河南省二灰碎石和水泥稳定碎石基层应用研究

【作者】 王卓娅；

【导师】 王选仓；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2004， 硕士

【摘要】 本课题在现有《公路路面基层施工技术规范》(JTJ034-2000)的基础上，针对河南省半刚性基层(包括二灰稳定碎石、水泥稳定碎石)应用情况选取代表地区，从其设计、材料试验和施工等方面进行全面系统的调查与分析。较全面地反映了河南全省这两种半刚性基层的综合状况，在调查研究的基础上提出适合河南全省的地方行业标准。 本论文首先对河南省二灰碎石和水泥稳定碎石的原材料(石灰、粉煤灰、水泥以及碎石等)进行了详细系统的分析，提出了适合河南省自身特点的原材料应用性能指标；同时分析了现行规范在基层集料级配范围上的不足之处，给出了河南省合理的集料级配范围，并建议使用生石灰粉代替消石灰，以提高二灰稳定碎石基层的早期强度；其次论文对现行的用重型击实法测最大干密度的方法提出了异议，并推荐使用振动击实成型方法测混合料的最大干密度。 结合河南省具体情况，论文还给出了二灰稳定碎石和水泥稳定碎石的合理的施工工艺与质量控制要点，分析和总结了二灰和水泥稳定碎石基层混合料离析的原因、解决方法以及控制基层平整度等问题；最后系统地分析了基层产生裂缝的原因以及影响裂缝产生的因素，并给出了避免和防治裂缝的各种措施。更多还原

【Abstract】 On the basis of the existing technical specifications for highway base construction, we have selected semi-rigid base (include stabilized macadam-limeflyash and stabilized macadam-cement) from several quite typical regions within the boundaries of Henan province, moreover, we make a comprehensive and systematic investigation and analysis from the aspects of design , material test and construction . The study reflects the integrated state of the structure of the base in Henan province comparatively overall, which can make further improvement on the construction quality of the base and put forward a criterion of local trade fitting whole Henan province.Firstly, the thesis makes a detailed and systematic analysis about raw material of stabilized macadam-limeflyash and stabilized macadam-cement(lime, flyash, cement , macadam) and formulate the behavior index of the material in service fitting whole Henan province. Having analyzed the shortcomings of the existing specifications in grading envelope of base aggregates, we pose a reasonable grading envelope of aggregates in Henan province. We recommend that using calcined lime substituting for hydrated lime to improve the early strength of the stabilized macadam-limeflyash base. At the same time we raise an objection on the method of testing maximum dry density through heavy compaction devices and adopt the vibrating compaction.According the concrete conditions of Henan province, we raise the reasonable construction craft on stabilized macadam-limeflyash and stabilized macadam-cement; furthermore we summarize the accidents in construction and the methods of disposing of them. Having analyzed and summarized these problems such as isolation reasons of mixture, methods of solving them and the base smoothness. Last, we analyze the reason of producing cracks and its influence factors, providing the measures of preventing and remedying the cracks.更多还原