1 书 书 书 ! 52 " ! 1 # 2017 $ 2 % & ' ( ) * + + , JOURNAL OF SOUTHWEST JIAOTONG UNIVERSITY Vol. 52 No. 1 Feb. 2017 !"#$
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2017,
52(
1):
6974.ZENG Xiaohui
,
DAI Yapeng,
QU Fulin,
et al. Morphology of limestone manufactured sand based on image processing technology[
J]
. Journal of Southwest Jiaotong University,
2017,
52(
1):
6974. .123:
02582724(
2017)
01006906 DOI:
10. 3969 / j. issn. 02582724. 2017. 01. 010%456789:;<=<>?@ABCD
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TU521. 1 .MNOP:
AMorphology of Limestone Manufactured Sand
Based on Image Processing Technology
ZENG Xiaohui1,
DAI Yapeng1,
QU Fulin1,
YE Yuezhong1,
XUE Yuan2,
WANG Zhimeng2,
ZHENG Yongfei2(
1. School of Civil Engineering,
Southwest Jiaotong University,
Chengdu 610031,
China;
2. China Railway Eryuan Engineering Group Co. Ltd.,
Chengdu 610031,
China)
Abstract:
To quantitatively study the morphological characteristics and regularity of limestone manufactured sand with different particle sizes,
digital images of 6 size fractions in total,
4. 750 2. 360,
2. 360 1. 180,
1. 180 0. 600,
0. 600 0. 300,
0. 300 0. 150 mm and 0. 150 0. 075 mm(
sample size of each size fraction is 500),
were collected by digital camera and stereomicroscope. Based on digital image processing(
DIP),
the circularity,
aspect ratio and sphericity of samples were quantitatively determined using software ImagePro Plus. While the fractal dimension of limestone manufactured sand was calculated according to fractal theory. Besides,
statistical analysis was used for the morphology characteristics,
and the morphology parameters of limestone manufactured sand and river sand were compared. The results indicate that the circularity,
aspect ratio and sphericity of limestone manufactured sand with different sizes basically obey the normal distribution. For different2 ! " # $ % & & ' ( 52 ) size fractions
,
the changes of circularity,
aspect ratio,
sphericity and fractal dimension are consistent,
signifying that the morphology parameters of limestone manufactured sand or river sand can be characterized by either one of these parameters. The circularity,
aspect ratio and sphericity of limestone manufactured sand are 0. 834 0. 857,
0. 693 0. 705 and 0. 793 0. 799,
less than those of river sand by 5. 0%,
7. 2% and 3. 3%,
respectively,
while its fractal dimension reaches 1. 046 1. 056,
higher than that of the river sand by 3. 2% . Finally,
the recommended ranges of roundness,
aspect ratio,
sphericity and fractal dimension in the process of manufactured sand shaping were provided,
i. e.,
0. 880 1. 000,
0. 740 1. 000,
0. 820 1. 000 and 1. 010 1. 025. Key words:
manufactured sand;
morphology;
digital image processing;
fractal dimension ÐÑÒ-mÓ、
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γ À{|`ab¡´YúV·¸¡´. W 1 4. 750 ~ 2. 360 mm ^_^ `ab¡´¿FW Fig. 1 Circularity histogram of 4. 750 2. 360 mm limestone manufactured sand W 2 4. 750 ~ 2. 360 mm ^_ ^`ab·¸¡´ QQ W Fig. 2 Normal QQ plot of circularity of 4. 750 2. 360 mm limestone manufactured sand åD 5 Ã{|]^_n`ab4{õY úµ¶·¸¡´. Ï{|¨<°±Ð² 1 Ñ. Ȳ 1 ÁÉ,
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UVÁÖHyÐ`ab{ |׺2׺. d 1 efgh<=<>?@bcijkl Tab. 1 Statistical results of circularity of limestone manufactured sand with different sizes øïN 67 / mm Êo @A # Ò Ó º »ÎÏ 4. 750 ~ 2. 360 0. 857 0. 060 0. 141 - 0. 886 0. 430 2. 360 ~ 1. 180 0. 837 0. 063 0. 747 - 0. 637 0. 436 1. 180 ~ 0. 600 0. 834 0. 062 0. 105 - 0. 729 0. 412 0. 600 ~ 0. 300 0. 846 0. 067 0. 890 - 0. 897 0. 409 0. 300 ~ 0. 150 0. 845 0. 071 - 0. 179 - 0. 119 0. 484 0. 150 ~ 0. 075 0. 854 0. 063 0. 440 - 0. 749 0. 338 2. 2 mnoa G Ar(
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ÁqRö{|{c. d 5 efghv@AB`a Tab. 5 Morphology parameters of river sand with different sizes øïN 67 / mm Êo Êo G Êo ¡c ¤ 4. 750 ~ 2. 360 0. 897 0. 756 0. 828 1. 016 2. 360 ~ 1. 180 0. 884 0. 755 0. 826 1. 013 1. 180 ~ 0. 600 0. 889 0. 759 0. 820 1. 021 0. 600 ~ 0. 300 0. 887 0. 748 0. 818 1. 021 0. 300 ~ 0. 150 0. 900 0. 752 0. 822 1. 020 0. 150 ~ 0. 075 0. 882 0. 755 0. 827 1. 018 W 8 yz{|^_^`ab¬bcd¥¯ Fig. 8 Morphology parameters comparison of limestone manufactured sand and river sand with different sizes ÈW 8 ÁáÈ,
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