Polyester geogrids as asphalt reinforcement – a sustainable solution for pavement rehabilitation

2015 ◽  
pp. 645-651
Author(s):  
Fabiana Leite-Gembus ◽  
Bernd Thesseling
Keyword(s):  
Pavement Rehabilitation

scholarly journals Assessment of Asphalt Road Pavement Rehabilitation and Maintenance Practices: The Case of West Showa Zone in Oromia, Ethiopia

2021 ◽  
Vol 1187 (1) ◽  
pp. 012033
Author(s):  
Lensa Merga Kenea ◽  
Leevesh Kumar ◽  
Sitesh Kumar Singh ◽  
Geleta Chala ◽  
Jifara Chimdi
Keyword(s):  
Pavement Rehabilitation ◽  
Road Pavement ◽  
Asphalt Road

scholarly journals Flexible pavement rehabilitation with continuously reinforced concrete slab with HFRP bars - mechanistic analysis

2019 ◽  
Vol 262 ◽  
pp. 05019
Author(s):  
Magdalena Złotowska ◽  
Roman Nagórski ◽  
Piotr Radziszewski ◽  
Michał Sarnowski ◽  
Paweł Tutka
Keyword(s):  
Fatigue Life ◽  
Environmental Factors ◽  
Negative Impact ◽  
Concrete Slab ◽  
Mechanistic Model ◽  
Continuous Reinforcement ◽  
Reinforced Concrete Slab ◽  
Pavement Rehabilitation ◽  
The Road ◽  
Road Pavement

Asphalt road pavements are subject to damage under the influence of loads from the traffic of vehicles and of the environmental factors. One of the ways to strengthen damaged flexible pavements is to apply a cement concrete overlay with continuous reinforcement. The purpose of this paper is to analyze the road structure with concrete overlay with continuous reinforcement HFRP composite bars, which is laid on the existing cracked asphalt layers of a typical flexible road of KR3 traffic category. In HFRP bars some of the basalt fibers have been replaced with carbon fibers with the addition of resin binders. This do the possibility of making concrete slabs with increased resistance for environmental aggression, with good mechanical properties, which is especially important in the case of road constructions. An analysis of fatigue life of the strengthened asphalt pavement with a concrete slab with continuous reinforcement of HFRP bars was carried out, implementing the mechanistic model of the pavement structure. The stress analysis in the structure under the action of static loading was determined by the Finite Element Method using the Abaqus/Standard program. The maximum value of stress caused by temperature gradient in the concrete slab was calculated from the Westergaard’s formula for infinite slab. It has been shown that strengthening the analyzed road pavement with a continuous reinforcement is a technology that ensures an increase in fatigue life and reinforcement with HFRP bars further increases durability due to the negative impact of environmental factors.

scholarly journals Study of the Stiffness of the Bitumen Emulsion Based Cold Recycling Mixes for Road Base Courses

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5473
Author(s):  
Katarzyna Konieczna ◽  
Piotr Pokorski ◽  
Wojciech Sorociak ◽  
Piotr Radziszewski ◽  
Dawid Żymełka ◽  
...  
Keyword(s):  
Road Construction ◽  
Reclaimed Asphalt Pavement ◽  
Stiffness Modulus ◽  
Pavement Rehabilitation ◽  
Reclaimed Asphalt ◽  
Bitumen Emulsion ◽  
Potential Benefits ◽  
Indirect Tensile ◽  
Reduction Of Energy Consumption ◽  
Cold Recycling

The benefits of the use of cold recycling mixtures (CRMs) in pavement rehabilitation are associated with both the reduction of natural resource consumption by replacing them with recycled materials and the reduction of energy consumption during their production and paving. The evolution of the stiffness of CRMs in road construction and the fatigue life of pavements with CRM base layers are still being investigated. In this paper, CRMs with 1% cement content, called bitumen-stabilized materials with bitumen emulsion (BSM-Es), were examined. Mixtures that were differentiated in terms of Reclaimed Asphalt Pavement (RAP) content, as well as the amount and type of bitumen emulsions, were subjected to indirect tensile stiffness modulus (ITSM) tests at 5 °C, 13 °C, and 20 °C. The thermal sensitivities of the BSM-E mixtures were analyzed. BSM-E mixture stiffness modulus levels at various temperatures were determined using a statistical approach. On the basis of the results obtained, a discussion on the mechanistic-empirical design of flexible pavements with BSM-E base layers is presented. The potential benefits of using BSM-E materials in road construction in certain aspects of pavement life are indicated.

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