scholarly journals Cradle-to-Gate Life Cycle and Economic Assessment of Sustainable Concrete Mixes—Alkali-Activated Concrete (AAC) and Bacterial Concrete (BC)

2021 ◽  
Vol 6 (7) ◽  
pp. 104
Author(s):  
Kruthi Kiran Ramagiri ◽  
Ravali Chintha ◽  
Radha Kiranmaye Bandlamudi ◽  
Patricia Kara De Maeijer ◽  
Arkamitra Kar
Keyword(s):  
Life Cycle ◽  
Environmental Impact ◽  
Economic Assessment ◽  
Sustainable Concrete ◽  
Coarse Aggregates ◽  
Cradle To Gate ◽  
Equivalent Strength ◽  
Alkali Activated Concrete ◽  
Alkali Activated ◽  
Bacterial Concrete

The negative environmental impacts associated with the usage of Portland cement (PC) in concrete induced intensive research into finding sustainable alternative concrete mixes to obtain “green concrete”. Since the principal aim of developing such mixes is to reduce the environmental impact, it is imperative to conduct a comprehensive life cycle assessment (LCA). This paper examines three different types of sustainable concrete mixes, viz., alkali-activated concrete (AAC) with natural coarse aggregates, AAC with recycled coarse aggregates (RCA), and bacterial concrete (BC). A detailed environmental impact assessment of AAC with natural coarse aggregates, AAC with RCA, and BC is performed through a cradle-to-gate LCA using openLCA v.1.10.3 and compared versus PC concrete (PCC) of equivalent strength. The results show that transportation and sodium silicate in AAC mixes and PC in BC mixes contribute the most to the environmental impact. The global warming potential (GWP) of PCC is 1.4–2 times higher than other mixes. Bacterial concrete without nutrients had the lowest environmental impact of all the evaluated mixes on all damage categories, both at the midpoint (except GWP) and endpoint assessment levels. AAC and BC mixes are more expensive than PCC by 98.8–159.1% and 21.8–54.3%, respectively.

Evaluation of cradle to gate environmental impact of frozen green bean production by means of life cycle assessment

2019 ◽  
Vol 236 ◽  
pp. 117638
Author(s):  
Alessio Ilari ◽  
Daniele Duca ◽  
Giuseppe Toscano ◽  
Ester Foppa Pedretti
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impact ◽  
Green Bean ◽  
Cradle To Gate

Life cycle assessment and cost analysis of fly ash–rice husk ash blended alkali-activated concrete

2021 ◽  
Vol 295 ◽  
pp. 113140
Author(s):  
Sarah Fernando ◽  
Chamila Gunasekara ◽  
David W. Law ◽  
M.C.M. Nasvi ◽  
Sujeeva Setunge ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Fly Ash ◽  
Cost Analysis ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Alkali Activated Concrete ◽  
Alkali Activated

scholarly journals The contribution of life-cycle assessment to environmentally preferable concrete mix selection for breakwater applications

2018 ◽  
Vol 18 (2) ◽  
pp. 413-429 ◽  
Author(s):  
Maristela Gomes da Silva ◽  
Vanessa Gomes ◽  
Marcella Ruschi Mendes Saade
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Portland Cement ◽  
Sodium Silicate ◽  
Impact Category ◽  
Cradle To Gate ◽  
Natural Aggregates ◽  
Comprehensive Framework ◽  
Regulation Compliance ◽  
Alkali Activated

Abstract Life cycle assessment (LCA) provides a comprehensive framework for positioning low energy and global warming potential alternatives regarding Portland cement and concrete. Published LCA work on alkali-activated cements is, however, relatively limited. In this paper, we illustrate how LCA critically supports concrete technological studies in the search for low impact concrete mixes. Previous research on breakwater applications explored replacing a low-clinker Portland cement and natural aggregates with seven different alkali-activated blast furnace slag (bfs) binder systems and with coarse and granulated bfs aggregates. Its outcome suggested a sodium silicate-activated bfs formulation as the best match between concrete properties and environmental regulation compliance. To validate this outcome through LCA, our cradle to gate assessments followed ISO 14044 (INTERNATIONAL…, 2006b) and used Ecoinvent v.2.2 and CML baseline 2001 v.2.05. We adopted the ‘net avoided burden approach’ to handle multifunctionality intrinsic to by-product-based AAC. Whilst sodium silicate-activated mixes rivaled the reference regarding GWP, impacts in several categories were increased. LCA highlighted the implications of driving mix selection by focusing on a single environmental impact category.

scholarly journals Environmental impact of tofu production in West Jakarta using a life cycle assessment approach

2021 ◽  
Vol 896 (1) ◽  
pp. 012050
Author(s):  
I P Sari ◽  
W Kuniawan ◽  
F L Sia
Keyword(s):  
Global Warming ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impact ◽  
Ozone Depletion ◽  
Impact Analysis ◽  
Whole Process ◽  
Assessment Approach ◽  
Cradle To Gate ◽  
The Impact

Abstract Tofu is one of the processed soybean foods that are very popular with Indonesian society. Despite the popularity of Tofu, Tofu production in Indonesia is generally small and medium, reaching 500 kg per day, as in the tofu factory in Semanan, West Jakarta. The purpose of this study is to analyze the environmental impact of tofu production in West Jakarta. The life cycle assessment (LCA) approach was used to achieve this goal with SimaPro software for impact calculations. This research applies the LCA cradle to gate, which consists of soybean cultivation, transportation, and tofu production processes. The environmental impacts of tofu production analyzed in this study include global warming, ozone depletion, acidification, and eutrophication. The impact analysis showed that the acquisition of soybeans, which consisted of soybean cultivation and transportation, had the most significant environmental impact with a global warming potential value of 0.882 kg CO2 eq out of a total of 0.978 CO2 eq for the whole process.

scholarly journals Environmental impact assessment in a company

2019 ◽  
pp. 1-10
Author(s):  
María Elena Tavera-Cortés ◽  
Raúl Junior Sandoval-Gómez ◽  
Guillermo Alexis Vergel-Rangel
Keyword(s):  
Life Cycle ◽  
Environmental Impact ◽  
Impact Assessment ◽  
Mexico City ◽  
Agricultural Sector ◽  
Functional Unit ◽  
Impact Categories ◽  
Processing Stage ◽  
Cradle To Gate ◽  
A Company

This article addresses the environmental impact in an enterprise of the agricultural sector through the analysis of the life cycle of the nopal brine elaboration, where the identified impact categories were identified for their evaluation as well as the opportunities for improvement. The methodology used followed a cradle to gate approach, from the nopal vegetable growing area in Milpa Alta, Mexico City, to the processing stage in the company; the functional unit was a ton of nopal in brine and the software used was SimaPro V8.5.2.

scholarly journals Life-Cycle Assessment and Acoustic Simulation of Drywall Building Partitions with Bio-Based Materials

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1965 ◽  
Author(s):  
Alberto Quintana-Gallardo ◽  
Jesús Alba ◽  
Romina del Rey ◽  
José E. Crespo-Amorós ◽  
Ignacio Guillén-Guillamón
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impact ◽  
Epoxy Composite ◽  
Mineral Wool ◽  
Acoustic Insulation ◽  
Cradle To Gate ◽  
Ecological Transition ◽  
Lca Results ◽  
Sheep Wool

The ecological transition is a process the building industry is bound to undertake. This study aimed to develop new bio-based building partition typologies and to determine if they are suitable ecological alternatives to the conventional non-renewable ones used today. This work started with the development of a bio-based epoxy composite board and a waste-based sheep wool acoustic absorbent. Six different partition typologies combining conventional and bio-based materials were analyzed. A drywall partition composed of gypsum plasterboard and mineral wool was used as the baseline. First, a cradle-to-gate life cycle assessment was performed to compare their environmental impacts. Secondly, a mathematical simulation was performed to evaluate their airborne acoustic insulation. The LCA results show a 50% decrease in the amount of CO2 equivalent emitted when replacing plasterboard with bio-composite boards. The bio-composites lower the overall environmental impact by 40%. In the case of the acoustic absorbents, replacing the mineral wool with cellulose or sheep wool decreases the carbon emissions and the overall environmental impact of the partition from 4% and 6%, respectively. However, while the bio-based acoustic absorbents used offer good acoustic results, the bio-composites have a lower airborne acoustic insulation than conventional gypsum plasterboard.

Towards a Green Quail Meat Production through Life Cycle Perspective

2015 ◽  
Vol 747 ◽  
pp. 282-285
Author(s):  
Amir Hamzah Sharaai ◽  
Mohd Zulfadhli Mat Zainol ◽  
Khairul Izzuddin bin Muhammad
Keyword(s):  
Life Cycle ◽  
Environmental Impact ◽  
Environmental Impacts ◽  
Energy Use ◽  
Meat Production ◽  
Poultry Production ◽  
Iso 14040 ◽  
Feed Production ◽  
Life Cycle Perspective ◽  
Cradle To Gate

Commercial conventional of poultry production at largest scale in this country show escalation year by year, together with high demand of poultry product in Malaysia market. The aim of this research was to identify environmental impact hotspots in the whole supply chain of quail meat production in Jasin, Melaka. At present, assessment of environmental impact of poultry production in Malaysia is lacking.Therefore, this study was conducted to evaluate the energy use and environmental impacts of quail meat production in Jasin,Melaka through life cycle assessment.A cradle-to-gate assessment including distribution stage was conducted based on the ISO 14040/14044 guidelines.Life cycle inventory data was collected from farmers and available literature. Life cycle impact assessment was conducted toidentify environmental impacts using the available method in theopenLCA software.Life cycle processes related to feed production, electricity and water were identified as the major hotspots for energy and they also showed the most significant contribution in GWP and acidication potential among the environmental impacts categories. Improving efficiency of energy and water consumption will reduce the environmental burden associated with quail meat production.Thus, at the end of this research, it will able to make industry player to understand and take into consideration the solutions in order to promote a green quail meat production.

scholarly journals Life cycle assessment (LCA) of potato production

2019 ◽  
Vol 132 ◽  
pp. 02003
Author(s):  
Zbigniew Kowalczyk
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impact ◽  
Potato Production ◽  
Impact Factors ◽  
Environmental Footprint ◽  
Detailed Structure ◽  
Seed Potatoes ◽  
High Consumption ◽  
Cradle To Gate

The paper analyses the detailed structure of the environmental footprint of technologies used for potato production on plantations covering areas of various sizes. The research was conducted for potato cultivation in Lesser Poland. In order to determine the environmental impact with the LCA method, the SimaPro application was used, ver. 8.1.0.60. The “cradle-to-gate” approach was adopted, taking into account the type of technological practices, as well as machines, duration of their operation, number of seed potatoes, fertilisers, pesticides, used fuel and water. The final results were referred to the area of cultivation (1 ha). It was, for instance, found that one of the greatest impact factors of potato cultivation affecting the natural environment is the use of seed potatoes and relatively high consumption of diesel.

scholarly journals Recent update on the environmental impact of geopolymers

2016 ◽  
Vol 1 ◽  
pp. 17 ◽  
Author(s):  
Guillaume Habert ◽  
Claudiane Ouellet-Plamondon
Keyword(s):  
Energy Source ◽  
Life Cycle ◽  
Environmental Impact ◽  
Energy Efficient ◽  
Major Part ◽  
Building Materials ◽  
Research Trends ◽  
Energy Efficient Buildings ◽  
New Energy ◽  
Alkali Activated

The contribution of building materials’ production to environmental impacts becomes significant in the new energy efficient buildings that are currently built. Among those materials, cement represents a major part of the embodied carbon footprint of buildings. Development of alternatives to traditional Portland cement have emerged over the last decades; however, their environmental assessment over their life cycle have resulted in conflicting results, which give a confusing picture of the strategic path to be followed. This paper focuses on the alkali-activated cement and concrete and points out the variability linked with the choice of energy source for the production of the activators and precursors. A review of existing studies is then performed in order to highlight the main benefits of these alternative cements in terms of reduction of greenhouse gas emissions. Finally, the results presented here highlight further research trends for new cements and concrete.

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