不同形状假设下沥青混凝土级配快速识别效果对比
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摘要
为提高沥青混凝土级配识别的精度,采用数字图像处理技术对沥青混凝土的平面级配进行统计分析,利用数值算法获得不同形状颗粒剖切后截面尺寸分布概率。对沥青混凝土的平面级配进行体视学转换,识别出沥青混凝土的三维真实级配,并对推测级配进行试验验证。研究结果表明:集料假设的形状不同,剖切后的截面尺寸分布概率也各不相同。采用椭球形集料假设进行体视学转换可以准确推测沥青混凝土的真实级配,避免对识别结果进行二次修正。集料的形状假设对体视学转化结果具有显著影响,建议在对平面级配进行体视学转换时采用椭球形集料假设,同时此方法亦可用于其他复合材料内部组成的定量推测。
In order to improve the recognized accuracy of gradation for asphalt concrete, the digital image processing technique was used to analyze the planar gradation statistically. The distributed probabilities of cross-section size for different particles were obtained using a numerical method. The planar gradation of asphalt concrete was converted by stereological method, a real three dimensional gradation of asphalt concrete was recognized finally, and the estimated gradation was verified with experiments. The results show that the distributed probabilities of cross-section size are different if the aggregates are assumed as different shapes. The real gradation of asphalt concrete can be estimated accurately by stereological conversion based on the assumption of ellipsoidal aggregate, this result of gradation doesn't need to be corrected once again. When the stereological conversion is conducted, the assumed shape of aggregate has a significant impact on the converted results. It is recommended that the assumption of ellipsoidal aggregate be used for the stereological conversion on planar gradation. This method can also be used to evaluate the internal composition quantitative for other composite materials.
In order to improve the recognized accuracy of gradation for asphalt concrete, the digital image processing technique was used to analyze the planar gradation statistically. The distributed probabilities of cross-section size for different particles were obtained using a numerical method. The planar gradation of asphalt concrete was converted by stereological method, a real three dimensional gradation of asphalt concrete was recognized finally, and the estimated gradation was verified with experiments. The results show that the distributed probabilities of cross-section size are different if the aggregates are assumed as different shapes. The real gradation of asphalt concrete can be estimated accurately by stereological conversion based on the assumption of ellipsoidal aggregate, this result of gradation doesn't need to be corrected once again. When the stereological conversion is conducted, the assumed shape of aggregate has a significant impact on the converted results. It is recommended that the assumption of ellipsoidal aggregate be used for the stereological conversion on planar gradation. This method can also be used to evaluate the internal composition quantitative for other composite materials.
引文
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[8]郭庆林,沥青混合料内部应力分布及其对粘弹性能的影响研究[D].长春:吉林大学, 2013.GUO Qinglin. Research on internal stress distribution of asphalt mixture and its impact on viscoelastic performance[D]. Changchun:Jilin University, 2013.
[9]吴文亮,王端宜,张肖宁,等.沥青混合料级配的体视学推测方法[J].中国公路学报, 2009, 22(5):29-33.WU Wenliang, WANG Duanyi, ZHANG Xiaoning, et al.Stereology method of estimating gradation of asphalt mixtures[J]. China Journal of Highway and Transport,2009, 22(5):29-33.
[10]黄碧霞.体视学与图像分析技术在沥青混合料级配分析中的应用[D].成都:西南交通大学, 2007.HUANG Bixia. Gradation analysis of asphalt mixture based on digital image analysis and stereology[D].Chengdu:Southwest Jiaotong University, 2007.
[11] Dai Q, Sadd M H, You Z. A micromechanical finite element model for linear and damage-coupled viscoelastic behavior of asphalt mixture[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 2006, 30:1135-1158.
[12] Sahagian D L, Proussevitch A A. 3D particle size distributions from 2D observations:stereology for natural applications[J]. Journal of Volcanology and Geothermal Research, 1998, 84:173-196.
[13] JTG E42—2005,公路工程集料试验规程[S].JTG E42—2005, Test methods of aggregates for highway engineering[S].
[2]申爱琴,蒋庆华,祁秀林.矿料级配对沥青混合料路用性能的影响[J].长安大学学报(自然科学版), 2002,22(6):1-4.SHEN Aiqin, JIANG Qinghua, QI Xiulin. Influence of aggregate grading on performance of asphalt mixture[J].Journal of Chang’an University(Natural Science Edition),2002, 22(6):1-4.
[3] JTG E20—2011,公路工程沥青及沥青混合料试验规程[S].JTG E20—2011, Standard test methods of bitumen and bituminous mixtures for highway engineering[S].
[4] Mora C F, Kwan A K H, Chan H C. Particle size distribution analysis of coarse aggregate using digital image processing[J]. Cement and Concrete Research,1998, 28(6):921-932.
[5]汪海年,郝培文,庞立果,等.基于数字图像处理技术的粗集料级配特征[J].华南理工大学学报(自然科学版), 2007, 35(11):54-62.WANG Hainian, HAO Peiwen, PANG Liguo, et al.Investigation into grading characteristic of coarse aggregate via digital image processing technique[J].Journal of South China University of Technology(Natural Science Edition), 2007, 35(11):54-62.
[6] Leonardo Bruno, Giuseppe Parla, Clara Celauro. Image analysis for detecting aggregate gradation in asphalt mixture from planar images[J]. Construction and Building Materials, 2012, 28(1):21-30.
[7] Vadood M, Johari M S, Rahaei A R. Introducing a simple method to determine aggregate gradation of hot mix asphalt using image processing[J]. International Journal of Pavement Engineering, 2014, 15:142-50.
[8]郭庆林,沥青混合料内部应力分布及其对粘弹性能的影响研究[D].长春:吉林大学, 2013.GUO Qinglin. Research on internal stress distribution of asphalt mixture and its impact on viscoelastic performance[D]. Changchun:Jilin University, 2013.
[9]吴文亮,王端宜,张肖宁,等.沥青混合料级配的体视学推测方法[J].中国公路学报, 2009, 22(5):29-33.WU Wenliang, WANG Duanyi, ZHANG Xiaoning, et al.Stereology method of estimating gradation of asphalt mixtures[J]. China Journal of Highway and Transport,2009, 22(5):29-33.
[10]黄碧霞.体视学与图像分析技术在沥青混合料级配分析中的应用[D].成都:西南交通大学, 2007.HUANG Bixia. Gradation analysis of asphalt mixture based on digital image analysis and stereology[D].Chengdu:Southwest Jiaotong University, 2007.
[11] Dai Q, Sadd M H, You Z. A micromechanical finite element model for linear and damage-coupled viscoelastic behavior of asphalt mixture[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 2006, 30:1135-1158.
[12] Sahagian D L, Proussevitch A A. 3D particle size distributions from 2D observations:stereology for natural applications[J]. Journal of Volcanology and Geothermal Research, 1998, 84:173-196.
[13] JTG E42—2005,公路工程集料试验规程[S].JTG E42—2005, Test methods of aggregates for highway engineering[S].