scholarly journals A Study on Use of Plastic Coated Aggregates (PCA) in Bituminous Concrete Mixes of Flexible Pavement

2018 ◽  
Vol 7 (4.5) ◽  
pp. 396
Author(s):  
Brajesh Mishra ◽  
M. K. Gupta
Keyword(s):  
Road Traffic ◽  
Concrete Pavements ◽  
Continuous Increase ◽  
Waste Plastic ◽  
Air Voids ◽  
Dry Process ◽  
Concrete Mix ◽  
Bitumen Content ◽  
Roadway Design ◽  
Bituminous Concrete

The continuous increase in road traffic and heavy loading in combination with insufficient maintenance due to paucity of funds has resulted in deterioration of road network in India. To improve this proper maintenance, effective and improved roadway design, use of better quality materials and use of effective and modern construction techniques should be put into practice. During last three decades in many countries around the world it has been tested that modification of the bituminous binder with plastic/polymer additives enhances the properties and life of bituminous concrete pavements. The present investigation was carried out to propose the use of plastic coated aggregate (PCA) in bituminous mix of flexible pavements in order to improve their performance and also to give a way for safe disposal of plastic wastes in order to counter environmental pollution as well. There are mainly two processes available for incorporation of waste plastic in bituminous concrete mixes namely wet and dry process.  In this study the dry process was used for bituminous concrete mixes as it being simple and economical. Physical properties of conventional and plastic coated aggregates were compared. The Marshall method of mix design was adopted using VG-10 grade bitumen for conventional aggregates and plastic coated aggregates (PCA). Marshall Specimens were prepared at bitumen content ranging from 4% to 6% with a increment of 0.5% by weight of aggregates and with waste plastic content of 5%, 7%, 9%, 11%, 13% and 15% by weight of optimum bitumen content. Marshal stability, Flow value,  Air voids (Vv), Voids in mineral aggregates (VMA), and Voids filled with bitumen(VFB) were determined and compared with conventional aggregates (without plastic) bituminous concrete mixes. It was found that there was a reduction in consumption of bitumen in bituminous concrete mix by use of plastic coated aggregates also a considerable improvement in the properties of aggregates and bituminous concrete mix leading to provide longer life and improved pavement performance.   

scholarly journals Behaviour of Bituminous Concrete Mixes with addition of Waste Plastic Bottle via Dry Process

2019 ◽  
Vol 9 (2) ◽  
pp. 732-736
Keyword(s):  
Mechanical Properties ◽  
Research Work ◽  
Waste Plastic ◽  
Dry Process ◽  
Plastic Bottle ◽  
Concrete Mix ◽  
Bitumen Content ◽  
Bituminous Pavements ◽  
Plastic Content ◽  
Bituminous Concrete

The research work was carried out to investigate the behaviour of bituminous concrete mix with addition of waste plastic bottles made up of Polyethylene Terephthalate (PET) via dry process. Marshall moulds were prepared with bitumen content 5.0 to 5.8% (with 0.2% increment) and waste plastic content 0%, 4%, 6%, 8%, 10%, 12% and 14 % by weight of bitumen. Mechanical properties required for an ideal mix were determined. Results show that with increase in quantity of PET, mechanical properties of bituminous concrete mixes improve initially up to certain extent. The optimum bitumen content for conventional mixes was found to be 5.66%. Modified mix of 8% PET content with 5.40% bitumen content fulfils the requirements of modified mixes as per IRC SP-98, 2013 specifications. Bitumen content reduced to be 4.59% with addition of waste plastic bottle in bituminous concrete mixes. Hence, application of plastic waste in bituminous pavements is environmental friendly solution in terms of disposal of non-biodegradable waste plastic along with improvement in mechanical properties of bituminous mixes

scholarly journals Study of plastic waste mixed bituminous concrete using dry process for road construction

2018 ◽  
Vol 13 (1) ◽  
pp. 105-112
Author(s):  
Anurag V. Tiwari ◽  
Y. R. M. Rao
Keyword(s):  
Road Construction ◽  
Environmental Problems ◽  
Plastic Waste ◽  
Waste Plastic ◽  
Dry Process ◽  
The World ◽  
The Stability ◽  
Bituminous Concrete

Abstract Waste plastic is accumulation all over the world causing serious environmental problems. This paper aims to study the Plastic Waste Mixed Bituminous Concrete Using Dry Process for Road Construction. The study evaluates the addition of shredded waste plastic in the bituminous concrete which results in significant increase in the stability value and Marshall Properties of mix. The study reveals that the use of waste plastic in bituminous concrete is safe and sustainable for road construction.

scholarly journals Study on Indirect Tensile Strength of Plastic Waste Bituminous Concrete for Road Construction

2018 ◽  
Vol 7 (1) ◽  
pp. 93-106
Author(s):  
Anurag V. Tiwari ◽  
Y R M Rao
Keyword(s):  
Tensile Strength ◽  
Road Construction ◽  
Plastic Waste ◽  
Indirect Tensile Strength ◽  
Combined Process ◽  
Waste Plastic ◽  
Dry Process ◽  
Wet Process ◽  
Indirect Tensile ◽  
Bituminous Concrete

Abstract The rutting and cracking of pavements has become very common problem in India. Also the quantity of plastic waste has significantly increased in the recent year due to industrialization and population growth. Improper disposal of these plastic wastes has caused various environmental problems, hence the alternative use of waste plastic in bituminous concrete for road construction has been encouraged by the community. In the present study the Indirect Tensile Strength Test has been carried out on Marshall Samples confirming to ASTM D6931-12. Three different processes (dry process, wet process and combined process) of mixing of waste plastic were used during experimentation. It was found that the indirect tensile strength (ITS) and tensile strength ratio (TSR) of sample significantly increase up to 8%, 6% and 12% for dry process, wet process and combined process respectively for LDPE and HDPE type of waste plastic.

scholarly journals TRAFFIC-RELATED MORTALITY IN MOLDOVA

2020 ◽  
pp. 140-147
Keyword(s):  
Life Expectancy ◽  
Traffic Accident ◽  
Traffic Accidents ◽  
Road Traffic ◽  
Road Accident ◽  
Road Accidents ◽  
Continuous Increase ◽  
Risk Of Death ◽  
Significant Difference ◽  
Related Mortality

This article analyses the mortality caused by road accidents in Moldova depending on the degree of involvement of pedestrians, cyclists, motorcyclists, drivers and passengers of transport units, depending on age and sex. Results suggest that traffic-related mortality in Moldova has shown an increased incidence among the young and working-age population, where a significant difference between males and females is observed. Among the youth, traffic-related deaths register between 10-27% of the overall mortality in both sexes. The risk exposure of dying in a traffic accident decreases with age and is less significant in the retired ages. During the years 1998-2015, avoidance of trafficrelated deaths would have assured an increase in life expectancy between 0.40-0.56 years in males, and 0.09-0.23 years in females. The continuous increase in the number of transport units on public roads, as well as in the number of hours spent in traffic, influences the degree of exposure to the risk of death or injury as a result of road traffic accidents. Trauma resulting from road accidents increases the incidence of premature mortality and disability among the population, which is reflected by the decrease of healthy life expectancy. It is ascertained that the road accident mortality requires a detailed and comprehensive analysis given the multitude of factors influencing deaths and injuries related to a traffic accident among the population. Thus, in order to improve road safety and reduce mortality incidence among traffic participants, a range of actions has to be implemented by the liable actors, including through the international experience.

scholarly journals An Experimental Study on Plastic Blended Bituminous Concrete Mix Roads

2018 ◽  
Vol 7 (3.35) ◽  
pp. 37
Author(s):  
T. Sarada ◽  
G. Sreeja
Keyword(s):  
Coming Out ◽  
Plastic Material ◽  
New Technology ◽  
Plastic Waste ◽  
Partial Replacement ◽  
New Era ◽  
Pet Bottles ◽  
The People ◽  
Concrete Mix ◽  
Bituminous Concrete

In this new era there are lot of changes are onaerved.But new materials and practices are not coming out that much. Some of the people uses some partial replacement of bitumen and tar which gives some satisfactory results. But later investigations prove that all those materials are not exhibits required properties in all aspects. In that time investigators turn their eye on the recycling materials like rubber and plastic. They noticed that both materials gives the satisfactory results. On the other hand the usage of plastic (polyethylene bags, pet bottles, polystyrene and other plastic products) products increases day by day, that leads to lot of pollution due to plastic waste. This plastic material takes hundreds of years to decompose in the soil. Hence they become complicated to environment. This plastic waste stops the percolations of rain water in to the soil and affects the drainage property of soil. It also damages the soil fertility.A new technology introduced to usages of plastic waste in bitumen to strengthen the bituminous concrete mix and increase the load bearing strength. It will help to reduce the waste plastic content and also make the pavement more durable and strong, economical also 

scholarly journals Catalytic Cracking of Heavy Oil from Waste Plastic in Tapered Circulating Fluidized Bed Riser Reactor

2020 ◽  
Vol 141 ◽  
pp. 01012
Author(s):  
Parinya Khongprom ◽  
Thanapat Whansungnoen ◽  
Permsak Pienduangsri ◽  
Waritnan Wanchan ◽  
Sunun Limtrakul
Keyword(s):  
Fluidized Bed ◽  
Heavy Oil ◽  
Catalytic Cracking ◽  
Circulating Fluidized Bed ◽  
Fluid Model ◽  
Plastic Waste ◽  
Hydrodynamic Behavior ◽  
Continuous Increase ◽  
Waste Plastic ◽  
Two Fluid Model

Because of the continuous increase in the amount of plastic waste, catalytic cracking is an interesting method that could be used to convert heavy oil from thermal cracking of plastic waste into fuel. The objective of this study was to investigate the hydrodynamic behavior and the performance of catalytic cracking of heavy oil in a circulating fluidized bed reactor using computational fluid dynamics. The two– fluid model incorporated with the kinetic theory of granular flow was applied to predict the hydrodynamic behavior with a reactive flow. Three reactor geometries were studied, which included a conventional riser, tapered–out riser, and tapered–in riser. The four–lump kinetic model was used to describe the catalytic cracking of heavy oil from waste plastic. A core–annulus flow pattern was found in the three reactor geometries. The solid fraction distribution of the tapered reactor was found to be more uniform than that of the conventional riser. The tapered–in riser showed the highest heavy oil conversion with the lowest gasoline selectivity. However, the heavy oil conversion and gasoline selectivity of the conventional and tapered–out reactors were not significantly different.

Compaction Quality of Bitumen Mixtures Based on Ultrasonic Methods

2007 ◽  
Vol 353-358 ◽  
pp. 2341-2344
Author(s):  
Tao Xie ◽  
Yan Jun Qiu ◽  
Ze Zhong Jiang ◽  
Bo Lan
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Concrete Pavements ◽  
Destructive Testing ◽  
Air Voids ◽  
Highway Engineering ◽  
Ultrasonic Methods ◽  
Pavement Engineering ◽  
Excellent Method

Water damage of asphalt concrete pavements has been one of the major distresses in highway engineering. Engineering experiences and research results indicate that this damage is due to the extortionate air voids of bitumen mixtures. Paranormal porosity of asphalt mixture is largely the result of the poor controlling of compact degree during paving process. The quality of asphalt pavement is subjected to the controlling methods of compacting of bitumen mixtures. Ultrasonic is an excellent method for non-destructive testing used in various engineering fields. It is also a potentially effective tool to be applied in the control and evaluation of the compaction quality of bitumen mixtures. This paper presents the results of a study aimed at the applicability of ultrasonic technology for evaluation of porosity and compaction quality of bitumen mixtures. It is shown that this technology, which has been successfully used for many years for evaluation of Portland concrete structures, might be used in asphalt pavement engineering to provide a simple, quick, and objective methodology for control and evaluation of the compact quality of bitumen mixtures. The results of laboratory testing demonstrate the potential of this technology.

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