基于时温等效的纳米碳粉改性沥青黏弹行为

doi:10.13229/j.cnki.jdxbgxb.20240127

Abstract

Abstract:

In order to understand the high and low temperature viscoelastic behavior of carbon nano powder modified asphalt， this paper will analyze the creep and relaxation behavior of carbon nano powder modified asphalt based on multi-temperature and multi-stress creep recovery test and low-temperature relaxation test， combined with the principle of time-temperature equivalence. Subsequently， the low-temperature relaxation behavior of carbon nano powder modified asphalt was inverted and verified by combining the Laplace convolution integral. The results show that the carbon nano powder modified asphalt has stronger elastic stability and lower stress sensitivity at low and medium temperatures. The short-term creep flexural volume is small， the long-term creep flexural volume grows significantly， and the stress relaxation effect is significant. The Pearson correlation between the inverse relaxation modulus method proposed in this paper and the modulus curve of low-temperature relaxation test is 0.911. This study will provide experimental and theoretical references for the application of carbon nano powder modified asphalt， and at the same time， provide an effective inverse relaxation behavior of low-temperature relaxation of carbon nano powder modified asphalt.

Key words: road engineering, carbon nano powder modified asphalt, viscoelastic behavior, time-temperature equivalence principle, Laplace convolution integral

CLC Number:

U416

Feng-chun GUO,Hai-peng BI,Hai-tao WANG,Shu-zheng WU,Hong-yu YANG. Viscoelastic behavior of carbon nano powder modified asphalt based on time-temperature equivalence[J].Journal of Jilin University(Engineering and Technology Edition), 2025, 55(1): 221-229.

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性能参数		单位	技术要求	检测指标	方法试验
针入度25 ℃， 100 g， 5 s		0.1 mm	80~100	88	GB/T 4509
延度15 ℃		cm	>100	>100	GB/T 4508
软化点		℃	42~55	45.0	GB/T 4507
闪点（开）		℃	≥230	256	GB/T 267
溶解度		%	≥99	99.60	GB/T 11148
蜡含量		%	≤3.0	2.2	SH/T 0425
密度25 ℃		kg/m³	-	1 005.4	GB/T 8928
163 ℃薄膜烘箱试验5 h	质量变化	%	≤1.0	-0.097	GB/T 5304
	针入度比25 ℃	%	≥50	70	GB/T 4509
	延度15 ℃	cm	≥40	69	GB/T 4508

化学成分	质量分数	化学成分	质量分数
C	≥99.9	Mn	0.002
Al	0.002	Na	0.002
Fe	0.001	Cu	0.003
Ca	0.002	Ni	0.002
Mo	0.001	Pb	0.002
Zr	0.001	Si	0.003

试验温度/℃					WLF方程参数
20	30	40	50	60	C₁	C₂	R²
0	14.186	19.587	21.509	21.904	-27.350	8.753	0.996 5

	i=1	i=2	i=3	i=4	i=5	i=6	i=7
J_i/kPa^-1	3.82×10^-3	2.09×10^-2	4.37×10^-2	5.56×10^-1	2.52	4 725.81	4 102.59
T_i/s	1.00×10¹	1.00×10⁵	1.00×10¹⁰	1.00×10¹⁵	1.00×10²⁰	1.00×10²⁵	1.00×10³⁰
J_e/kPa^-1	2.71×10^-2
∑J_i/kPa^-1	8 830.92
R²/	0.996 5

	i=1	i=2	i=3	i=4	i=5	i=6	i=7
E_i/kPa	9.75×10^-13	9.73×10^-13	9.71×10^-13	60.57	50.27	8.51	9.99×10^-13
T_i/s	1.00×10^-3	1.00×10^-2	1.00×10^-1	1	1.00×10¹	1.00×10²	1.00×10³
E_e/kPa	1.03
∑E_i/kPa	119.35
R²/	0.981 2

Viscoelastic behavior of carbon nano powder modified asphalt based on time-temperature equivalence

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