presentation sustainable buildings and green markets

7/27/2019 Presentation Sustainable Buildings and Green Markets

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A Civil & Structural Engineering Perspective

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OverviewWhy does it matter & Definitions

Elements of Sustainable/ Green Buildings

Rating Systems Sustainability: Civil and Structural Design


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What is Sustainable Design?"Sustainable development is development that meets theneeds of the present without compromising the ability of

future generations to meet their own needs."

- the United Nations World Commission on Environmentand DevelopmentEnvironmentally sensitive design looks to design in harmony with, and inresponse to the climate. It attempts to use the natural solar and ventilationcharacteristics of the local climate/environment so as to minimize use and

dependency on consumptive non renewable energy sources. In summary:integrate the development within the environment.


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The Major Objectives are:Energy efficient building think use of power to heat, cool and light the building

think embodied energy which is the energy needed toproduce the materials, transport them to the site andinstall them

minimize use of non-renewable materials make buildings durable so that their parts last a long

time to limit replacement costs (both $ andenvironmental)

minimize CO2

and other noxious emissions (Kyoto) minimize the negative impact on the site and

environment including minimizing discharge of solidand liquid.


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Elements of Sustainability


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The need to quantify sustainable

design...Becoming increasingly aware of the need for concernabout the negative impact that buildings have on ourenvironment. The broad question (1987-1999) mightread: What is sustainable design? The more refinedquestion (2000 - ) might ask: How green is it? Whenworking to both create and market sustainable design,it is increasingly important to be able to makedefinitive assessments so that proposals may bequantifiedand compared.

Form part of Maurice Ile Durable (MID) Concept.


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YARDSTICK

Ifwe cant quanitify, we cant compare.

If we dont know how green it is, we cant really sell the idea

convincingly to clients or the public.If we dont know how much environmental saving results, then

we are just producing soft products that may or may not have

any real value. If we dont understand and use sustainable

design with authority, then we really dont know if what wehave produced is correct or will work effectively.


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What are rating systems?

Tools for market transformation

LEED: Leadership in Energy and Environmental Design (US)

BREEAM: Building Research Establisment Environmental AssessmentMethod (UK)

CASBEE: Comprehensive Assessement for Built Environment Efficiency (Japan)

DGNB: (Germany)

Green Star (Australia)

IGBC/LEED: India Green Building Council (India)

UAE: ESTIDAMA


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5 Broad Areas of Application Sustainable Sites

Energy and Atmosphere

Indoor Environmental Quality

Water Efficiency

Materials and Resources


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Application of Sustainability

Pre-Design On-Site Design Construction O&M

Material Selection

Building ProgramProject Budget

Team Selection

Partnering

Project Schedule

Laws, Codes

& Standards

Research

Site Selection

Site Analysis

& Assessment

Site Development

& Layout

Watershed

Management &

Conservation

Site Material

& Equipment

Environmentally

Conscious

Construction

Preservation of

Features &

Vegetation

Waste Mgmt

IAQ Issues

Source Control

Practices

Passive Solar

Design

Materials &

Specification

Indoor Air

Quality

Maintenance PlansIndoor Quality

Energy Efficiency

Resource Efficiency

Renovation

Housekeeping &

Custodial Practices


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LEED Concept and Intent LEED is the most common standard for sustainable

design worldwide.

Design and construction practices that significantly

reduce or eliminate the negative impact of buildingson the environment.

LEED is a point based system that ranks thesustainability of a buildings design by: Classified (40 49 points) Silver (50 59 points)

Gold ( 60-79 points)

Platinum ratings (80 points)


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Why engineers (and you) should

care Direct Contribution by Discipline with reference to LEED:

MEP 36%

Architect/LA 36%

Civil & Structural 22% Constructor 5%

Undefined 1%

Civil Structural engineers can play an active role in many aspects ofdelivering a sustainable building.


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Renewable Energy: Most common perception of Green Design

http://www.power-technology.com
http://www.power-technology.com/http://www.power-technology.com/http://www.power-technology.com/http://www.power-technology.com/


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Most common Perception of Green Design: Photovoltaic Roof

Systems


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Involvement of Civil & Structural Engineers

Sustainable Site Material Specification

Re-Use of building Structure

Responsible Material Sourcing

Design for Assembly

Construction Waste Management and Minimisation

Support to other disciplines: Acoustic, thermal,

lighting


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Table summarising Credit that can be achieved through involvement of SE


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Sustainable Sites Site Selection: Avoid developing building projects or hardscape on site

which are used a farmland, habitat for endangered species, used as park orwater bodies

Brownfield Redevelopment:Aim to protect greenlands by

developing on previously used land

Reduced Site Disturbance: Conserving existing natural areas

Storm Water Management: Use of Sustainable UrbanDrainage Systems (SUDs); Returning Water to the

ground by using permeable paving,


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Sustainable Sites Examples of SUDs

Permeable Pavement

Use of attenuation tank to return water to the groundin a controlled manner.

Filter Drains or better known as french drains


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A selection of well conceived SUDS

Source controlFilter strips


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Source controlpermeable paving



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Source controlswales



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Source controlGreen roofs



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Site controlbasins



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Site controlponds



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Treatment train


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Sustainable Sites: Examples

green roof

controls site water

offsets urban heat island effect


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Materials and Resources Selection of building materials and product: a number of

parameters including the amount energy required tomanufacture, natural resources consumption duringmanufacture, durability and possibility of harmless

recycling. Over years, concrete has been one the primary

construction material. Cement, the main component ofconcrete, responsible for high greenhouse gas emissions.Therefore minimising cement in a concrete mix has many

potential benefits. Use of cement replacement productssuch fly ash, blast furnace slag and silica fume is quitecommon. Included in Mix Design as per BS 8500, ACI 318.Known to improve the properties of concrete including

workability, reducing bleeding, reduce permeability


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Materials and ResourcesThe aim is to work in accordance with the hierarchy of wastemanagement which are

Reduce design out waste: Use of prefabrication

Re-use look for opportunities to re-use materials on site Recycle look for opportunities for others to use your waste Dispose

Use of recycle aggregates in the production of concrete. Mainly used inutility sector. Normally careful planning at an early stage to know

which waste can recycle. During Construction Phase: Reducing waste and minimising the

impact on local community during construction. Use of prefabrication:therfore minimise construction activity by reducing site activities.


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Re-Use of Building

When Designing building, consideration should be given for future flexibility toavoid premature replacement.

Buildings: Long span with minimum downstand and column spacing matchingplanning grids characteristics of regular use ( 7.5mx7.5m , 9mx9m) which can beused in a variety of configurations through refurbishment works ( not common in

Mauritius but slow happening)

Consideration to be given to improve durability and avoid early need forreplacement.


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Sources of information

WWW. ICE.ORG.ukWWW. IStructE.org

THANK YOU FOR YOUR ATTENTION

presentation sustainable buildings and green markets

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