scholarly journals Utilizing different wastes in rural roads of Karad, District – Satara, India

2019 ◽  
Vol 9 (1) ◽  
pp. 3464-3469
Keyword(s):  
Electronic Waste ◽  
Heavy Traffic ◽  
Road Construction ◽  
Primary Objective ◽  
Design Guidelines ◽  
Traffic Load ◽  
Main Concern ◽  
Ratio Test ◽  
Rural Roads ◽  
Optimum Content

The rural roads in India comprise of village roads (VR) and other district roads (ODR). The traffic intensity is taken as 2 million standard axles (msa) since traffic load has increased on the rural roads. The design guidelines have recommended the utilization of wastes accessible in the nearby vicinity for road construction. Effective disposal of wastes such as plastic, rubber and electronic waste is the main concern in India. The adverse effects of these identified wastes could be put to a beneficial use if utilized in road construction. Due to the increasing trend of heavy traffic on rural roads, a bituminous Macadam layer is generally laid over granular layers of the pavement. As such, the primary objective of the research is to discover the optimum content of using the identified wastes to replace bitumen and aggregates of rural roads. Numbers of laboratory tests have been carried out on modified mixtures to understand the aptness and optimum content of the wastes in construction of rural roads. The strength property of the naturally available soil was studied for the rural roads in Karad. The California bearing ratio test analysis and their outcomes were employed to assess the strength of the subgrade in the study area. Further, based on the suitability of identified wastes in bituminous layer, IITPave software was used to analyze the performance of rural roads of the study area. Using the IITPave software, design charts were created based on utilizing the wastes for rural roads in Karad, District – Satara, India.

Structural Response Analysis of Highways under Heavy Loads

2013 ◽  
Vol 723 ◽  
pp. 204-211
Author(s):  
Ke Hao Zeng ◽  
Run Hua Guo ◽  
Hong Xue Li
Keyword(s):  
High Speed ◽  
Mechanical Response ◽  
Negative Impact ◽  
Heavy Traffic ◽  
Permanent Deformation ◽  
Road Construction ◽  
Element Model ◽  
Traffic Load ◽  
Economic Losses ◽  
Response Analysis

As China's economic development, substantial growth in traffic, the importance of subgrade in road construction is escalated. Under the vehicle load, subgrade deformation will continue to accumulate and ultimately lead to subgrade permanent deformation. Excessive permanent deformation of subgrade soil will cause enormous economic losses, especially in rutting deformation, and have a direct impact on road performance in safety and comfort. Meanwhile, permanent deformation of subgrade will affect the structural performance of pavement, causing the other forms of damage. For example, the emergence and strengthening of reflective cracking, or accelerated fatigue failure because of too heavy tensile strain (or tensile stress) on the underside of the surface layer, and then caused great negative impact on the pavement structure and service performance. This article examines the role of high-speed heavy traffic load characteristics, and set up finite element model analysis for semi-rigid road structure, the most widely used internal road style, to obtain the mechanical response characteristics under high-speed heavy traffic loads.

scholarly journals Structural Compatibility of Infrastructures Utilizing Alternative Earth Construction Materials

2020 ◽  
Vol 11 (12) ◽  
pp. 7117-7125
Author(s):  
Pauli Kolisoja ◽  
Antti Kalliainen
Keyword(s):  
Mechanical Behavior ◽  
Heavy Traffic ◽  
Construction Materials ◽  
Road Construction ◽  
Design Guidelines ◽  
Element Analysis ◽  
Performance Point ◽  
Alternative Materials ◽  
Low Volume ◽  
Structural Compatibility

Abstract This paper presents analysis of the structural behavior of road pavements in which alternative construction materials are replacing the traditional ones in some of the structural layers. The analysis is consider important since from the structural performance point of view many of the alternative materials have mechanical properties far different from those of the traditional road construction materials, especially unbound aggregates, and as a consequence of that, the empirically calibrated design rules applied and adjusted for the normally utilized pavements solutions are not valid any more. The analysis is exemplified by means of four different low volume road pavement structures that are in line with the existing design guidelines in Finland. The mechanical behavior of these structures is analyzed using three different approaches: semi-empirical Oedemark design approach, multi-layer linear elastic analysis and finite element analysis. The obtained calculation results indicate clearly that if a low volume road structure containing a high stiffness layer made e.g. of stabilized fly ash is resting on soft subgrade soil, tensile stresses up to 1 MPa may be developed. Therefore, the performance and respective distress mechanisms of the structure are likely to be very different from those of a traditional solution. As a key conclusion from the analysis, need for a new concept, structural compatibility, was identified. It would help in drawing due attention to the mechanical behavior of alternative materials when they are used in replacing the traditional ones in road structures exposed to repeated heavy traffic loads. Graphic Abstract

Using complementary remote detection methods for retrofitted eco-passages: a case study for monitoring individual koalas in south-east Queensland

2016 ◽  
Vol 43 (5) ◽  
pp. 369 ◽  
Author(s):  
C. E. Dexter ◽  
R. G. Appleby ◽  
J. P. Edgar ◽  
J. Scott ◽  
D. N. Jones
Keyword(s):  
Road Construction ◽  
Primary Objective ◽  
Correlated Data ◽  
Camera Traps ◽  
Detection Methods ◽  
Urban Landscapes ◽  
Monitoring Methods ◽  
Monitoring Method ◽  
Phascolarctos Cinereus ◽  
The Individual

Context Vehicle-strike has been identified as a key threatening process for koala (Phascolarctos cinereus) survival and persistence in Australia. Roads and traffic act as barriers to koala movement and can impact dispersal and metapopulation dynamics. Given the high cost of wildlife mitigation structures such as purpose-built fauna-specific underpasses or overpasses (eco-passages), road construction and management agencies are constantly seeking cost-effective strategies that facilitate safe passage for fauna across roads. Here we report on an array of detection methods trialled to verify use of retrofitted road infrastructure (existing water culverts or bridge underpasses) by individual koalas in fragmented urban landscapes in south-east Queensland. Aims The study examined whether the retrofitting of existing road structures at six sites facilitated safe passage for koalas across roads. Our primary objective was to record utilisation of retrofitted infrastructure at the level of the individual. Methods We used a combination of existing monitoring methods such as GPS/VHF collars, camera traps, sand plots, and RFID tags, along with a newly developed animal-borne wireless identification (WID) tag and datalogging system, specifically designed for this project, to realise the study aims. Key results We were able to verify 130 crossings by koalas involving a retrofitted structure or a road surface over a 30-month period by using correlated data from complementary methods. We noted that crossings were generally uncommon and mostly undertaken by only a subset of our tagged individuals at each site (21% overall). Conclusions An important element of this study was that crossing events could be accurately determined at the level of the individual. This allowed for detailed assessment of eco-passage usage, rather than the more usual approach of simply recording species’ presence. Implications This study underscores the value of identifying the constraints of each individual monitoring method in relation to site conditions. It also highlights the benefits of contingency planning to limit data loss (i.e. using more than one method to collect data). We suggest an approach that uses complementary monitoring methods has significant advantages for researchers, particularly with reference to improving understanding of whether eco-passages are meeting their prescribed conservation goals.

Evaluation of Fatigue Properties for Ultraviolet Radiation Aged Bitumen and Mixture

2011 ◽  
Vol 217-218 ◽  
pp. 181-186
Author(s):  
Shao Peng Wu ◽  
Jun Han ◽  
Xing Liu
Keyword(s):  
Ultraviolet Radiation ◽  
Heavy Traffic ◽  
Testing Machine ◽  
Road Construction ◽  
Fatigue Properties ◽  
Repeated Loading ◽  
Uv Aging ◽  
Traffic Loads ◽  
Universal Testing ◽  
Layered Clay

Bitumen is widely used in road construction. Due to heavy traffic loads and environmental factors, bitumen properties will change during service life. Bitumen will age due to diffusion of oxygen and UV radiation. Repeated loading will result in decreasing strength because of fatigue. In this paper, one layer clay powder was used to modify base bitumen with different mass contents. Then the influences of ultraviolet radiation (UV) aging on the dynamic fatigue properties of the layered clay powder were evaluated by Dynamic Shear Rheomoter (DSR) and Universal Testing Machine (UTM). The ageing evaluation shows that the ageing resistance of bitumen is improved and this improvement is more notable in bitumen fatigue than mixture.

Measuring heavy traffic with WIM-ROAD and WIM-BRIDGE systems in an urban environment

2021 ◽  
Author(s):  
Maarten Soudijn ◽  
Sebastiaan van Rossum ◽  
Ane de Boer
Keyword(s):  
Heavy Traffic ◽  
Pressure Sensors ◽  
Strain Sensors ◽  
Traffic Load ◽  
Structural Safety ◽  
Special Focus ◽  
The Road ◽  
Weigh In Motion ◽  
Set Up ◽  
Calibration Program

<p>In this paper we present weight measurements of urban heavy traffic comparing two different Weigh In Motion (WIM) systems. One is a WIM-ROAD system using Lineas quartz pressure sensors in the road surface. The other is a WIM-BRIDGE system using optical fibre-based strain sensors which are applied under the bridge to the bottom fibre of a single span of the bridge deck. We have designed our tests to determine which system is most suited to Amsterdam. We put special focus on the accuracy that each system can achieve and have set up an extensive calibration program to determine this. Our ultimate goal is to draw up a realistic traffic load model for Amsterdam. This model would lead to a recommendation that can be used to re- examine the structural safety of existing historic bridges and quay walls, in addition to the current traffic load recommendations.</p>

scholarly journals Heavy Traffic Feasible Hybrid Intracycle and Cyclic Sleep for Power Saving in 10G-EPON

2014 ◽  
Vol 2014 ◽  
pp. 1-13
Author(s):  
Xintian Hu ◽  
Liqian Wang ◽  
Zhiguo Zhang ◽  
Xue Chen
Keyword(s):  
Energy Consumption ◽  
Heavy Traffic ◽  
Optical Network ◽  
Power Saving ◽  
Passive Optical Network ◽  
Traffic Load ◽  
Contributing Factors ◽  
Light Traffic ◽  
Gigabit Ethernet ◽  
Qos Guarantee

Energy consumption in optical access networks costs carriers substantial operational expense (OPEX) every year and is one of contributing factors for the global warming. To reduce energy consumption in the 10-gigabit Ethernet passive optical network (10G-EPON), a hybrid intracycle and cyclic sleep mechanism is proposed in this paper. Under heavy traffic load, optical network units (ONUs) can utilize short idle slots within each scheduling cycle to enter intracycle sleep without postponing data transmission. In this way, energy conservation is achieved even under heavy traffic load with quality of service (QoS) guarantee. Under light traffic load, ONUs perform long cyclic sleep for several scheduling cycles. The adoption of cyclic sleep instead of intracycle sleep under light traffic load can reduce unnecessary frequent transitions between sleep and full active work caused by using intracycle sleep. Further, the Markov chain of the proposed mechanism is established. The performances of the proposed mechanism and existing approaches are analyzed quantitatively based on the chain. For the proposed mechanism, power saving ability with QoS guarantee even under heavy traffic and better power saving performance than existing approaches are verified by the quantitative analysis. Moreover, simulations validate the above conclusions based on the chain.

New construction ideas for special housing complexes

2019 ◽  
Author(s):  
Franco Mola ◽  
Antonio Migliacci ◽  
Elena Mola ◽  
Alejandro Erick Antelo ◽  
Riccardo Soffientini
Keyword(s):  
Primary Objective ◽  
Design Guidelines ◽  
Distinctive Features ◽  
City Environment ◽  
New Construction ◽  
Design Idea ◽  
High Level ◽  
Complex Scenario ◽  
Structural Solutions ◽  
Design Construction

<p>The problems concerning the design, construction and use of buildings in a city environment or even other, less dense, environments, constitute a complex scenario in which various different disciplines are called to give their contribution: energy efficiency, reduction of the footprint, comfort, affordability and new living standards all play a key role in the design of new housing solutions. In the present paper, a new design idea is presented for the construction of buildings, capable of guaranteeing a high level of comfort for the users while safeguarding the surrounding territory. The proposed system, named GEODE, consists of a 120m diameter spherical steel or concrete structure with internal cores acting as shear-resistant elements. The shell contains five decks supported by mega-beams, on which 5-story high buildings can be erected, following design guidelines that have as a primary objective the preservation of high livability conditions. Among the defining characteristics of the system are its enhanced performance with respect to buildings of equal volume but different shape and the possibility of building the spherical shell using two different structural materials. These are distinctive features, which allow for the construction of small self-sufficient cities that synergically interact with their surrounding environment. In the present paper, an initial feasibility study is presented while the performance of different possible structural solutions, i.e. using R.C. or steel elements, are compared.</p>

scholarly journals Evaluating Probabilistic Traffic Load Effects on Large Bridges Using Long-Term Traffic Monitoring Data

Sensors ◽  
2019 ◽  
Vol 19 (22) ◽  
pp. 5056 ◽  
Author(s):  
Lu ◽  
Ma ◽  
Liu
Keyword(s):  
Control Measure ◽  
Heavy Traffic ◽  
Suspension Bridge ◽  
Traffic Monitoring ◽  
Traffic Load ◽  
Monitoring Data ◽  
Traffic Density ◽  
Maximum Deflection ◽  
Load Effects ◽  
Crossing Theory

With the steadily growing of global transportation market, the traffic load has increased dramatically over the past decades, which may develop into a risk source for existing bridges. The simultaneous presence of heavy trucks that are random in nature governs the serviceability limit for large bridges. This study investigated probabilistic traffic load effects on large bridges under actual heavy traffic load. Initially, critical stochastic traffic loading scenarios were simulated based on millions of traffic monitoring data in a highway bridge in China. A methodology of extrapolating maximum traffic load effects was presented based on the level-crossing theory. The effectiveness of the proposed method was demonstrated by probabilistic deflection investigation of a suspension bridge. Influence of traffic density variation and overloading control on the maximum deflection was investigated as recommendations for designers and managers. The numerical results show that the congested traffic mostly governs the critical traffic load effects on large bridges. Traffic growth results in higher maximum deformations and probabilities of failure of the bridge in its lifetime. Since the critical loading scenario contains multi-types of overloaded trucks, an effective overloading control measure has a remarkable influence on the lifetime maximum deflection. The stochastic traffic model and corresponding computational framework is expected to be developed to more types of bridges.

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