impact for ballast production

Railway ballast material selection and evaluation: A review

2022年8月15日 The properties of railway ballast material are affected by the local geologies and climatic environments from which the parent rock is sourced. These factors can make it

Railway ballast aggregate characterization through a new strength

2023年7月11日 Ballast is a layer of the railway infrastructure that ensures the correct geometric position of track equipment, distributing vertical loads on the underlying layers. Ballast is

An overview of railway ballast properties and behaviour

2023年3月20日 First, ballast particle size and size distribution curves are discussed, considering opportunities to improve breakage, settlement and drainage characteristics. Next, particle geometry is...

Railway ballast characteristics, selection criteria and

2017年12月30日 Ballast attrition and breakage occur progressively under heavy cyclic loading, causing track deterioration and rail misalignment-affecting safety and demanding frequent and costly track...

Under ballast mat – A review of recent developments, limitations,

2023年1月16日 This paper provides an overview of the recent developments on UBMs, identifies the crucial characteristics of different kinds of mats, including fatigue strength, environmental

Behaviour of ballast stabilised with recycled rubber mat under

2024年1月4日 During the passage of trains, dynamic impact loads caused by wheel imperfections or rail abnormalities cause significant ballast degradation. In this study, the use

Analysis of railway ballast contamination in terms of its potential ...

2022年12月10日 This paper presents new method for environmental risk assessment of the impact of rail ballast reused as a construction material. The proposed method was verified on

Production and Testing of Ballast - Transportation Research Board

Ballast is produced from rock, a natural material that was deposited and subsequently modified in accordance with natural laws of physics and chemistry. Traditionally, little attention has

Ballast water treatment technologies: hydrocyclonic a viable

2010年10月14日 This work reviews the various types of technologies used in treating ballast water and special attention is given to hydrocyclonic system. Small scale pilot plant

A Fuzzy Ballast Water Risk Assessment Model in

2024年4月10日 Recent years have witnessed a growing awareness of the critical role that maritime transport plays in global sustainability, given its significant environmental, economic, and social impacts. Central to this

Railway ballast performance: Recent advances in the

2023年7月1日 Degradation and fouling: High contact forces and ballast layer vibration can increase the ballast wear rate, which results in an increased volume of fines within the ballast matrix. These result in more rapid ballast settlement rate particularly in wet conditions. For high-speed railways, ballast abrasion is a common degradation type, while ballast breakage is

The Impact of Sandy Fouled Ballast Properties on Its Mechanical

The Impact of Sandy Fouled Ballast Properties on Its Mechanical Behavior Ahmed Nabil Ramadan 1, Jinxi Zhang 1, Tianchi Li 2, Biao Xu 1, Peng Jing 3,*. 1 Beijing University of Technology, College of Metropolitan Transportation No.100 Ping Le Yuan, Beijing, China 100124, [email protected]; [email protected]; [email protected]

Effect of Ballast Water on Marine Ecosystem SpringerLink

2018年8月23日 Shipping is one of the sources of transfer of non-native aquatic organisms. Ballast water acts as a vector for such organisms while at the same time being absolutely essential to the safe and efficient operation of ships at present (IMO 2013).. Turkey has a competitive advantage in maritime transport since it is surrounded by the Mediterranean, the

Behaviour of ballast stabilised with recycled rubber mat under impact

2024年1月4日 During the passage of trains, dynamic impact loads caused by wheel imperfections or rail abnormalities cause significant ballast degradation. In this study, the use of rubber mats manufactured from recycled tyres placed underneath a ballast layer is investigated to mitigate the adverse effects of impact loads. Based on a series of tests conducted using a

Improvement of the effectiveness of greywacke crushing process

Keywords: greywacke, crusher, railway ballast, aggregates, quarry. 1. Introduction. T. he construction and maintenance of railways require a signiﬁcant amount of aggregates. Yearly production of railway aggregates in Poland has reached yearly production of ca. 22 mln Mg (in quarries over 0.5 mln Mg) [1]. Railway ballast

BALLAST WATER MANAGEMENT IN SHIPS - ResearchGate

2023年10月18日 1.1 - Impact of ballast water in environment ... waste product, and heat pro duced by backup boiler systems installed on board t he vessel could .

(PDF) On the damage mechanism of high-speed ballast impact

2019年12月1日 It reveals that, for a high-speed ballast impact, ... Zhang, Processing-induced inhomogeneity of yield stress in polycarbonate product. and its inﬂuence on the impact behavior, Polymers 8 (3) ...

Ballast and accessories production for photovoltaic systems

Sun Ballast ® was born with the intention of making a significant contribution to the renewable energy market, which by nature is linked to the challenge and the concept of sustainability.. The activities carried out and the resources used aim to find solutions in which costs, environmental impact and product quality are in complete harmony and in constant improvement.

Impact of Ballast Water on Marine Ecosystems in India: Case

2024年8月14日 Its survival rate and egg production is very high. Though of marine origin, it can survive even in fresh water. Global regulations. The Ballast Water Management (BWM) Convention, enforced by the International Maritime Organization (IMO) since 2017, aims to prevent the spread of harmful aquatic organisms and pathogens through ships' ballast water.

The Impact of Sandy Fouled Ballast Properties on Its Mechanical

The clean ballast exhibits an effective cohesion intercept of 12.3 kPa. This value represents the base cohesion of the ballast material, which is free from any contaminating fines. It has a friction angle of 53.1 degrees, indicating a high resistance to shear due to the coarse, angular nature of the ballast particles that

Effect of Ballast Water on Marine Ecosystem

The major economic impact is the reduction in ﬁsheries production (including collapse of the ﬁshery) due to competition and predation and impacts on aquacul-ture (including closure of ﬁsh farms), especially from introduced harmful algal blooms which was not the case for Turkey. The economic impacts of invasive alien species can be very high.

The ballast effect of lithogenic matter and its

Abstract. Data obtained from long-term sediment trap experiments in the Indian Ocean in conjunction with satellite observations illustrate the influence of primary production and the ballast effect on organic carbon flux into the deep sea.

Effect of Ballast Water on Marine and Coastal Ecology

2013年6月21日 The ballast water used as a ship's stabilizer when it is not loaded has a negative impact on health and the environment and even causes economic losses. One of them is caused by the pathogenic ...

Impact of Ballast Fouling on the Mechanical Properties of Railway ...

2021年7月30日 Impact of Ballast Fouling on the Mechanical Properties of. Railway Ballast: Insights from Discrete Element Analysis. Luyu Wang 1, Mohamed Meguid 1 and Hani S. Mitri 2, * ...

Life cycle assessment of magnetic and electronic ballast for 36

2010年7月8日 Background, aim, and scope Ballast is a device in a fluorescent lamp that supports the production of light. In this study, the environmental impacts of two types of Malaysian ballast, magnetic ballast and electronic ballast, were identified and compared using the life cycle assessment approach through the ISO 14040 (2005) series. Materials and

Ballast Contamination Mechanisms: A Criterial Review of ...

2020年11月2日 As such, a ballast that undergoes crushing under impact will likely sustain the required asperities. for particle interlock, even if the ballast particles are of smaller sizes, ...

Uraduct® Ballast - CRP Subsea

Product Families / Impact abrasion protection / Uraduct® Range / Uraduct® Ballast; Uraduct® Ballast. Make an Enquiry. Uraduct® Ballast . Uraduct® Ballast can be used where additional submerged weight is required for a cable or flowline, ... Uraduct® can be designed to provide a level of impact resistance to reduce the risk of dropped ...

Mechanics of Railway Ballast Behaviour - University of

It is important to have consistent ballast testing methods that provide results reflecting the performance of different ballast materials in the railway trackbed. In this research, extensive laboratory tests were conducted to investigate the correlation between simple ballast index tests, and box tests simulating ballast field loading

Degradation of crumb rubber modified railway ballast under impact ...

2021年2月10日 Impact loads generated from the dynamic effect of passing trains can exacerbate the degradation level of ballast aggregate of railway track. To diminish the induced impact loads, the use of crumb rubber (CR) in the ballast course is characterized as a well-established procedure related to the modification of utilized material. Nonetheless, more in