Short answer

Prioritize the use of SCMs and ENMs in concrete formulations to achieve significant environmental benefits and consider recycled aggregates to further reduce reliance on virgin resources.

Field: Resource Management
Source: AIMS environmental science (2020)
Method: Comparative environmental and structural performance assessment
Evidence: Strong effect

Replacing a portion of ordinary Portland cement with supplementary cementitious materials (SCMs) and engineered nanomaterials (ENMs) significantly lowers the global warming impact and energy demand of concrete production without compromising structural performance. This resource management research insight is drawn from a 2020 study published in AIMS environmental science. Using Comparative environmental and structural performance assessment, researchers explored how this design variable affects real-world outcomes. The key design takeaway: Prioritize the use of SCMs and ENMs in concrete formulations to achieve significant environmental benefits and consider recycled aggregates to further reduce reliance on virgin resources.

Study

Resource ManagementHigh ImpactStrong effect

Incorporating SCMs and ENMs in Concrete Reduces Environmental Footprint

AIMS environmental science · 2020

Key Findings

01Use of SCMs and ENMs reduces the Global Warming Impact (GWI) and Cumulative Energy Demand (CED) of concrete.
02SCMs and ENMs do not reduce, and sometimes enhance, concrete strength and durability.
03Using construction and demolition waste as aggregate replacement reduces the demand for virgin materials.
04Trade-offs exist: re-engineered by-products can increase GWI and CED despite performance improvements.

Application

Design takeaway

Prioritize the use of SCMs and ENMs in concrete formulations to achieve significant environmental benefits and consider recycled aggregates to further reduce reliance on virgin resources.

How to apply

When specifying concrete for a design project, investigate and specify the inclusion of SCMs (like fly ash or slag) and consider incorporating recycled aggregates from demolition waste where appropriate and permitted by performance requirements.

Project actions

01Research local availability of SCMs and recycled aggregates.
02Consider the lifecycle assessment of different concrete mixes.

Method & Evidence

AimTo assess the environmental impacts and structural performance of concrete when using supplementary cementitious materials (SCMs) and engineered nanomaterials (ENMs) as partial replacements for ordinary Portland cement, and construction and demolition waste as a partial replacement for natural aggregate.

MethodComparative environmental and structural performance assessment

ProcedureThe study involved evaluating the Global Warming Impact (GWI) and Cumulative Energy Demand (CED) of concrete mixes incorporating SCMs and ENMs. Additionally, the compressive strength and durability of concrete using recycled aggregates from construction and demolition waste were tested.

ContextConstruction materials science and environmental engineering

Variables

IV["Type and percentage of SCMs/ENMs used as cement replacement","Type and percentage of recycled aggregate used as natural aggregate replacement"]

DV["Global Warming Impact (GWI)","Cumulative Energy Demand (CED)","Compressive strength","Durability"]

CV["Type of cement (e.g., Ordinary Portland Cement)","Aggregate type (for control mix)","Water-cement ratio","Curing conditions"]

Strengths & Limitations

Strengths

+Addresses critical environmental issues in a widely used material.
+Evaluates both environmental and structural performance.

Limitations

The availability and consistency of recycled materials can be a challenge; detailed environmental data for specific SCMs and ENMs may be required.

Reliability & validity

Reliability could be improved by using multiple samples for each mix and standardizing testing procedures. Validity is supported by comparing against established environmental metrics (GWI, CED) and standard structural tests (compressive strength, durability).

Think critically

How can the industry ensure the consistent quality and performance of concrete when incorporating a high percentage of recycled or by-product materials?

Design Principles

"Sustainable material substitution in composite manufacturing."

This research offers a practical pathway for the construction industry to mitigate its substantial environmental impact. By adopting these material substitutions, designers and engineers can contribute to reducing greenhouse gas emissions and conserving non-renewable resources, aligning with growing demands for sustainable building practices.

What This Means for Your Design

Using certain industrial by-products and recycled materials in concrete can make it much better for the environment without making it weaker.

How to use in your project

1.Use findings to justify material choices for a sustainable design project.
2.Reference the environmental benefits of SCMs and recycled aggregates in the design rationale.

Add to My Project

Quick Cite

Paragraph starter

The environmental assessment of concrete incorporating supplementary cementitious materials (SCMs) and engineered nanomaterials (ENMs) demonstrates a significant reduction in Global Warming Impact (GWI) and Cumulative Energy Demand (CED) without compromising compressive strength or durability. Furthermore, the use of construction and demolition waste as aggregate replacement conserves virgin resources. These findings support the integration of sustainable material substitutions in concrete design to mitigate environmental impact.

Source

AIMS environmental science

Environmental assessment of supplementary cementitious materials and engineered nanomaterials concrete

journal · 2020

View source

Questions About This Research

What does the research say about incorporating scms and enms in concrete reduces environmental footprint?: Prioritize the use of SCMs and ENMs in concrete formulations to achieve significant environmental benefits and consider recycled aggregates to further reduce reliance on virgin resources. Evidence: AIMS environmental science (2020).
Why does "Incorporating SCMs and ENMs in Concrete Reduces Environmental Footprint" matter for design?: This research offers a practical pathway for the construction industry to mitigate its substantial environmental impact. By adopting these material substitutions, designers and engineers can contribute to reducing greenhouse gas emissions and conserving non-renewable resources, aligning with growing demands for sustainable building practices.
How can designers apply this research?: Prioritize the use of SCMs and ENMs in concrete formulations to achieve significant environmental benefits and consider recycled aggregates to further reduce reliance on virgin resources.
What were the main findings?: Use of SCMs and ENMs reduces the Global Warming Impact (GWI) and Cumulative Energy Demand (CED) of concrete.. SCMs and ENMs do not reduce, and sometimes enhance, concrete strength and durability.. Using construction and demolition waste as aggregate replacement reduces the demand for virgin materials.. Trade-offs exist: re-engineered by-products can increase GWI and CED despite performance improvements.
What research method was used?: Comparative environmental and structural performance assessment.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2020 journal from AIMS environmental science.
What should I do differently in my next project?: When specifying concrete for a design project, investigate and specify the inclusion of SCMs (like fly ash or slag) and consider incorporating recycled aggregates from demolition waste where appropriate and permitted by performance requirements.
What are the limitations?: Potential trade-offs between environmental benefits and increased GWI/CED when using certain re-engineered by-products; specific performance of recycled aggregates may vary based on source and processing.