ABSTRACT In this study, a pavement surface texture measurement device is designed and fabricated based on active triangulation. The device acquires 3D surface texture data in a non-contact manner. The device is designed to be reconfigurable, such that there is flexibility in the choice of parameters like data resolution, evaluation area, and speed of data acquisition. The data collected is validated

ABSTRACT This study demonstrated that skid resistance testing in traffic direction does not provide a complete evaluation of traffic polishing effect on pavement skid resistance. Directional British pendulum tests were performed on 14 pavement sections involving the following six modes of vehicle operation: (A) Acceleration, (B) Deceleration, (C) Moving from stop, (D) Stopping, (E) Constant-speed cruising

ABSTRACT This study developed gradient decision tree boosting (GDTB) models to estimate dynamic moduli ( | E ∗ | ) of hot mix asphalt (HMA) mixtures. The GDTB used as input the binder properties, mixture volumetric, and aggregate gradation of the mixtures. The data used for training the GDTB were extracted from a report of the National Cooperative Highway Research Program (NCHRP) project 9-19 [Witczak

ABSTRACT Although sustainable infrastructure is indispensable, there is almost no reported research on an asphalt concrete (AC) and rubberized concrete (RC) composite pavement. Furthermore, each study incorporating rubber mostly deployed one or two supplementary materials. Therefore, the performance of sustainable AC/RC pavements with various supplementary materials including zeolite, slag, fly ash

ABSTRACT Fully mechanics based solutions are proposed to compute the bending fatigue response of asphalt mixture, based on a combination of the simplified viscoelastic continuum damage (S-VECD) theory, the classical beam theory and numerical modelling. Firstly, an S-VECD-based material constitutive model for ABAQUS is customised and validated against standard uniaxial S-VECD tests. It is able to produce

ABSTRACT Previous studies have applied various benchmarking approaches to measure the performance of organisations that are responsible for maintaining the pavements under their jurisdiction. However, there is a paucity of research investigating the influence of uncontrollable ‘environmental’ factors, such as climate and subgrade type, on the efficiency of these organisations. Quantifying and evaluating

ABSTRACT Porous asphalt (PA) mixture is setting off an attractive alternative to be used as surface layer in pavements due to the many profits this mixture provides in terms of noise, safety and environmental aspects. Nonetheless, its use is quite limited due to its low durability in comparison to dense graded asphalt mixtures, reason for which the incorporation of different additives is recommended

ABSTRACT CO2 emission reduction in large-scale pavement network maintenance planning has been an immense concern. The conventional single-objective optimisation modelsoverlook environmental issues such as CO2 emission. However, the introduced multi-objective optimisation aims to enhance the network condition and minimise CO2 emissions simultaneously. Two single-objective (coyote optimisation algorithm

ABSTRACT Ceramsite epoxy asphalt mixture (CEAM) was prepared by adding ceramsite (CS) to replace aggregate with 0%, 16%, 41%, and 63%. The thermal stability of epoxy asphalt (EA) and CS, and their adhesion were analysed. Laboratory tests were performed to assess the mechanical properties and thermal resistance of CEAM compared with styrene–butadiene-styrene (SBS) copolymer modified asphalt. Results

ABSTRACT Results of Falling Weight Deflectometer (FWD) test are dependent upon pavement temperature and its changes daily or seasonally. It is crucial to have the temperature of pavement when FWD data are collected, and also to compare the FWD data for different temperatures. Conventional models for pavement temperature rely on parameters such as air temperature, solar radiation, wind speed, and humidity

ABSTRACT This research investigates if bottom ash produced by incinerating municipal solid waste after recovery of metals and aging (weathering) can be used as a substitute for natural aggregates in the manufacture of concrete without additional treatment, rather than being disposed of in landfill. In this research, the performance of eight concrete mixtures that contained different amounts (0–100%)

ABSTRACT Current Florida Department of Transportation specifications limit reclaimed asphalt pavement (RAP) usage to 20% in polymer-modified asphalt (PMA) mixtures, because aged and brittle RAP binder may reduce benefits of polymer modification. Previous studies indicated RAP binder stiffness and RAP gradation were important characteristics related to RAP mixture cracking performance. This study focused

ABSTRACT An optimal novel approach is proposed to estimate the transition probabilities associated with both homogeneous and non-homogeneous Markov chains. The approach applies an exhaustive optimisation technique to search for the optimal transition probabilities associated with minimal sum of squared errors (SSE), wherein the error defined as the difference between predicted and observed pavement

ABSTRACT Road authorities are challenged by traffic-induced vibrations due to their detrimental effects on humans and to the damage of buildings and structures. For this reason, asphalt mixtures designed as damping layer are investigated to resist vibration and noise caused by traffic loads, while a reliable design method to optimise for the mixes needs to be developed and their damping and mechanical

ABSTRACT Aggregate-binder adhesiveness is a property that can affect the service life of asphalt pavements. In order to reduce the effects of the loss of adhesion between aggregates and binders over time, lime or amine-based anti-stripping agents are commonly used. The objective of this paper is to evaluate the impact of using an amine-based anti-stripping agent on the fatigue life of asphaltic pavements

ABSTRACT The purpose of this study is to explore the microstructure evolution and key properties of porous asphalt mixture under stress. By comparing the image processing of the cutting surface before and after loading, the damage area was determined and verified by the discrete element modelling and simulation results. The change of cavity and the formation of crack are analysed by two-dimensional

ABSTRACT A highway in poor conditions can raise transportation costs. Due to budgetary constraints, pavement maintenance programming is considered a difficult decision-making problem. In this article we propose a novel mathematical model and a different variant of the pavement maintenance management problem, solved with integer linear programming. The novelty of this approach is the use of the Pavement

ABSTRACT The issue of alkali-pumping has emerged in recent years raising concerns on the quality of the newly constructed asphalt pavement. To understand alkali-pumping and its effects, we conducted two-year on-site inspection of a pavement and analysed the mineral composition of alkali-pumping. The water permeability, void characteristics, and water stability of the asphalt pavement with and without

ABSTRACT By referring to the successful application of a cold-resistant plasticizer in the plastic industry, dioctyl adipate (DOA) plasticizer was selected to improve the low-temperature performance of asphalt. Dynamic shear rheometer (DSR) and bending beam rheometer (BBR) tests were conducted to analyse the high and low temperature performance of plasticizer-modified asphalt binder. The residual creep

ABSTRACT This study explored a unique digital image analysis technique to quantify the adhesive failure (AF) in asphalt mixtures subjected to indirect tensile testing and different levels of aging and moisture conditions. Using the tensile strength ratio (TSR) in conjunction with AF, this study grouped asphalt mixture’s moisture resistance into three zones as high (TSR > 80%), moderate (70% < TSR < 80%)

ABSTRACT Recently, there is a growing interest in increasing content of reclaimed asphalt pavement (RAP) material in the production of Hot Mix Asphalt (HMA) pavements to further reduce material costs and to preserve non-renewable resources. This study aims to evaluate the long-term performance of high RAP mixtures containing various softening oils. Both petroleum-based and bio-based oils were applied

ABSTRACT Due to the depletion of conventional asphalt binder resources and price hiking, researchers are focused on introducing environmental friendly and sustainable materials as a replacement to the conventional binder. On the other hand, the production of a large quantity of sugarcane bagasse (SCB) leads to severe environmental problems. Therefore, effective utilisation of SCB bio-oil as a replacement

ABSTRACT This study developed a priority-based optimisation model for Pavement Management Systems (PMS) using Pavement Surface Evaluation and Ratings (PASER) for city roads. By synchronising the available budgets and pavement conditions, the Capital Improvement Plan (CIP) ensures that with a limited annual budget, the overall pavement condition is optimised. Factors used to develop the CIP include:

ABSTRACT Mechanistic-empirical (M-E) fatigue models for asphalt concrete (AC) pavements often ignore damage induced-changes in the AC, although laboratory testing and field studies show that AC modulus deteriorates as the extent and severity of cracking accumulates. This study developed a pseudo fatigue cracking damage model that incorporated damage-induced changes in AC modulus and AC fatigue endurance

ABSTRACT To provide a reference for the gradation-refined design of asphalt mixtures, pore cellular structure model was developed to evaluate the meso-structure of asphalt mixture, and corresponding meso-structural evaluation indices of the coarse aggregate main skeleton and asphalt mortar interference were obtained. Then three different asphalt mixtures were selected to study the influence of gradation

ABSTRACT A novel weighted multi-output neural network (NN) model is proposed for predicting the deterioration of rigid pavements based on Iowa pavement management system data. This first-of-a-kind model simultaneously predicts four pavement condition metrics concerning rigid pavements, including IRI, faulting, longitudinal crack and transverse crack. It provides an opportunity to efficiently evaluate

ABSTRACT Polymers are used worldwide for their unique properties such as a light weight or chemical resistance, but which have led to an environmental challenge because of the time they need to completely decompose when buried in landfills. Complementarily, bitumen generates the second biggest environmental impact in the construction of a road. This paper analyses the mechanical, environmental and

ABSTRACT Pavement Life Cycle Assessment (LCA) is a comprehensive method to evaluate the environmental impacts of a pavement section. It employs a cradle-to-grave approach assessing critical stages of the pavement’s life. Previous LCA case studies used a wide variety of different functional units and factors in order to achieve different goals and scopes. These inconsistent functional units and factors

ABSTRACT Skid-resistance performance of a runway greatly influences aircraft landing safety. A wet runway significantly increases the incidence rates of aircraft overrun. To study the influence of the skid-resistance performance of a runway on aircraft landing, a co-simulation method is proposed. First, a finite element (FE) model of the local tire-water film-runway simulation is established to obtain

ABSTRACT This study examines the applicability to developing countries of a pavement management system (PMS) with less data (two-point) requirement to complement current practice. Due to limited capacity, many developing countries like Uganda have adopted a PMS after specified intervals regardless of deterioration rate (i.e. time-dependent policy). Maintenance planning based on deterioration rate (i

ABSTRACT The possibility of applying wood ash (WA), as a partial replacement of lime in subgrade stabilisation of clay soil of eastern Croatia, was explored in this study. The optimal ratios of lime substitution by WA were determined for the stabilisation of local clays of different plasticity. The results show that WA, a local available alternative material, can be used as a partial replacement of

ABSTRACT This paper presents the average truck equivalency factors for four types of full-trailer trucks on uphill flexible pavements. Rising grades of 6%,12% and 18% are considered in addition to level flexible pavements. To arrive at each truck equivalency factor for the 254 full-trailer trucks studied, the axle loads were obtained from an axle load survey using permanent weighing stations. Assuming

ABSTRACT This research was undertaken to study the effects of grid opening size and tack coat type on both the shear strength and shear fatigue resistance at the interface of fibreglass grid-reinforced asphalt concrete specimens and, more importantly, to correlate these effects with the interfacial fatigue performance under four-point bending beam fatigue loading. The specimens were fabricated using

ABSTRACT This study explores the effectiveness of using recycled irradiated waste polyethylene terephthalate (PET) as a partial replacement for cement in the formulation of cementitious grouts. This study investigates the impact of regular and irradiated PET and fly ash (FA) on the flowability, drying shrinkage, compressive strength and flexural strength of cementitious grouts. It was observed that

ABSTRACT This research study utilized a Thermal Cycler to simulate the field aging conditions and compared with standard laboratory aging methods. The Thermal Cycler intends to simulate asphalt binder aging under specific environmental conditions. The main purpose of the study is to assess the aging potential in the binder during the thermo-oxidation process. Sulphur, Methane Phosphorus Compound, Elvaloy

ABSTRACT This study approaches a multi-stage stochastic mixed-integer programming model for the high-level complexity of large-scale pavement maintenance scheduling problems. The substance of some parameters in the mentioned problems is uncertain. Ignoring the uncertainty of these parameters in the pavement maintenance scheduling problems may lead to suboptimal solutions and unstable pavement conditions

ABSTRACT This study investigates the effect of using different amounts of superplasticizer (SP) (0.25% and 0.50%) on fresh and hardened properties, durability, ultrasonic pulse velocity (UPV) and thermal conductivity of two RCC pavements with cement contents of 12% (269 kg/m3) and 15% (325 kg/m3). The test results demonstrate that the use of 0.50% SP in RCC pavement containing 12% and 15% cement decreased

ABSTRACT Loading tests were carried out on the dowel bar-concrete substructure of concrete pavement. Mechanical characteristics of dowel bar-concrete interaction were studied. In the elastic range of concrete, the bearing modulus, which is a crucial parameter but is usually determined by presumption, was calculated using classic Westergaard equations. Its influencing factors were evaluated such as

ABSTRACT Currently, punchout distress in continuously reinforced concrete pavement (CRCP) frequently occurs even if the reinforcement design strictly adheres to specifications. In this study, a new concept called reinforced concrete pavement with large spacing joints (RCPS) is proposed, and a new isolation layer is applied to the RCPS on the basis of laboratory results. Finally, a test road is constructed

ABSTRACT In hot climate regions asphalt mixes can be designed using the classical volumetric approach supplemented by the evaluation of basic mechanical parameters. To minimize the risk of permanent deformation, composition of the mixes can be defined by selecting densely packed aggregates and low binder contents. Despite the effectiveness of such an approach, mix design systems need to be improved

ABSTRACT The purpose of the study is to clarify the curing effect of raw material composition on waterborne epoxy resin, thereby further improving working performance of waterborne epoxy resin. Based on the preferred variety of epoxy resins and curing agents, different types of waterborne epoxy resins were prepared. The effects of different raw material compositions on the physical properties of waterborne

ABSTRACT Pavement surface texture plays a leading role in the tire-road interaction. To increase the understanding of the pavement texture evolution, two typical asphalt wearing courses, Asphalt Concrete (AC) and Stone Mastic Asphalt (SMA), were polished using the real car tires of Harbin accelerated polishing machine (HAPM). After each polishing cycle, the surfaces were reconstructed using X-ray Computed

ABSTRACT In a mechanistic-empirical (ME) pavement design method, the modulus of asphalt concrete (AC) is essential. The in-situ AC modulus can be obtained by the surface wave method (SWM). However, the measured modulus needs to be adjusted to the design frequency values. This study aimed to propose a frequency adjustment method for the in-situ AC seismic modulus. For this purpose, coring and dynamic

ABSTRACT This paper studies the influence of geometric structure cutting on transverse crack treatment with the discrete elements method (DEM). Suitable strategies for geometrical structure cutting are put forward. The two-dimensional DEM model of asphalt mixture was established firstly. The asphalt mixture was simplified into a combination of voids, coarse aggregates, and asphalt mortar. The microscopic

ABSTRACT In the current research, effort has been made to gain a deeper understanding regarding the parameters affecting the dynamic behaviour of a sandy soil reinforced by Waste Tire Textile Fibres (WTTFs) that are produced during the recycling process of the End of Life Tires (ELTs). Such parameters as loading duration, rest time, and aspect ratio of fibres have been investigated by cyclic triaxial

ABSTRACT Pavement texture is an important characteristic affecting user safety and satisfaction. Despite the large number of studies on pavement texture, there is still a need to further explore the models relating texture to tyre-pavement interaction. In this study, 29 cores were extracted from 15 different pavement surfaces and tested in the laboratory by Ohio department of transportation. The data

ABSTRACT Newly laid asphalt must be adequately cool before it can be trafficked to prevent the development of costly premature damage. Selecting an appropriate traffic-opening temperature of newly laid asphalt airport runway overlay would avoid early damage – while also minimising the disruption to the airport service due to prolonged runway closure in a busy airport. This study aims to investigate

ABSTRACT Gel permeation chromatography (GPC) is commonly used to study the aging and rejuvenation behaviours of asphalt binders, as the sizes of molecules and microstructures in asphalt binders change in such processes. The filtration procedure in preparing GPC specimens, however, may filter out some large-size microstructures in asphalt, making the measured molecular size distribution biased. To investigate

ABSTRACT High rate of construction and demolition waste materials results in a large amount of stockpiled waste materials. Pavement industry is now considering a sustainable approach for asphalt mixture design incorporating certain waste materials. This research investigates the feasibility of substitution of virgin aggregates in asphalt mixes with recycled construction aggregates (RCA) obtained from

ABSTRACT Low values of pavement friction increase crash rates. Some agencies such as FHWA and AASHTO have provided guidelines for the management of pavement friction, including the definition of minimum friction thresholds for roadway networks. Additionally, FHWA lists the Benefit-Cost Ratio (BCR) as one of the methodologies that can assist decision makers in the definition of these thresholds. However

ABSTRACT The paper evaluates the influence of dynamic effects filtration incorporating the method of deflection frequency normalisation on the results of the comparative analysis of FWD dynamic instruments. The authors' calculations are based on a database comprising the results of comparative deflection tests conducted by use of six FWD instruments, on five different test sections, in strictly monitored

ABSTRACT High modulus asphalt concrete (HMAC) mixtures are produced using hard grade binders or modified bitumen and are known to have exceptional resistance towards rutting and fatigue. Due to the similarity between hard binder and aged reclaimed asphalt (RA) binder, HMAC mixtures have great potential to incorporate higher percentages of RA material. Here we present a study evaluating the performance

ABSTRACT The purpose of the study was to use waste rice husk ash (RHA), residual ash generated at the rice husk fuelled clay brick kiln, for manufacturing paving blocks. Strength, durability, water quality of the paved surface run-off and microstructure of specimens were examined. Cement in paving blocks was partially replaced by five percentage of waste RHA: 0%, 5%, 10%, 15%, and 20% (by weight).

ABSTRACT The objective of this paper is to propose a compaction control method that facilitates the use of expansive soil, as embankment material for highways in humid climates. Three types of expansive soils, utilised as general embankment fill in Southern China, were selected for investigating the physical, compaction, and shear strength properties. The compaction-control method was proposed based

ABSTRACT Factors that significantly affect performance of in-service sprayed seals have been identified through developing comprehensive models using a multilevel analysis approach. Subjective condition data of surface distresses from five rural road networks in Victoria/Australia have been used. They include cracking, deformation, texture loss, stone loss and patching. Evaluations of individual distresses

ABSTRACT The foam characteristics that are used to assess the quality of foamed bitumen are conventionally measured manually using a dipstick and stopwatch. Considering the related safety concerns in manual measurement and sensitivity of the performance characteristics of foamed bituminous mixes (FBMs) to the foam characteristics, the present study aimed to improve the process of determining the bitumen

ABSTRACT The lack of sufficient, accurate and time series dataset on road pavement surface condition in most developing countries over time has posed a serious challenge to highway engineers in terms of developing reliable pavement management system. This study examined the trend of flexible road pavement behaviour and surface condition classification from a historic dataset using intelligent algorithms

ABSTRACT Accurate monitoring of concrete pavement support condition is critical for pavement maintenance. This paper proposed a novel support condition monitoring method using distributed optical fiber sensing (DOFS) technology. The DOFS-based method can precisely monitor the support condition on a larger scale. Single-mode optical fiber with a particular rubber encapsulation was applied as a compression

ABSTRACT Shear stress behaviour is one of the predominant characteristics which influence the performance of Interlocking Concrete Block Pavement. The primary objective of the present study is to find the influence of bedding sand and jointing sand on the interface shear stress behaviour of Interlocking Paver Blocks (IPB) and bedding sand. The shear stress behaviour was studied using a large-scale

ABSTRACT This article is related to the development of potholes in bituminous pavements possibly occurring in winter at negative temperature and in presence of pore water in the asphalt concrete (AC) layers. It was shown already that this type of degradation could be due to swelling of the AC pore water. A constitutive law was previously developed to model this phenomenon; the present article deals