花岗岩沥青混合料路用性能

彭余华; 刘惠兴

doi:10.19818/j.cnki.1671-1637.2010.02.002

花岗岩沥青混合料路用性能

doi: 10.19818/j.cnki.1671-1637.2010.02.002

彭余华^1,,
刘惠兴²

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.
云南省公路工程监理咨询公司, 云南昆明 650021

基金项目:

国家西部交通建设科技项目 200631881221

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, 从事路面工程研究

中图分类号: U414.75
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出版历程
- 收稿日期: 2009-11-21
- 刊出日期: 2010-04-25

Road performance of granite asphalt mixture

PENG Yu-hua^1
,,
LIU Hui-xing²

1.
Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China
2.
Yunnan Highway Engineering Supervision and Consultancy Company, Kunming 650021, Yunnan, China

More Information

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

Article Text (Baidu Translation)

摘要

摘要: 采用延长时间的水煮法研究了4种抗剥落剂对改善沥青与花岗岩集料的粘附性能优劣。以花岗岩沥青混合料表面层为研究对象, 基于路面水损害目标设计了较小空隙率的花岗岩沥青混合料, 进行了掺加美氏、PA^-1和不掺加抗剥落剂3种情况下的马歇尔试验、车辙试验、水稳性试验、加速老化试验、浸水肯塔堡飞散试验等。试验结果表明: 相对于不掺加的状况, 掺加美氏抗剥落剂后, 花岗岩沥青混合料的稳定度提高39.8%, 动稳定度提高42.1%, 残留稳定度提高13%, 冻融劈裂比提高16%, 飞散损失降低4.4%;掺加PA^-1抗剥落剂后, 花岗岩沥青混合料的稳定度提高14%, 动稳定度提高22.9%, 残留稳定度提高8%, 冻融劈裂比提高12%, 飞散损失降低2.9%;掺加这2种抗剥落剂的沥青混合料加速老化试验后的技术指标均满足规范要求。可见, 掺加受热稳定性良好的抗剥落剂是提高花岗岩路用性能的重要保证, 且美氏抗剥落剂改善效果优于PA^-1。但仅通过2%水泥替换矿粉方法难以全面满足花岗岩沥青混合料路用性能要求。
- 路面材料 /
- 花岗岩沥青混合料 /
- 路用性能 /
- 抗剥落剂
Abstract: The adhesion between granite aggregate and asphalt was evaluated by extending the boiling time and adding several kinds of anti-stripping agents. Taking the surface layer of granite asphalt mixture as the research objective, minor void volume was designed based on the target of water damage, and some tests including Marshall stability test, wheel rutting test, water stability test, accelerating aging test and Cantabro test were conducted under the conditions of adding MeadWestvaco, PA^-1 and no adding anti-stripping agent. Test result shows that contrasted with no adding anti-stripping agent, granite asphalt mixture's stability, dynamic stability, residue stability and freeze-thaw splitting rate increase by 39.8%, 42.1%, 13% and 16% respectively, and its flying shards loss decrease by 4.4% in the condition of adding MeadWestvaco.While granite asphalt mixture's stability, dynamic stability, residue stability and freeze-thaw splitting rate increase by 14%, 22.9%, 8% and 12% respectively, and its flying shard loss decrease by 2.9% when adding PA^-1. The technical indices of granite asphalt mixtures after accelerating aging test come up to the specifications when adding two kinds of anti-stripping agents.The study indicates that adding anti-stripping agent with good thermal stability is the key point to improve the road performance of the mixture, and the effect of MeadWestvaco is superior to that of PA^-1. The way that mineral powder is replaced by 2% cement cannot fully meet the performance need of granite asphalt mixture.
- pavement material /
- granite asphalt mixture /
- road performance /
- anti-stripping agent

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图 1 抗剥落剂对粘附性等级的贡献

Figure 1. Contribution of anti-stripping agents to adhesion degree

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图 2 老化后抗剥落剂对粘附性等级的贡献

Figure 2. Contribution of anti-stripping agents to adhesion degree after aging

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图 3 水稳性试验结果

Figure 3. Water stability test result

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图 4 老化前、后的水稳性试验结果比较

Figure 4. Comparison of water stability test results before and after aging

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表 1 沥青试验指标

Table 1. Test indexes of asphalt

25 ℃针入度/0.1 mm	针入度指数PI	软化点/℃	5 ℃延度/cm	RTFOT后
				质量变化/%	25 ℃针入度比/%	5 ℃延度/cm
49	0.4	79	32	0.23	80	15.7

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表 2 水泥试验指标

Table 2. Test indexes of cement

表观密度/(t·m^-3)	含水量/%	外观	亲水系数	加热安定性
3.108	0.1	无团粒结块	0.96	无变化

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表 3 AC-13C级配设计

Table 3. AC-13C gradation design

级配设计范围	通过方筛孔(mm)的质量百分率/%
级配设计范围	16	13.2	9.5	4.75	2.36	1.18	0.6	0.3	0.15	0.075
级配上限	100.0	100.0	85.0	68.0	50.0	38.0	28.0	20.0	15.0	8.0
级配下限	100.0	90.0	68.0	38.0	24.0	15.0	10.0	7.0	5.0	4.0
级配中值	100.0	95.0	76.5	53.0	37.0	26.5	19.0	13.5	10.0	6.0
设计级配	100.0	96.0	68.1	39.8	30.1	23.9	18.2	13.3	9.4	5.6
关键性筛孔级配					< 40.0

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表 4 马歇尔试验结果

Table 4. Marshell test result

试验指标	空隙率/%	VMA/%	VFA/%	稳定度/kN	流值/mm
未掺加	4.4	14.4	69.5	16.02	2.8
掺加0.4%美氏	4.3	14.3	69.7	22.40	2.5
掺加0.4% PA-1	4.3	14.3	69.7	18.26	2.4

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表 5 车辙试验结果

Table 5. Wheel tracking test result

项目	未掺加	掺加0.4%美氏	掺加0.4%PA-1
动稳定度/(次·mm^-1)	5 204	7 394	6 398
增加幅度/%		42.1	22.9

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表 6 肯塔堡飞散试验结果

Table 6. Cantabro test result

指标	未掺加	掺加0.4%美氏	掺加0.4%PA-1
飞散损失/%	9.7	5.3	6.8

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表 7 抗滑及渗水试验结果

Table 7. Result of skid resistance and permeable performance test

摩擦系数BPN	构造深度/mm	渗水系数/(mL·min^-1)
60	0.57	36

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