sustainability in the Middle East climate using precast concrete - - PowerPoint PPT Presentation

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sustainability in the Middle East climate using precast concrete - - PowerPoint PPT Presentation

Mar 31, 2024 317 likes •1.18k views

Maximising durability and sustainability in the Middle East climate using precast concrete Welcome Why sustainability? The Middle East has five per cent of the world's population but only one per cent of the water. Source: World

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Maximising durability and sustainability in the Middle East climate using precast concrete

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ابحرم

Welcome

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Why sustainability?

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The Middle East has five per cent of the world's population but only one per cent of the water.

Source: World Bank

Every day the worldwide economy burns an amount of energy the planet required 10,000 days to create - the stored solar energy is burned and released by utilities, cars, houses, factories and farms.

Source: Paul Hawken, The Ecology of Commerce
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What is the environmental impact of buildings?

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39% of energy use

  • 80–85% operational

energy during lifetime

  • 70% reductions possible
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solar reflective paints reduce heat by 50%

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12% of water use

  • 50-60% reductions possible
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Recycle greywater . . . and use it for

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irrigating gardens with 100% greywater to supply all irrigation and save 30% of water total household use

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Rooftop gardens

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68% of total electricity use

  • Energy conservation has twice the

financial return of renewables

  • Alternative energy creation
  • Electrical efficient design
  • Insulation
  • Passive design
  • Natural lighting
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  • Lighting

consumes 19%

  • f the world’s

electricity

  • Eco bulb’s use

80% less power

  • Integration with

good daylighting design can reduce this a further 50%

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38% of carbon emissions

  • Reduction of energy use
  • Reduction of water use
  • Reduction of electricity use
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A thought . . .

  • Buildings mortgage the

energy and environmental future

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start searching for

sustainability

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IMAGINE a building system

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that makes building

as simple as LEGO

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Green Precast Systems

Stack complete “wall and ceiling” precast components one at a time

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Green Precast Systems

Up to 2 times faster than other precast

systems with modular room sized units stacked 5 stories high in a day

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factory fit out

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factory fit out

Windows & door frames cast in

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factory fit out

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factory fit out

First fit electrical & MEP

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  • Painting
  • Balustrades
  • Floor polishing
  • Kitchens & Bathrooms

factory fit out

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  • Painting
  • Balustrades
  • Floor polishing
  • Kitchens & Bathrooms

factory fit out

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Large multi story projects

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Multi story comparison

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Multi story comparison

Green Precast Systems Tilt Slab

  • ne lift per module

many lifts no props many props no formwork formwork required safe working platform no working platform few joints many joints 4-5 floors per day 1-2 floors per day less materials (5-25%) inflexible material qty

Multi storey comparison

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Multi storey comparison

Green Precast Systems Tilt Slab

  • ne lift per module

many lifts no props many props no formwork formwork required safe working platform no working platform few joints many joints 4-5 floors per day 1-2 floors per day less materials (5-25%) inflexible material qty

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. . . contemporary townhouses

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. . . and villas

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Al Ghadeer prototype villa

Construction January 2009

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Al Ghadeer (ground & 1st floor)

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Al Ghadeer (module placement)

6x4m

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Al Ghadeer (module placement)

6x4m

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Al Ghadeer (module placement)

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Al Ghadeer (module placement)

6x3m 6x4m

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Al Ghadeer (module placement)

6x3m 6x4m

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Al Ghadeer (module plans)

6x3m 6x4m

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Al Ghadeer (additional internal walls)

6x3m 6x4m

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Al Ghadeer

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Green Precast Systems can be specified and designed into a project to the benefit of the environment and the project’s bottom line

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Concrete lasts thousands of years

The earth’s resources are best conserved if the service life

  • f a building is

prolonged, so the durability and longevity of concrete makes it an ideal choice.

Photo: the Pantheon the largest Roman concrete structure
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Life Cycle of Green Precast Systems The embodied energy of concrete is high yet it has a very long life and is low maintenance When the embodied energy resources used to maintain it over this time are divided in to its operational life it is highly sustainable compared with other materials

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No formwork

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Reduced site

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Waste onsite is not lost . . .

…it often never even appears …up to 90% reduction from Green Precast Systems

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relocatable

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recyclable

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  • High tech mould 12-24 hour cycle
  • Cast in doors, window frames and MEP
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Re-usable forms

Forms have a long life span Re-use of forms reduces waste and debris at the job site. Construction sites are cleaner, neater and quieter

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up to 70% labour savings on installation

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up to 50% faster construction times

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Speed > velocity of capital invested

  • Significant advantage of speed is that

capital invested is returned in up to half the time

  • Less risk of liquidated damages on late

delivery of projects

  • Income stream much sooner
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Less materials

Monolithic construction uses 5-25% materials to achieve the same strength

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  • for sustainability initiatives
  • at no extra cost to the project
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Sustainability Design Considerations

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Efficient Building Modules

An efficient building is one that integrates and optimises insulation levels, glazing, shading, thermal mass, air leakage control, and UV reflective exterior surfaces to minimise heat gains. Green Precast Systems achieve this.

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Sustainability & Green Precast Systems

A sustainable building lies in long- life, adaptable, low- energy design All features of Green Precast Systems

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Reducing operational energy

  • High reflectivity
  • Thermal mass
  • Insulation
  • Shading
  • Interior air quality
  • Durability
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Cooler communities

 Reflective precast concrete can moderate the heat island urban effect  “Cool” roofs and walls have proven to lower the need for a/c up to 50%  Solar reflective paints can increase this efficiency. Green Precast Systems paints have the highest reflectivity in world. Available to wider market.

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Thermal Mass

Use thermal mass in combination with insulation Thermal mass with insulation provides energy benefits that exceed the benefits of mass or insulation alone

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Thermal mass

By storing and releasing the energy needed for cooling, concrete's thermal mass delivers year- round energy benefits by reducing temperature swings in buildings. Thermal mass impacts the size of HVAC systems. Thermal mass can reduce energy for cooling by up to 50%.

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Insulation

Heat Energy Warm Air Cool Air

Improving wall and roof assembly performance

Energy transfer is minimized by wall design: Add insulation Add mass Minimize thermal bridging Minimize infiltration & exfiltration Control moisture

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Insulation

Sandwich core insulation

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Insulation

Cement render finish Reinforcing mesh Fire proof polystyrene

  • External Insulation System
  • Abu Dhabi municipality approved
  • Applied externally to modules for

thermal mass benefit and rendered

Save Energy Costs up to 40%!

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Window treatments

  • verhang

double skin

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Shading

Deep recessed windows allow indoor daylighting without heat buildup Double and insulating glazing reduce heat transfer through glass

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Shading

The inclusion of shading over windows can greatly reduce heat gain and air con use.

Photo: Photovoltaic awnings over windows
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Indoor air quality

Indoor environmental quality Excellent sound and fire protection and high thermal mass touch on every aspect

  • f sustainable design as well as the

important aspect of increased consideration for people’s health and safety

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Indoor air quality

People spend up to 90% of their time indoors.

The simple lines and smart edges of Green Precast Systems are easy to keep clean. Concrete is an inert substance so it doesn’t give off any gasses, toxic compounds or volatile organic compounds.

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Durability

Fire resistance Because precast concrete is non- combustible – it does not require additional fire- proofing applications. 1-2 hour fire rated.

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Durability

Corrosion Resistance  Quality control in manufacture  40+Mpa concrete less porous  Vibration reduces air content  Waterproof -painted or rendered with Green Precast products

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Durability

Inedible to Vermin & Insects

  • Vermin and insects cannot destroy

concrete because it is inedible.

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How to achieve Sustainable Design

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The complexity of sustainability

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Evolution of holistic design

No focus on sustainability outcomes

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Evolution of holistic design

Focus on sustainability from their perspective

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Evolution of holistic design

Group defines sustainability outcomes they wish to achieve, defines links and

  • pportunities. Require high degree of ongoing

communication.

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Sustainability cost-effectiveness

Good design produces cost neutral

  • utcomes

Holistic design must be undertaken at

  • utset of project to achieve this

Stages in design effort Level of effort Level of effort Opportunities to implement cost effective integration

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كل اركش

Thank you