EGB270 Lecture 11 - Sustainable & Advanced Materials

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Flashcards covering key vocabulary from the Sustainable & Advanced Materials lecture.

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18 Terms

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Fatigue

Repeated change in stresses over time.

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Sustainable Materials

Do not impact negatively on the natural environment and any living organism's health; resource-efficient throughout their life cycle; can be recycled/reused.

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Carbon Capture and Storage (CCS)

Captures CO2 from sources like cement manufacturing plants and stores it in locations such as saline aquifers, depleted oil and gas reservoirs, and coal beds.

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Algae-based CO2 Capture

Using CO2 as feedstock for algae, and then using the algae as agricultural feed.

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Cement Replacement

Cement replacements like Pulverised Fuel Ash (PFA/Fly Ash) or Ground Granulated Blast-furnace Slag (GGBS) which can save 850kg of CO2 for every tonne of Portland cement.

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Zero/No Cement Concrete

Concrete made using pozzolans such as volcanic ash, ground bricks, and tiles mixed with lime, as done by the Romans.

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Sustainable Aggregates

Volcanic ash, fly ash, and quarry fines heated with captured CO2.

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Manufactured Aggregate from Blast Furnace Slag

GGBS (a by-product of steel making) crushed and screened to suitable sizes.

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Recycled Concrete Aggregates

Crushed clean, sound concrete from demolition waste, used as a partial replacement (≥30%) for non-structural work.

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Manufactured Sand

Crushed rock used to replace river sand; can replace up to 60% of natural sand.

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Fly Ash based Geopolymer Concrete

Concrete based on fly ash, sodium hydroxide, and sodium silicate solution.

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Geopolymer Concrete Properties

Similar engineering properties to conventional OPC concrete, with higher tensile and bond strength, high resistance to sulphate attack, fire, and acids, and low creep and drying shrinkage.

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3D Printing of Concrete

Robotic arm attached to gantry to place concrete with zero slump, no need for shuttering or compaction; often reinforced with fibers.

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Self-Healing Concrete

Concrete that heals cracks when they form by releasing materials like microencapsulated sodium silicate.

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Dincel System

Internationally patented permanent polymer formwork for walls/columns, where reinforcement and concrete can be filled to avoid formwork.

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Mortarless Masonry

Blocks connected like Lego without any mortar, offering time efficiency, less waste, and cost-effectiveness.

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Fiber Reinforced Polymers (CFRP)

Very high tensile strength (>1500MPa) material used for strengthening concrete, wood, and steel.

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Auxetic Materials & Composites

Materials that expand laterally when elongated and contract laterally when compressed (negative Poisson’s ratio); used in blast and impact resistance applications.