Evaluation of the Styrene Butadiene Rubber Latex Effect on the Performance Characteristics of Semi Rigid Pavement

Document Type : Original Article

Authors
Hamed Khani Sanij 1
Rezvan Babagoli 2
Aliasghar Zartoshti ilbeygi 3
Mohammad Mehdi Khabiri 1
1 Associate Professor, Department of Civil Engineering, Yazd University, Yazd, Iran.
2 Assistant Professor, Department of Civil Engineering, University of Science and Technology of Mazandaran, Behshahr, Iran.
3 M.Sc., Grad., Department of Civil Engineering, Yazd University, Yazd, Iran.
10.22034/road.2024.444171.2257
Abstract
Road construction are usually done with three types of flexible, rigid, and semi rigid pavements. Despite all the advantages of these two types of flexible and rigid pavement, they have also some disadvantages. This pavement is known as the semi-rigid pavement (SRP), where the surface consists of semi-flexible materials that can provide some of the best features of flexible and rigid pavement. Semi-rigid pavement, generally known as a grouted macadam, includes an open-graded asphalt structure with 25 to 35 percent voids in which a cementitious slurry is used. The main purpose of this thesis is to investigate the effect of SBR latex on the performance characteristics of semi-rigid pavement. To do this, the porous asphalt design was first required. The optimum bitumen content of porous asphalt was calculated to be 3.974 %. The next step was to determine the properties of the cement slurry and to calculate the optimal W/C ratio. Sixteen types of semi-rigid pavements specimens were made in Marshall molds and cement slurry injection was performed. Then, the Marshall Stability Test, the resilient modulus and Cantabro loss were carried out. The results showed that the use of latex SBR in bitumen porous asphalt improves the properties of semi-rigid pavement. The use of SBR latex in cement slurry increased the resilient modulus both in the long time and in the short time, but reduced the amount of marshal stability and adhesion between aggregates in the short time.
Keywords
Semi-Rigid Pavement
Porous Asphalt Mixture
Cement Slurry
SBR Latex
Performance Tests
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