scholarly journals Functional Evaluation Of Pathologies In Flexible Pavement

Author(s):  
Jéssica Wanderley Souza do Nascimento ◽  
Caíque Assunção dos Santos ◽  
Allefy Teles Sampaio ◽  
Filipi Magalhães de Queiroz ◽  
Thiago de Albuquerque Barreto

Highways are of essential importance, since they are the main mode of transportation in the country, with a vast territorial extension of roads. However, many of these highways present some kind of alteration in their initial shape. The concept of paving, pathologies and their causes, as well as their recovery, are thus constituted. These problems were visually evaluated according to the Asphalt Pavement Restoration Manual of the DNIT (National Department of Transportation Infrastructure) in accordance with the TER 005/2003 and PRO 009/2003 standards, in a different area of the city of Manaus, namely the South Zone, consisting of the roads of the Industrial Complex, which allows the transportation of containerized cargo to the ports. The results, based on the visual surveys carried out and the current serviceability values, indicated roads with a concept between bad and regular.

2016 ◽  
Vol 1 (1) ◽  
pp. 7-17
Author(s):  
Nurul Syala Abdul Latip ◽  
Shuhana Shamsudin ◽  
Mohd Shahir Liew

The 'Kuala Lumpur Waterfront' may be unfamiliar to many. Kuala Lumpur is a city that originates at the confluence of two rivers, the Klang and Gombak Rivers. The waterfront used to be very busy with activities when it was once a trading post for the export of tin. This was once the lifeline of the city - its main mode of transportation. The activity at the waterfront has changed over the years along with the social, economic and physical development of the city. Many waterfront cities throughout the world have gone through similar changes when the mode of transportation changed from water to the motor system. A number of cities have made efforts to integrate the cities' activities with their water body. This research attempts to investigate the functional aspects at the Kuala Lumpur waterfront within the city centre in terms of its level of contextual integration with the urban rivers in the current context. The technique adopted for this research is field observations which include building use survey and time interval observation to investigate the Junctional aspects in ten demarcated zones along the Kuala Lumpur waterfront within the city centre. The research concluded with the finding that all the zones have medium level of contextual integration between the waterfront and the urban river in terms of its building use, which depends much on the continuity of activities, their positioning location, accessibility and the provision of space and facilities. © 2016 The Authors. Published for AMER ABRA by e-International Publishing House, Ltd., UK.. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, UniversitiTeknologi MARA, Malaysia. DOI: http://dx.doi.org/10.21834/aje-bs.v1i1.164 Keywords: Contextual integration, waterfront, urban river, activity


2021 ◽  
Vol 16 (01) ◽  
pp. e46-e50
Author(s):  
Carmen Joanna González Lemus ◽  
Fernando Xavier Romero Prieto

Abstract Objective This study aimed to estimate the prevalence of brachial plexus injuries and to characterize clinically and epidemiologically patients with brachial plexus injury. Materials and Methods In this cross-sectional descriptive study, 2,923 medical records of patients aged 1 to 64 years who presented at outpatient peripheral nerve unit of the Orthopedic Surgery Department of Hospital Roosevelt, Guatemala, from January 2017 to December 2017, were prospectively analyzed to identify the prevalence and factors associated with brachial plexus injuries. Results The prevalence rate of brachial plexus injuries in patients was 5.74%. This injury is more common in men (90.5%) aged 24 to 64 years. Brachial plexus injuries occurred secondary to motorcycle accident in 72% of the cases, with the majority affecting the dominant upper extremity. In addition, 64.28% of the patients took 1 to 6 months to seek consultation, whereas only 16.07% requested medical assistance <1 month from the onset of symptoms, and this result was associated with early diagnosis and adequate recovery during follow-up. Furthermore, 66.67% presented upper brachial plexus injury with no associated fractures or vascular injury, manifesting distress while performing daily activities that required hand, arm, and elbow movements. Conclusion The risk of suffering BPIs in Guatemala increases in economically active male patients that use motorcycles as main mode of transportation. Patients should consult immediately after injury onset to optimize management results. For this reason, hospitals must develop specialized clinical guidelines to speed up the identification and treatment of BPI injuries.


2013 ◽  
Vol 671-674 ◽  
pp. 1287-1290
Author(s):  
Ning Li Li ◽  
Xin Po Zhao ◽  
Chuang Du ◽  
Cai Li Zhang ◽  
Qing Yi Xiao

The aging of asphalt pavement gets serious in the course of service due to the large number of vehicles and high pavement temperature. A survey was conducted on urban road’s asphalt pavement in the city of Tianjin. By analyzing the extracted asphalt sample from asphalt pavement built in different years, it shows that asphalt’s softening point and viscosity increase but its penetration and ductility attenuate with the extension of service period. Of which, the ductility changes dramatically with its ductility attenuating fast in the early years of service and the attenuation of ductility tending to slow down later. The vertical difference of aging in different depth of pavement is marked and degree of aging tends to attenuate from the surface to the center.


2013 ◽  
Vol 85 (4) ◽  
pp. 1289-1301 ◽  
Author(s):  
ESTEFAN M. DA FONSECA ◽  
JOSE A. BAPTISTA NETO ◽  
JOHN MCALISTER ◽  
BERNARD SMITH ◽  
MARCOS A. FERNANDEZ ◽  
...  

One of the main results of the processes related to urbanization is the contamination of the adjacent water bodies. Inserted in this context, the Rodrigo de Freitas lagoon is situated in the south zone of the city of Rio de Janeiro. This ecosystem receives several inputs containing all sorts of pollutants, including heavy metals. The present work aimed to study the partitioning of heavy metals in the sediments of Rodrigo de Freitas and the influence of organic matter in this fractionation dynamic. The results of these analyses presented the contents of organic matter as an important metal-capturing agent. Fractionation of organic matter resulted in a predominance of humine. Heavy metal partitioning showed that the metals bound by the water-soluble phase have no significant concentrations. Special features such as, reducing sediment, high levels of organic matter and fine grain size have transformed this ecosystem in an effective deposit of pollutants, where heavy metals are not available in easily reactive fractions.


2020 ◽  
Vol 22 (97) ◽  
pp. 79-87
Author(s):  
S. O. Sidashova ◽  
B. V. Gutyj ◽  
V. I. Khalak ◽  
O. G. Humeny

The article presents the results of studies of indicators of reaching the age of the first calving of repair heifers of the Ukrainian red dairy breed under the conditions of use of the complex scheme of specific immunoprophylaxis and preparation “Multibacterin veterinary suspension”.The research was conducted in the conditions of the industrial complex for milk production of Dolinskoye LLC, Odessa region. The subjects of the study were groups-analogues of breeding heifers and the firstborn of the genotype.The assessment of repair young growth indicators was performed taking into account the following indicators: age of fertile insemination, months; age of first calving, months; milk production for 100 and 305 days of the first lactation, kg. For the functional evaluation of the digestive status of animals used to determine the transit of feed, in % and the assessment of acid-base status of faeces, pH unit. The following indicators were investigated in the serum of repair calves of mating age: total protein, g/l; albumin, g/l; globulin, g/l; glucose, mmol/l; urea, mmol/l; alkaline phosphatase, units/l and liver enzymes (ALT and AST, units/l).The economic efficiency of the results of the studies was calculated according to the indicator “average hope of one cow for 305 days of the first lactation, kg”. It was found that, due to the positive simultaneous effect of probiotic protection of the intestinal mucous membranes, repair heifers showed a higher growth and development rate and the first calving had 28.07 months, which is 2.31 months (8.45 %) earlier than in control (P < 0.001).The optimization of the technology of growing heifers for the use in the scheme of specific immunoprophylaxis of a probiotic drug – immunomodulator, which feed use had a prolonged positive effect not only on the growth parameters of young animals, but also on the increase of milk productivity per first lactation was experimentally proved.Calculations of cost-effectiveness of research results showed that the maximum increase in production (+ 9.10 %) was obtained from the firstborn of the experimental group born to cows mothers older than two lactations, where the scheme of specific prevention of associated diseases was carried out for repair heifers with previous normophilic laceration probiotic feed preparation.


2015 ◽  
Vol 4 (2) ◽  
pp. 68-71
Author(s):  
Marina Yuryevna Garitskaya ◽  
Alina Ivanovna Baitelova ◽  
Ludmila Andreevna Pikus ◽  
Kristina Andreevna Kosacheva

Soil, performing a number of important functions is the geomembrane and affects the flow of most processes in the biosphere. Wherein geochemical processes occurring in the soil play an important role in the fate of contaminants as organic matter while controlling their redistribution in the ecosystem between its various components are generally leads to the formation of stable areas of contamination. The soil not only geochemically components accumulates contaminants, but also acts as a natural buffer that controls the transfer of chemical elements and compounds in the atmosphere. Around industrial enterprises formed geochemical anomalies with high content of pollutants, which can reach a radius of 10-50 km, and the impact of large industrial centers can be traced to a distance of 100 km. All known processes of metal accompanied by the formation of large amounts of waste that pollutes air, water and land surface. Mechanical engineering is an important industry of the Orenburg region and is represented by enterprises of the military-industrial complex, agricultural machinery, machine tools, equipment for ferrous and non-ferrous metals, vehicles, electric household appliances. In the machine-building complex of the Orenburg region includes more than 70 large enterprises. The share of engineering products in the volume of industrial production is about 8%. In this case, the natural environment of the city of Orenburg slabozaschischena from most adverse geo-environmental factors. Based on this, we carried out a study on the quality of soil and environmental situation prevailing in the city of Orenburg, in the zone of influence of the enterprise Plant drilling equipment.


2019 ◽  
Vol 8 (2) ◽  
pp. 51-62
Author(s):  
Ika Sulianti ◽  
Ibrahim Ibrahim ◽  
Agus Subrianto ◽  
Adelia Monita ◽  
Medici Medici

Styrofoam waste presents the environment issue because it is difficult to decompose. As an effort to recycle this pollutant, styrofoam can be utilized as an additive in asphalt concrete mixture. The use of additives aims to create a flexible pavement layer having good performance and meet the requirements. The purpose of this study is to find out whether the addition of styrofoam can improve the quality of asphalt mixtures, and look for alternative additives that can increase asphalt pavement performance. In this study, researchers used food container styrofoam as an addition and incorforated into Asphalt Concrete Wearing Course (AC-WC) mixture. The styrofoam content was 6.5%; 6.75%; 7% ; 7.25%; and 7.5% of asphalt weight. The optimum asphalt contentused is 5.5%. The value of the optimum stability was 3126,002 kg, found at 7.25% of styrofoam content. The best results of Marshall test was obtained at 6.5% of styrofoam content  with stability value  1362,045 kg, VIM value 4,96%, VMA 15,025%, VFA 67,800%, flow 3,44 mm, and MQ 416,338 kg / mm.


2021 ◽  
Vol 42 (2) ◽  
pp. 221
Author(s):  
Thiago Elias Milani ◽  
Avacir Casanova Andrello

Orange is considered the main product of the Brazilian citrus agro-industrial complex. However, in the end of 2016, the ANVISA pointed out orange as a risky product due to contamination using pesticides in its cultivation. Therefore, in this context, an analysis of the chemical elements present in fresh and pasteurized orange juices becomes extremely relevant. Thus, this work aims to quantify the elements that are present in fresh and pasteurized orange juices, using the TXRF technique. Samples of fresh orange juice of Pêra variety were acquired in a store in the city of Londrina-PR, were analysed; three samples of oranges were purchased at a store in Itápolis, São Paulo and five more samples of Pêra orange were obtained in the rural area. Samples of pesticides used in orange cultivation were quantified, and three different trademarks of pasteurized juice were analysed. In some of the samples that were collected in Itápolis-SP market, lead (Pb) element was quantified, however its concentration was within the limit established by Brazilian legislation. The aluminium (Al) element was detected in all samples of pasteurized orange juice, showing the influence of the packaging on the elemental concentration of the juice. All pesticides quantified in this work showed a significant concentration of some micro-contaminants, but when the pesticide was diluted in deionized water, those micro-contaminants could not be quantified.


Author(s):  
R Petrov ◽  
S. Nazarenko ◽  
F. Muravyov ◽  
O. Kutah ◽  
O. Podlubny

Introduction. To date, one of the priority tasks of the agro-industrial complex of Ukraine is to provide the population with benign and safe environmental and veterinary-sanitary products of animal products. Aquaculture is one of the fastest growing industries in the rapidly developing agro-industrial complex. The mentioned industry is able to provide the population with high quality nutritious and dietary fishery products in a relatively short period. Fish products replenish the human diet with essential amino acids, polyunsaturated fatty acids, trace elements and other nutrients to meet the needs of the body. But important indicators are the quality and safety of fish and fish products. The use of hazardous fish products by humans can lead to human diseases. Therefore, research on determining the safety and quality of fish remains an important link. The goal of the work. The purpose of our research was to investigate commercial fish sold in the Sumy trade network and to carry out its veterinary and sanitary evaluation. Materials and methods of research. These studies were conducted under the conditions of the Department of Veterinary Expertise, Microbiology, Zohygiene and Safety and Quality of Livestock Products of Sumy National Agrarian University and in Sumy Regional State Laboratory of the State Consumer Service. Conducted research on commercial fish, which came to the sale in the trade network of the city of Sumy, namely in supermarkets, specialized stores and agri-food markets. Fresh, dried and frozen fish were studied.. Results of research and discussion. As a result of the study of the selected samples was found in live fish, namely the fathead, characteristic signs of postodiplastomosis. This disease manifested itself as small black spots on the body of a fish. It was also revealed in the study of carp in two specimens that the chronic course of aeromonosis was manifested by the presence of fissured ulcers on the body of the fish. Since the detection of the disease did not spoil the product indicators of fish, then all living fish are allowed to sell. When examining dried fish, no deviations from the requirements for dried fish were found in the submitted samples. All fish are identified as benign and admitted for sale. Studies of fresh frozen fish (hake) revealed the presence in the muscle tissue of the nematode Contracoecum squalii Affected fish are characterized by an increased content of microorganisms in the deep and superficial muscle layers, a doubtful or negative reaction to peroxidase, a doubtful or substandard reaction with a Nesler reagent, a doubtful or substandard reaction with sulfuric acid, acidification. Conclusions and prospects for further research: 1. In a study of 323 samples of live, dried, frozen fish, which entered the trade network in Sumy, it was found that 8 (2.47%) samples did not correspond to good-quality fish.2. Signs of diseases characteristic of aeromonosis (2 specimens), postodiplastomosis (1 specimen) and contracenosis (5 specimens) were established in the selected fish samples.3. A batch of hake (170 kg) in which the pathogen Contracoecum squalii was detected is not allowed for sale and is intended for technical disposal. In the future, it is planned to develop and implement a permanent monitoring system for the quality and safety of fish and fishery products that are commercially available.


2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Song Yang ◽  
Bing Qi ◽  
Zhensheng Cao ◽  
Shaoqiang Zhang ◽  
Huailei Cheng ◽  
...  

The strain responses of asphalt pavement layer under vehicular loading are different from those under falling weight deflectometer (FWD) loading, due to the discrepancies between the two types of loadings. This research aims to evaluate and compare the asphalt layer responses under vehicular loading and FWD loadings. Two full-scale asphalt pavement structures, namely, flexible pavement and semirigid pavement, were constructed and instrumented with strain gauges. The strain responses of asphalt layers under vehicular and FWD loadings were measured and analyzed. Except for field measurements, the finite element (FE) models of the experimental pavements were established to simulate the pavement responses under a wide range of loading conditions. Field strain measurements indicate that the asphalt layer strain under vehicular loading increases with the rising temperature roughly in an exponential mode, while it decreases with the rising vehicular speed approximately linearly. The strain pulses in the asphalt layer generated by FWD loading are different from those induced by vehicular loading. The asphalt layer strains generated by FWD loading are close to those induced by low vehicular speed (35 km/h). The results from the FE model imply that the asphalt layer strains under FWD loading and vehicular loading are distributed similarly in the depth profile. For flexible pavement, the position of critical strain shifts gradually from the bottom of the asphalt layer to the mid-depth of the layer, as the temperature increases. For semirigid pavement, the position of critical strain is always located at the intermediate depth of the asphalt layer, regardless of temperatures.


Sign in / Sign up

Export Citation Format

Share Document