水泥混凝土宏观性能与孔结构量化关系模型

发布时间：2018-04-03 00:24

本文选题：混凝土　切入点：孔结构　出处：《哈尔滨工程大学学报》2015年11期

【摘要】：为建立水泥混凝土宏观与微观性能之间的量化关系,以交通基础设施经常承受的干湿循环、氯盐侵蚀、碳化和冻融循环4种劣化因素为对象,设计了模拟自然环境的多种劣化因素综合作用的水泥混凝土室内耐久性试验方法。分别测试混凝土的宏观和微观性能,提出相对变化率概念,并给出相对变化率指标的计算方法。运用层次分析法、归一化方法以及灰色关联理论,计算宏微观性能关联度及孔结构对宏观性能的影响权重。最终建立了微观孔结构特征变化与宏观性能变化之间的量化关系模型。通过测试混凝土微观孔结构参数变化,运用该模型,可以推算出混凝土宏观性能的劣化程度。
[Abstract]:In order to establish the quantitative relationship between macroscopic and microscopic properties of cement concrete, four degradation factors, such as dry-wet cycle, chloride erosion, carbonization and freeze-thaw cycle, which are often suffered by traffic infrastructure, are taken as objects.The indoor durability test method of cement concrete is designed, which simulates various deterioration factors of natural environment.The macro and micro properties of concrete were tested, the concept of relative rate of change was put forward, and the calculation method of relative rate of change index was given.By using the analytic hierarchy process (AHP), the normalization method and the grey correlation theory, the relation degree of macro and micro performance and the weight of the influence of pore structure on macro performance are calculated.Finally, the quantitative relationship model between the change of micropore structure and the change of macroscopic performance is established.The deterioration degree of concrete macroscopical properties can be calculated by measuring the change of microstructure parameters of concrete and using the model.
【作者单位】：清华大学土木系建筑材料研究所;交通运输部公路科学研究所;北京工业大学交通学院;
【基金】：国家自然科学基金资助项目(51278016)
【分类号】：TU528

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