[1]张吉哲,郭晨晨,苏春华,等.赤泥沥青混合料动态响应与水稳定性提升[J].长安大学学报(自然科学版),2021,41(5):11-22.
 ZHANG Ji zhe,GUO Chen chen,SU Chun hua,et al.Dynamic response and moisture stability improvement ofred mud asphalt mixture[J].Journal of Chang’an University (Natural Science Edition),2021,41(5):11-22.
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赤泥沥青混合料动态响应与水稳定性提升()
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长安大学学报(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
第41卷
期数:
2021年5期
页码:
11-22
栏目:
道路工程
出版日期:
2021-09-15

文章信息/Info

Title:
Dynamic response and moisture stability improvement ofred mud asphalt mixture
作者:
张吉哲郭晨晨苏春华梁明姚占勇
(1. 山东大学 齐鲁交通学院,山东 济南 250002; 2. 山东省交通科学研究院,山东 济南 250100)
Author(s):
ZHANG Jizhe1 GUO Chenchen1 SU Chunhua2 LIANG Ming1 YAO Zhanyong
(1. School of Qilu Transportation, Shandong University, Jinan 250002, Shandong, China;2. Shandong Transportation Research Institute, Jinan 250100, Shandong, China)
关键词:
道路工程赤泥沥青胶浆沥青混合料水损害耐久性
Keywords:
road engineering red mud asphalt mastic asphalt mixture moisture damage durabilit
文献标志码:
A
摘要:
针对赤泥沥青胶浆遇水界面剥离导致的沥青混合料水稳定性不足问题,选用消石灰、水泥对其进行增强改性,通过沥青质量检测仪(QCT)、界面拉拔仪(PosiTest ATA)、表面自由能测试仪、简单性能试验系统(SPT)与汉堡车辙仪(HWT),研究了原状赤泥以及改性赤泥对沥青胶浆流变学行为与界面黏附性的影响,通过表面自由能计算了沥青胶浆集料界面的黏附功与剥离功,揭示了赤泥沥青胶浆集料界面遇水后的强度失效机理,分析了赤泥沥青胶浆集料界面的热力学演变规律,评价了沥青混合料的动态响应、高温抗车辙性能与水稳定性。结果表明:赤泥可以提高沥青胶浆的刚度并改善沥青胶浆的弹性;单纯使用赤泥作为填料制备的沥青胶浆抗水损害能力较弱,而加入消石灰可以明显提高赤泥沥青胶浆的黏结强度,从而改善赤泥沥青胶浆与集料界面的水稳定性;沥青胶浆集料界面热力学黏附功与机械强度变化规律一致;赤泥替代石灰岩矿粉导致沥青混合料动态模量提高、相位角减小,加入消石灰进一步提高了沥青混合料的动态模量并降低相位角,但是水泥对赤泥沥青混合料的动态模量影响不大;赤泥可以提高沥青混合料干燥状态下的抗车辙能力,加入掺量(质量分数,下同)10%的消石灰进一步提高了沥青混合料的抗车辙能力;赤泥替代石灰岩矿粉严重影响了沥青混合料的抗水损害能力,通过消石灰物理改性可以提高赤泥沥青混合料的水稳定性。
Abstract:
Aiming at the problem of insufficient water stability of asphalt mixture caused by water interface stripping of red mud asphalt mortar, lime and cement were selected to enhance and modify it. The effects of original red mud and modified red mud on rheological behavior and interfacial adhesion of asphalt mortar were studied by asphalt quality tester (QCT), PosiTest ATA, surface free energy tester, simple performance test system (SPT) and Hamburg rut tester (HWT). Based on the surface free energy, the adhesion and stripping energy of asphalt masticsaggregate interface were calculated. The thermodynamic evolution law of asphalt masticsaggregate interface was analyzed. The strength failure mechanism of asphalt masticsaggregate interface in red mud was revealed. And the dynamic response, high temperature rutting resistance and water stability of asphalt mixture were evaluated. The results show that red mud can improve the stiffness and elasticity of asphalt mastics. The asphalt mortar prepared by using red mud as filler alone has weak moisture damage resistance, while adding hydrated lime can obviously improve the bonding strength of red mud asphalt mastic, then improve the moisture stability of asphalt mastic. The thermodynamic adhesion of asphalt mastics to aggregate interface is consistent with the change of mechanical strength. The substitution of red mud for limestone powder resulted in the increase of dynamic modulus of asphalt mixture and the decrease of phase angle. The addition of hydrated lime further increases the dynamic modulus of asphalt mixture and reduces the phase angle. However, cement has limited influence on the dynamic modulus of red mud asphalt mixture. Red mud can improve the rutting resistance of asphalt mixture under dry condition, while adding content (mass fraction, the same below) 10% hydrated lime can further improve the rutting resistance of asphalt mixture. The substitution of red mud for limestone powder seriously affects the water damage resistance of asphalt mixture. The water damage resistance of red mud asphalt mixture can be improved by physical modification of red mud by hydrated lime. 10 tabs, 8 figs, 31 refs.

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更新日期/Last Update: 2021-09-30