级配对沥青混合料集料离析的影响

彭余华; 沙爱民; 梁汉成; 雷宇

级配对沥青混合料集料离析的影响

1.
长安大学特殊地区公路工程教育部重点实验室, 陕西西安 710064
2.
大港油田集团路桥工程有限责任公司, 天津 300280
3.
中交第一公路勘察设计研究院, 陕西西安 710075

基金项目:

国家西部交通建设科技项目 2003 318 223 34

详细信息

作者简介:
彭余华(1973-), 男, 安徽池州人, 长安大学副教授, 工学博士, 从事道路工程研究

中图分类号: U414
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- 被引次数: 0
出版历程
- 收稿日期: 2008-01-15
- 刊出日期: 2008-10-25

Influence of gradations on aggregate segregations of asphalt mixtures

1.
Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China
2.
Dagang Oilfield Group Highway-Bridge Engineering Co.Ltd., Tianjin 300280, China
3.
The First Highway Survey and Design Institute of China Co.Ltd., Xi'an 710075, Shaanxi, China

More Information

Author Bio:
PENG Yu-hua (1973-), male, associate professor, PhD, +86-29-82336650, pyh@91.chd.edu.cn

摘要

摘要: 为了比较不同级配类型的沥青混和料在施工过程中产生集料离析的差异程度, 通过调整拌和楼热料仓比例生产出具有代表性的7种级配类型沥青混和料, 分析了其摊铺后在横断面上不同位置的颗粒组成状况, 混和料经碾压成型后, 测定其在横断面上不同位置的构造深度, 并评价其数值特征。研究结果表明: 在相同条件下, 产生集料离析程度由大到小的沥青混和料级配为: 反S型、间断级配、最大密度曲线之上微弓型、S型、0.45次方最大密度曲线、含中间粒径较多的级配、最大密度曲线之下微弓型。
- 路面工程 /
- 沥青混合料 /
- 集料离析 /
- 级配调整
Abstract: In order to compare the different degrees of the aggregate segregations for asphalt mixtures with different gradation types during construction, seven kinds of asphalt mixtures with typical gradation types were produced by adjusting the scale of hot bunker at mixer plant, and the granulometric composition conditions at different positions on cross section after spreading were analyzed.After the mixtures were rolled and molded, their construct depthes were measured at different positions on cross section, and their numerical characteristics were evaluated.Analysis result shows that, on the same condition, the gradations that influence the degrees of the aggregate segregations from large to small were in the following order: counter S type, discontinuous type, the micro bow type that is over the ultimate density curve, S type, 0.45 capital ultimate density curve, the gradation with superior middle particle size, the micro bow type that is below the ultimate density curve.
- pavement engineering /
- asphalt mixture /
- aggregate segregation /
- gradation adjustment

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图 1 试验技术路线

Figure 1. Test procedure

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图 2 级配变化显著性

Figure 2. Marked difference of each gradation

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表 1 级配筛分结果

Table 1. Screening result of gradations

级配编号	筛孔尺寸/mm	31.5	26.5	19	16	13.2	9.5	4.75	2.36	1.18	0.6	0.3	0.15	0.075
0^#	质量通过百分率/%	100	99.2	86.8	80.7	72.2	59.5	34.5	22.4	17.7	11.5	7.3	4.7	3.8
1^#		100	98.7	79.6	72.1	64.5	53.8	36.1	20.7	16.4	10.8	7.0	4.6	3.7
2^#		100	98.6	78.8	70.3	61.4	50.0	44.4	27.1	21.2	13.4	8.2	4.9	3.8
3^#		100	99.2	87.7	82.1	74.9	64.2	43.8	29.7	23.2	14.5	8.7	5.0	3.9
4^#		100	98.5	77.2	68.8	60.6	49.3	36.2	26.8	21.1	13.4	8.2	4.9	3.8
5^#		100	98.5	77.2	68.8	60.5	49.0	33.5	22.4	17.7	11.5	7.3	4.7	3.8
6^#		100	99.4	90.0	83.5	72.6	56.4	29.4	19.6	15.7	10.4	6.8	4.6	3.7
规范上限		100	100.0	90.0	83.0	76.0	65.0	52.0	42.0	33.0	24.0	17.0	13.0	7.0
规范下限		100	90.0	75.0	65.0	57.0	45.0	24.0	16.0	12.0	8.0	5.0	4.0	3.0

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表 2 油石比

Table 2. Bitumen aggregate ratios

级配编号	0^#	1^#	2^#	3^#	4^#	5^#	6^#
沥青膜厚度/μm	10.47	10.47	10.47	10.47	10.47	10.47	10.47
比表面积/(kg·m^-2)	3.62	3.53	3.91	4.06	3.87	3.61	3.45
油石比/%	3.90	3.80	4.22	4.37	4.17	3.89	3.71

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表 3 级配分析结果

Table 3. Analysis result of different gradations

筛孔/mm		26.5	19	16	13.2	9.5	4.75	2.36	1.18	0.6	0.3	0.15	0.075
级配编号	点位	质量通过百分率差值/%
0^#	a	-0.8	-1.1	0.2	0.5	-0.6	0.6	1.4	1.2	0.7	-0.3	0.2	0.8
	b	-0.8	0.9	1.7	0.6	1.5	3.7	2.8	2.2	1.3	0.1	0.1	0.5
	c	3.9	7.3	11.1	12.8	13.7	9.0	5.1	3.7	2.2	0.9	0.8	1.1
1^#	a	-1.5	-4.4	-3.3	-1.7	-2.0	0.4	-0.3	-1.2	-0.6	-1.0	-0.4	0.6
	b	0.7	-5.5	-4.9	-2.6	-0.2	3.1	1.8	0.8	-0.3	-1.1	-1.0	0.0
	c	1.7	-5.8	-4.9	0.3	3.1	3.4	1.6	-0.3	-1.7	-2.2	-1.6	-0.4
2^#	a	-1.4	-11.6	-12.5	-12.3	-12.0	2.9	0.7	1.4	0.5	-0.9	-1.3	-0.7
	b	5.1	-1.3	1.6	-1.4	-0.6	10.6	3.7	2.7	1.1	-0.3	-0.6	0.2
	c	0.7	-6.6	-2.1	1.7	-5.9	6.5	1.9	1.8	1.1	0.3	0.1	1.3
3^#	a	-0.8	3.0	2.9	2.2	4.1	0.5	-1.7	-0.1	0.3	0.2	-0.5	0.0
	b	-0.8	2.7	6.1	4.9	4.1	1.4	-0.6	-0.1	-0.2	-0.1	-0.3	-0.1
	c	-0.8	3.5	5.8	8.8	9.5	3.5	2.0	3.6	0.2	-0.2	-0.6	0.2
4^#	a	-1.3	-10.0	-8.8	-6.6	-2.1	4.2	-0.7	-0.3	0.2	-0.3	-0.1	0.4
	b	-1.3	-7.2	-0.4	-1.1	0.4	4.9	-0.2	-0.2	-0.2	-0.6	-0.7	-0.1
	c	5.8	-0.3	-2.1	-4.6	0.4	4.3	-0.1	0.3	0.3	-0.3	-0.2	0.2
5^#	a	-1.5	-6.4	-6.2	-5.3	-3.3	-2.0	-1.6	-1.5	-1.9	-2.2	-1.8	-0.8
	b	0.9	-4.1	-2.1	1.7	5.2	5.9	2.4	1.7	0.6	-0.3	-0.4	0.4
	c	2.4	-3.1	-2.9	0.4	3.4	3.7	1.5	0.5	-0.4	-0.9	-1.0	0.0
6^#	a	-0.6	-5.9	-5.1	-3.7	0.8	2.0	2.5	2.3	1.6	0.6	0.1	0.4
	b	-0.6	4.8	5.9	4.5	5.0	4.1	2.8	2.2	1.5	0.3	-0.1	0.1
	c	-0.6	-1.2	2.8	1.3	2.9	4.1	3.2	2.5	1.9	0.7	0.3	0.5

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表 4 现场测试结果

Table 4. Test result in field

级配编号	试验项目	构造深度(铺砂直径/cm)			级配编号	试验项目	构造深度(铺砂直径/cm)
级配编号	桩号	点位a	点位b	点位c	级配编号	桩号	点位a	点位b	点位c
0^#	K16+827	20.95	20.55	16.65	3^#	K18+592	27.75	28.50	23.25
	837	21.25	19.90	16.35	3^#	602	28.20	27.75	23.25
	847	23.00	21.25	18.75	4^#	K19+100	25.36	24.90	19.70
	857	22.40	20.20	17.25		120	26.35	25.40	18.65
1^#	K17+580	20.35	21.45	17.25		140	24.80	25.80	18.85
	600	20.10	20.20	16.65		160	25.10	25.10	19.20
	620	19.25	20.00	17.60	5^#	K20+500	18.40	16.75	17.75
	640	19.30	20.30	18.15		510	18.20	17.59	16.00
2^#	K17+730	20.80	21.85	16.00		520	18.10	17.90	17.70
	750	24.10	24.80	15.80		530	16.55	16.95	16.25
	770	24.50	25.30	21.10	6^#	K21+300	18.15	18.50	16.25
	790	25.30	25.65	21.10		320	17.25	17.90	16.75
3^#	K18+572	27.60	27.50	22.25		340	16.75	17.75	14.75
3^#	582	27.85	26.85	21.55		360	16.75	17.50	14.25

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表 5 横向方差分析结果

Table 5. Analysis result of transverse variances

级配编号	$\bar{x}_{i}$			$\bar{x}$	极差	M
0^#	20.90	20.48	17.25	19.54	3.65	15.95
1^#	19.75	20.49	17.41	19.22	2.34	10.34
2^#	23.70	24.40	18.50	22.20	5.20	41.56
3^#	27.85	27.65	22.58	26.03	5.27	35.68
4^#	25.40	25.30	19.10	23.27	6.30	52.09
5^#	17.82	17.29	16.92	17.34	0.90	0.82
6^#	17.23	17.91	15.56	16.90	1.67	5.85

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参考文献(10)

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