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SUSTAINABILITY IN CONSTRUCTION

Dr Adewale Abimbola, FHEA, GMICE.

www.edulibrary.co.uk

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Aim: Sustainability in Construction.�Objectives: At the end of the lesson, the students should be able to:

  • Link construction/civil engineering activities to specific United Nations Sustainable Development Goals (UNSDGs).
  • Explain environmental, economic, and social sustainability.
  • Explore how the construction industry reflects environmental, economic, and social sustainability.

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Learning Outcome and Assessment Criteria

P3. Explain the different types of sustainability and how the construction industry is reflected in these.

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INTRODUCTION������

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    • The 1972 United Nations Conference on the Human Environment in Stockholm was the first world conference to make the environment a major issue. 26 principles for sustainable development was outlined (United Nation, 1973).

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INTRODUCTION

Other Important International Agreements on Climate Change (Maizland, 2023)

  • Montreal Protocol, 1987 – All countries to stop the production of chlorofluorocarbons (CFCs). The Kigali Amendment to the Montreal Protocol is an international agreement in 2016 to gradually reduce the production of hydrofluorocarbons (HFCs).
  • UN Framework Convention on Climate Change (UNFCCC), 1992 - It established the Conference of the Parties, or COP, an annual international forum aimed at stabilising the concentration of greenhouse gases in the atmosphere.
  • Kyoto Protocol, 2005 - First legally binding climate treaty. It required developed countries to reduce emissions by an average of 5% below 1990 levels, and established a system to monitor countries’ progress. No commitment for developing nations, including China and India. The United State later withdrew its signature.
  • Paris Agreement, 2015 - All countries to set emissions-reduction pledges. known as Nationally Determined Contributions (NDCs). This is to prevent the global average temperature from rising 2°C above preindustrial levels, and pursuing efforts to keep it below 1.5°C.

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UNITED NATIONS SUSTAINABLE DEVELOPMENT GOALS (UN SDGS)

Introduction

  • The United Nations Sustainable Development Goals (SDGs) were adopted in 2015 as part of the 2030 Agenda for Sustainable Development by 193 UN member states (UN, 2015).
  • There are 17 goals and 169 targets, forming an integrated framework for global prosperity, environmental protection, and social inclusion (United Nations, 2015).
  • The SDGs succeeded the Millennium Development Goals (MDGs) (2000–2015), expanding their scope beyond poverty, health, and education, to include sustainability, equality, and climate resilience (Institution of Civil Engineers, 2025).
  • In 2015, there was the adoption of the 2030 Agenda: Formal establishment of the 17 SDGs at the UN Sustainable Development Summit, New York (United Nations, 2015).

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UNITED NATIONS SUSTAINABLE DEVELOPMENT GOALS (UN SDGS)

Which of the sustainable development goals (SDGs) does your job currently achieve or support?

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THE ROLE OF CIVIL ENGINEERS IN ACHIEVING SDGS

  • Infrastructure Delivery: Engineers ensure that projects meet social and environmental performance metrics while supporting community resilience (American Society of Civil Engineers, 2023).
  • Technological Innovation: Adoption of AI, digital twins, and data-driven design to optimise energy and resource efficiency (ECT, 2025).
  • Collaborative Design: Working across disciplines to integrate sustainability principles from planning to decommissioning.
  • Educational Commitment: Embedding SDG content within engineering education and practice to train future engineers in sustainable development approaches.

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QUIZ

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THE UK SUSTAINABLE DEVELOPMENT STRATEGY������

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    • The UK Sustainable Development Strategy recognises that humans have a right to healthy and safe environment. They set out principles to ensure this is achieved (Sustainable-environment, 2018):
    • Pollution reduction: use of renewable resources, climate action, sustainable transportation, waste management, clean water and sanitation, etc.
    • Poverty reduction and social inclusion: reduced inequality, zero hunger, gender equality, quality education, peace, justice and strong institutions.
    • Improved quality housing; good health and well-being,
    • Reduced unemployment; sustainability-focused industry, innovation, etc.
    • How are they being implemented?
    • Click here.

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SUSTAINABILITY������

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    • Sustainability is the responsible utilisation of resources with consideration of their impacts on current and future generations.
    • The short-term and long-term impacts of resources or materials used in the construction industry are assessed at the pre-construction stage of the projects.
    • Sustainability can be classed in three ways:
    • Environmental sustainability
    • Economic sustainability
    • Social sustainability

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ENVIRONMENTAL SUSTAINABILITY CONSIDERATIONS�������

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  • Natural Resources�Construction consumes vast amounts of finite natural resources, such as timber, minerals, and water.
  • Unsustainable resource extraction can lead to depletion and ecosystem disruption.
  • Use of recycled materials reduces the demand for virgin resources.

Natural Habitat

  • Construction often leads to the destruction of natural habitats.
  • Urban sprawl can displace wildlife and disrupt ecosystems.
  • Mitigation measures like reforestation and habitat preservation can enhance and protect biodiversity.

Pollution

  • Construction activities release pollutants into the air, soil, and water.
  • Air pollution from construction machinery and dust can harm human health.
  • Noise, fuel usage and associated carbon emissions from the construction machinery impacts negatively on the environment.
  • Sustainable practices, such as dust control and low-emission equipment, improve air quality.

Climate Change

  • The construction industry contributes to greenhouse gas emissions.
  • Energy-intensive construction processes and transportation add to the carbon footprint.

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ENVIRONMENTAL SUSTAINABILITY CONSIDERATIONS�������

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Land Use (Greenfield and Brownfield Sites)

  • Construction on greenfield sites involves converting undeveloped land.
  • It contributes to urban sprawl, loss of farmland, and increased commuting.
  • Redeveloping brownfield sites (previously developed) can be more sustainable.
  • It reduces pressure on greenfield areas and promotes urban renewal.

Waste

  • Construction generates large amounts of waste, including debris, packaging, and unused materials.
  • Proper waste management is crucial for sustainability.

Energy Usage

  • Construction requires energy for building materials, machinery, and transportation.
  • Energy-efficient construction practices can mitigate this impact.

Water Usage

  • Construction projects often require significant water for concrete mixing and dust control.
  • Sustainable water management practices (Sustainable Urban Drainage Systems) can minimise water usage.
  • Proper sediment and runoff management protect water quality.

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ECONOMICS SUSTAINABILITY CONSIDERATIONS�������

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Project Costs

  • Optimise life cycle economic performance.
  • Efficient cost management is essential to ensure economic sustainability.

Financial Returns

  • Successful construction projects can yield significant financial returns.
  • Investments in construction contribute to economic growth and development.

Employment Opportunities

  • Construction creates job opportunities for a diverse range of skills.
  • It supports livelihoods and local economies.

Training Opportunities

  • Construction projects often provide training and skill development programs.
  • This enhances the employability of the workforce.

Increased Value Over Time

  • Well-constructed and maintained projects can appreciate in value.
  • This contributes to long-term economic sustainability.

Reduced Running Costs

  • Sustainable construction practices can lead to reduced operating and maintenance costs.
  • Lower costs contribute to economic sustainability over the project's lifecycle.

Government Requirements

  • Governments often impose regulations and standards for construction sustainability.
  • Compliance with these requirements is essential for project approval and sustainability.

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SOCIAL SUSTAINABILITY CONSIDERATIONS�������

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Consultation (Community Involvement)

  • Engaging the local community in construction planning and decision-making is essential.
  • Consultation ensures that community needs and concerns are addressed.

Sustainable Development

  • Sustainable construction contributes to community well-being.
  • It promotes environmentally-friendly practices and responsible resource use.

Lowering Crime Rates and Vandalism

  • Thoughtful construction and urban planning can create safer environments.
  • Well-lit, well-designed spaces deter criminal activity and vandalism.

Minimise Strain on Local Utility Infrastructure

  • Construction projects must consider the impact on local utilities like water and electricity.
  • Sustainable construction aims to reduce strain on these resources.

Appealing Development

  • Aesthetically pleasing construction enhances the local environment.
  • It fosters a sense of pride and identity within communities.
  • It fosters vibrant, connected, and inclusive communities.

Improved Quality of Life

  • Construction can improve the overall quality of life for residents.
  • Access to amenities, green spaces, and community hubs enhances well-being.

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DESIGN

Passive design strategies (Fig. 1).

Passivhaus principles (Fig. 2).

Building information modelling (Fig. 3).

Whole-life cycle perspective.

EAST (Easy, Attractive, Social, Timely) principles (Fig. 4)

Sustainable Building Design

Figure 1. Passive design strategies (Archi-monarch, 2019)

Figure 2. Passivhaus principles (Sifferlen, 2017)

Figure 3. Building Information Modelling (Pbctoday, 2018)

Figure 4. EAST principles (The Social Deck, 2020)

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SUSTAINABLE SITE PRACTICES�������

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Appropriate Material Storage

Storing construction materials in designated areas to prevent soil contamination and ensure easy access.

Silt Traps

Installing silt fences and sediment ponds to capture sediment runoff and protect nearby water bodies.

Dust Reduction

Using dust control measures like water spraying or dust suppressants to minimise airborne particles.

Waste Segregation

Implementing on-site waste sorting to separate recyclables, hazardous waste, and general waste.

Recycling Materials

Reusing or recycling construction materials like concrete and metal to reduce landfill waste.

Protecting Natural Habitat

Creating wildlife corridors and buffer zones around construction sites to preserve local ecosystems.

Protecting Water Bodies

Installing sediment control barriers and erosion control measures to prevent water pollution.

Tree Protection

Fencing off trees and using root protection measures to safeguard existing vegetation.

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Alternative Construction methods:

    • Timber framing system – composite components (Fig. 5);
    • Modularisation/componentisation (Fig. 6);
    • Low-carbon infrastructure;
    • Carbon fibre;
    • Cladding;
    • Hempcrete;
    • retrofitting/adapting existing features/reusing;
    • 3D printing.
    • Etc.

Sustainable Construction

Figure 6. Prefabrication (McGraw-Hill Construction, 2011)

Figure 5. Structural Insulated Panel (Trinity Building Systems, 2021)

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BENEFITS OF SUSTAINABLE CONSTRUCTION SOLUTIONS

  • Reduced energy bills for homeowners and businesses.
  • Enhanced indoor comfort and well-being due to effective insulation and ventilation.
  • Positive effects on our health. Phasing out the burning of fossil fuels will bring down air pollution levels.
  • Enabling changes like these will lead to healthier people and cost savings for healthcare systems like the NHS.
  • Energy-efficient buildings have higher property values and market demand.
  • Job creation in construction, renovation, and retrofitting sectors.
  • Incentives for adopting energy-efficient practices and technologies

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LIMITATIONS OF SUSTAINABLE CONSTRUCTION SOLUTIONS

  • Initial investment costs offset by long-term savings and benefits.
  • Need for skilled labour and workforce training in energy-efficient techniques.
  • Accessibility issues for low-income individuals and communities.
  • Risk of perpetuating socio-economic disparities.
  • Retrofitting existing structures can be complex and costly.
  • Structural limitations and disruption during retrofitting processes.
  • Return on investment for energy-efficient features might be gradual.
  • Sourcing and disposal of eco-friendly materials can pose challenges.
  • Rapid technological advancements may make current solutions obsolete.

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SELF-ASSESSMENT TASK

1. Define the following types of sustainability:

  • Environmental sustainability.
  • Economic sustainability.
  • Social sustainability.

2. Discuss at least THREE ways each in which the construction industry reflects environmental, economic, and social sustainability.

[Refer to practices employed by specific/various construction companies].

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REFERENCES/BIBLIOGRAPHY