Circular construction in practice Report synopsis Public opinion - - PowerPoint PPT Presentation

Circular construction in practice

Report synopsis

Public opinion is unaware

• f built environment

externalities

Construction sector in the European Union:

Expends

1.8 billion tones

• f raw materials

(25% of total demand)

Generates

0.8 billion tones

• f waste

(36% of total waste)

Uses

40% of total

Energy demand

(mainly for heating purposes)

Is responsible for

36%

• f total CO2 emission

The construction sector is bound for circular model application

There is less and less construction materials reusage Buildings’ durability decreases Non-renewable materials are used to ever greater extent

The development of the construction sector took a wrong turn in XX century

Switch from steel and construction wood to concrete

• Ca. 1945

Modification in concrete composition that allows faster but less durable construction

• Ca. 1975

Decreased renovation possibilities in result of hiding structural elements under panels or façades

• Ca. 1990

Cement usage

4.5 billion tones

US 1901 - 2000

6.6 billion tones

China 2011 - 2013

The effects of those developments are still felt today

Change in gross value added per hour worked in construction sector (in %, constant prices)

FRANCE POLAND EUROPEAN UNION

In the current model the investor and the owner are seperate entities. The investor’s natural myopia in cost considerations is not counterbalanced by the

• wners’ demands due to

asymmetry of information.

Current construction financing model hinders circular concepts’ adoption

By 2030 increasing construction durability, maximising the value of buildings and their parts and using resources optimally can bring benefits for the EU countries valued at

• ver 1 Billion EUR

Circular production lacks economies of scale

Governments have not kept proper track of construction waste

Good quality Modes quality Bad quality

Quantity of waste Waste treatment

Quality of data on construction and demolition waste in European Union

There still is a negative perception

• f reusing

construction materials

Ranking Barrier

1 Architects and design engineers do not consider recycled materials and products during project design and specification 2 Lack of positive perception from clients who drive project process 3 Uncertainty on whole life durability of recycled materials and products

4

Materials selection and specification are influenced by cost rather than environmental benefits

5

Recycled Materials and products are more expensive than expected due to perceived environmental friendliness

6

Building control hindering the use of recycled materials

7

Suppliers' websites lack substantial product information

8

Recycled materials product information is difficult to find

9

Difficult to find suppliers of Recycled materials

10

There is inadequate education about recycled materials and products in schools

11

Samples of Recycled materials are difficult to obtain

12

Industry professionals are not versed enough on recycled materials and products

13

Recycled materials does not always meet projects needs and quality requirements

14

Supply of recycled materials is not always of the same quality

15

Market supply of recycled materials is not always reliable 16 There is a perceived culture among construction professionals that Recycled materials and products are inferior

17

Level of recycled contents in products is not always clear and easy to find

18

Legislation prevents the use of Recycled Products and Materials

19

Lack of tax breaks for contractors

Public authorities can play a vital role in attaining economies of scale

• 5,00

10,00 15,00 20,00 25,00 Netherlands Finland Slovak Republic Japan Hungary Sweden Germany New Zealand France Czech Republic Belgium Israel Denmark Estonia Norway Iceland Austria Canada Slovenia OECD - Average Australia United Kingdom Korea Poland Latvia Luxembourg OECD - Total Greece Turkey Lithuania Spain Italy Portugal United States Switzerland Ireland Mexico

Public procurement in 2015 (in % of GDP)

In 2017 Life-cycle assessment

was considered in 17 cases in 139133 public procurement processes in Poland, i.e. it was used in 0.01% of all cases

Public sector has the potential to ignite construction innovation

Sources of innovation in built environment Construction innovation impact of procurement practices

Integrated energy management programme in Italy required providers to increase heating efficiency in public buildings, proofs

• f which have been independently
• examined. In result of the project the

heating expenses at over 5 thousand buildings have decreased by 27%. Standardization and outcome-based approach is essential for a swift circular concept implementation

Barriers for innovation in the construction sectro, in the context of public procurement

Decreasing asymmetry of information should supplement other actions

This concerns in particular: Durability Costs Externalities Energy efficiency Additionally nudging the consumer by framing the information could be valuable.

Cooperation is essential for the circular model to work properly

SYNERGY

Synergy effects could be attained by using circular business models

Circular Construction is not achievable without appropriate technologies

Building Information Modelling and Material Passports

Digitalization in construction sector concerns e.g.:

Augmented reality 3D printing

Digitalization is essential in the process of circular model implementation

increasing durability and value in the lifecycle Construction digitalization enables i.a.: easier modifications and multifunctionality better resource efficiency decreasing waste and increasing reusage

Digitalization enables modularity and adaptability

Recycling of materials previously considered unrecyclable Using by-products of

• ne industry in other

sectors Highly recyclable materials that are themselves made from recyclate or natural materials

Recycling solutions and industrial symbiosis seem to develop quickly

Flooring materials that have self-healing properties and are 100% recyclable Enhanced styropor, offering up to 20% efficiency improvement in insulation Organically coated steel that achieves 30-year guaranteed durability and does not contain genotoxic, hexavalent chromium Self-healing concrete, generated through the addition of bacterial spores, is estimated to reduce lifetime costs by up to 50% Rain-absorbing roof-mats, imitating the process of perspiration, considerably reduce air-conditioning costs

New material technologies in line with circular economy concept

The switch to circular construction is imminent and it will benefit us all

• The construction sector has been and

is predestined to use circular economic model

• In XX century we have forgotten about that,

leaning towards linear construction

• Switching once again to circular solutions may

reap immense benefits not only for the economy but also the environment, as construction is the most polluting sector of all

• The role of public authorities

is quintessential in this aspect.

• New business models, innovations and

technologies may quicken this process

Thank you!