Showing papers in "International Journal of Pavement Engineering in 2020"
TL;DR: This paper proposes a novel method using deep CNN to automatically classify image patches cropped from 3D pavement images, and finds that the size of receptive field has a slight effect on the classification accuracy.
Abstract: The classification of pavement crack heavily relies on the engineers’ experience or the hand-crafted algorithms. Convolutional Neural Network (CNN) has demonstrated to be useful for image classification, which provides an alternative to traditional imaging classification algorithms. This paper proposes a novel method using deep CNN to automatically classify image patches cropped from 3D pavement images. In all, four supervised CNNs with different sizes of receptive field are successfully trained. The experimental results demonstrate that all the proposed CNNs can perform the classification with a high accuracy. Overall classification accuracy of each proposed CNN is above 94%. Upon the evaluation of these neural networks with respect to accuracy and training time, we find that the size of receptive field has a slight effect on the classification accuracy. However, the CNNs with smaller size of receptive field require more training times than others.
111 citations
TL;DR: The International Roughness Index (IRI) as discussed by the authors is a pavement performance indicator which reflects not only the pavement condition but also the ride quality and comfort level of road users. The aim of this pap...
Abstract: International Roughness Index (IRI) is a pavement performance indicator which reflects not only the pavement condition but also the ride quality and comfort level of road users. The aim of this pap...
89 citations
TL;DR: In this paper, the paving thickness of PUAO is only about 20 mm, and it is necessary to study its own performa cation and its own performance in maintenance and new road surface layers.
Abstract: Porous ultra-thin asphalt overlay (PUAO) is widely used in maintenance and new road surface layers. Since the paving thickness of PUAO is only about 20 mm, it is necessary to study its own performa...
80 citations
TL;DR: In this article, the use of polymer nanocomposite for construction of durable asphalt mixtures has been gradually replacing the application of polymer-modified binders, which was introduced in the early nineties.
Abstract: In recent times, the use of polymer nanocomposite for construction of durable asphalt mixtures has been gradually replacing the application of polymer-modified binders. In this investigatio...
68 citations
TL;DR: The introduction of modified asphalt binders provided transportation agencies an effective tool to design balanced mixtures that can resist conflicting distresses while maintaining good long-term longterm stability as discussed by the authors.
Abstract: The introduction of modified asphalt binders provided transportation agencies an effective tool to design balanced mixtures that can resist conflicting distresses while maintaining good long-term d...
59 citations
TL;DR: To cater the demand as an alternative pavement material, pervious concrete exhibits an astonishing significance in the field of eco-friendly pavement design system, due to its overall hydrological properties as mentioned in this paper.
Abstract: To cater the demand as an alternative pavement material, pervious concrete exhibits an astonishing significance in the field of eco-friendly pavement design system, due to its overall hydrological ...
50 citations
TL;DR: In this paper, the authors developed molecular dynamics (MD) models to investigate the diffusion behavior of rejuvenator with aged binder, four types of rejuvenators, straight saturate, cyclic saturate and naphthene.
Abstract: This study developed molecular dynamics (MD) models to investigate the diffusion behaviour of rejuvenator with aged binder. Four types of rejuvenators, straight saturate, cyclic saturate, naphthene...
47 citations
TL;DR: In this paper, the effect of ageing on the viscoelastic characteristics of bitumen was investigated using dynamic mechanical tests (frequency sweep, fatigue, and relaxation) to investigate the effect.
Abstract: Bitumen ageing has a significant impact on the mechanical performance of asphalt concrete. This study utilises dynamic mechanical tests (frequency sweep, fatigue, and relaxation) to investigate the effect of ageing on the viscoelastic characteristics of bitumen. As ageing progressed, a shift of the Black diagrams curves towards lower phase angles was observed; at the same time the shape of the curves changed to a straight line and the curvature reduced. Interestingly, based on the standard fatigue analysis criteria, ageing appears to have a positive effect on bitumen fatigue life. Consequently, it occurs that studying only the stiffness and fatigue behaviour of bitumen cannot directly characterise ageing-induced degradation. The stress relaxation test was found to be more suitable to characterise ageing of bitumen. Aged bitumen had higher residual stresses and longer relaxation times. Hence, aged bitumen was found to be more susceptible to stress accumulation and thus cracking. A linear relationship was established between the crossover modulus and the stress relaxation ageing indices for the studied bitumen. This relationship suggests that crossover modulus has the potential to be used as a parameter to characterise the bitumen relaxation properties by means of routine tests such as the DSR frequency sweep tests.
44 citations
TL;DR: Despite excellent service history, concrete pavement faces accelerated deterioration due to water and chemical ingress through micro cracks and surface voids as discussed by the authors, and surface protection could be an inexpen...
Abstract: Despite excellent service history, concrete pavement faces accelerated deterioration due to water and chemical ingress through micro cracks and surface voids. Surface protection could be an inexpen...
43 citations
TL;DR: In this paper, the authors characterized the mechanical, rheological, induced heating, and induced healing behaviour of asphalt concrete containing steel wool fibers (SWFs) as the conductive constituent.
Abstract: This study characterises the mechanical, rheological, induced heating, and induced healing behaviour of asphalt concrete containing steel wool fibers (SWFs) as the conductive constituent. Induced h...
42 citations
TL;DR: In this article, a comparative life cycle assessment (LCA) was conducted according to a "cradle-to-laid" approach to evaluate the potential environmental impacts related to the use of recycled concretes.
Abstract: In this study a comparative life cycle assessment (LCA) was conducted according to a ‘cradle-to-laid’ approach to evaluate the potential environmental impacts related to the use of recycled concret...
TL;DR: A holistic model framework and consistent methodology is provided, abolishing the need for composite condition indices, data aggregation and homogeneous sections in the M&R optimisation process, and solves for optimal treatment type, timing, work-zone length and layout, minimising agency, road user and environmental life cycle costs.
Abstract: Existing pavement management systems (PMSs) aggregate short survey sections into long homogeneous sections (typically 1–5 km), aiming to reduce the amount of data and formulate a tractable optimisa...
TL;DR: In this article, a 2D wavelet approach is proposed to characterize the pavement texture acquired from the 3D laser scanner, where the texture is decomposed into nine levels from 0.1 to 25.6mm.
Abstract: In this paper, a 2D-wavelet approach is proposed to characterize the pavement texture acquired from the 3D laser scanner. The texture is decomposed into nine levels (from 0.1 mm to 25.6 mm) to extr...
TL;DR: The use of recycling asphalt mixtures with high amounts of reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) can be excessively stiff, brittle, and prone to cracking.
Abstract: Recycled asphalt mixtures with high amounts of reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) can be excessively stiff, brittle, and prone to cracking. The use of recycling ag...
TL;DR: The mean profile depth (MPD) is a widely used two-dimensional macro-texture indicator calculated from a sin... as discussed by the authors, which depends on the macro-and micro-textural characteristics of pavement surface.
Abstract: Skid resistance depends on the macro- and micro-textural characteristics of pavement surface. Mean profile depth (MPD) is a widely used two-dimensional macro-texture indicator calculated from a sin...
TL;DR: In this paper, the Witczak model was used to estimate the dynamic modulus (|E∗|) of asphalt using predictive models to avoid the time-consuming and costly laboratory-based measurements.
Abstract: Dynamic modulus (|E∗|) of asphalt can be estimated using predictive models to avoid the time-taking and costly laboratory-based measurements. Several predictive models such as the Witczak model hav...
TL;DR: The restricted use of reclaimed asphalt pavement (RAP) in hot mix asphalt (HMA) motivates the use of RAP in portland cement concrete (PCC) as an aggregate replacement as discussed by the authors.
Abstract: The restricted use of reclaimed asphalt pavement (RAP) in hot mix asphalt (HMA) motivates the use of RAP in portland cement concrete (PCC) as an aggregate replacement. The addition of RAP causes si...
TL;DR: This study proposes a method for detecting signs of pavement distress based on faster region based convolutional neural network (Faster R-CNN), which could successfully detect cracks and partial patching with accuracy in pavement images.
Abstract: Automatic pavement crack detection is essential for evaluating maintenance requirements and ensuring driving safety. Crack detection plays a primary role in realising the automatic evaluation of pa...
TL;DR: In this paper, molecular dynamic simulation was used to explore the effect of mineral filler on the structural, thermodynamic, and energy properties of asphalt mastic mastic, and to understand the filler reinforcement mechanism.
Abstract: To fully understand the filler reinforcement mechanism in asphalt mastic, molecular dynamic (MD) simulation was adopted to explore the effect of mineral filler on the structural, thermodynamic and ...
TL;DR: In this paper, the cumulative permanent strain of subgrade soils plays an important role in the pavement structure design and long-term pavement performance maintenance in Southern China, the hot and humid clima...
Abstract: The cumulative permanent strain of subgrade soils plays an important role in the pavement structure design and long-term pavement performance maintenance. In Southern China, the hot and humid clima...
TL;DR: Early pavement distress caused by heavy traffic is frequently observed on bridges with relatively thin decks of orthotropic design, particularly in hot climates as mentioned in this paper, and the authors investigated the possibl...
Abstract: Early pavement distress caused by heavy traffic is frequently observed on bridges with relatively thin decks of orthotropic design, particularly in hot climates. This study investigates the possibl...
TL;DR: In this paper, the development of modified emulsified asphalt, cold recycling technique has the potential to be used in pavement layers closer to surface, which has been shown to improve the performance of road surface.
Abstract: With the development of modified emulsified asphalt, cold recycling technique has the potential to be used in pavement layers closer to surface. Three modified emulsified asphalt binders we...
TL;DR: In this paper, rejuvenators can restore the reclaimed asphalt pavement (RAP) binder for another service period to achieve homogeneous distribution of rejuvenator and good diffusion into reclaimed asphalt b
Abstract: Rejuvenators can restore the reclaimed asphalt pavement (RAP) binder for another service period To achieve this, homogeneous distribution of rejuvenator and good diffusion into reclaimed asphalt b
TL;DR: In this paper, the authors present a literature review intended for pavement researchers and professionals, l l e ciently, traffic noise is the perpetual form of environmental pollution adversely affecting human health in urban environments.
Abstract: Traffic noise is the perpetual form of environmental pollution adversely affecting human health in urban environments. This literature review, intended for pavement researchers and professionals, l...
TL;DR: In this article, the effect of filler on the loss of adhesion of asphalt mix was investigated. But the effect on the durability of the asphalt mix is not discussed in detail.
Abstract: The loss of adhesion is one of the primary mechanisms of physical distress in asphalt mixes since it negatively affects the durability of asphalt mix. The effect of filler on this mechanism was exp...
TL;DR: In this article, ground penetrating radar (GPR) is used for detecting buried underground objects in urban area, and deep learning technique is applied into deep learning for detecting underground objects.
Abstract: Ground penetrating radar (GPR) is a promising non-destructive evaluation technique for detecting buried underground objects in urban area. Deep learning technique is recently being applied into thi...
TL;DR: In this paper, the authors have used many methods, from sophisticated numerical simulations to experience-based knowledge, to address fatigue cracking in asphalt pavements, and have shown that fatigue cracking is one of the major distresses in asphalt paving.
Abstract: Fatigue cracking is one of the major distresses in asphalt pavements. Engineers have used many methods, from sophisticated numerical simulations to experience-based knowledge, to address fatigue cr...
TL;DR: In this article, the structural integrity and strength of pavement sections depends on the structure of its individual layers, and Clay-rich soils do not often meet the structural requirements needed to support pavement sections.
Abstract: Long-term performance of pavement sections depends on the structural integrity and strength of its individual layers. Clay-rich soils do not often meet the structural requirements needed to...
TL;DR: In this paper, computed tomography system was used to acquire a contact parameter of aggregates and investigate the effect of aggregate contact condition on the deformation stability of asphalt mixture (DSAM).
Abstract: To investigate the effect of aggregate contact condition on the deformation stability of asphalt mixture (DSAM), computed tomography system was used to acquire a contact parameter of aggregates – t...
TL;DR: In this paper, the compositional and rheological changes of epoxy asphalt, with and without filler, were analyzed by means of Fourier Transform Infrared spectroscopy and Dynamic Shear Rheometer.
Abstract: Oxidative aging is responsible for the irreversible asphalt stiffening and embrittlement leading to asphalt pavements of increased susceptibility to fatigue and thermal cracking. In recent years, various flexible binders have been introduced in asphalt industry to produce long-life pavements and the epoxy asphalt binders are among them. Nevertheless, in-depth understanding of the oxidative aging mechanism of epoxy asphalt binders and binding systems is still needed to enable reliable predictions of material degradation through service life. In this research, the compositional and rheological changes of epoxy asphalt, with and without filler, were analysed by means of Fourier Transform Infrared spectroscopy and Dynamic Shear Rheometer. Especially, kinetics (Arrhenius) parameters of epoxy asphalt have been determined by tracking the chemical composition changes. Oxidation of carbon species in epoxy asphalt is compositional dependent, and low values of activation energy accompany in low values of reaction rate are shown by adding epoxy in asphalt. Furthermore, the epoxy asphalt mastics (binders with filler) have been subjected to rheological testing to evaluate the stiffening effect as oxidation proceeds. Increase of modulus over a wide range of frequencies, decrease of frequency dependency of modulus of epoxy asphalt and shifting of phase angle to lower values are some important observations noticed as well. Overall, oxidation in epoxy asphalt materials occurs slowly yielding to oxygen-resistant binders when epoxy compounds are incorporated in asphalt binders