。混凝土板块修复技术存在成本高、开放交通时间长等缺点，且环境差异又会造成修复技术的难度，因此，为了提高修补效率及缩短交通开放时间，需开发适于干燥及潮湿环境的水泥路面局部破损快速修补材料。本文结合水泥混凝土路面局部破损的特点，并参照相关文献，提出了修复材料技术性能要求，研究了干燥环境及潮湿环境下使用的环氧树脂修补材料，通过对环氧砂浆中骨料级配类型与用量、固化剂的种类等因素对其工作性能的影响，对修补材料的组分进行了优化，得到适用于水泥混凝土路面干燥环境和潮湿环境局部破损修补材料的初步配方。再对砂浆的强度发展规律、与旧混凝土间的粘结强度、耐腐蚀性能等进行了试验，得到优化配合比。研究结果表明：（1）不管在干燥环境还是潮湿环境下，环氧胶结料中应添加适量的活性稀释剂XY207，以降低浆液粘度，提高砂浆的工作性能及机械性能。（2）环氧砂浆强度受集料级配和砂胶比影响，使用时要综合强度、工作性和经济性再进行选择。（3）填料可以改善砂浆力学性能，对砂浆内部空隙进行填补，，提高砂浆结构致密性，还可以降低材料成本。（4）不同类型的固化剂能使环氧砂浆具有不同的强度和凝胶时间，固化剂掺入量越大，砂浆的凝胶时间越快，可操作时间越短；本文在潮湿和干燥两种环境下，采用了四种不同的固化剂和两种不同的活性稀释剂，在干燥环境下，综合考虑了砂浆的可操作时间、强度、粘结强度等因素，选用TF-30固化剂比较适宜，其早期强度大、浆体渗透性高、可操作时间适中；在潮湿环境下，以T-4为固化剂的砂浆强度发展快、早强高、粘结强度到达4.5MPa以上，因此采用固化剂T-4是最佳的选择。（5）本文所研究的两种修补材料的强度、耐腐蚀性、粘结性等方面都满足使用要求。而所提出的施工工艺简单，但实际效果仍需工程检验。
[Abstract]:Cement concrete pavement has been widely used because of its high strength, long life, low maintenance cost and so on.Local damage of cement concrete pavement is a common disease, such as potholes, holes, cracks and so on.If partial damage is not repaired in time, it not only reduces the service life of the road, but also increases the maintenance cost.In order to improve the repair efficiency and shorten the traffic opening time, the repair technology of concrete slab has the disadvantages of high cost, long open traffic time and so on, and the environmental difference will cause the difficulty of the repair technology, therefore, in order to improve the repair efficiency and shorten the traffic opening time,Rapid repair materials for local damage of cement pavement suitable for dry and wet environment need to be developed.According to the characteristics of local damage of cement concrete pavement and referring to relevant literature, the technical performance requirements of repairing materials are put forward in this paper. The epoxy resin repair materials used in dry and humid environments are studied.The composition of the repair material was optimized by the influence of the gradation type and amount of aggregate in epoxy mortar and the type of curing agent on its working performance.A preliminary formula for repairing local damage of cement concrete pavement in dry and humid conditions was obtained.The strength development law of mortar, bond strength and corrosion resistance between mortar and old concrete were tested, and the optimum mix ratio was obtained.The results show that:1) the proper amount of active diluent XY207 should be added to the epoxy binder in order to reduce the viscosity of slurry and improve the working and mechanical properties of mortar.(2) the strength of epoxy mortar is affected by aggregate gradation and sand / binder ratio.3) the filler can improve the mechanical properties of mortar, fill the inner voids of mortar, improve the compactness of mortar structure, and reduce the material cost.4) different kinds of curing agents can make epoxy mortar have different strength and gel time. The greater the amount of curing agent, the faster the gelation time and the shorter the operating time.Four different curing agents and two different active diluents were used. In dry environment, the operating time, strength and bond strength of mortar were considered synthetically. The TF-30 curing agent was suitable and its early strength was high.The mortar has high permeability and moderate operating time. In humid environment, the strength of mortar with T-4 as curing agent develops rapidly, the early strength is high, the bond strength is above 4.5MPa, so it is the best choice to use T-4 as curing agent.5) the strength, corrosion resistance and adhesion of the two kinds of repair materials studied in this paper meet the requirements of application.The proposed construction technology is simple, but the actual effect still needs engineering inspection.
【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】：U416.216;U418.6;U414

【参考文献】