Generalized Interface Shear Strength Equation for Recycled Materials Reinforced with Geogrids

Artit Udomchai, Menglim Hoy, Apichat Suddeepong, Amornrit Phuangsombat, Suksun Horpibulsuk, Arul Arulrajah and Nguyen Chi Thanh
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Artit Udomchai: School of Civil Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
Menglim Hoy: School of Civil Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
Apichat Suddeepong: School of Civil and Infrastructure Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
Amornrit Phuangsombat: Graduate Program in Construction and Infrastructure Management, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
Suksun Horpibulsuk: School of Civil Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
Arul Arulrajah: Department of Civil and Construction Engineering, Swinburne University of Technology, Melbourne, VIC 3122, Australia
Nguyen Chi Thanh: Department of Materials Technology, Faculty of Applied Sciences, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City 70000, Vietnam

Sustainability, 2021, vol. 13, issue 16, 1-16

Abstract: In this research, large direct shear tests were conducted to evaluate the interface shear strength between reclaimed asphalt pavement (RAP) and kenaf geogrid (RAP–geogrid) and to also assess their viability as an environmentally friendly base course material. The influence of factors such as the gradation of RAP particles and aperture sizes of geogrid ( D ) on interface shear strength of the RAP–geogrid interface was evaluated under different normal stresses. A critical analysis was conducted on the present and previous test data on geogrids reinforced recycled materials. The D / F D , in which F D is the recycled materials’ particle content finer than the aperture of geogrid, was proposed as a prime parameter governing the interface shear strength. A generalized equation was proposed for predicting the interface shear strength of the form: α = a ( D / F D ) + b , where α is the interface shear strength coefficient, which is the ratio of the interface shear strength to the shear strength of recycled material, and a and b are constants. The constant values of a and b were found to be dependent upon types of recycled material, irrespective of types of geogrids. A stepwise procedure to determine variable a , which is required for analysis and design of geogrids reinforced recycled materials in roads with various gradations was also suggested.

Keywords: ground improvement; geogrid; recycled materials; interface shear strength; large-direct shear test; base course reinforcement; pavement geotechnics (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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