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222 TRƯỜNG ĐẠI HỌC SƯ PHẠM KỸ THUẬT - ĐẠI HỌC ĐÀ NẴNG

transformative change from conventional construction This fragmentation complicates efforts to implement
toward sustainability. circular economy practices effectively. Regulatory
a) Recycling material constraints further exacerbate the situation, as existing
regulations and standards may not prioritize or
Recycling involves the recovery and processing of incentivize circular economy practices, hindering
waste materials to create new products or their widespread adoption [5]. Lastly, technological
components. In construction, various materials such limitations, such as underdeveloped recycling and
as concrete, metals, plastics, glass, and timber can be upcycling technologies, impede scalability and
recycled, thereby reducing the demand for virgin applicability in construction projects, necessitating
resources and diverting significant amounts of waste further research and development efforts. Despite
from landfills. these challenges, opportunities exist for overcoming
A notable example of successful recycling in barriers to circular economy implementation in
construction is the use of recycled concrete construction. Education and training programs can
aggregates (RCA). RCA is produced by crushing and increase awareness and understanding of circular
processing waste concrete from demolition sites into economy principles, while financial incentives,
aggregate particles that can be used as a substitute for collaborative partnerships, supportive policies, and
virgin aggregates in new concrete mixes. This not increased investment in research and development can
only conserves natural resources but also reduces the facilitate the adoption of sustainable practices and
environmental impact associated with quarrying for drive the construction industry toward a more
virgin aggregates and landfilling of concrete waste. resource-efficient future [6].
b) Upcycling material 5. CASE STUDIES
. Upcycling involves repurposing or renovating a) The Edge, Amsterdam
existing materials or structures to create new products The Edge in Amsterdam (fig .2 ) is an ideal
or components of higher value or quality. Unlike example of sustainability and innovation in the
recycling, which involves breaking down materials construction industry. This office building, completed
into raw forms, upcycling adds value by creatively in 2015, demonstrates how circular economy
transforming them into new and desirable forms principles can be effectively incorporated to build a
without significant alteration. green and resourceful structure.
An exemplary case of upcycling in construction is
the refurbishment of reclaimed timber from old
buildings or shipping pallets into furniture, flooring,
or decorative elements. By salvaging and refurbishing
timber, construction projects can incorporate unique
and aesthetically pleasing elements while reducing the
need for newly harvested timber and diverting waste
from landfills.
4. CHALLENGES AND OPPORTUNITIES
Implementing circular economy approaches in
construction recycling and upcycling encounters Source: Sustainability - PLP Architecture
several challenges and barriers. Firstly, there is a lack
of awareness and education among stakeholders Fig. 2. Edge in Amsterdam
regarding the principles and benefits of circular b) Strategies employed
economy practices. This knowledge gap hampers the Material Recycling and Upcycling: In its
willingness of organizations to invest in sustainable construction, The Edge gave priority to recycled and
methods [2]. Secondly, the initial costs associated upcycled materials. Bricks that were saved from the
with recycling and upcycling materials in construction original building on-site were reused for exterior
often outweigh those of traditional disposal methods. cladding to reduce the demand for new materials.
This financial barrier poses a significant obstacle for Moreover, timber beams retrieved during demolition
companies, as sorting, processing, and transporting phases have been renovated and used in the interior
construction waste for recycling require substantial design of the house thereby minimizing waste as well
investment [1]. Additionally, the construction as adding aesthetics.
industry's fragmented supply chains present
coordination challenges across diverse stakeholders, Materials and Construction: The construction of
including material suppliers, contractors, The Edge followed principles of sustainability, with a
subcontractors, and waste management companies. focus on using recycled and environmentally friendly
ISBN: 978-604-80-9779-0