Generalized Interface Shear Strength Equation for Recycled Materials Reinforced with Geogrids

Sustainability

Arul Arulrajah¹  Nguyen Chi Thanh²  Amornrit Phuangsombat³  Menglim Hoy⁴  Suksun Horpibulsuk⁴  Artit Udomchai⁴  Apichat Suddeepong⁵ 

[1] Department of Civil and Construction Engineering, Swinburne University of Technology, Melbourne, VIC 3122, Australia;Department of Materials Technology, Faculty of Applied Sciences, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City 70000, Vietnam;Graduate Program in Construction and Infrastructure Management, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand;School of Civil Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand;School of Civil and Infrastructure Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand;

关键词: ground improvement;    geogrid;    recycled materials;    interface shear strength;    large-direct shear test;    base course reinforcement;   

DOI  :  10.3390/su13169446

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown