Study on adhesion mechanism between iron tailings and asphalt modified with anti⁃stripping agents

doi:10.19491/j.issn.1001-9278.2025.09.014

Abstract

Abstract:

This study investigated the adhesion mechanism between iron tailings and asphalt modified with anti⁃stripping agents. Three commercial anti⁃stripping agents （XT⁃1， PA⁃1， and ZL⁃16） were incorporated into 70# base asphalt to prepare modified binders. The road performance of iron tailings asphalt mixtures was evaluated， while surface free energy analysis and Fourier⁃transform infrared spectroscopy were employed to characterize the interfacial adhesion properties. Results indicated that all anti⁃stripping agents significantly enhanced mixture performance， with PA⁃1⁃modified asphalt showing the most notable improvements： 14.3 % increase in residual stability， 17.7 % enhancement in freeze⁃thaw splitting strength ratio， and 61.4 % improvement in high⁃temperature stability compared to the control. The surface free energy and chemical bonding analysis revealed the underlying mechanisms for the improved interfacial adhesion between iron tailings and modified asphalt.

Key words: asphalt anti stripping agent, road performance, asphalt mixture, iron tailings, interface adhesion force

CLC Number:

TQ320

LYU Bingjin, YAN Feng, LI Junjie, BAO Lingchen, HUANG Kaiyong. Study on adhesion mechanism between iron tailings and asphalt modified with anti⁃stripping agents[J]. China Plastics, 2025, 39(9): 86-92.

Figures/Tables 11

技术指标	单位	数值	规范要求
针入度（25℃，5s，100g）	0.1 mm	65	60~80
软化点	℃	48.5	≥45
延度（10℃）	cm	23	≥20
延度（15℃）	cm	＞100	≥100
压碎值	%	14.5	≤28
磨耗值	%	13.7	≤30
针片状含量	≥9.5 mm	10.8	≤15
针片状含量	<9.5 mm	8.9	≤20
砂当量	%	72.4	≥65
亚甲蓝值	g/kg	2.3	≤2.5
棱角性（流动时间）	s	53.3	≥30
坚固性	%	9.7	≤12

Tab.1. Technical indicators of coarse aggregate

Fig.1. Gradation of AC⁃20

Fig 2. Adhesion between iron tailings and different asphalt in boiling water test

参数/ $m J · m - 2$	$γ$	$γ p$	$γ d$	与集料黏附功 $W a s$	与水黏附功 $W a (s) w$	剥落功 $W a w s$	ER
水	72.8	21.8	51.0	-	-	-	-
铁尾矿	37.852	25.427	12.425	-	97.433	-	-
70^#沥青	23.395	22.877	0.518	53.311	54.943	99.066	0.538
70^#沥青+XT	24.566	24.065	0.501	54.463	55.919	98.889	0.551
70^#沥青+PA	25.371	24.873	0.498	55.322	56.752	98.813	0.560
70^#沥青+ZL	24.404	23.889	0.515	54.351	55.891	98.973	0.549

参数/ $m J · m - 2$	$γ$	$γ p$	$γ d$	与集料黏附功 $W a s$	与水黏附功 $W a (s) w$	剥落功 $W a w s$	ER
水	72.8	21.8	51.0	-	-	-	-
铁尾矿	37.852	25.427	12.425	-	97.433	-	-
70^#沥青	23.395	22.877	0.518	53.311	54.943	99.066	0.538
70^#沥青+XT	24.566	24.065	0.501	54.463	55.919	98.889	0.551
70^#沥青+PA	25.371	24.873	0.498	55.322	56.752	98.813	0.560
70^#沥青+ZL	24.404	23.889	0.515	54.351	55.891	98.973	0.549

Tab.2. Calculation results of surface energy related parameters and indicators for asphalt， mineral aggregate and water

Fig.3. Infrared spectrum of asphalt

Fig.4. Surface morphology of iron tailings at different magnifications

Fig.5. Stability and RS value of asphalt mixture

Fig 6. Freeze thaw splitting strength values and freeze⁃thaw splitting strength ratios of different asphalt mixtures

Fig.7. Dynamic stability of asphalt mixture

Fig.8. Rutting depth of asphalt mixture

Fig.9. Mechanism diagram of asphalt anti stripping agent

References 28

[1]	Cao Liping. Utilization of iron tailings as aggregates in paving asphalt mixture： A sustainable and eco⁃friendly solution for mining waste［J］. Journal of Cleaner Production， 2022， 375： 134126.
[2]	Lv Xingdong， Lin Yuqiang， Xia Chen， et al. Environmental impact， durability performance， and interfacial transition zone of iron ore tailings utilized as dam concrete aggregates［J］. Journal of Cleaner Production， 2021， 292： 126068.
[3]	Chang Lu， Yang Huaming， Wang Jie， et al. Utilization of iron tailings to prepare high⁃surface area mesoporous silica materials［J］. Science of the Total Environment， 2020， 736： 139483.
[4]	尹琛，白丽梅，李绍英，等. 铁尾矿综合利用研究进展［J］. 矿产保护与利用， 2023， 43（06）： 41⁃53.
[5]	Mendes Beatryz C.， Pedroti Leonardo G.， Mauricio P.F. Fontes，et al. Technical and environmental assessment of the incorporation of iron ore tailings in construction clay bricks［J］. Construction and Building Materials， 2019， 227： 116669.
[6]	Cui Xiaowei， Yong Geng， Tao Li， et al. Field application and effect evaluation of different iron tailings soil utilization technologies［J］. Resources， Conservation and Recycling， 2021， 173： 105746.
[7]	Han Fanghui， Song Shaomin， Liu Juanhong， et al. Properties of steam⁃cured precast concrete containing iron tailing powder［J］. Powder Technology， 2019， 345： 292⁃299.
[8]	Yu Huanan， Ge Jinguo， Qian Guoping， et al. Evaluation of the interface adhesion mechanism between SBS asphalt and aggregates under UV aging through molecular dynamics［J］. Construction and Building Materials， 2023， 409： 133995.
[9]	田知文. 铁尾矿沥青混合料性能评价及改善措施研究［D］. 哈尔滨工业大学， 2018
[10]	余天航. 铁尾矿砂石骨料沥青混合料性能研究［D］. 河北工业大学， 2020
[11]	Zuo Gaohong， Du Yingchao， Wei Lianqi， et al. Efficient Demulsification of Acidic Oil⁃In⁃Water Emulsions with Silane⁃Coupled Modified TiO2 Pillared Montmorillonite［J］. Applied Sciences， 2019， 9： 1008.
[12]	Khoshnood Negin， Zamanian Ali， Massoudi Abouzar. Effect of silane⁃coupling modification on bioactivity and in vitro properties of anodized titania nanotube arrays［J］. Materials Letters， 2016， 185： 374⁃378.
[13]	Deng Jinhuan， Ning Xun⁃an， Qiu Guoqiang， et al. Optimizing iron separation and recycling from iron tailings： A synergistic approach combining reduction roasting and alkaline leaching［J］. Journal of Environmental Chemical Engineering， 2023， 11： 110266.
[14]	曹丽萍，张晓亢，杨晨，等. 基于分子动力学的硅烷偶联剂...铁尾矿沥青混合料改性的机理_曹丽萍［J］. 中南大学学报（自然科学版）， 2021， 52（07）： 2 276⁃2 286.
[15]	Xu Jia⁃yun， Ma Biao， Mao Wei⁃jie， et al. Review of interfacial adhesion between asphalt and aggregate based on molecular dynamics［J］. Construction and Building Materials， 2023， 362： 129642.
[16]	Cong Peiliang， Chen Zhihui， Ge Wanshuai. Influence of moisture on the migration of asphalt components and the adhesion between asphalt binder and aggregate［J］. Construction and Building Materials， 2023， 385： 131513.
[17]	Yan Gong， Jian Xu， Yan Er⁃hu. Intrinsic temperature and moisture sensitive adhesion characters of asphalt⁃aggregate interface based on molecular dynamics simulations［J］. Construction and Building Materials， 2021， 292： 123462.
[18]	公路工程沥青及沥青混合料试验规程JTG E 20⁃2011［J］.
[19]	Fowkes F M. Determination of Interfacial tensions，Contact angles， and Dispersion Forces in Surfaces by Assuming additivity of Intermolecular interactions in Surfaces［Z］. the journal of physical chemistry， 1962： 382.
[20]	Owens D K， Wendt R C. Estimation of the surface free energy of polymers［J］. Journal of Applied Polymer Science， 1969， 13： 1 741⁃1 747.
[21]	Ahmad Naveed. Asphalt Mixture Moisture Sensitivity Evaluation using Surface Energy Parameters［J］： 1⁃306.
[22]	王丽，王有涛，程和平. 铁尾矿沥青混凝土性能研究和红外光谱分析［J］. 矿产综合利用， 2024， 45（03）： 143⁃149.
[23]	申爱琴，王建文，郭寅川，等. 抗剥落剂对沥青老化性能影响研究［J］. 公路， 2019， 64（08）： 201⁃207.
[24]	Lu Ziyu， Chen Anqi， Wu Shaopeng， et al. Experimental Study on the Physicochemical Properties of Asphalt Modifed by Different Anti⁃Stripping Agents and Their Moisture Susceptibility with Aggregates［J］： 1⁃21.
[25]	武铁征. 集料骨架强度对沥青混合料路用性能的影响分析［J］. 公路与汽运， 2022，（03）： 45⁃47， 75.
[26]	孙瑜，李立寒. 基于表面能理论的沥青混合料抗剥落性能［J］. 建筑材料学报， 2016， 19（02）： 285⁃291.
[27]	赵胜前，丛卓红，游庆龙，等. 沥青⁃集料黏附和剥落研究进展［J］. 吉林大学学报（工学版）， 2023， 53（09）： 2 437⁃2 464.
[28]	Ji Jie， Hui Yao， Liu Luhou， et al. Adhesion Evaluation of Asphalt⁃Aggregate Interface Using Surface Free Energy Method［J］. Applied Sciences， 2017， 7： 156.