Construction and Demolition Waste Management

Unwanted material arising from strip out of an existing structure

• Excavation Waste

• Construction Waste

• Demolition Waste

• Solid Waste

Unwanted material resulting from reduced level dig and site preparation and levelling, and the digging of foundations, tunnels, and service trenches, typically consisting of soils and stones

• Excavation Waste

• Construction Waste

• Demolition Waste

• Solid Waste

When considering a recyclable construction waste material, three major areas are taken into account except

• Economy

• Compatibility with other materials

• Size

• Material properties

According to EU definitions, ________________ (and other naturally occurring material) excavated in the course of construction activities, where it is certain that the material will be used for the purposes of construction in its natural state on the site from which it was excavated, is not considered as a waste

• Uncontaminated stones

• Uncontaminated wood

• Uncontaminated gravel

• Uncontaminated soil

Aggregates can be classified into

• Primary, Secondary, Tertiary

• Primary, Recycled, Organic

• Primary, Secondary, Recycled

• Organic, Inorganic, Recycled

Typical waste components include the following

• Cement concrete, asphalt concrete, wood, metal

• Cement concrete, asphalt concrete, wood, plastic

• Asphalt concrete, wood, metal, metal, plastic, soil

• All of the above

Millions of tons of waste concrete are generated every year around the world due to following reasons:

I. Creation of cement, plywood, metal for buildings, bridges, and roads

II. Demolition of old structure

III. Deconstruction of buildings and structures during earthquakes and wars

IV. Removal of useless concrete from structures, buildings, road pavements etc

V. Waste concrete generated due to concrete cube and cylinder testing, destructive methods of testing of existing structures etc

• V.

• II. III.

• I. II. III. IV.

• II. III. IV. V.

Approximately how much waste material from a construction site is recyclable

• 100%

• 90%

• 80%

• 50%

In what country was the first demolition waste recycling carried out due to high volumes of demolition wastes accumulated

• USA

• China

• Germany

• Japan

Which among the following is the most expected waste in site clearance

• Rock

• Concrete

• Cement

• Steel