Composition optimization of waste cooking oil recycled asphalt and performance research of its mixture

doi:10.19491/j.issn.1001-9278.2025.04.017

Abstract

Abstract:

To improve the pavement performance of recycled asphalt mixtures， the preparation schemes of recycled asphalt were designed by using a response surface method with the contents of waste cooking oil and styrene⁃butadiene⁃styrene （SBS）⁃modified asphalt， and the shear temperature as independent variables. The influence of these independent variables on the properties of regenerated asphalt were analyzed through basic physical and rheological measurements to determine the optimization scheme of recycled asphalt. On this basis， the pavement performance was verified. The results indicated that the optimal optimization scheme for recycled asphalt was determined to be a content of waste cooking oil of 8.4 wt%， a content of SBS⁃modified asphalt of 152 wt%， and a shear temperature of 166 ℃. The maximum error between the predicted values and actual results of performance indicators of recycled asphalt was 4.5 %， which was within the acceptable limits. With an increase in the content of the reclaimed asphalt pavement （RAP）， the cracking resistance and water stability of recycled asphalt mixtures decreased but their high⁃temperature stability was improved. Compared to the recycled asphalt mixtures without waste cooking oil， the recycled asphalt mixtures containing waste cooking oil showed a significant improvement in the low⁃temperature crack resistance and water stability.

Key words: road engineering, response surface method, recycled asphalt, waste cooking oil, pavement performance

CLC Number:

TQ325.2

LI Dongpo, HAN Hua, WANG Li, YANG Jian, ZHAO Dan, JING Hongjun, ZOU Xiaolong, ZHANG Yongfei. Composition optimization of waste cooking oil recycled asphalt and performance research of its mixture[J]. China Plastics, 2025, 39(4): 97-103.

Figures/Tables 11

References 22

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材料种类	技术指标		单位	实测值	规范要求
SBS改性沥青	25 ℃针入度		0.1 mm	72.1	60~80
	针入度指数		-	0.1	≥-0.4
	5 ℃延度		cm	37.9	≥30
	软化点		℃	61	≥55
	密度		g/cm³	1.034	实测值
	TFOT后残留物	质量损失	%	0.16	±1.0
		25 ℃针入度比	%	80	≥60
		5 ℃延度	cm	23.4	≥20
废食用油	密度		g/cm³	0.96	-
	酸值		mg	0.8	-
	闪点		℃	321	-
	含水量		%	0.3	-
老化沥青	25 ℃针入度		0.1 mm	50.9	-
	5 ℃延度		cm	1.3	-
	软化点		℃	67.5	-

材料种类	技术指标		单位	实测值	规范要求
SBS改性沥青	25 ℃针入度		0.1 mm	72.1	60~80
	针入度指数		-	0.1	≥-0.4
	5 ℃延度		cm	37.9	≥30
	软化点		℃	61	≥55
	密度		g/cm³	1.034	实测值
	TFOT后残留物	质量损失	%	0.16	±1.0
		25 ℃针入度比	%	80	≥60
		5 ℃延度	cm	23.4	≥20
废食用油	密度		g/cm³	0.96	-
	酸值		mg	0.8	-
	闪点		℃	321	-
	含水量		%	0.3	-
老化沥青	25 ℃针入度		0.1 mm	50.9	-
	5 ℃延度		cm	1.3	-
	软化点		℃	67.5	-

影响因素	编号	单位	水平
影响因素	编号	单位	-1	0	1
废食用油掺量	X₁	%	3	6	9
SBS改性沥青掺量	X₂	%	68	110	152
剪切温度	X₃	℃	155	165	175

影响因素	编号	单位	水平
影响因素	编号	单位	-1	0	1
废食用油掺量	X₁	%	3	6	9
SBS改性沥青掺量	X₂	%	68	110	152
剪切温度	X₃	℃	155	165	175

废食用油掺量/%	SBS改性沥青掺量/%	剪切温度/℃
6	68	155
6	110	165
9	110	155
6	68	175
3	110	175
9	68	165
3	110	155
3	152	165
6	110	165
6	152	155
9	152	165
6	110	165
6	110	165
9	110	175
6	110	165
3	68	165
6	152	175