中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊
Journal of Chongqing Jiaotong University(Natural Science)

Journal of Chongqing Jiaotong University(Natural Science) ›› 2024, Vol. 43 ›› Issue (10): 19-27.DOI: 10.3969/j.issn.1674-0696.2024.10.03

• Transportation Infrastructure Engineering • Previous Articles    

Penetration Behavior of Snow-Melting Agent Ions in Asphalt

ZHANG Qian1,2, WANG Pengtao1,2，CHANG Kailang1,2,3, FENG Wei4，PEI Xiaomei4   

  1. (1. School of Civil Engineering, Xian University of Architecture & Technology, Xian 710055, Shaanxi, China; 2. Shaanxi Key Lab of Geotechnical and Underground Space Engineering, Xian University of Architecture & Technology, Xian 710055, Shaanxi , China; 3. Xian Xinlong Enterprise Holding Co., Ltd., Xian 710065, Shaanxi, China; 4. Xian Highway Bureau, Xian 710003, Shaanxi, China)
  • Received:2023-12-16 Revised:2024-04-07 Published:2024-10-28

融雪剂离子在沥青中的渗透行为分析

张倩1,2，王鹏淘1,2，常开朗1,2,3，冯伟4，裴晓梅4   

  1. （1 .西安建筑科技大学 土木工程学院，陕西 西安 710055；2. 西安建筑科技大学 陕西省岩土与地下空间工程重点实验室， 陕西 西安 710055；3. 西安鑫龙企业控股有限公司，陕西 西安 710065；4. 西安市公路局，陕西 西安 710003）
  • 作者简介:张倩（1971—），女，陕西泾阳人，副教授，博士，主要从事道路材料方面的研究。E-mail：zhangqdq@xauat.edu.cn 通信作者：王鹏淘（1998—），男，山西忻州人，硕士，主要从事道路材料方面的研究。E-mail：wpt980604@163.com
  • 基金资助:
    陕西省交通运输厅交通运输科研项目（23-25R）；陕西省交通运输厅交通科技项目（16-14K）；衢州市科技计划项目（2019K39）

Abstract: To study the permeation and diffusion behavior of snow-melting agent ions in asphalt, six kinds of snow-melting agents, including A3N (prepared from acetate, NaNO2 and urea), Ca (CH3COO)2, Mg(CH3COO)2, KCH3COO, NaCl, and NaNO2, were employed to conduct penetration experiments on asphalt. The influence of snow-melting agents on viscosity, plasticity and high-temperature stability of asphalt were investigated through changes of three major indicators. An ion chromatograph was used to detect changes of ion concentration in snow-melting agent solution and analyze the permeation and diffusion patterns of cation and anion of snow-melting agents. Based on the changes of the concentration of cations and anions of snow-melting agents during each soaking cycle, Fick's law was introduced to analyze the permeation and diffusion behavior of snow-melting agent ions in asphalt. The results show that the viscosity and plasticity of the base asphalt and SBS-modified asphalt increase after soaking with the snow-melting agent, and NaCl has the greatest impact on viscosity and plasticity. Acetate and A3N can reduce the high-temperature stability of asphalt, while NaNO2 and NaCl can improve the high-temperature stability of asphalt. The permeability of snow-melting agent ions in the base asphalt is stronger than that of the SBS-modified asphalt. The maximum diffusion intensities of cations and anions are K+ in KCH3COO and CH3COO- in Mg(CH3COO)2. After 5 cycles of permeation, the concentration of K+ in the snow-melting agent solution above the base asphalt and SBS-modified asphalt is decreased by 27.59% and 16.89%, respectively, while the concentration of CH3COO- is decreased by 35.16% and 19.38%, respectively. The Fick's law diffusion model can better describe the changes in the adsorption capacity of various ions by asphalt, among which the non-linear fitting goodness of cation adsorption capacity is higher than that of anion, making it easier to be quantified and analyzed.

Key words: highway engineering；ionic permeation behavior；Ficks law；snow melting agent

摘要： 为研究融雪剂离子在沥青中的渗透扩散行为，采用A3N（由醋酸盐、NaNO2和尿素配制而成）、Ca(CH3COO)2、Mg(CH3COO)2、KCH3COO、NaCl和NaNO2共6种融雪剂对沥青进行渗透实验，通过三大指标的变化分析融雪剂对沥青稠度、塑性和高温稳定性的影响。利用离子色谱仪检测融雪剂溶液中离子浓度的变化，分析融雪剂阳、阴离子的渗透扩散规律。基于各浸泡周期融雪剂阳、阴离子浓度的变化，运用Fick定律分析各融雪剂离子在沥青中的渗透扩散行为。结果表明：经融雪剂浸泡后，基质沥青和SBS改性沥青的稠度和塑性增大，且NaCl对稠度和塑性的影响最大，而醋酸盐和A3N使沥青的高温稳定性降低，NaNO2和NaCl会提高沥青的高温稳定性；融雪剂离子在基质沥青中的渗透性强于SBS改性沥青，阳、阴离子扩散强度最大分别为KCH3COO中的K+和Mg(CH3COO)2中CH3COO-，经过5周期的渗透，基质沥青和SBS改性沥青上方融雪剂溶液中K+浓度降幅分别为27.59%和16.89%，CH3COO-的浓度降幅分别为35.16%和19.38%；Fick定律扩散模型可较好描述沥青对各离子吸附量的变化，其中阳离子吸附量的非线性拟合优度高于阴离子，更易被量化分析。

关键词: 道路工程；离子渗透行为；Fick定律；融雪剂

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