Experimental Evaluation of Cold Recycled Asphalt with Clay Bitumen Emulsion

Document Type : Original Article

Authors

1 M.Sc. Student, Civil Engineering Department, Yazd University, Yazd, Iran.

2 Associate Prof., Civil Engineering Department, Yazd University, Yazd, Iran.

3 Assistant Prof., Civil Engineering Department, Yazd University, Yazd, Iran.

Abstract

Researches show that the modification of bitumen with clay can enhance functional properties of asphalt mixtures, such as its resistance to heat, stability and flow. To use this characteristic of clay in cold recycled asphalt we can use clay modified bitumen emulsions. In these research two different types of bentonite is used to emulsify bitumen. Clay modified bitumen emulsion samples were made in laboratory and the agitation was provided by a high speed mixer. After quality control tests conducted, cold recycled asphalt samples were made with obtained emulsions. These samples were evaluated through functional tests such as Marshal Stability test, Indirect Tensile Strength and resilient modules in dry and saturated conditions. The results show that despite of improvements in resistance and strength characteristics of cold recycled asphalt with clay modified bitumen emulsions, they show weak performance in moisture conditions.
 
 
 

Keywords

References

 
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