多温度条件沥青混合料水稳定性评价指标阈值

doi:10.13229/j.cnki.jdxbgxb.20221179

Abstract

Abstract:

To prevent and reduce the moisture damage of asphalt pavement， based on the surface energy theory and the monthly average temperature of major cities in six regions of China， two evaluation methods， including surface energy test and macroscopic moisture stability test， were combined to accurately evaluate the water stability of asphalt mixture under multi-temperature conditions. First， the surface energy of raw materials was tested in the temperature range of -20 to 50 ℃ to determine the value of adhesive evaluation index ER（Energy Ratio） at various temperatures. Four types of asphalt mixtures were selected for five freeze-thaw cycles splitting tests at -20 ℃， immersion Marshall tests at 10 ℃ and 30 ℃， and immersion Hamburg rut tests at 50 ℃. According to the test indexes determined by the above three macroscopic tests and their corresponding technical requirements， the threshold values of ER corresponding to each temperature were determined. The experimental results show that the threshold values of ER of the asphalt mixture without modifiers at -20， 10， 30， 50 ℃ are 0.992， 1.693， 0.994 and 0.512， respectively. The threshold values of ER of modified asphalt mixture are 1.562， 1.944， 1.144 and 0.512， respectively. Furthermore， based on the threshold values of asphalt mixture water stability evaluation index under multi-temperature conditions， the relationship model between threshold value of asphalt mixture without modifiers and temperature was established as y=-0.000 6x²+0.009 7x+1.472 6， and the relationship model between threshold value of modified asphalt mixture and temperature is y=-0.000 6x²+0.000 4x+1.834 1， in which the x indicates temperature and y indicates the corresponding threshold value.

Key words: asphalt mixture, water stability, surface energy, threshold, temperature

CLC Number:

U416.217

Rong LUO,Yu LIANG,Long-chang NIU,Ting-ting HUANG,Qiang MIAO. Threshold value of water stability evaluation index of asphalt mixture under multi-temperature conditions[J].Journal of Jilin University(Engineering and Technology Edition), 2024, 54(7): 1966-1977.

Figures/Tables 18

Fig.1

Fig.2

Fig.3

Table 1

Density and surface energy parameters of chemical reagents"

试剂名称	密度/ （g·cm^-3）	表面能参数/（mJ·m^-2）
试剂名称	密度/ （g·cm^-3）	$γ R L W$	$γ R A B$	$γ R +$	$γ R -$	$γ R$
蒸馏水	1.000	21.800	51.000	25.500	25.500	72.800
甲酰胺	1.134	39.000	19.000	2.280	39.600	58.000
乙二醇	1.113	29.000	19.000	3.000	30.100	48.000
丙三醇	1.261	34.000	30.000	3.920	57.400	64.000
甲苯	0.867	28.300	0.000	0.000	2.700	28.300
2-戊酮	0.809	21.700	0.000	0.000	19.200	21.700

Table 1

Table 2

Surface energy parameters of reagents at different temperatures"

试剂名称	测试温度/℃	表面能参数/（mJ·m^-2）
试剂名称	测试温度/℃	$γ R L W$	$γ R A B$	$γ R +$	$γ R -$	$γ R$
蒸馏水	10	22.219	51.981	25.990	25.990	74.200
	30	21.362	49.708	24.989	24.989	71.340
	40	20.955	49.022	24.511	24.511	69.977
	50	20.673	48.362	24.181	24.181	68.905
甲酰胺	10	39.686	19.334	2.320	40.296	59.020
	30	38.563	18.787	2.254	39.156	57.350
	40	37.820	18.425	2.211	38.402	56.245
	50	37.238	18.142	2.177	37.811	55.380
乙二醇	10	29.592	19.388	3.061	30.715	48.980
	30	28.601	18.739	2.959	29.686	47.340
	40	27.749	18.180	2.871	28.801	45.929
	50	27.084	17.745	2.802	28.112	44.829
丙三醇	10	34.611	30.539	3.990	58.431	65.150
	30	33.586	29.634	3.872	56.700	63.220
	40	33.028	29.142	3.808	55.759	62.170
	50	32.367	28.560	3.732	54.644	60.927
甲苯	10	28.630	0.000	0.000	2.731	28.630
	30	27.350	0.110	0.000	2.609	27.460
	40	26.895	0.000	0.000	2.566	26.895
	50	26.300	0.000	0.000	2.509	26.300
2-戊酮	10	22.620	0.000	0.000	20.014	22.620
	30	21.160	0.000	0.000	18.722	21.160
	40	20.455	0.000	0.000	18.098	20.455
	50	19.730	0.000	0.000	17.457	19.730

Table 2

Table 3

Surface energy parameters of aggregates at different temperatures"

沥青种类	温度/℃	表面能参数/（mJ·m^-2）
沥青种类	温度/℃	$γ R L W$	$γ R A B$	$γ R +$	$γ R -$	$γ R$
70#基质沥青	-20	7.055	0.000	0.000	0.010	7.055
	10	19.980	3.462	0.738	4.062	23.443
	20	17.667	1.806	0.275	2.967	19.473
	30	14.985	1.076	0.102	2.840	16.061
	40	11.936	0.000	0.000	1.209	11.936
	50	9.074	0.000	0.000	0.010	9.074
SBS改性沥青	-20	10.138	0.000	0.000	0.010	10.138
	10	19.052	4.043	1.010	4.046	23.095
	20	18.380	1.723	0.355	2.090	20.103
	30	16.558	0.929	0.150	1.438	17.487
	40	14.506	0.000	0.000	0.120	14.506
	50	12.020	0.000	0.040	0.000	12.020

Table 3

Fig.4

Table 4

Surface energy parameters of aggregates at different temperatures"

集料种类	温度/℃	表面能参数/（mJ·m^-2）
集料种类	温度/℃	$γ R L W$	$γ R A B$	$γ R +$	$γ R -$	$γ R$
石灰岩	-20	100.867	54.379	11.835	62.462	155.246
	10	78.251	1.125	0.002	194.086	79.376
	20	102.482	3.657	0.016	208.990	106.139
	30	103.609	17.247	0.293	253.841	120.856
	40	196.000	136.845	17.278	270.960	332.845
	50	220.060	149.587	19.904	281.054	369.647
花岗岩	-20	73.803	108.259	16.453	178.078	182.062
	10	59.695	10.572	0.141	198.183	70.267
	20	75.451	3.077	0.010	236.740	78.528
	30	81.164	27.891	0.733	265.308	109.055
	40	106.941	107.027	9.370	305.626	213.968
	50	134.927	143.918	13.919	372.018	278.845

Table 4

Fig.5

Fig.6

Fig.7

Table 5

Table 6

Table 7

Fig.8

Fig.9

Fig.10

Fig.11

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沥青混合料类型	宏观指标/%	指标ER
石灰岩与SBS改性沥青	87.24	2.222
石灰岩与70#基质沥青	76.97	1.554
花岗岩与SBS改性沥青	76.04	0.666
花岗岩与70#基质沥青	68.44	0.517

对应温度/℃	沥青混合料类型	宏观指标/%	指标ER
10	石灰岩与SBS 改性沥青	94.21	2.397
	石灰岩与70# 基质沥青	90.69	2.257
	花岗岩与SBS 改性沥青	88.38	2.093
	花岗岩与70# 基质沥青	85.08	1.955
30	石灰岩与SBS 改性沥青	90.15	1.320
	石灰岩与70# 基质沥青	83.40	1.119
	花岗岩与SBS 改性沥青	86.93	1.135
	花岗岩与70# 基质沥青	78.75	0.979

沥青混合料类型	车辙深度/mm	指标ER
石灰岩与SBS改性沥青	3.10	0.846
石灰岩与70#基质沥青	7.97	0.628
花岗岩与SBS改性沥青	5.15	0.634
花岗岩与70#基质沥青	11.84	0.467

Threshold value of water stability evaluation index of asphalt mixture under multi-temperature conditions

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