Comparative environmental evaluation of aggregate production from recycled waste materials and virgin sources by LCA

Hossain, Md. Uzzal; Poon, Chi Sun; Lo, Irene M.C.; Cheng, Jack Chin Pang

doi:10.1016/j.resconrec.2016.02.009

Cited by 409 publications

(128 citation statements)

References 34 publications

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“…In addition, they also determined the multi-criteria optimization for NAC and RAC, based on their local life cycle inventory (LCI). Hossain et al (2016a) in Hong Kong conducted LCA studies to assess and compare the environmental consequences of RCA production from C&D waste and wasted glass, and concrete paving eco-blocks (Hossain et al, 2016b) by using case specific and first hand data. They found that compared with natural coarse aggregates (NCA), RCA produced from C&D waste reduce 65% greenhouse gases (GHGs) emission with a saving of 58% nonrenewable energy consumption.…”

Section: Introductionmentioning

confidence: 99%

A closed-loop life cycle assessment of recycled aggregate concrete utilization in China

2016

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Section: Introductionmentioning

confidence: 99%

A closed-loop life cycle assessment of recycled aggregate concrete utilization in China

2016

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“…There have been many studies published that have compared the environmental impacts of RAC and NAC for structural use [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62]. The environmental impacts of concrete structural elements can be assessed, for instance, by the life cycle assessment method (LCA) [63].…”

Section: Introductionmentioning

confidence: 99%

“…The environmental impacts of concrete structural elements can be assessed, for instance, by the life cycle assessment method (LCA) [63]. The environmental impacts of the lower-grade concrete with RA were assessed and compared with NA [47]. The life cycle assessment of different types of aggregate (e.g., river NA, crushed NA, and coarse RA) used for structural concrete and their comparisons have been published in a few studies.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Masonry Made from Recycled Aggregates: LCA Case Study

et al. 2020

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For a sustainable building industry, reusable construction with a low demand for primary resources is needed. Moreover, if we want to reduce the amount of construction and demolition waste, construction with recycled aggregate should be considered. To investigate the environmental impacts of such concrete construction, life cycle assessment (LCA) was used to compare the following types of concrete construction: Reusable blocks with recycled brick aggregate, reusable blocks with recycled concrete, reusable blocks with natural aggregate, and regular concrete wall. Firstly, the properties of new concrete with recycled aggregate were measured, such as physical, mechanical, and thermal properties. Then, different constructions were designed and assessed using the method of Institute of Environmental Sciences (CML2001) and the method of National Institute for Public Health and the Environment (ReCiPe 2016) as characterization methods. Unsurprisingly, the regular concrete wall had a higher impact on most of the impact categories, e.g., 113 kg CO 2 eq. (in the first scenario, using CML2001). In accordance with the circular principles, the reusability of blocks and recycling of aggregate are the main factors that affect the environmental impact of the constructions. Thus, the global warming potential (GWP) of construction with reusable recycled concrete blocks was only 53 kg CO 2 eq. (in the second scenario). Moreover, we show differences in the results of CML2001 and ReCiPe 2016, e.g., in the Photochemical Oxidant Creation category.

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“…In addition, they found that energy savings in recycling projects are only possible if recycling plants are located close to building sites. Others author such us Dong et al (2015) and Hossain et al (2016) in Hong Kong or Turk et al (2015) in Slovenia conducted LCA studies to evaluate the environmental consequences of NAC and RCA application. They also found that closeness of recycling plants to building sites is a key factor to ensure environmental benefits.…”

Section: Introductionmentioning

confidence: 99%

Multi-criteria decision analysis to assess the environmental and economic performance of using recycled gypsum cement and recycled aggregate to produce concrete: The case of Catalonia (Spain)

Silgado

Valdiviezo

Domingo

et al. 2018

Resources, Conservation and Recycling

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The production of virgin raw materials used in construction and the generation of construction and demolition waste (CDW) are key environmental issues in the construction industry. Portland cement and concrete are used extensively in the construction sector. Processing of CDW to produce recycled gypsum cement and recycled aggregates (RA) and their use in the production of structural and non-structural concrete are one way of slowing natural resource depletion and reducing the amount of CDW landfilled. This study proposes the application of multi-criteria decision analysis (MCDA) to compare the production of "green" concretes made from recycled gypsum cement (RGC) and RA with the production of conventional concrete made from natural aggregate and ordinary Portland cement. The VIKOR MCDA method was employed to determine the best or a set of good alternative(s) for concrete production, considering environmental and economic criteria. The life cycle assessment method was used to select the environmental evaluation criteria, and the reference cost of producing concrete alternatives in Spain was used to determine economic criteria. The results of this study, in which environmental and economic criteria were considered of equal weight, or one of the two criteria was given greater weight, showed that the best option for structural and non-structural concrete was the use of RGC and RA. In both cases, the worst alternative was conventional concrete. In conclusion, we found that the use of RGC and RA in concrete production is positive because it replaces the original raw material, reduces the environmental impact, and lowers the economic costs.

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Comparative environmental evaluation of aggregate production from recycled waste materials and virgin sources by LCA

Cited by 409 publications

References 34 publications

A closed-loop life cycle assessment of recycled aggregate concrete utilization in China

A closed-loop life cycle assessment of recycled aggregate concrete utilization in China

Sustainable Masonry Made from Recycled Aggregates: LCA Case Study

Multi-criteria decision analysis to assess the environmental and economic performance of using recycled gypsum cement and recycled aggregate to produce concrete: The case of Catalonia (Spain)

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