Life cycle assessment of natural and mixed recycled aggregate production in Brazil

2017 ◽  
Vol 151 ◽  
pp. 634-642 ◽  
Author(s):  
Laís Peixoto Rosado ◽  
Pierluca Vitale ◽  
Carmenlucia Santos G. Penteado ◽  
Umberto Arena
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Recycled Aggregate ◽  
Aggregate Production

Life Cycle Assessment of Natural and Recycled Concrete Aggregate Production for Road Pavements Applications in the Northern Region of Colombia: Case Study

2019 ◽  
Vol 2673 (5) ◽  
pp. 397-406 ◽  
Author(s):  
Gilberto Martinez-Arguelles ◽  
Maria Paola Acosta ◽  
Margareth Dugarte ◽  
Luis Fuentes
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Northern Region ◽  
Recycled Concrete ◽  
Recycled Aggregates ◽  
Aggregate Production ◽  
Road Base ◽  
Mobile Plant ◽  
The Impact

The environmental impacts of natural aggregates (NA) and recycled concrete aggregates (RCA) production for use in road pavements have been evaluated in this study through an attributional life cycle assessment (LCA) from cradle to gate. Such effort is relevant considering the increasing interest of national agencies in applying recycled aggregates for construction and rehabilitation (C&R) of highway infrastructures. The study used site-specific data from two different aggregate production plants, stationary and mobile, both located in the northern region of Colombia. The stationary facility produces NA, and the mobile plant processes a combination of NA and RCA from the demolition of Portland cement concrete (PCC) pavements in the city of Barranquilla. The aggregates produced in the stationary facility are generally used as road base and subbase materials, and in the production of PCC, whereas the recycled mobile plant produces aggregate for subbase and road base mainly. Two scenarios were contemplated in the study. The first scenario involved extraction, hauling, and processing of NA. The second scenario involved aggregate (limestone) extraction, hauling, and recycling of RCA, and finally processing the combination of NA with RCA. The environmental impacts related to the production process of both stationary and mobile plants were evaluated using the computer program SimaPro 8.4.0 and the impact assessment method IMPACT 2002+. The results showed that diesel fuel is the principal energy used in both production processes, and is mainly responsible for the negative impact on respiratory inorganics, global warming, and nonrenewable energy. Results were very sensitive to transportation distances.

A review of life cycle assessment of recycled aggregate concrete

2019 ◽  
Vol 209 ◽  
pp. 115-125 ◽  
Author(s):  
Yurong Zhang ◽  
Wei Luo ◽  
Jingjing Wang ◽  
Yuanfeng Wang ◽  
Yaqin Xu ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Aggregate Concrete

scholarly journals Environmental Evaluation of Concrete Containing Recycled and By-Product Aggregates Based on Life Cycle Assessment

2020 ◽  
Vol 10 (21) ◽  
pp. 7503
Author(s):  
Seungjun Roh ◽  
Rakhyun Kim ◽  
Won-Jun Park ◽  
Hoki Ban
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impact ◽  
Environmental Impacts ◽  
Bottom Ash ◽  
Environmental Cost ◽  
Recycled Aggregate ◽  
Coarse Aggregates ◽  
Fine Aggregates ◽  
Depletion Potential

This study aims to compare the potential environmental impact of the manufacture and production of recycled and by-product aggregates based on a life cycle assessment and to evaluate the environmental impact and cost when they are used as aggregates in concrete. To this end, the six potential environmental impacts (i.e., abiotic depletion potential, global warming potential, ozone-layer depletion potential, acidification potential, photochemical ozone creation potential, and eutrophication potential) of the manufacture and production of natural sand, natural gravel, recycled aggregate, slag aggregate, bottom ash aggregate, and waste glass aggregate were compared using information from life cycle inventory databases. Additionally, the environmental impacts and cost were evaluated when these aggregates were used to replace 30% of the fine and coarse aggregates in concrete with a design strength of 24 MPa. The environmental impact of concrete that incorporated slag aggregate as the fine aggregates or bottom ash aggregate as the coarse aggregates were lower than that of concrete that incorporated natural aggregate. However, concrete that incorporated bottom ash aggregate as the fine aggregates demonstrated relatively high environmental impacts. Based on these environmental impacts, the environmental cost was found to range from 5.88 to 8.79 USD/m3.

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