Analysis of Flexible Pavements Reinforced with Geogrids

Abstract

Effectiveness of glass fiber grids as a reinforcement of the asphalt layer in a flexible pavement system was investigated. The study involved both laboratory experimental work and computer analysis of pavement sections. Twenty flexible pavement sections (with and without glass fiber grids) were constructed and tested in the laboratory as a part of the experimental study. The laboratory-scale pavement sections were instrumented with pressure cells, displacement gages, and strain gages. Test sections were subjected to 1,000,000 load applications at a frequency of 1.2 Hz. Static loading tests were conducted at intervals of 100,000 load applications. In thirteen experiments, glass fiber grids were used as reinforcement in the asphalt layer. Several computer analyses of flexible pavement sections were performed by using the finite element method (FEM). The laboratory data were compared with results obtained from the computer analyses. Results from this study show that glass fiber grids can be used to improve the performance of flexible pavement systems. It was also observed that the inclusion of glass fiber grid in the asphalt layer provided resistance to crack propagation. Overall, the flexible pavement sections reinforced with glass fiber grids showed better performance under laboratory test conditions.

Damage evaluation during installation of geosynthetics used in asphalt pavements

“…However, the elastic modulus does not represent the real behaviour of geosynthetics. Moreover, the characteristics of as-received geosynthetics are well known through the data supplied by the manufacturers or obtained by laboratory tests, and they are directly included in the design models (Siriwardane et al 2010;Górszczyk and Gaca 2012). However, they do not represent the real behaviour of the geosynthetics because any effects that occur during installation are not taken into account.…”

Study the Using of Reed Mats in Asphalt Pavement Layers

“…Palermo University: stresses due to shear actions (rutting) are reduced by 50%. Siriwardane et al (2010) [8] states the results of an investigation on the effectiveness of geogrid as a reinforcement of asphalt layers in flexible pavements, the vertical displacement have decreased with the inclusion of the geogrid within the asphalt layer with an improvement of approximately 38%. Jassim (2012) [9] are using steel reinforcement grids to study the permanent deformation in wearing course mixes under different temperatures.…”

Evaluation of permanent deformation of geogrid reinforced asphalt concrete using dynamic creep test

“…Researchers generally agree that geogrid reinforced asphalt concrete is more resistant to surface deformation than unreinforced concrete (Austin and Gilchrist, 1996;Bertuliene et al, 2011;Komatsu et al, 1998;Siriwardane et al, 2010;Sobhan et al, 2005). Yet very few researchers have provided a full-range comparison of the effects of the mesh size and tensile strength of such grids on the permanent deformation of bituminous systems.…”