Reusing Construction Materials

​

• Understand the global scale of construction waste

• Identify materials that can be reused

• Explore innovative reuse projects

• Develop creative solutions in groups

​

Dropdown

Construction sector generates "​

Select answer

of total waste.

Categorize

Options (10)

Concrete

Rebar

Untreated wood

Asbestos-containing materials

Chemically treated wood

Wallpapers

Insulation materials

Bricks

Wood pallets

Composite materials

Organise these construction materials.

Can be reused

Can't be reused

Design for reuse: a key element of sustainable buildings

It’s time for building design to look beyond the present and consider how materials and components of a building can be reused or recycled to make other buildings.

​Wood

High-quality salvaged beams and joists can be used for structural elements in new construction, sometimes requiring an engineer's sign-off.

​ New structures

Reclaimed wood can be re-milled to create new flooring or decking, restoring its surface for these uses.

​ Flooring and Decking

Tables, chairs, bookshelves, and cabinets can be made from salvaged wood.

​ Furniture

Old wood from historic buildings can be used for unique features in modern decor.

​ Decorative Features

Smaller wood scraps can be made into composite products like particleboard.

​ Composite Materials

Wood that is composted becomes a valuable soil amendment, which conserves water and reduces erosion.

Mulch and Compost

Open Ended

What needs to be done to reuse an old wooden structure?

​ Concrete and bricks

Crushed and sorted concrete and brick can be used as aggregate in new concrete and asphalt, or as a base material for roads and pathways.

​

​Recycling into aggregates

Crushed materials or larger pieces can be used for rock gardens, mulch, or decorative landscaping features. ​

​Landscaping

Larger pieces of concrete can be used as fill material, while crushed bricks can serve as drainage media

​Foundation or Drainage

Large pieces of concrete can be used to fill wire cages to create retaining walls or protect shorelines

​Gabion walls

Intact bricks can be used for building walls, planters, or decorative features

​Whole brick use

Ground bricks can be used for various garden projects or as a component in new mortar mixes

​Crushed brick products

Open Ended

What method would you choose to reuse concrete and bricks?

​ Metals

Intact structural elements, like beams and columns, can be removed and used in entirely new constructions after being certified for their structural properties.

Structural Reuse

Components can be re-fabricated and used as standard elements in new buildings.

​Component Reuse

Open Ended

What other ways can you name how an old metal structure can be used?

​ Material Reuse Challenges

High costs: Deconstruction, transportation, and reprocessing of materials can incur significant upfront costs, often making reused materials more expensive than new ones.
Lack of incentives: Insufficient economic incentives and a lack of measurable financial benefits for reuse hinder adoption by clients and businesses.
Market immaturity: A lack of a professional, efficient, and standardized reuse market makes it difficult for suppliers and buyers to connect, leading to inconsistent supply and demand.

​

​Economic Challenges

Performance uncertainty: There is often skepticism and uncertainty about the performance and reliability of reused materials, which limits their application in structural and critical areas.
Contamination and quality issues: Adhered mortar, impurities, and poor quality can reduce the structural integrity and durability of reclaimed materials.
Lack of tracking and documentation: A lack of advanced marking, identification, and tracking systems for materials makes it difficult to access their history and technical specifications.

​

Technical & Material Challenges

Inadequate or rigid regulations: Inadequate policies, overregulation, and rigid building codes can hinder the use of reused materials, particularly for fire safety or structural integrity.
Lack of standardization: A lack of standard practices for identifying, reporting, and testing reusable materials makes it difficult for contractors and engineers to incorporate them into projects.

​

Regulatory & Policy Challenges

Identify 5 building materials from school building, which can be used when building a country house. Describe how it can be done.

Group task: