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聚氨酯混合物的力学性能及聚氨酯复合路面的荷载响应行为

Mechanical Properties of Polyurethane Mixture and Load Response Behaviour of Polyurethane Composite Pavement.

作者信息

Zhuang Wei, Bi Yufeng, Liu Baoju, Hou Derui, Jing Shuo, Lu Xiaojin, Sun Min

机构信息

School of Civil Engineering, Central South University, Changsha 410075, China.

Shandong Provincial Communications Planning and Design Institute Co., Ltd., Jinan 250031, China.

出版信息

Polymers (Basel). 2023 Jan 12;15(2):417. doi: 10.3390/polym15020417.

DOI:10.3390/polym15020417
PMID:36679296
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9862624/
Abstract

Finite element numerical simulation calculation of pavement structure load response is widely applied; however, there is still a lack of research on the polyurethane (PU) mixture composite pavement load response. The mechanical characteristics of PU mixture composite pavement are not well understood, and there is a lack of research on typical pavement structures of PU mixtures, which limits their application in pavement structures. Therefore, herein, the mechanical properties of PU mixtures are analysed using the dynamic modulus test, uniaxial penetration test, and fatigue test. Further, the finite element theory calculation method is used to realize the load response calculation of orthogonal design composite pavement structure. The results show that PU mixtures exhibit more obvious elastic characteristics and have good shear resistance, fatigue stability, and temperature stability, and can be used as shear and anti-fatigue layers. The structure of '4 cm SMA-13 + 5 cm PUM-20 + 6 cm PUM-25 + semi-rigid base' is recommended for the PU mixture composite structure. In comparison to typical asphalt pavement, the analysis shows that except for shear stress, temperature has little effect on the load response of PU composite pavement structures, while high temperatures lead to a significant increase in the load response of typical asphalt pavement structures. The PU composite pavement can bear greater loads and has a reduced thickness of its surface layer by about 3 cm in comparison to conventional pavement. The results of this study provide theoretical support for the design of PU mixture pavement structures and promote the popularization and application of PU mixture pavement.

摘要

路面结构荷载响应的有限元数值模拟计算得到了广泛应用；然而，对于聚氨酯（PU）混合料复合路面的荷载响应仍缺乏研究。PU混合料复合路面的力学特性尚未得到充分了解，且对PU混合料典型路面结构缺乏研究，这限制了它们在路面结构中的应用。因此，本文采用动态模量试验、单轴贯入试验和疲劳试验对PU混合料的力学性能进行了分析。此外，利用有限元理论计算方法实现了正交设计复合路面结构的荷载响应计算。结果表明，PU混合料表现出更明显的弹性特性，具有良好的抗剪性能、疲劳稳定性和温度稳定性，可作为抗剪和抗疲劳层使用。对于PU混合料复合结构，推荐采用“4 cm SMA - 13 + 5 cm PUM - 20 + 6 cm PUM - 25 + 半刚性基层”的结构。与典型沥青路面相比，分析表明，除剪应力外，温度对PU复合路面结构的荷载响应影响较小，而高温会导致典型沥青路面结构的荷载响应显著增加。PU复合路面能够承受更大的荷载，与传统路面相比，其表面层厚度可减少约3 cm。本研究结果为PU混合料路面结构设计提供了理论支持，促进了PU混合料路面的推广应用。

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本文引用的文献

1
Interlaminar Shear Characteristics of Typical Polyurethane Mixture Pavement.典型聚氨酯混合料路面的层间剪切特性
Polymers (Basel). 2022 Sep 13;14(18):3827. doi: 10.3390/polym14183827.
Materials (Basel). 2024 Jun 5;17(11):2759. doi: 10.3390/ma17112759.