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Related Concept Videos

Design Consideration01:22

Design Consideration

237
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
237
Design Example: Sustainability in Concrete Building01:26

Design Example: Sustainability in Concrete Building

203
As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
203
Design Example: Distributing Reinforcements in Concrete Sections01:22

Design Example: Distributing Reinforcements in Concrete Sections

123
The topic explores the practical aspects of adjusting steel reinforcements within a concrete beam section to meet specific design requirements. When designing a reinforced concrete beam, it is essential to distribute the steel reinforcements properly to ensure structural integrity and efficiency. The example provided details a scenario where a beam requires a total steel cross-section of 4 square inches. The engineer identifies that the available steel bars have a nominal diameter of 1.693...
123
Deleterious Substances in Aggregate01:25

Deleterious Substances in Aggregate

221
Deleterious substances in aggregates can be detrimental to the quality and durability of concrete. These substances include organic impurities like loam, which interfere with cement hydration and are usually present in the sand. These prevent a good bond between aggregate and cement paste. Organic impurities can be detected using the colorimetric test, where the darkness of a solution after agitation indicates the level of organic content.
Another type of impurity is clay and fine material that...
221
Design Example: Dimensioning of Concrete Masonry Construction01:13

Design Example: Dimensioning of Concrete Masonry Construction

133
For the construction of a storeroom using concrete masonry units, it's essential to align the dimensions of the structure with the actual sizes of the blocks and the intended mortar joints. On the site in question, there's a stockpile of concrete masonry blocks with a nominal size of eight by eight by sixteen inches, which are to be used in the construction of the storeroom.
The site engineer has laid out a plan for the storeroom with external dimensions of twelve feet in length and...
133
Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

104
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
104

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The Effect of Construction and Demolition Waste Plastic Fractions on Wood-Polymer Composite Properties
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Stakeholder perceptions on implementing design for disassembly and standardisation for heterogeneous construction

Kostas Anastasiades1, Joos Dockx1, Marc van den Berg2

  • 1Department of Energy and Materials in Infrastructure and Buildings, Faculty of Applied Engineering, University of Antwerp, Antwerp, Belgium.

Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA
|April 13, 2023
PubMed
Summary

Circular economy principles promote construction component reuse over recycling. Developing standardized components and procedures, alongside a legal framework, is crucial for widespread adoption, according to industry stakeholders.

Keywords:
Circular economydesign for disassemblyreusestandardisationsystems thinkingwaste management

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Area of Science:

  • Construction Management
  • Circular Economy
  • Sustainable Building Practices

Background:

  • Component reuse in construction offers higher value within a Circular Economy (CE) framework compared to recycling.
  • Significant barriers hinder the widespread adoption of construction component reuse.
  • Existing standards like ISO20887 highlight the need for construction standards to facilitate circular reuse, but development is ongoing.

Purpose of the Study:

  • To investigate the current implementation of Design for Disassembly (DfD) and component reuse in the construction sector.
  • To understand industry perspectives on how standardization of components, connections, and procedures can enhance reuse.
  • To identify actionable steps and responsible stakeholders for advancing circularity in construction.

Main Methods:

  • A survey was distributed to the Green Deal on Circular Construction (GDCC) network (n=629, response rate=16%).
  • The survey assessed current practices in Design for Disassembly and component reuse.
  • Respondents' views on the impact of morphological and procedural standardization on reuse were collected.

Main Results:

  • Stakeholders identified a lack of a legal framework as a major impediment to component reuse.
  • Industry professionals believe that large-scale cooperation is essential for creating the necessary construction standards.
  • The study yielded a set of concrete action points and identified key actors for implementation.

Conclusions:

  • The development and implementation of construction standards are vital for enabling the circular reuse of components.
  • A collaborative effort among stakeholders is required to establish a supportive legal framework for component reuse.
  • Standardization in design (DfD), component morphology, connections, and procedures are key facilitators for a circular construction sector.