EFFECTS OF NANOCLAY ON MECHANICAL PROPERTIES OF AGED ASPHALT MIXTURE

2015 ◽  
pp. 49-64
Author(s):  
M Arabani ◽  
A Haghi ◽  
R Tanzadeh
Keyword(s):  
Mechanical Properties ◽  
Asphalt Mixture ◽  
Aged Asphalt

scholarly journals A Comprehensive Evaluation of Rejuvenator on Mechanical Properties, Durability, and Dynamic Characteristics of Artificially Aged Asphalt Mixture

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1554 ◽  
Author(s):  
Pan Pan ◽  
Yi Kuang ◽  
Xiaodi Hu ◽  
Xiao Zhang
Keyword(s):  
Mechanical Properties ◽  
Dynamic Characteristics ◽  
Comprehensive Evaluation ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Physical Property ◽  
Fatigue Property ◽  
Physical Test ◽  
Aged Asphalt

In this study, the aged asphalt binder and mixture were laboratory prepared through short-term ageing testing and long-term ageing testing. Firstly, the effect of rejuvenator on physical properties of aged asphalt binders was investigated. In addition, a series of laboratory tests were performed to evaluate the influence of ageing and rejuvenator content on the mechanical properties, durability and dynamic characteristics of asphalt mixtures. Physical test results of asphalt binder testified that rejuvenator used can efficiently recover the aged asphalt binder. However, the effect of ageing and rejuvenator content exhibits different trends depending on the physical property tests conducted. Moreover, artificially aged asphalt mixture with rejuvenator has better ability to resist moisture damage and ravelling. In addition, the ITSR value is more suitable to evaluate the moisture susceptibility for asphalt recycling. Although rejuvenator improves the thermal cracking resistance and fatigue property of aged asphalt mixture, rejuvenated mixture shows greater modulus and inferior ability to resist reflective cracking than the unaged mixture. Moreover, rejuvenated mixture shows less dependence on frequency at high temperature regions and stronger dependence at low temperature regions compared to unaged and long-term aged mixtures.

Experimental Study of Performance of Asphalt Mixture under Freeze-Thaw Circle Test

2013 ◽  
Vol 723 ◽  
pp. 353-360
Author(s):  
Li Bo Gao ◽  
Xing Hua Fan ◽  
Ming Gao ◽  
Feng Cheng Wang
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Fatigue Life ◽  
Quantitative Analysis ◽  
Dynamic Modulus ◽  
Asphalt Mixture ◽  
Freeze Thaw ◽  
Splitting Strength ◽  
Dynamic Creep ◽  
Road Performance

This paper has studied the mechanical properties (freeze-thaw splitting strength, and dynamic modulus) and road performance (dynamic creep and fatigue life) of the asphalt mixture under the freeze-thaw circle test, and made the quantitative analysis of the influence on the material performance under freeze-thaw circle test.

Laboratory Investigation of Mixing Hot-Mix Asphalt with Reclaimed Asphalt Pavement

2005 ◽  
Vol 1929 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Baoshan Huang ◽  
Guoqiang Li ◽  
Dragan Vukosavljevic ◽  
Xiang Shu ◽  
Brian K. Egan
Keyword(s):  
Layered Structure ◽  
Hot Mix Asphalt ◽  
Coarse Aggregate ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Reclaimed Asphalt Pavement ◽  
Controlled Experiments ◽  
Reclaimed Asphalt ◽  
Aged Asphalt ◽  
Blending Process

This paper presents a laboratory study in which the blending process of reclaimed asphalt pavement (RAP) with virgin mixture was analyzed through controlled experiments. One type of screened RAP was blended with virgin (new) coarse aggregate at different percentages. A blended mixture containing 20% of screened RAP was subjected to staged extraction and recovery. The result from this experiment indicated that only a small portion of aged asphalt in RAP actually participated in the remixing process; other portions formed a stiff coating around RAP aggregates, and RAP functionally acted as “composite black rock.” The resulting composite layered structure was desirable to improve the performance of the hot-mix asphalt mixture.

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