粗集料形态特征与水稳层抗压强度灰色关联度分析

Grey Correlation Degree Analysis of Coarse Aggregate Morphological Characteristics and Compressive Strength of Water-stabilized Layer

为分析不同粗集料的形态特征与水泥稳定碎石基层无侧限抗压强度之间的相关性,本文通过室内试验结果再结合灰色综合关联度分析理论,研究实际工程中粗集料5个形态特征指标参数对水泥稳定碎石基层无侧限抗压强度的关联度。研究结果表明:粗集料形态特征参数中轴向系数对水稳层抗压强度影响最大,其次依次为圆度、棱角参数、粗糙度、凸度;凸度与水稳层无侧限抗压强度之间的相关性保持在相对稳定状态;三档粒径范围内,粗集料粒径越大,轴向系数、圆度、棱角参数和粗糙度与水稳层抗压强度的关联度越高。本文的研究结果可为今后类似工程提供借鉴。

In order to analyze the correlation between the shape characteristics of different coarse aggregates and the unconfined compressive strength of cement-stabilized crushed stone base,the correlation degree of 5 shape characteristics parameters of coarse aggregates on the unconfined compressive strength of cement-stabilized crushed stone base in practical engineering was studied by combining the results of laboratory tests and the theory of grey comprehensive correlation degree analysis.The results show that the axial coefficient of the coarse aggregate morphology has the greatest influence on the compressive strength of the water-stable layer,followed by roundness,angular parameters,roughness and convexity.The correlation between the convexity and the unconfined compressive strength of the water-stabilized layer remains relatively stable.In the range of three sizes,the larger the coarse aggregate size is,the higher the correlation degree between axial coefficient,roundness,angular parameters and roughness and the compressive strength of the water stable layer is.The research results of this paper can provide reference for similar projects in the future.