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水泥混凝土宏观性能与孔结构量化关系模型

DOI: 10.11990/jheu.201407013

Keywords: 混凝土, 孔结构, 宏观性能, 灰色关联, 层次分析法

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Abstract:

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。

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