基于流变学方法的沥青中高温性能及胶浆抗剪强度研究
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U414

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河北重大科技专项(190438172);河北省交通运输厅科技项目(XF2018-10)


Study on Mid-high Temperature Performance Based on Rheological Method and Shear Strength of Asphalt Mortar
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    摘要:

    为了探究不同改性剂对基质沥青各项性能指标的改性效果,选取三种不同的改性沥青,SBS改性沥青、TPE改性沥青和高黏高弹改性沥青,进行室内试验研究对比。通过改性沥青胶浆锥入度试验、PG高温分级试验、温度扫描试验和MSCR试验,从抗剪强度、中高温性能、抗永久变形及变形恢复等方面系统地评估三种改性沥青的路用效果。研究结果表明:改性沥青及胶浆的制备,需要将制备时间、剪切速率、温度等参数严格控制在合理的范围之内,保证材料满足要求;各种沥青胶浆抗剪强度与温度呈现良好的相关性,并且各个回归方程的相关系数R2非常高,TPE改性沥青胶浆有着较高的抗剪强度;三种改性沥青流变试验显示,TPE改性沥青的中高温抗变性能力和高温蠕变恢复能力最佳,高黏高弹改性沥青次之,SBS改性沥青低于前两种沥青。

    Abstract:

    In order to explore the modification effect of different modifiers on various performance indexes of matrix asphalt, three different modified asphalts, SBS modified asphalt, TPE modified asphalt and high viscosity and high elasticity modified asphalt were selected for indoor test and comparison. Through the cone penetration test of modified asphalt mortar, PG high temperature classification test, temperature scanning test and MSCR test, the pavement effects of the three modified asphalts are systematically evaluated from the aspects of shear strength, medium and high temperature performance, permanent deformation resistance and deformation recovery. The results show that the preparation of modified asphalt and mortar needs to strictly control the preparation time, shear rate, temperature and other parameters within a reasonable range to ensure that the material meets the requirements. The shear strength of various asphalt mortars has a good correlation with temperature, and the correlation coefficient R2 of each regression equation is very high, and the TPE modified asphalt mortar has a high shear strength. The rheological tests of three modified asphalts show that TPE modified asphalt has the best medium-high temperature anti-denatured ability and high temperature creep recovery ability, followed by high viscosity and high elasticity modified asphalt, and SBS modified asphalt is lower than the first two asphalts.

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张泽,白子玉,贺玉莹,姜涛,曹东伟.基于流变学方法的沥青中高温性能及胶浆抗剪强度研究[J].河北工程大学自然版,2022,(4):56-61,85

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  • 收稿日期:2022-07-12
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  • 在线发布日期: 2022-12-29
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