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A platform for research: civil engineering, architecture and urbanism
Method for evaluating crack resistance of graphene modified asphalt
The invention discloses a method for evaluating the crack resistance of graphene modified asphalt, and belongs to the technical field of mechanical property evaluation of modified asphalt. The method comprises the following steps: 1, dividing matrix asphalt into four components, and calculating the weight ratio of each component; 2, calculating to obtain the number of each component molecular model in the asphalt molecular model; 3, constructing a graphene modified asphalt blending system molecular model; 4, enabling each graphene modified asphalt blending system molecular model to reach a balanced and stable state; 5, obtaining the shear modulus G of the model; 6, obtaining the adhesion work Wcohesion of the model; 7, obtaining a self-diffusion coefficient delta of the model; and 8, determining a judgment matrix, constructing a model about evaluation of the anti-cracking performance of the graphene modified asphalt, and calculating the anti-cracking performance of the graphene modified asphalt with the corresponding mixing amount by combining the shear modulus, the adhesion work and the self-diffusion coefficient. Through molecular dynamics simulation, the influence of the graphene doping amount on the anti-cracking performance of the graphene modified asphalt is more scientifically and intuitively represented.
本发明公开了一种石墨烯改性沥青抗裂性能评价方法，属于改性沥青力学性能评价技术领域。方法包括如下步骤：一、将基质沥青分为四种组分，并计算各组分所占重量比；二、计算得出沥青分子模型中各组分分子模型数量；三、构建石墨烯改性沥青共混体系分子模型；四、使各石墨烯改性沥青共混体系分子模型达到平衡稳定的状态；五、得到模型的剪切模量G；六、得到模型的黏附功Wcohesion；七、得到模型的自扩散系数δ；八、确定判断矩阵，构建关于石墨烯改性沥青抗裂性能评价的模型，结合剪切模量、黏附功及自扩散系数计算得出对应掺量的石墨烯改性沥青的抗裂性能。本发明通过分子动力学模拟，更加科学直观的表征了石墨烯掺量对石墨烯改性沥青抗裂性能的影响。
Method for evaluating crack resistance of graphene modified asphalt
The invention discloses a method for evaluating the crack resistance of graphene modified asphalt, and belongs to the technical field of mechanical property evaluation of modified asphalt. The method comprises the following steps: 1, dividing matrix asphalt into four components, and calculating the weight ratio of each component; 2, calculating to obtain the number of each component molecular model in the asphalt molecular model; 3, constructing a graphene modified asphalt blending system molecular model; 4, enabling each graphene modified asphalt blending system molecular model to reach a balanced and stable state; 5, obtaining the shear modulus G of the model; 6, obtaining the adhesion work Wcohesion of the model; 7, obtaining a self-diffusion coefficient delta of the model; and 8, determining a judgment matrix, constructing a model about evaluation of the anti-cracking performance of the graphene modified asphalt, and calculating the anti-cracking performance of the graphene modified asphalt with the corresponding mixing amount by combining the shear modulus, the adhesion work and the self-diffusion coefficient. Through molecular dynamics simulation, the influence of the graphene doping amount on the anti-cracking performance of the graphene modified asphalt is more scientifically and intuitively represented.
本发明公开了一种石墨烯改性沥青抗裂性能评价方法，属于改性沥青力学性能评价技术领域。方法包括如下步骤：一、将基质沥青分为四种组分，并计算各组分所占重量比；二、计算得出沥青分子模型中各组分分子模型数量；三、构建石墨烯改性沥青共混体系分子模型；四、使各石墨烯改性沥青共混体系分子模型达到平衡稳定的状态；五、得到模型的剪切模量G；六、得到模型的黏附功Wcohesion；七、得到模型的自扩散系数δ；八、确定判断矩阵，构建关于石墨烯改性沥青抗裂性能评价的模型，结合剪切模量、黏附功及自扩散系数计算得出对应掺量的石墨烯改性沥青的抗裂性能。本发明通过分子动力学模拟，更加科学直观的表征了石墨烯掺量对石墨烯改性沥青抗裂性能的影响。
Method for evaluating crack resistance of graphene modified asphalt
一种石墨烯改性沥青抗裂性能评价方法
GU XINGYU (author) / DONG XIYANG (author) / HU DONGLIANG (author)
2021-07-23
Patent
Electronic Resource
Chinese
IPC:
G16C
Evaluating the Fatigue Resistance of the Innovative Modified-Reinforced Composite Asphalt Mixture
| DOAJ | 2020