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Utilization of inferior quality aggregates in asphalt mixes:A systematic review

Journal of Traffic and Transportation Engineering(English Edition) 2022年第5期9卷 864-879页

作者： Surya Narayanan Sakthivel Ankit Kathuria Bhupendra Singh Department of Civil Engineering Indian Institute of Technology JammuJammu 181221India Department of Civil and Infrastructure Engineering Indian Institute of Technology JodhpurKarwar 342037India

Properties of aggregates are majorly influenced by parameters of source rocks viz.,formation process,chemical composition,impurities,volume of pores,and grain *** study presents a review of aggregate treatment methods and its efficacy to enhance the quality of *** aspects of aggregate treatment methods like processing temperature,the dosage of additives,adaptability in the field is studied for three treatment methods viz.,polymer coating,cementitious coating,and chemical *** paper also presents an insight to understand the effect of different treatment methods on mix properties and performance parameters of asphalt *** review revealed that the shape properties of aggregates can be enhanced by the incorporating suitable crushing process(two-stage or three-stage).Whereas,physical and durability properties of aggregates can be improved by various treatment methods like polymer coating,Zycosoil *** was further inferred from the review that treatment methods can have moderate effects on the mechanical properties of aggregates,since,it is mostly dependent on properties of source rocks.

关键词： Mineral aggregates Inferior quality aggregates Treatment methods asphalt mixes Mix performance

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Evaluation of environmental factors to fatigue performance of asphalt mixes

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Journal of Southeast University(English Edition) 2005年第4期21卷 486-489页

作者：虞将苗张肖宁华南理工大学道路工程研究所广州510640

This paper studies the effect of different environmental factors, including the axle load weight, environmental temperature, vehicle speed, and the aging level of asphalt, on the fatigue performance of asphalt mixes based on four-point bending beam fatigue tests. A fractional factorial design method named ＂uniform design＂ was applied in experimental design. The relations of the environmental factors to initial stiffness, fatigue life, phase angle and cumulative dissipated energy were established with the general linear modeling method. It is found that there exists very good correlativity between the environmental factors and the fatigue performance indices of asphalt mixes. The coefficients of total correlation are mainly beyond 0. 95. The results indicate that the consideration of the effect of environmental factors is necessary in the fatigue performance evaluation on real asphalt pavement.

关键词： asphalt mixes fatigue performance environmental factor uniform design phase angle cumulative dissipated energy

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Influence of the Temperature on Coated Bituminous of Road Structures in Senegal (West Africa)

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Open Journal of Civil Engineering 2020年第4期10卷 321-336页

作者： Birame Diouf Adama Dione Papa Sanou Faye Khalil Cissé Mechanics and Modeling Laboratory UFR Engineering Sciences University of Thies Thies Senegal Institute of Earth Sciences Cheikh Anta Diop University Dakar Senegal Laboratory of Materials Mechanics and Hydraulics Polytechnic School of Thies Thies Senegal

The Senegalese road network is strongly influenced in the long term by seasonal variations in climate and weather conditions. Indeed, much of the damage is due to these environmental factors. The objective of this paper is to study the behaviour of bituminous structures under the effect of high temperatures. Material samples were taken for a physico-mechanical characterization of the coated components. The results show that Marshall creep (2.87, 3.39, 5, 5.5 mm) and the bitumen penetrability increase with the increasing of temperatures respectively from 34°C to 45°C and from 20°C to 50°C. Marshall Stability drops from 15.81 kN to 11.31 kN for temperatures between 34°C and 45°C. The simulation carried out on Alize-LCPC shows an increase in distortions of traction at the basis of the rolling layer and at the top of the platform if temperatures vary between 34°C and 45°C. This work makes it possible to conform that the bituminous concrete is thermally sensitive and the hypothesis of fixing the constant modulus of the bituminous layers in Senegal for all projects remains unsuitable for a good dimensioning of sustainable road structures. The knowledge of the equivalent regional temperature will make it possible to produce quality pavements with a long lifespan.

关键词： asphalt mixes Coated Senegal Thermo Susceptibility Performance Dimensioning

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Estimation of the Equivalent Design Temperature of a Pavement in Burkina Faso

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材料科学与工程（中英文B版） 2022年第2期12卷 41-49页

作者： Abdoulaye Koanda Sidpouita Mathilde Koudougou David Y.K.Toguyeni Institut du Génie des Systèmes Industriels et Textiles Ecole Polytechnique de OuagadougouOuagadougouBurkina Faso Laboratoire de Physique et de Chimie de l’Environnement OuagadougouBurkina Faso UniversitéJoseph Ki-Zerbo OuagadougouBurkina Faso

The bituminous pavements of the city of Ouagadougou(Burkina Faso)are made using old design methods which take into account the climate from the notion of equivalent *** an equivalent temperature of 30°C is often used for the design of bituminous *** observation that has been made is that this temperature does not currently make it possible to reduce the problems of early degradation of the pavements linked to meteorological *** objective of this article is to propose a numerical approach for determining the equivalent temperature from temperature measurements taken at the surface of the *** approach consists in jointly using the Alizé-Lcpc sizing software and the Comsol Multiphysics software using the finite element *** a four-layer bituminous pavement,located at 12.38°North and 1.48°West,in Ouagadougou,consisting of a surface course of bituminous concrete of 8 cm and a base course of gravel bitumen of 16 cm,an equivalent temperature of 35°C was obtained.

关键词： asphalt mixes pavement design equivalent temperature

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