scholarly journals Saving Energy in the Transportation Sector: An Analysis of Modified Bitumen Application Based on Marshall Test

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3025 ◽  
Author(s):  
Syyed Raheel Shah ◽  
Hunain Arshad ◽  
Ahsan Waqar ◽  
Muhammad Saeed ◽  
Salman Hafeez ◽  
...  
Keyword(s):  
Construction Industry ◽  
Road Construction ◽  
Modified Bitumen ◽  
The Road ◽  
Process Modification ◽  
Transportation Sector ◽  
Marshall Test ◽  
Asphalt Mix ◽  
Save Energy ◽  
Major Factors

Energy consumption and material production are two major factors associated with the road construction industry. Worldwide, millions of tons of hot mix asphalt production consume a huge amount of fuel as an energy source in terms of quantity and cost to achieve the standard temperature of up to 170 °C during the mixing process. Modification of bitumen can not only reduce its usage but also the consumption of energy (fuel) during the asphalt mix production process at low temperatures. This study provides a method to save energy by proposing the addition of bitumen modifier in the road construction sector. Furthermore, to make it compatible with the field conditions for road construction, stability analysis is executed on the prepared samples by partially replacing the bitumen with polyurethane foam (PUF) and plastic waste (PW) (at 10%, 20%, 30%, 40%, and 50%). Experimental results demonstrate a reasonable saving in the amount of energy (33%) and material (40% bitumen) used and showed that similar strength of developed asphalt mix can be achieved using PUF. An extensive calculation concludes that these savings could make a huge difference in construction economics of mega road infrastructure projects, especially during an energy crisis.

scholarly journals Performance Evaluation of WMA Containing Re-Refined Acidic Sludge and Amorphous Poly Alpha Olefin (APAO)

2021 ◽  
Vol 13 (6) ◽  
pp. 3315
Author(s):  
Mansour Fakhri ◽  
Danial Arzjani ◽  
Pooyan Ayar ◽  
Maede Mottaghi ◽  
Nima Arzjani
Keyword(s):  
Resilient Modulus ◽  
Permanent Deformation ◽  
Road Construction ◽  
Moisture Damage ◽  
Asphalt Mixtures ◽  
Modified Bitumen ◽  
Alternative Source ◽  
The Road ◽  
Marshall Test ◽  
Alpha Olefin

The use of waste materials has been increasingly conceived as a sustainable alternative to conventional materials in the road construction industry, as concerns have arisen from the uncontrolled exploitation of natural resources in recent years. Re-refined acidic sludge (RAS) obtained from a waste material—acidic sludge—is an alternative source for bitumen. This study’s primary purpose is to evaluate the resistance of warm mix asphalt (WMA) mixtures containing RAS and a polymeric additive against moisture damage and rutting. The modified bitumen studied in this research is a mixture of virgin bitumen 60/70, RAS (10, 20, and 30%), and amorphous poly alpha olefin (APAO) polymer. To this end, Marshall test, moisture susceptibility tests (i.e., tensile strength ratio (TSR), residual Marshall, and Texas boiling water), resilient modulus, and rutting assessment tests (i.e., dynamic creep, Marshall quotient, and Kim) were carried out. The results showed superior values for modified mixtures compared to the control mix considering the Marshall test. Moreover, the probability of a reduction in mixes’ moisture damage was proved by moisture sensitivity tests. The results showed that modified mixtures could improve asphalt mixtures’ permanent deformation resistance and its resilience modulus. Asphalt mixtures containing 20% RAS (substitute for bitumen) showed a better performance in all the experiments among the samples tested.

scholarly journals Performance of asphalt mixtures with a new type of rubber modified bitumen

2021 ◽  
Vol 19 (1) ◽  
pp. 31-54
Author(s):  
Kornel Almássy ◽  
András Geiger ◽  
András Holló ◽  
László Gáspár
Keyword(s):  
Construction Projects ◽  
Road Construction ◽  
Structure Design ◽  
Asphalt Mixtures ◽  
Modified Bitumen ◽  
The Road ◽  
Waste Tyres ◽  
Asphalt Mix ◽  
New Type ◽  
Polymer Modified Bitumen

The rubber modified bitumen 45/80-55 (RMB 45/80-55) product has been used in Hungary as bituminous binder for asphalt mix production since 2013. It is a new kind of rubber bitumen manufactured using patented technology. Over the past 8 years, it has been used to construct or renovate more than 100 asphalt road sections. Originally RMB 45/80-55 was used to replace paving grade bitumen 50/70 in some road construction projects. However, asphalt laboratory results and road construction experience showed that its quality can also achieve or in terms of some parameters exceed that of asphalt mixtures manufactured with polymer modified bitumen 25/55-65 (PMB 25/55-65). Primarily, its excellent resistance to low temperatures and fatigue are outstanding, in this respect; it surpasses the results of asphalts made with polymer modified bitumen. Its favourable fatigue resistance compensates for its lower stiffness; therefore, favourable results were obtained in the case of track structure design too in comparison with PMB. Considering the road construction benefits of this new type of rubber bitumen, as well as the support of the environmentally friendly recovery of waste tyres and fitting into a circular economy, a wider spread of the RMB product is realistically expected in the future.

scholarly journals Recent trends of the emission characteristics from the road construction industry

2011 ◽  
Vol 19 (1) ◽  
pp. 301-301 ◽  
Author(s):  
Sippy K. Chauhan ◽  
Anuradha Shukla ◽  
S. Gangopadhyay ◽  
Sangita Sharma
Keyword(s):  
Construction Industry ◽  
Road Construction ◽  
Emission Characteristics ◽  
The Road ◽  
Recent Trends

scholarly journals The Conjugated Triangle Method CTM of the detection of inconsistent bids in the construction industry

2018 ◽  
Vol 219 ◽  
pp. 04003 ◽  
Author(s):  
Hubert Anysz ◽  
Krzysztof Kaczorek
Keyword(s):  
Construction Industry ◽  
Road Construction ◽  
The Other ◽  
Construction Sector ◽  
The Public ◽  
The Road ◽  
Bid Price ◽  
Triangle Method ◽  
Two Parameters ◽  
Means Of Production

The existing system of bids evaluation in the construction industry does not bring the clients the certainty if all placed bids comprise real, achievable prices. Especially in the road construction sector, where the earthworks create significant part of the works, comparing e.g. the price of 1 km of roads often gives misleading results. The paper comprises the complete proposal to modify the scope of information provided by offerors in the public procurements (in the construction industry) allowing the clients to determine easily if the contractors have placed the consistent offers i.e. if the bid prices are not too high and if the lowest bid price is not a dumping price. The Conjugated Triangle Method (CTM) of inconsistent bid detection in construction industry is based on the three inter-related parameters: means of production, time of works, on the value of works. Regardless of the offered price it should match the other two parameters.

scholarly journals Investigation of Innovation during Bid Evaluation Process in the Road Construction Industry

2021 ◽  
Vol 7 (3) ◽  
pp. 594-613
Author(s):  
Pardeep Kumar Oad ◽  
Stephen Kajewski ◽  
Arun Kumar ◽  
Bo Xia
Keyword(s):  
Construction Industry ◽  
Road Construction ◽  
Evaluation Process ◽  
Value For Money ◽  
Bidding Strategies ◽  
The Road ◽  
Innovative Products ◽  
Private And Public ◽  
Bid Evaluation ◽  
Tender Evaluation

Tender evaluation is the procedure of choosing the best contractor for a particular project from many applicants. Although rational and logical methods can be used for bidding strategies, bid evaluation remains a skill for which an engineer’s verdict is crucial. Contractors commonly witness that tender selection is not an easy job, and the lowest bid does not necessarily win the contract. The tender decision mainly depends on quantifiable measures such as financial costs and paybacks, and qualitative or invisible factors like administrative security accountability, aptitude, and the proficiency of the contractors. Moreover, Bid evaluation is a decision-making procedure that incorporates an extensive criteria range for which the information is not accordingly. Hence, ambiguity linked to such information is not appropriate for this study. This paper aims to evaluate innovation during the bid evaluation process in the road industry. The research results indicate that the private and public sectors in Australia offer innovative products and work methods, given the chance. Therefore, innovation during the bid evaluation process is welcomed and sometimes strongly encouraged. Further, it is important to have strong research in to how to effectively determine value for money in the context of developing suitable and quality roads. Therefore, this research is useful in the context of evaluating factors that help to understand value for money in the road sector in context of bid evaluation process. Doi: 10.28991/cej-2021-03091676 Full Text: PDF

scholarly journals Evaluation of the Potential of Sasobit REDUX Additive to Lower Warm-Mix Asphalt Production Temperature

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1285 ◽  
Author(s):  
Arminda Almeida ◽  
Michela Sergio
Keyword(s):  
Construction Industry ◽  
Road Construction ◽  
Warm Mix Asphalt ◽  
Asphalt Mixtures ◽  
Asphalt Production ◽  
Air Voids ◽  
Health Concerns ◽  
The Road ◽  
Wide Range ◽  
Production Temperature

Environmental and health concerns have been increasing in the road construction industry. This industry has provided several techniques and a wide range of additives to lower the production temperatures of asphalt mixtures, generating, among others, a new mix type called warm-mix asphalt (WMA). This paper aims to evaluate the potential of the Sasobit REDUX additive to lower the production temperatures of WMA. This additive, which is an alternative to the well-known Sasobit, is completely soluble in bitumen at temperatures above 85 °C while the same temperature for the Sasobit is 115 °C. For that reason, three target compaction temperatures were considered (90, 100 and 110 °C) and both Marshall and compactability tests were carried out. A hot-mix asphalt (HMA) was tested in parallel for comparison. It was concluded that the volumetric properties (air voids content about 4%) and the Marshall properties (stability about 11 kN, flow about 4 mm and Marshall quotient higher than 2 kN/km) of the Sasobit REDUX-WMA were globally satisfactory. In relation to the compactability test, the Sasobit REDUX-WMA mixtures were relatively easier to be compacted compared to the HMA mixture. The three Sasobit REDUX-WMA mixtures (90, 100 and 110 °C) exhibited a very similar compactability (differences lower than 0.4%). Therefore, it seems reasonable to conclude that the Sasobit REDUX has potential to lower WMA production temperatures by 20 °C. A reduction of that magnitude would lead to significant environmental gains.

Constructability of Road Pavement Layers Using New-Age (Nano) Modified Emulsion (NME) Stabilisation of Naturally Available Granular Materials in Roads Varying from Highways to Local Access Roads

2021 ◽  
Author(s):  
Gerrit J Jordaan ◽  
Wynand J vdM Steyn
Keyword(s):  
Granular Materials ◽  
Construction Industry ◽  
Road Construction ◽  
Material Design ◽  
New Age ◽  
Ease Of Use ◽  
Disruptive Technology ◽  
The Road ◽  
General Acceptance ◽  
Pavement Testing

The introduction of any new disruptive technology in a traditionally well-established industry, such as the road construction industry, is usually associated with considerable resistance. This is especially relevant when the new technology is based on the use of granular materials traditionally considered to be of an unacceptable quality in combination with relatively new concepts such as New-age (Nano) Modified Emulsions (NME). In such cases, the fact that the material design methods are based on fundamental scientific principles and have been proven in laboratories and through Accelerated Pavement Testing (APT), may be of little influence. However, the general acceptance of new disruptive technologies, e.g. telecommunications and Information Technologies (IT), have been based on the considerable advantages it presented. The same principles are applicable to the general acceptance and use of NME stabilisation/enhancement of materials in the road construction industry. This article is aimed at the practical demonstration of the advantages of the use of nanotechnologies in the construction of the highest order roads (i.e. inter-city multi-lane highways) to lower order access roads (i.e. Low-Volume-Roads (LVR) and even local accesses to farms and in villages/townships). The implementation of NME technologies is directly associated with ease of use, time and cost savings and the addressing and reduction of risks.

scholarly journals Optimization of activities of road construction company based on lean manufacturing tools

2020 ◽  
Vol 157 ◽  
pp. 06003
Author(s):  
Anna Minnullina ◽  
Natalya Solopova
Keyword(s):  
Construction Industry ◽  
Lean Manufacturing ◽  
Road Construction ◽  
Construction Company ◽  
The Road ◽  
A Company

The article proposes an algorithm for implementation of lean manufacturing in relation to a company in the road construction industry. The concept of lean manufacturing involves the possibility of using several tools at the same time to solve the problems and losses encountered during construction and installation works. The results of testing a tool such as a 5S system in a road construction company are presented to confirm simplicity and effectiveness of the proposed recommendations.

Overview of Road Management in Russia

1996 ◽  
Vol 1558 (1) ◽  
pp. 108-116
Author(s):  
Franck Bousquet ◽  
Cesar Queiroz
Keyword(s):  
Construction Industry ◽  
Cost Savings ◽  
Road Construction ◽  
The Road ◽  
The World Bank ◽  
Road Management ◽  
Large Program ◽  
Federal Highway ◽  
Efficiency And Effectiveness ◽  
Key Issues

The current scarcity of road budgets compared with the significantly higher needs of the Russian road network requires that road administrations improve their management efficiency and effectiveness. Administration effectiveness in general and cost savings in particular are two key issues addressed. Since 1993 the Russian Federal Highway Department (FHD) has embarked on a reform program aimed at separating the functions of road authorities (owner) from those of execution of road works (contractor). What were previously road construction units are being transformed into contractors with management independent from the road authorities. FHD has launched, with the assistance of the World Bank, a large program of road rehabilitation and has opened this field of activity to new contractors working alone or in joint operation with foreign contractors. Many changes have recently occurred in the Russian road management organization. Russian road management at both the federal and regional levels is reviewed, some current problems are explored, and possible improvements are suggested. The main focus is on three aspects of road management: adequate organization of state road-sector functions, which consist of putting in place the systems and procedures for planning, budgeting, designing, and supervising road works; development of an efficient road and bridge construction industry; and establishment of an efficient competitive environment.

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