Rak precast vs sustainability

RAK PRECAST AND GREEN

CONSTRUCTION

OUTLINE

• INTRODUCTION

• LEED

• ESTIDAMA

• RELATION BETWEEN PRECAST & SUSTAINABILITY

• RAK PRECAST ROLE IN SUSTAINABILITY

INTRODUCTION

• WHAT IS SUSTAINABILITY ?

• Sustainable construction is concerned with the economic, social, and environmental impact of creating a usable structure.

• It requires designers and contractors to use building practices that will not cause long-term damage to the environment.

• Sustainable buildings are designed to be energy efficient, to be healthy for the people who live or work in them, and to reduce pollution and waste.

• WHY SHOULD WE BUILD SUSTAINABLE BUILDINGS ?

The consumer sectors responsible for the Global Warming are ranked as:

• Buildings (48%)

• Transportation• Industry

*Energy Information Administration 2006. Emission of green house gases in the United States

INTRODUCTION

• Dose building skeleton affect the building

sustainability?

Structural engineering is an integral part of green building design on number of fronts:• Recyclability and reusability of materials and systems.• The choice of locally available materials and resources.• Resourceful use or efficiency of structural system.• Provision for future adaptability of the buildings• Numerous green building design strategies can have direct

impact on structural design of the building.

INTRODUCTION

LEED …

• The Leadership in Energy and Environmental Design (LEED™) Green Building Rating System represents the U.S. Green Building Council’s effort to provide a national standard for what constitutes a “green building.” Through its use as a design guideline and third-party certification tool

• It aims to improve occupant well-being, environmental performance and economic returns of buildings using established and innovative practices, standards and technologies

LEED CREDITS

In order to be classified in LEED, the following requirements should be considered:

UAE GOES LEED …

LEED GREEN BUILDINGS OF THE UAE

Pacific Controls Headquarters- LEED Platinum


WAFI CITY DISTRICT COOLING CHILLERPLANT DCCP ONE1st LEED green building in UAE & Middle East


Dubai World Trade Centre Development – Phase 1

ESTIDAMA …

• The Abu Dhabi Government has recently initiated the Estidama Buildings and Communities Program under the direction of the Emirate of Abu Dhabi Urban Planning Council (UPC).

• The ultimate goal of this ambitious program is to transform Abu Dhabi into the sustainable capital of the Arab world

• The Interim Estidama Community Guidelines (IECG) are an important element of this effort.

• The objective of these guidelines is to guide residential, commercial, and institutional projects in a way that will build sustainable developments, neighborhoods, and communities in the Emirate of Abu Dhabi.

ESTIDAMA CREDITS

RELATION BETWEEN PRECAST & SUSTAINABILITY

Comparison on the three building structure materials, upon LEED rating system.

• According to LEED, the material used for construction affects the rating of the building..

• Precast concrete is considered the most efficient material to be used in construction since it complies with all LEED credits and prerequisites.

RELATION BETWEEN PRECAST & SUSTAINABILITYLEED Category Credit or Prerequisite Points

Available

Sustainable Sites Credit 5.1: Site Development, Protect or Restore Habitat 1

Sustainable Sites Credit 5.2: Site Development, Maximize Open Space 1

Sustainable Sites Credit 7.1: Heat Island Effect, Non-Roof 1

Energy and Atmosphere

Prerequisite 2: Minimum Energy Performance ---

Energy and Atmosphere

Credit 1 : Optimize Energy Performance 1 – 19

Materials and Resources

Credit 1 : Building Reuse, Maintain 55%, 75%, 95% of Existing Shell 1 – 3


Credit 2.1: Construction Waste Management, divert 50% by weight or volume 1


Credit 2.2: Construction Waste Management, divert 75% by weight or volume 1


Credit 4.1: Recycled Content, the post-consumer recycled content plus one-half of the preconsumer content constitutes at least 10% (based on cost) of the total value of the materials in the project

1



1


Credit 5.1: Local/Regional Materials, Use a minimum of 10% (based on cost) of the total materials value

1



1

Indoor EnvironmentalQuality

Credit 3.1: Construction Indoor Air Quality Management Plan, During Construction

1

RELATION BETWEEN PRECAST & SUSTAINABILITYCredit or Prerequisite Concret

eCast -in

situ

Concrete Pre-cast

Steel Wood

Credit 5.1: Site Development, Protect or Restore Habitat * * *

Credit 5.2: Site Development, Maximize Open Space * *

Credit 7.1: Heat Island Effect, Non-Roof * * *

Prerequisite 2: Minimum Energy Performance *

Credit 1 : Optimize Energy Performance *

Credit 1 : Building Reuse, Maintain 55%, 75%, 95% of Existing Shell

* * * *

Credit 2.1: Construction Waste Management, divert 50% by weight or volume

* * * *

Credit 2.2: Construction Waste Management, divert 75% by weight or volume

* * *


* * *


* * *


* * *


* * *

Credit 3.1: Construction Indoor Air Quality Management Plan, During Construction

*

Credit 5.1: Site Development, Protect or Restore Habitat:

• The requirements are met by limiting site disturbance.

• Since precast concrete sound wall systems are manufactured off site and delivered on demand, there is a significant reduction in truck traffic, dust, noise and debris from formwork

• precast concrete structures, and manhole can be used to help obtain this point.


Credit 5.2: Site Development, Maximize Open Space: • The intent of this credit is to provide a high ratio of open space to development footprint. • The requirements are met by limiting the size of the development …..footprint, specifically by exceeding the local zoning’s open space requirement. • Pre-cast, pre-stressed concrete skeleton

can be used to help obtain this point.


Credit 7.1: Heat Island Effect, Non-Roof:

• The intent of this credit is to reduce heat islands’ to minimize impacts on microclimates and human and wildlife habitats.

• Pre-cast concrete with SRI of at least 29 used in the hardscape, or in the open-grid pavements, can be used to help obtain this point.


Prerequisite 2: Minimum Energy Performance:

• All buildings must comply with certain sections on building energy efficiency and performance as required by the ANSI/ ASHRAE/IESNA 90.1-2007.

• Insulating to meet or exceed the requirements of the standard is generally a wise business choice.

• Pre-cast sandwich panel walls, can be used to help obtain this point.


Credit1: Building Reuse, Maintain 55%, 75%, 95% of Existing Shell: Precast concrete panels can be reused when buildings are expanded. Concrete pieces from demolished structures also can be reused in other applications. Because the precast process is self-contained, finishing materials are reused, while concrete steel forms have practically unlimited service lives.


Credit 2.1: Construction Waste Management, divert 50%, 75% by weight or volume: Precast concrete can be designed to optimize or lessen the amount of concrete used. In the plant, precast concrete generates low amounts of waste, and the waste generated has low toxicity.


Credit 4 : Recycled Content: In precast concrete, Industrial wastes such as slag cement and silica fume can be incorporated into the mix, reducing the amount of cement, which in turn reduces CO2 emissions.


Credit5.1: Local/Regional Materials: The use of local materials reduces the transportation needs for heavy building materials, along with the associated energy and emissions. Most precast concrete plants are within 200 miles of a building site. The cement, aggregates and reinforcing steel used to fabricate precast concrete components, are usually obtained or extracted from sources within 200 miles.


Credit 3.1: Construction Indoor Air Quality Management Plan, During Construction:Concrete contains low to negligible Volatile Organic Compounds (VOCs). These compounds degrade indoor air quality when they off-gas from manufactured wood products such as laminate, particleboard, hardboard siding and treated wood. Concrete is not damaged by moisture and does not provide nutrients for mold growth.


Credit ID: Innovative in design:Pre-cast concrete applications, could contribute in implementing new intelligent solutions. Rising the performance of HVAC and heating systems, indoor air quality, or pollution prevention.


Hollow core slab ventilation:Hollow core slabs voids, could use for the Stack Effect –pull out the hot air in the night time, with cool air from out side-. And could used with installation of Radiant heat tube. This saves material and reduce heating load.


Photocatalytic cement:Photocatalytic concrete decomposing

the harmful molecules in the vicinity by an oxidation reaction. Thus, fewer harmful chemicals and more pure clean air is available.

Pre-cast concrete is ideal system for using this type of finishing.


RAK PRECAST ROLE IN SUSTAINABILITY

• RAK Precast is one of the registered suppliers in Estidama vendor list for Insulated wall panels which achieve the required U-Value and R-Value.

http://www.estidama.org/estidama-villa-products-database/insulation-products-and-systems.aspx



RAK PRECAST ROLE IN SUSTAINABILITY

• EVPD (Estidama Villa Product Database)

http://www.estidama.org/media/142871/evpd-full-wall-pip-rak-precast.pdf



Green Building – Minimum Envelope Performance Requirements

Mohammed Bin Rashid City - MHS

Residential Community 2200 Typical Semi Detached Villas

Mohammed Bin Rashid City - MHS

Phase-1

PHASE-1 EXPANDED POLYSTERENE

PHASE-1 EXPANDED POLYSTERENEEXPANDED POLYSTERENE OF STYRO NEOPOR SN14 WITH THERMAL CONDUCTIVITY 0.0339 W/mK

PHASE-1 EXPANDED POLYSTERENE

Phase-2

PHASE-2 EXTRUDED POLYSTERENE

PHASE-2 EXTRUDED POLYSTERENEEXTRUDED POLYSTERENE OF ACIC DENSITY 26-28kg/m³ WITH THERMAL CONDUCTIVITY 0.0301 W/mK

Rak precast vs sustainability

Engineering

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