Lecture Notes on Circularity and Energy Performance in Built Environment

Overview of Circularity and Energy Performance in the Built Environment

• Introduction

  • Lecture by Prof. Dr. Ir. H.J.H. Brouwers on Circularity.
  • Focus on the built environment with considerations for energy performance.

• Learning Objectives:

  • Understand the concept of circularity in architecture and construction.
  • Discuss renewable materials and their role in sustainability.

• Course/Exam Material:

  • Resources include a reader and a book titled "Materials for Architects and Builders" by A. Lyons (multiple editions available).
  • Materials and lectures are accessible through the Canvas platform.

• Course Structure:

  • Contact hours structured over 7 weeks with lectures and exercises focused on different material properties and building systems.

Detailed Planning of Lectures

• Lecture Topics:
  1. Introduction to materials and circularity
  2. Properties of building materials
  3. Insulation and heat buffering materials
  4. Use of plastics
  5. Building envelope materials
  6. Lime, gypsum, cement, and concrete
  7. Metals in construction
• Resources Covered:
  • Specific chapters from the book and reader to guide learning.

Building Requirements

• Key Characteristics to Ensure:
  • Loadbearing capabilities
  • Functional usability
  • Durability over time
  • Sound and energy insulation
  • Fire safety and comfort
  • Affordability and stable value
  • Resource efficiency and natural balance
  • Renewability and recyclability

Building Materials: Architectural Considerations

• Material Properties:
  • Topology, morphology, geometry, texture, surface, and materialization contribute to the architectural outlook and function.
• Transformation of Matter:
  • Transformation of geological or biological matter into functional building materials.

Functionality of Building Materials

• Requirements for materials:
  • Satisfy functionality and sustainability criteria.
  • Reusability and durability are essential for longevity.
  • Detailing must include aspects like thermal and acoustic insulation, fire safety, etc.

Historical Context and Evolution of Materials

• Thermal Performance in Architecture:
  • Influence of insulation from the 19th to the 20th century.
• Material Use Trends (Timeline):
  • Historical development from basic materials to advanced composites and polymers.

Most Produced Materials (2022)

• Material Volume:
  • Significant quantities of building materials:
  • Cement: 23,000 million tons
  • Concrete: 19,000 million tons
  • Steel: 4,000 million tons
  • Timber, Gypsum, Asphalt, and others also noted.

Energy Consumption in Buildings

• Energy Usage Statistics:
  • Buildings account for approximately 30% of global final energy consumption.
  • Importance of reducing energy use for sustainability.

Concept of Embodied Energy

• Definition:
  • Energy associated with material production processes, from extraction to construction.
  • Comparative data on embodied energy for various materials (e.g., timber: 8 GJ/ton, steel: 9-22 GJ/ton, concrete: 1 GJ/ton).

Circularity Gap and Strategies

• Circular Economy Principles:
  • Full utilization of existing materials and reduction of waste.
• R9 Strategies (1979):
  • Hierarchy of actions:
  1. Refuse (prevent)
  2. Reuse
  3. Recycle
  4. Recover for energy
  5. Incinerate
  6. Landfill

Waste Management Policies**

• Importance of pre-sorting waste for effective recycling in a circular economy.
  • Notable efforts in the Netherlands to maximize construction and demolition (C&D) waste recycling (95% recycling rate).

Strategic Focus on Critical Raw Materials

• Importance:
  • Several materials are crucial for technological applications and their production is geographically concentrated.

Conclusion: Recap of Key Concepts

• Understanding the essence of circularity in the built environment.
• Continuous exploration of renewable materials' potential and impacts on sustainability.