The “Green” Advantages of Precast ConcreteFor earning LEED points
KCIC is up to the task in aiming to provide higher levels of environmental friendliness as well as to grow attention to climate change and the consumption of energy and materials in the State of Qatar. To reach these goals, we believe that precast concrete components, which provide a number of “green” advantages, can help a lot into the achieving this target.
Precast concrete panels can help achieve the LEED certification in a variety of ways. These included their ability to be recycled, local manufacturing capability and thermal mass and insulated cores. All of these attributes help reduce the expended energy needed to manufacture, transport and erect materials, which are key LEED requirements.
Minimum Energy Performance
Precast concrete’s key benefit comes from its thermal mass, which helps the material store heat and moderate daily temperature swings. When that advantage is used in insulated sandwich wall panels, in which a layer of insulation is sandwiched between two parts of a concrete panel, the material can produce high R factors and lower HVAC needs.
Construction Waste Management
Precast Concrete helps in reducing construction, demolition and land-clearing waste that ends up in landfills. At least 50 percent of these materials must be kept out of landfills in conjunction with the Building Reuse credit to achieve as many as four points if existing materials on-site, such as precast concrete wall panels, are reused in the project.
Precast concrete offers other waste-saving benefits since less material is required to produce precast components because precise mix designs and tighter tolerances can be achieved. The waste materials also are more likely to be recycled because concrete production takes place in one location under controlled conditions.
There is less dust and waste at the construction site, because only the needed precast components are delivered and there is no debris from formwork and associated fasteners. Fewer trucks and less time are needed because concrete is made offsite. Less noise is produced at the site as well, reducing noise pollution.
Concrete’s durability gives it a strong advantage in this category, as both a total-precast concrete structural system and structural or architectural panels can provide long life.
Reduced Site Impact
Since precast concrete products are manufactured off site and delivered on demand, there is a significant reduction in truck traffic, dust, noise and debris from formwork associated with pour in place products.
Precast Concrete uses materials with post-consumer recycled or post-industrial recycled content of a specific total. Precast concrete components contribute to this requirement because supplementary cementitious materials can replace a proportion of cement in the mix, and those materials are considered post-industrial recycled ingredients.
For LEED accreditation, a one-point credit is offered when at least 20 percent of building materials are manufactured within a 500-mile radius of the site. An additional point is offered when half of the regionally manufactured products are extracted or recovered within 500 miles.
Precast concrete meets both of these requirements in virtually all cases since the raw materials used to produce the precast concrete components — cement, aggregate and rebar — usually are obtained from sources within 500 miles of the precast plant.
Reuse. Reduce. Recyle.The end result is more of a positive domino effect: Less material used means using fewer natural resources and reduced manufacturing and transportation energy, leading to avoided emissions from mining, processing and transporting raw and finished materials
For more information how we can help you to earn LLEd point , Please conatct
Mr. Hussein Kondakji
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