Resource Allocation & Materials Flashcards

A project team is evaluating two pipe materials for a water main: PVC and ductile iron. Which Envision-aligned approach should guide their selection?

Answer: Conduct a comparative life cycle assessment weighing embodied carbon, durability, and end-of-life recyclability

An LCA-based comparison captures the full environmental tradeoffs across the entire life of each material, aligning with Envision's holistic approach.

What is 'dematerialization' in the context of sustainable infrastructure design?

Answer: Achieving the same function using less material through optimized design

Dematerialization means right-sizing and optimizing structural elements so that less material is required to deliver equivalent performance.

Which of the following is a PRIMARY benefit of using reclaimed asphalt pavement (RAP) in new road construction?

Answer: Reduces the demand for virgin aggregate and bitumen, lowering costs and embodied energy

RAP reuses existing aggregate and residual asphalt binder, reducing the need for quarried stone and new petroleum-derived bitumen.

Under Envision's RA2.1 credit (Reduce Waste Generation), which action would earn the HIGHEST recognition?

Answer: Achieving a construction waste diversion rate of 95% or higher from landfill

Envision awards higher credit levels for demonstrating exceptional diversion rates, with the highest recognition requiring near-total diversion from landfill.

A sustainable infrastructure project uses modular precast concrete components. Which sustainability advantage does this approach PRIMARILY offer?

Answer: Reduces material waste through factory-controlled production and enables component reuse or relocation

Factory prefabrication minimizes off-cuts and overages compared to cast-in-place methods, and modular design allows components to be repurposed or relocated.

Which statement BEST describes the relationship between material durability and resource efficiency in infrastructure?

Answer: Longer service life spreads the embodied impacts of a material over more years, often reducing lifecycle environmental impact

When material impacts are amortized over a longer service life, the annual environmental burden decreases, frequently making durable choices more resource-efficient overall.

What is the purpose of a 'materials passport' in sustainable building and infrastructure design?

Answer: A digital record of material identity, location, and condition enabling future recovery and reuse

Materials passports document what materials are in a structure, supporting recovery and reuse at end-of-life rather than disposal.