Sun-dried bricks offer substantial carbon and embodied energy savings over fired bricks
Category: Resource Management · Effect: Strong effect · Year: 2020
Switching from fired clay bricks to sun-dried bricks can significantly reduce carbon emissions and embodied energy in construction.
Design Takeaway
Prioritize sun-dried bricks or similar low-embodied energy materials in design projects where environmental impact is a key consideration.
Why It Matters
This insight highlights a critical decision point in material selection for building projects. Understanding the environmental footprint of different brick types allows designers and engineers to make more sustainable choices, directly impacting project sustainability goals and regulatory compliance.
Key Finding
Using sun-dried bricks instead of fired clay bricks can save nearly 6 tonnes of CO2 equivalent and over 5000 MJ of embodied energy for every thousand bricks produced.
Key Findings
- Sun-dried bricks result in significantly lower carbon emissions compared to fired clay bricks.
- The embodied energy required for sun-dried bricks is substantially less than for fired clay bricks.
- A reduction of up to 5907 kg CO₂e and 5305 MJ of embodied energy per 1000 bricks can be achieved by using sun-dried bricks instead of fired bricks.
Research Evidence
Aim: What are the comparative life cycle carbon emissions and embodied energy differences between sun-dried bricks and fired clay bricks?
Method: Comparative Life Cycle Assessment (LCA)
Procedure: The study calculated the life cycle carbon emissions (LCCO2) and embodied energy for both sun-dried and fired clay bricks, considering the entire production chain from raw material extraction to final product. A case study in Egypt was used for data collection and analysis.
Context: Building materials production and construction
Design Principle
Embodied energy and carbon footprint should be primary considerations in material selection for construction and product design.
How to Apply
When specifying materials for new builds or renovations, conduct a comparative analysis of the embodied energy and carbon footprint of available options, favouring those with lower environmental impact.
Limitations
The study's findings are specific to the case study location and production methods; variations in local resources, manufacturing processes, and transportation distances could influence results.
Student Guide (IB Design Technology)
Simple Explanation: Making bricks without firing them in a kiln saves a lot of energy and reduces pollution compared to regular bricks.
Why This Matters: Understanding the environmental cost of materials helps you design more responsibly and create products that are better for the planet.
Critical Thinking: How might the cost-effectiveness and structural integrity of sun-dried bricks compare to fired bricks in different climatic conditions and building codes?
IA-Ready Paragraph: Research indicates that traditional building materials like sun-dried bricks offer significant environmental advantages over conventional fired clay bricks, with potential reductions in carbon emissions and embodied energy. This suggests that exploring and utilizing such materials can lead to more sustainable design outcomes.
Project Tips
- When choosing materials for your design project, think about how they are made and their impact on the environment.
- Research local and traditional materials that might have a lower environmental footprint.
How to Use in IA
- Reference this study when discussing the environmental impact of material choices in your design project's evaluation or justification sections.
Examiner Tips
- Demonstrate an understanding of life cycle assessment principles when evaluating material choices.
Independent Variable: Brick type (sun-dried vs. fired clay)
Dependent Variable: Life cycle carbon emissions (LCCO2), Embodied energy
Controlled Variables: Production chain stages, Case study location (Egypt)
Strengths
- Provides a quantitative comparison of environmental impacts.
- Considers the full life cycle of the materials.
Critical Questions
- What are the long-term durability and performance differences between these brick types?
- How do local regulations and market acceptance influence the adoption of sun-dried bricks?
Extended Essay Application
- Investigate the embodied energy and carbon footprint of materials used in a specific construction project or product, comparing traditional vs. modern options.
Source
A comparative study of life cycle carbon emissions and embodied energy between sun-dried bricks and fired clay bricks · Journal of Cleaner Production · 2020 · 10.1016/j.jclepro.2020.122998