寒区路面混凝土耐久性评价指标体系研究

发布时间：2018-01-05 09:09

本文关键词：寒区路面混凝土耐久性评价指标体系研究　出处：《东北林业大学》2015年硕士论文　论文类型：学位论文

【摘要】：耐久性对混凝土寿命极其重要。但近年来,由于荷载、施工、养护等原因,水泥混凝土路面因耐久性不足引起的破坏非常严重。尤其在寒冷地区,这种破坏现象更是屡见不鲜。研究寒区路面混凝土耐久性评价指标体系,可为寒区路面混凝土耐久性综合评价和寿命预测提供依据,从而更好地指导寒区路面混凝土耐久性设计。既然如此,首先要解决的关键问题就是建立起适合于寒区路面混凝土耐久性评价的指标体系。因此,本文依托前嫩公路龙镇至嫩江段,以黑龙江省为区域背景,对该区域内水泥混凝土路面耐久性破坏现状进行实地调查,取样进行室内试验,从材料层次分析导致寒区路面混凝土耐久性破坏的主要原因,结合现有理论分析耐久性破坏机理；在确定耐久性破坏原因的基础上,有针对性地分析相关规范和前人研究中述及的耐久性评价指标,根据指标体系的建立原则,建立初拟评价指标体系,并借助模糊优先排序法对初拟指标进行优化,结合专家意见,得到最终寒区路面混凝土耐久性评价指标体系；针对体系中抗冻性和抗氯离子渗透性指标,采用快速冻融循环法、直线导线法、电通量法和RCM法进行指标敏感性分析,主要通过指标两两比较相对值的方法来确定指标的敏感程度,找出对耐久性较敏感的指标,根据工程操作的难易程度,将敏感性指标划分为室内试验阶段和现场施工阶段的两阶段评价指标；基于动态控制原理,对依托项目现场施工阶段的含气量和电通量指标实施动态监控。
[Abstract]:The durability of concrete is very important to life. But in recent years, due to load, construction, maintenance and other reasons, the cement concrete pavement caused by durability damage is very serious. Especially in cold regions, this destruction phenomenon is the research of cold resistance of concrete pavement It is often seen.. The evaluation index system for a long time, can provide the basis for the durability of concrete comprehensive evaluation and life prediction of pavement in cold regions, so as to better guide the durability design of concrete pavement in cold region. So, the key problem is the first to solve the established index system for the evaluation of the durability of concrete pavement in cold region. Therefore, based on the former Highway Tender dragon town to Nenjiang, taking Heilongjiang Province as the regional background of investigation on the regional cement concrete pavement durability damage situation, sampling of indoor test, from the material level analysis lead to cold area pavement concrete The main reason of concrete durability damage, combined with the analysis of durability damage mechanism of the existing theory; based on determining the causes of damage of durability, the durability analysis of evaluation index and the previous research in the relevant norms and sex, according to the principles of establishing the index system, established at the beginning of the proposed evaluation index system, and with the help of fuzzy prioritization method to optimize the initial indicators, combined with expert opinion, get the final cold pavement concrete durability evaluation index system; the frost resistance and chloride ion permeability index system, using the fast freeze-thaw method, linear traverse method, flux method and RCM method of index sensitivity analysis method mainly through comparison of the relative value of the 22 indicators to determine the sensitivity index, find out the sensitive to the durability index, according to the degree of difficulty of project operation, the sensitivity index is divided into indoor test The two stage evaluation index of inspection stage and on-site construction stage; based on the dynamic control principle, dynamic monitoring is carried out based on the gas content and electric flux index of the on-site construction stage of the project.

【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.216

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