温拌沥青混合料的压实特性与难易系数

延西利; 陈四来; 安舒文; 李昂; 张青

温拌沥青混合料的压实特性与难易系数

延西利^{1, 2,},
陈四来³,
安舒文¹,
李昂¹,
张青¹

1.
长安大学公路学院, 陕西西安 710064
2.
国立公共工程学院土工材料实验室, 罗纳里昂 69120
3.
四川俄岗公路工程建设有限责任公司, 四川成都 610041

基金项目:

四川省交通科技项目 2011A7-4-1

四川省交通科技项目 2012B1-1

国家自然科学基金项目 51308064

详细信息

作者简介:
延西利(1963-), 男, 陕西绥德人, 长安大学教授, 工学博士, 从事路面材料研究

中图分类号: U414.1
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- 被引次数: 0
出版历程
- 收稿日期: 2016-11-15
- 刊出日期: 2017-02-25

Compaction characteristic and operability factor of warm bituminous mixture

1.
School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China
2.
Laboratoire des Géomatériaux, Ecole Nationale des Travaux Publics de l'Etat, Lyon 69120, Rhône, France
3.
Sichuan E-gang RoadEngineering Construction Co., Ltd., Chengdu 610041, Sichuan, China

More Information

Author Bio:
YANXi-li(1963-), male, professor, PhD, +86-29-82334434, xili.yan@chd.edu.cn

摘要

摘要: 为了研究温拌沥青混合料的压实性能及其可压实的难易程度, 选用3种同品牌温拌沥青(ACMP1、ACMP2与ACMP3) 和2种热拌沥青(70^#基质沥青与SBS改性沥青), 制备了AC-13C型沥青混合料, 采用马歇尔击实试验, 变化不同的击实次数和击实温度, 测试了马歇尔试件的压实度和稳定度, 分析了其变化规律, 建立了压实度与击实次数的指数回归关系, 引入了压实成长曲率因子, 定义了压实难易系数。试验结果表明: 沥青混合料的压实度随着击实次数的增加而呈指数增长, 初期增长较快, 后期较慢, 且最终趋于稳定; 在击实温度为90℃¹50℃的范围内, 压实度随着击实温度的升高呈线性增长; 马歇尔稳定度随压实度增大呈线性增长变化, 符合传统研究结果; 温拌沥青混合料的压实难易系数比热拌沥青混合料降低了13.5%~18.5%, 具有较小的压实难易系数, 更容易压实。
- 路面材料 /
- 沥青混合料 /
- 压实度 /
- 击实温度 /
- 击实次数 /
- 难易系数
Abstract: To study the compaction characteristics and compaction operability of warm bituminous mixture, AC-13 C mixtures were made based on 3types of warm mix bitumens with the same brand (ACMP1, ACMP2 and ACMP3) and 2kinds of hot mix bitumens (70 ^# base bitumen and SBS modified bitumen).The compactness and stability of each Marshall specimen were measured by Marshall compaction test, their change rules were analyzed in different initial compaction temperatures and times, and the exponential regression relationship between compactness and compaction times was proposed.The curvature factor on compaction growing was applied and the operability factor was defined to evaluate the compaction workability.Test result shows that the compactness of bituminous mixture increases exponentially with the increase of compaction times, increases faster in the early stage, slows in the late stage, and stabilizes finally.The compactness increases linearly with the increase of initial compaction temperature within 90 ℃-150 ℃.Marshall stability increases linearly with the increase of compactness in accordance with traditional research results.The operability factor of warm bituminous mixture decreases by13.5%-18.5% compared with hot bituminous mixture, so it is easier to be compacted.
- pavement material /
- bituminous mixture /
- compactness /
- compaction temperature /
- compaction times /
- operability factor

HTML全文

图 1 沥青混合料的三相体系

Figure 1. Three-phase system of bituminous mixture

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图 2 沥青针入度与温度的关系

Figure 2. Relationship between asphalt penetration and temperature

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图 3 压实度与击实温度的关系

Figure 3. Relationships between compactness and compaction temperature

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图 4 稳定度与击实温度的关系

Figure 4. Relationships between stability and compaction temperature

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图 5 稳定度与压实度的关系

Figure 5. Relationships between stability and compactness

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图 6 压实度与击实次数的关系

Figure 6. Relationships between compactness and compaction times

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图 7 曲线的边界条件和几何特性

Figure 7. Limit conditions and geometric properties of curves

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表 1 ACMP沥青的基本组成与物理性状

Table 1. Basic compositions and physical properties of ACMP bitumens

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表 2 沥青的技术性能指标

Table 2. Technical feature indexes of bitumens

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表 3 矿料级配组成与密度

Table 3. Gradation compositions and densities of mineral aggregates

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表 4 沥青混合料的真密度

Table 4. Real densities of bituminous mixtures

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表 5 变击实次数时沥青混合料的试验温度

Table 5. Test temperatures of bituminous mixtures under changing compaction times

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表 6 不同击实温度下的压实度和稳定度

Table 6. Compactness and stability under different compaction temperatures

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表 7 不同击实次数下的压实度计算值

Table 7. Computational values of compactness under different compaction times

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表 8 数值回归结果

Table 8. Result of numerical regression

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表 9 难易系数的计算结果

Table 9. Calculational result of operability factor

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