Recycled Materials as Substitutes for Virgin Aggregates in Road Construction: II. Inorganic Contaminant Leaching

2011 ◽  
Vol 75 (4) ◽  
pp. 1276-1284 ◽  
Author(s):  
Dong-Hee Kang ◽  
Satish C. Gupta ◽  
P. R. Bloom ◽  
Andry Z. Ranaivoson ◽  
Ruth Roberson ◽  
...  
Keyword(s):  
Road Construction ◽  
Recycled Materials ◽  
Inorganic Contaminant

scholarly journals A Case Study of Industrial Symbiosis to Reduce GHG Emissions: Performance Analysis and LCA of Asphalt Concretes Made With RAP Aggregates and Steel Slags

2020 ◽  
Vol 7 ◽  
Author(s):  
Alessandra Bonoli ◽  
Anna Degli Esposti ◽  
Chiara Magrini
Keyword(s):  
Life Cycle ◽  
Asphalt Pavement ◽  
Ghg Emissions ◽  
Road Construction ◽  
Industrial Symbiosis ◽  
Current Case ◽  
Recycled Materials ◽  
The Road ◽  
Emilia Romagna Region

The concept of sustainability in the road construction sector is a complex issue because of the various steps that contribute to the production and release of greenhouse gas (GHG) emissions. Addressing this issue, the European Commission has put various policy initiatives in place to encourage the construction industry to adopt circular economy (CE) and industrial symbiosis (IS) principles e.g., the use of recycled materials. Cooperativa Trasporti Imola (CTI), a company located in the Emilia-Romagna region (Italy), has been chosen for the current case study to examine practices, management, and the industrial symbiosis network among various companies in the road construction and rehabilitation sector. In this regard, the use of steel slags, obtained by an electric arc furnace (EAF), and reclaimed asphalt pavement (RAP), obtained by the deconstruction and milling of old asphalt pavement have been investigated. Two mixtures of recycled hot Mix Asphalt (HMA) i) were prepared incorporating different recycled material percentages for the wearing and binder course, respectively, ii) were characterized in terms of size distribution, strength modulus and volumetric properties, iii) and finally were compared to the performances of two mixtures entirely designed by virgin materials for the wearing and binder course, respectively. Therefore, the Life Cycle Assessment (LCA) tool was chosen to evaluate the environmental impacts that affect the designed road life cycle. The results show that recycling RAP and EAF slags in a CTI batch plant provides benefits by reducing the consumption of virgin bitumen and aggregates and by reducing CO2eq emissions. Finally, practical implications on the use of recycled materials in new asphalt mixtures from a life cycle and industrial symbiosis perspective are provided.

scholarly journals Reuse of Reclaimed Material in Road Construction Layers

2018 ◽  
Vol 26 (2) ◽  
pp. 40-44
Author(s):  
Petr Mondschein
Keyword(s):  
Czech Republic ◽  
Road Construction ◽  
Past Experience ◽  
Asphalt Pavements ◽  
Recycled Materials ◽  
Asphalt Mixes ◽  
The Czech Republic ◽  
Strong Interest ◽  
Technical Regulations

AbstractThe paper summarizes past experience in the use of reclaimed material in road construction layers according to various technologies applied in road construction. The recycling of asphalt pavements is a standard widely applied and established in road practice for many years. There is strong interest to increase the use of recycled materials in asphalt pavements for cost and environmental reasons. The paper defines the strengths and weaknesses of individual technologies and recommends where and when the use of R-material is appropriate, economically sound and technically justified. The production of new asphalt mixes with more reclaimed material is limited by more factors in the Czech Republic. They include the regulation of the quantity of reclaimed material in the standards and technical regulations. The machine equipment of contractors for recycling is not always sufficient either.

Recycled Materials as Substitutes for Virgin Aggregates in Road Construction: I. Hydraulic and Mechanical Characteristics

2011 ◽  
Vol 75 (4) ◽  
pp. 1265-1275 ◽  
Author(s):  
Dong-Hee Kang ◽  
Satish C. Gupta ◽  
Andry Z. Ranaivoson ◽  
John Siekmeier ◽  
Ruth Roberson
Keyword(s):  
Mechanical Characteristics ◽  
Road Construction ◽  
Recycled Materials

scholarly journals Use of recycled materials in road construction

Business & IT ◽  
2021 ◽  
Vol XI (1) ◽  
pp. 54-60
Author(s):  
Václav Tatýrek ◽  
Dana Měšťanová
Keyword(s):  
Road Construction ◽  
Recycled Materials
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