【作者】 苏泉；

【导师】 李艳春；

【作者基本信息】 河北工业大学 ， 结构工程， 2002， 硕士

【摘要】 断板问题一直是困扰水泥混凝土路面发展的主要问题。本文在全面系统地分析了水泥混凝土路面断板影响因素的基础上，通过现场试验分析，确定了导致断板率较高的最主要影响因素有如下几个方面： 1．切缝时间控制不当，切缝时间过晚； 2．水灰比控制不准确，超标准现象严重； 3．温度应力引起的断板； 4．养护方法不正确，洒水养生不及时。 并针对上述问题，通过试验分析及理论推倒提出了相应的预防措施与质量控制指标、现场控制方法。并通过试验路的实施获得了较好的效果。因此，将对改善我省白色路面的施工质量、降低断板率有着积极的指导意义。 同时，对断板后的维修处理方法也进行了系统的研究，根据断板的破坏程度，提出了相应的处理措施。对今后混凝土路面断板的修补会起到重要的指导作用。更多还原

【Abstract】 In the paper the factors that may cause slab breaking of cement concrete pavement are analyzed thorougly and systematically. It is believed that slab breaking is closely related to material quality, material composition, concrete vibrating, curing, evironmental condition, joint sawing, construction competence and management of contractor and employer, and others. From analysing to in-situ experiments high slab breaking ratio is mainly caused by the following.1. Sawing time is improperly controlled, sawing time being too late;2. Water-cement ratio is inaccurately mntrolled, very serious in exceeding that as specified;3. Slab breaking induced by thermal stress;4. Incorrect curing methods are adopted. Curing with water spreading is not handled in time. With regard to the afore-mentioned problems, corresponding preventive measures, qulity control indices and site control approach are presented based on expeeriments and analysing worlx. Application in test roads has received prominent effects. The research work of this project is of great significance in actively improving the construction quality and decreasing the slab breaking ratio for cement concrete pavement construction in the province.Furthermore considering that cement concrete pavement is developing rapidly in the province and that we are soon facing with remedial and mantenance problems, detailed study was also performed on remedial and maintenance methods for broken slabs. Mix design, construction method and techological procedure for fast-setting concrete are proposed. The research findings will act as a guidance for repairing broken slabs of cement concrete pavements in the province.更多还原