再生剂对旧沥青的再生行为

周志刚; 杨银培; 张清平; 高及阳

doi:10.19818/j.cnki.1671-1637.2011.06.002

再生剂对旧沥青的再生行为

doi: 10.19818/j.cnki.1671-1637.2011.06.002

长沙理工大学道路结构与材料交通行业重点实验室, 湖南长沙 410004

基金项目:

国家自然科学基金项目 51178065

国家自然科学基金项目 50778027

海南省交通运输厅科技计划项目琼交科教[2008]295号

详细信息

作者简介:
周志刚(1966-), 男, 湖南长沙人, 长沙理工大学教授, 工学博士, 从事路基路面工程研究

中图分类号: U414.75
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出版历程
- 收稿日期: 2011-07-16
- 刊出日期: 2011-12-25

Recycling behavior of recycling agent on aged asphalt

Key Laboratory of Road Structure and Material of Ministry of Transport, Changsha University of Science and Technology, Changsha 410004, Hunan, China

More Information

Author Bio:
ZHOU Zhi-gang (1966-), male, professor, PhD, +86-731-85258256, zzgcs@yahoo.com.cn

摘要

摘要: 研究了再生剂对旧沥青的作用机理及对再生沥青性能指标的影响, 通过傅立叶红外光谱试验及再生沥青的组分试验, 分析了再生剂在旧沥青中所起作用, 提出再生沥青组分含量随再生剂掺量的非线性关系模型。根据不同再生剂掺量的再生沥青的布氏粘度、针入度、动态剪切流变试验结果, 分析再生剂对旧沥青性能的改善效应, 总结了再生剂掺量与各指标间的关系。试验结果表明: 再生剂与旧沥青未发生化学反应, 再生沥青组分含量与再生剂掺量的非线性关系模型相关系数在0.98以上; 随再生剂掺量的增加, 粘度敏感性降低, 针入度敏感性增强; 复数模量与抗车辙因子的对数值均与再生剂的掺量呈良好的直线递减关系; 再生剂的掺量应结合再生沥青混合料性能试验来确定。
- 沥青路面 /
- 再生沥青 /
- 再生剂 /
- 傅立叶红外光谱试验 /
- 组分分析 /
- 动态剪切流变试验 /
- 流变性 /
- 路用性能
Abstract: The action mechanism of recycling agent on aged asphalt and the influence on the performance indicators of recycling asphalt were studied, Fourier transform infrared spectroscopy test and the component test of recycling asphalt were used to analyze the role of recycling agent on aged asphalt.The nonlinear relationship model of recycling asphalt component content and recycling agent mixing ratio was proposed.Depending on the experimental results of Brookfield viscosity, penetration and dynamic shear rheometer(DSR) for recycling asphalts with different recycling agent mixing ratios, the improvement of recycling agent on aged asphalt properties was analyzed, relationships among recycling agent mixing ratio and every index were summarized.Test result shows that there is no chemical reaction between recycling agent and aged asphalt, the interrelated coefficient of nonlinear relationship model for recycling asphalt component content and recycling agent mixing ratio is above 0.98.Viscosity sensitivity decreases, and penetration sensitivity increases with the increase of recycling agent mixing ratio.The logarithms of complex modulus and anti-rutting factor have good linear decreasing relationships with recycling agent mixing ratio, and the mixing ratio should be determined by recycling asphalt mixture performance test.
- asphalt pavement /
- recycling asphalt /
- recycling agent /
- FTIR test /
- component analysis /
- DSR test /
- rheological property /
- road performance

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图 1 红外光谱

Figure 1. Infrared spectroscopy

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图 2 再生沥青组分含量的实测与计算结果

Figure 2. Results of testing and calculation for recycling asphalt component content

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图 3 粘度与针入度随再生剂掺量的变化

Figure 3. Changes of viscosity and penetration with different mixing ratios of recycling agent

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图 4 再生沥青的粘度与针入度关系

Figure 4. Relationship between viscosity and penetration of recycling asphalt

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图 5 复数模量及抗车辙因子随再生剂掺量变化

Figure 5. Changes of complex modulus and anti-rutting factor with mixing ratios of recycling agent

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表 1 新旧沥青指标对比

Table 1. Index comparison of aged asphalt and new asphalt

检测项目	旧混合料中沥青含量/%	针入度(25 ℃, 100 g, 5 s)/0.1 mm	软化点(环球法)/℃	延度(15 ℃, 5 cm·min^-1)/cm	粘度(135 ℃)/(Pa·s)	组分含量/%
检测项目	旧混合料中沥青含量/%	针入度(25 ℃, 100 g, 5 s)/0.1 mm	软化点(环球法)/℃	延度(15 ℃, 5 cm·min^-1)/cm	粘度(135 ℃)/(Pa·s)	沥青质	饱和分	芳香分	胶质
新AH-70		63.0	47.4	143.0	0.285	12.12	20.66	35.91	31.31
旧沥青	4.86	9.2	75.9	6.7	1.950	20.93	16.87	22.13	40.07

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表 2 再生剂性质与要求

Table 2. Quality and requirement of recycling agent

检测项目	粘度(60 ℃)/(10^-3Pa·s)	闪点/℃	饱和分含量/%	芳香分含量/%	薄膜烘箱试验前后粘度比	薄膜烘箱试验前后质量变化/%	密度/(g·cm^-3)
A型再生剂	350.1	254	23.20	44.62	2.65	-3.31	1.013
规范要求^[7]	176~900	≥220	≤30	实测记录	≤3	≤4, ≥-4	实测记录

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表 3 再生沥青组分含量变化

Table 3. Change of recycling asphalt component content %

组分	再生剂组分含量	A型再生剂不同掺量时再生沥青组分含量
组分	再生剂组分含量	0.00	5.77	7.55	10.91	15.00	30.00	35.00	40.00
沥青质	7.97	20.93	20.17	19.95	18.10	17.74	16.61	16.16	15.86
饱和分	23.20	16.87	17.50	17.55	17.73	17.71	17.73	17.76	17.75
芳香分	44.62	22.13	23.72	24.50	26.39	27.71	29.78	31.93	32.57
胶质	24.21	40.07	38.61	38.00	37.78	36.84	35.88	34.15	33.82

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表 4 再生沥青组分含量与再生剂掺量关系

Table 4. Relationship between recycling asphalt component content and recycling agent mixing ratio

组分	拟合公式	均方差	残差平方和	相关系数	决定系数	15.00%掺量验算
组分	拟合公式	均方差	残差平方和	相关系数	决定系数	计算值/%	与实测值误差/%	规范精度误差要求/%
沥青质	$y=\frac{2093+18.18 x}{100+1.964 x}$	0.388 9	1.059 2	0.980 3	0.960 1	18.27	0.53	<1.6
饱和分	$y=\frac{1687+685.86 x}{100+38.479 x}$	0.038 3	0.010 2	0.991 6	0.983 3	17.68	0.03	<1.2
芳香分	$y=\frac{2213+57.03 x}{100+0.956 x}$	0.437 7	1.341 1	0.993 5	0.987 1	26.84	0.87	<1.6
胶质	$y=\frac{4007+43.46 x}{100+1.718 x}$	0.386 8	1.047 1	0.984 4	0.968 3	37.04	0.20	<1.2

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表 5 再生沥青粘度与针入度的变化

Table 5. Changes of viscosity and penetration for recycling asphalt

再生剂掺量/%	0.00	5.77	7.55	10.91	15.00	30.00	35.00	40.00
粘度/(Pa·s)	1.950	1.820	1.630	1.490	1.370	0.740	0.550	0.425
针入度/0.1 mm	9.2	10.1	11.6	16.7	25.2	50.0	59.1	68.6

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表 6 再生沥青DSR试验结果

Table 6. Results of DSR test for recycling asphalt

再生剂掺量/%	温度/℃	δ/(°)	G^*/kPa	G^*cos(δ)/kPa	G^*sin(δ)/kPa	G^*/sin(δ)/kPa
0	70	81.7	24.89	3.611	24.627	25.156
	64	76.4	63.18	14.898	61.399	65.013
	58	70.4	153.62	51.623	144.687	163.104
	52	63.5	310.89	138.875	278.148	347.487
30	70	86.0	2.14	0.151	2.135	2.144
	64	85.5	6.55	0.519	6.529	6.571
	58	84.4	17.00	1.672	16.918	17.083
	52	82.2	45.40	6.194	44.975	45.829
35	70	86.8	1.01	0.057	1.008	1.012
	64	86.5	2.92	0.180	2.915	2.926
	58	85.5	7.70	0.610	7.676	7.724
	52	83.8	17.20	1.870	17.098	17.303
40	70	87.2	0.44	0.022	0.440	0.441
	64	87.0	1.88	0.100	1.877	1.883
	58	86.2	4.49	0.301	4.480	4.500
	52	84.4	9.20	0.905	9.155	9.245

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表 7 再生沥青混合料性能试验结果

Table 7. Results of recycling asphalt mixture performance test

方案		总含油量/%	动稳定度/(次·mm^-1)	马歇尔试验		低温弯曲破坏应变/10^-6	车辙试件渗水试验/(mL·min^-1)
方案		总含油量/%	动稳定度/(次·mm^-1)	浸水残留稳定度/%	冻融劈裂残留强度/%	低温弯曲破坏应变/10^-6	车辙试件渗水试验/(mL·min^-1)
1	旧料	4.86	5 903	77.3	84.2	1 441	2.7(原路面)
2	旧料+1.00%再生剂+5.3% AC-13新料	5.76	5 419	70.8	92.0	4 219
3	旧料+1.00%再生剂+17.6% AC-13新料	5.68	4 565	82.0	95.3	4 531	57.3
4	旧料+1.00%再生剂+33.3% AC-13新料	5.60	4 000	85.8	97.2	5 027
5	旧料+1.22%再生剂	6.01	3 032	93.9	88.0	4 380	53.3
6	规范要求^[14]		≥1 000	≥80	≥75	≥2 000	≤120
注: 表中添加的再生剂及新料的比例为与旧料的质量比, AC-13新料的油石比为5%。

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