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Construction waste or debris is any kind of
debris Debris (, ) is rubble, wreckage, ruins, litter and discarded waste, garbage/refuse/trash, scattered remains of something destroyed, or, as in geology, large rock fragments left by a melting glacier, etc. Depending on context, ''debris'' can ref ...
from the
construction Construction are processes involved in delivering buildings, infrastructure, industrial facilities, and associated activities through to the end of their life. It typically starts with planning, financing, and design that continues until the a ...
process. Different government agencies have clear definitions. For example, the United States Environmental Protection Agency EPA defines construction and
demolition Demolition (also known as razing and wrecking) is the science and engineering in safely and efficiently tearing down buildings and other artificial structures. Demolition contrasts with deconstruction (building), deconstruction, which inv ...
materials as “debris generated during the construction, renovation and demolition of buildings, roads, and bridges.” Additionally, the EPA has categorized Construction and Demolition (C&D) waste into three categories:  non-dangerous, hazardous, and semi-hazardous. Of total construction and demolition (C&D) waste in the United States, 90% comes from the demolition of structures, while waste generated during construction accounts for less than 10%. Construction waste frequently includes materials that are hazardous if disposed of in landfills. Such items include fluorescent lights, batteries, and other electrical equipment. Waste from a construction project can contain "microplastics, PFAS, titanium dioxide, dyes and various chemicals and toxins that originate from the resin and masonry-based finishes used in buildings, such as paint, stain, plaster, grout, adhesives and patching compounds." When waste is created, options of disposal include exportation to a landfill, incineration, direct site reuse through integration into construction or as fill dirt, and recycling for a new use if applicable. In dealing with construction and demolition waste products, it is often hard to recycle and repurpose because of the cost of processing. Businesses recycling materials must compete with often the low cost of landfills and new construction commodities. Data provided by 24 states reported that solid waste from construction and demolition (C&D) accounts for 23% of total waste in the U.S. This is almost a quarter of the total solid waste produced by the United States. During construction a lot of this waste spends in a landfill leaching toxic chemicals into the surrounding environment. Results of a recent questionnaire demonstrate that although 95.71% of construction projects indicate that construction waste is problematic, only 57.14% of those companies collect any relevant data.


Types of waste

C&D Materials, construction and demolition materials, are materials used in and harvested from new building and civil engineer structures. Much building waste is made up of materials such as
brick A brick is a type of construction material used to build walls, pavements and other elements in masonry construction. Properly, the term ''brick'' denotes a unit primarily composed of clay. But is now also used informally to denote building un ...
s,
concrete Concrete is a composite material composed of aggregate bound together with a fluid cement that cures to a solid over time. It is the second-most-used substance (after water), the most–widely used building material, and the most-manufactur ...
and
wood Wood is a structural tissue/material found as xylem in the stems and roots of trees and other woody plants. It is an organic materiala natural composite of cellulosic fibers that are strong in tension and embedded in a matrix of lignin t ...
damaged or unused during construction. Observational research has shown that this can be as high as 10 to 15% of the materials that go into a building, a much higher percentage than the 2.5-5% usually assumed by
quantity surveyor In the construction industry, a quantity surveyor (QS) is a professional with expert knowledge of construction costs and contracting. Qualified professional quantity surveyors can be known as Chartered Surveyors (Members and Fellows of RICS) i ...
s and the
construction industry Construction are processes involved in delivering buildings, infrastructure, industrial facilities, and associated activities through to the end of their life. It typically starts with planning, financing, and design that continues until the ...
. Since considerable variability exists between construction sites, there is much opportunity for reducing this waste. There has been a massive increase in construction and demolition waste created over the last 30 years in the United States. In 1990, 135 million tons of construction and demolition debris by weight were created and had risen to 600 million tons by the year 2018. This is a 300% increase, but it is important to note that since 2015 the EPA has kept records of how the waste is disposed of. In 2018, 600 million tons of waste was created due to construction and demolition, and 143 million tons of it resides in landfills. This means that about 76% of waste is now retained and repurposed in the industry, but there is still more waste being exported to landfills than the entire amount of waste created in 1990. This unsustainable consumption of
raw material A raw material, also known as a feedstock, unprocessed material, or primary commodity, is a basic material that is used to produce goods, finished goods, energy, or intermediate materials/Intermediate goods that are feedstock for future finished ...
s creates increasing business risks. This includes higher material costs or disruptions in the
supply chain A supply chain is a complex logistics system that consists of facilities that convert raw materials into finished products and distribute them to end consumers or end customers, while supply chain management deals with the flow of goods in distri ...
s. In 2010, the EPA created the Sustainable Materials Management (SMM) Program Strategic Plan which marked a strategic shift by the EPA to move emphasis from broad resource recovery initiative to sustainable materials management. Since material management regulations largely exist at a state and local level, this is no real standard practice across the nation for responsible waste mitigation strategies for
construction material This is a list of building materials. Many types of building materials are used in the construction industry to create buildings and structures. These categories of materials and products are used by architects and construction project manager ...
s. The EPA aims to increase access to collection, processing, and recycling infrastructure in order to meet this issue head on.


Main causes of waste

Construction waste can be categorized as follows: Design, Handling, Worker, Management, Site condition, Procurement and External.  These categories were derived from data collected from past research concerning the frequency of different types of waste noted during each type of these activities. Examples of this type of waste are as follows:


Steel reinforcement

Steel Steel is an alloy of iron and carbon that demonstrates improved mechanical properties compared to the pure form of iron. Due to steel's high Young's modulus, elastic modulus, Yield (engineering), yield strength, Fracture, fracture strength a ...
is used as
reinforcement In Behaviorism, behavioral psychology, reinforcement refers to consequences that increase the likelihood of an organism's future behavior, typically in the presence of a particular ''Antecedent (behavioral psychology), antecedent stimulus''. Fo ...
and structural integrity in the vast majority of construction projects. The main reasons steel is wasted on a site is due to irresponsible beam cutting and fabrication issues. The worst sites usually end up being the ones that do not have adequate design details and standards, which can result in waste due to short ends of bars being discarded due to improper planning of cuts. Many companies now choose to purchase preassembled steel reinforcement pieces. This reduces waste by outsourcing the bar cutting to companies that prioritize responsible material use.


Premixed concrete

Premixed
concrete Concrete is a composite material composed of aggregate bound together with a fluid cement that cures to a solid over time. It is the second-most-used substance (after water), the most–widely used building material, and the most-manufactur ...
has one of the lowest waste indices when compared to other building materials. Many site managers site the difficulties controlling concrete delivery amounts as a major issue in accurately quantifying concrete needed for a site. The deviations from actually constructed concrete slabs and beams and the design amounts necessary were found to be 5.4% and 2.7% larger than expected, respectively, when comparing the data from 30 Brazilian sites. Many of these issues were attributed to inadequate form layout or lack of precision in excavation for
foundation pile A pile or piling is a vertical structural element of a deep foundation, driven or drilled deep into the ground at the building site. A deep foundation is a type of foundation that transfers building loads to the earth farther down from th ...
s. Additionally, site managers know that additional concrete may be needed, and they will often order excess material to not interrupt the concrete pouring.


Pipes and wires

It is often difficult to plan and keep track of all the pipes and wires on a site as they are used in so many different areas of a project, especially when electrical and
plumbing Plumbing is any system that conveys fluids for a wide range of applications. Plumbing uses piping, pipes, valves, piping and plumbing fitting, plumbing fixtures, Storage tank, tanks, and other apparatuses to convey fluids. HVAC, Heating and co ...
services are routinely subcontracted. Many issues of waste arise in this area of the construction process because of poorly designed details and irresponsible cutting of pipes and wires leaving short, wasted pipes and wires.


Improper material storage

The second leading cause of construction waste production is improper material storage. Exposure to the elements and miss handling by persons are due to human error. Part of this human error can lead to illegal dumping and illegal transportation volume of waste from a jobsite.


Recycling, disposal and environmental impact


Recycling and reuse of material

Most guidelines on C&D waste management follows the waste managing hierarchy framework. This framework involves a set of alternatives for dealing with waste arranged in descending order of preference. The waste hierarchy is a nationally and internationally accepted concept used to priorities and guide efforts to manage waste. Under the idea of Waste Hierarchy, there is the concept of the "3R's," often known as "reduce, reuse, recycle." Certain countries adopt different numbers of "R's." The European Union, for example, puts principal to the "4R" system which includes "Recovery" in order to reduce waste of materials. Alternatives include prevention, energy recovery, (treatment) and disposal. It is possible to
recycle ReCycle is a music loop editor designed and developed by Sweden, Swedish software developers Propellerhead Software. It runs on Microsoft Windows and Apple Macintosh based Personal Computer, PCs. The software debuted in 1994. The principal idea ...
many elements of construction waste. Often
roll-off Roll-off is the steepness of a transfer function with frequency, particularly in electrical network analysis, and most especially in connection with filter circuits in the transition between a passband and a stopband. It is most typically app ...
containers are used to transport the waste.
Rubble Rubble is broken stone, of irregular size, shape and texture; undressed especially as a filling-in. Rubble naturally found in the soil is known also as 'brash' (compare cornbrash)."Rubble" def. 2., "Brash n. 2. def. 1. ''Oxford English Dictionar ...
can be crushed and reused in construction projects. Waste wood can also be recovered and recycled.


Landfilling

Some certain components of construction waste such as plasterboard are hazardous once
landfill A landfill is a site for the disposal of waste materials. It is the oldest and most common form of waste disposal, although the systematic burial of waste with daily, intermediate and final covers only began in the 1940s. In the past, waste was ...
ed. Plasterboard is broken down in landfill conditions releasing
hydrogen sulfide Hydrogen sulfide is a chemical compound with the formula . It is a colorless chalcogen-hydride gas, and is toxic, corrosive, and flammable. Trace amounts in ambient atmosphere have a characteristic foul odor of rotten eggs. Swedish chemist ...
, a toxic gas. Once broken down, Plasterboard poses a threat for increases Arsenic concentration Levels in its toxic inorganic form. The traditional disposal way for construction waste is to send it to landfill sites. In the U.S., federal regulations now require groundwater monitoring, waste screening, and operator training, due to the environmental impact of waste in C&D landfills (CFR 1996). Sending the waste directly to a landfill causes many problems: * Waste of natural resources * Increases construction cost, especially the transportation process * Occupies a large area of land * Reduces
soil quality Soil quality refers to the condition of soil based on its capacity to perform ecosystem services that meet the needs of human and non-human life.Tóth, G., Stolbovoy, V. and Montanarella, 2007. Soil Quality and Sustainability Evaluation - An integ ...
* Causes
water pollution Water pollution (or aquatic pollution) is the contamination of Body of water, water bodies, with a negative impact on their uses. It is usually a result of human activities. Water bodies include lakes, rivers, oceans, aquifers, reservoirs and ...
(
Leachate A leachate is any liquid that, in the course of passing through matter, extracts soluble or suspended solids, or any other component of the material through which it has passed. Leachate is a widely used term in the environmental sciences wh ...
) * Causes
air pollution Air pollution is the presence of substances in the Atmosphere of Earth, air that are harmful to humans, other living beings or the environment. Pollutants can be Gas, gases like Ground-level ozone, ozone or nitrogen oxides or small particles li ...
* Produces security risks etc.


Incineration and health risks

Where recycling is not an option, the disposal of construction waste and hazardous materials must be carried out according to legislation of relevant councils and regulatory bodies. The penalties for improper disposal of construction waste and
hazardous waste Hazardous waste is waste that must be handled properly to avoid damaging human health or the environment. Waste can be hazardous because it is Toxicity, toxic, Chemical reaction, reacts violently with other chemicals, or is Corrosion, corrosive, ...
, including asbestos, can reach into the tens of thousands of dollars for businesses and individuals.
Waste-to-energy Waste-to-energy (WtE) or energy-from-waste (EfW) refers to a series of processes designed to convert waste materials into usable forms of energy, typically electricity or heat. As a form of energy recovery, WtE plays a crucial role in both wa ...
facilities burn more than 13% of solid municipal waste. The toxic fumes emitted by WTE plants can contain harmful chemicals such as mercury and other
heavy metals upright=1.2, Crystals of lead.html" ;"title="osmium, a heavy metal nearly twice as dense as lead">osmium, a heavy metal nearly twice as dense as lead Heavy metals is a controversial and ambiguous term for metallic elements with relatively h ...
,
carbon monoxide Carbon monoxide (chemical formula CO) is a poisonous, flammable gas that is colorless, odorless, tasteless, and slightly less dense than air. Carbon monoxide consists of one carbon atom and one oxygen atom connected by a triple bond. It is the si ...
,
sulfur dioxide Sulfur dioxide (IUPAC-recommended spelling) or sulphur dioxide (traditional Commonwealth English) is the chemical compound with the formula . It is a colorless gas with a pungent smell that is responsible for the odor of burnt matches. It is r ...
, and dioxins. Dioxin was used as a waste oil in
Times Beach, Missouri Times Beach is a ghost town in St. Louis County, Missouri, St. Louis County, Missouri, United States, southwest of St. Louis, Missouri, St. Louis and east of Eureka, Missouri, Eureka. Once home to more than two thousand people, the town was co ...
. Days after the chemicals were introduced to the community animals began dying. By the time the EPA deemed dioxins to be highly toxic in the 1980s, the CDC recommended the town be abandoned entirely due to contaminated waste products in the area. By 1985, the entire population of Times Beach had been relocated, prompting Missouri to build a new incinerator on the
contaminated land Contaminated land contains substances in or under the land that are definitively or potentially hazardous to health or the environment. These areas often have a long history of industrial production and industrial farming. Many sites may be affect ...
. They continued to burn 265,000 tons of dioxin-contaminated waste until 1997. Dioxins are a family of chemicals produced as a byproduct during the manufacturing of many pesticides and construction materials like
carpet A carpet is a textile floor covering typically consisting of an upper layer of Pile (textile), pile attached to a backing. The pile was traditionally made from wool, but since the 20th century synthetic fiber, synthetic fibres such as polyprop ...
ing and PVC. These chemicals exist in the environment attached to soil or dust particles that are invisible to the naked eye. Dioxins break down slowly. It still threatens public health at low levels. Since industry has mostly stopped producing dioxins, one of the largest contributors releasing harmful dioxins left in the United States is waste incineration. Dioxins have been proven to cause cancer, reproductive and developmental issues, and immune system damage. Rates of cancer such as non-Hodgkin's lymphoma and soft tissue sarcoma rise significantly the closer one lives to the pollutants' source.


Management strategies


Waste management fees

Waste management fees, under the 'polluter pays principle', can help mitigate levels of construction waste. There is very little information on determining a waste management fee for construction waste created. Many models for this have been created in the past, but they are subjective and flawed. In 2019, a study method was proposed to optimize the construction waste management fee. The new model expands on previous ones by considering life-cycle costs of construction waste and weighs it against the willingness to improve construction waste management. The study was based out of China. China has a large waste management issue, and their landfills are mostly filled in urban areas. The results of the study indicated different waste management fees for metal, wood, and masonry waste as $9.30, $5.92, and $4.25, respectively. The cost of waste management per square meter, or just under 11 square feet, on average was found to be $0.12. This type of waste management system requires top-down legislative action. It is not a choice the contractor has the luxury of making on his/her own.


Europe

In the
European Union The European Union (EU) is a supranational union, supranational political union, political and economic union of Member state of the European Union, member states that are Geography of the European Union, located primarily in Europe. The u ...
(EU), there is now significant emphasis on recycling building materials and adopting a cradle-to-grave ideology when it comes to building design, construction, and demolition. Their suggestions are much clearer and easier at the local or regional level, depending on government structure. In the 2016 EU Construction & Demolition Waste Management Protocol, they emphasize the benefits beyond financial gains for recycling such as job creation and reduced landfilling. They also emphasize the consideration of supply and demand geography; if the recycling plants are closer to urban areas than the aggregate quarries this can incentivize companies to use this recycled product even if it is not initially cheaper. In
Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...
, there are new improvements in the recycling of unusable wood products to be burnt in the creation of cement which offsets the carbon footprint of both products. The EU urges local authorities who issue demolition and renovation permits to ensure that a high-quality waste management plan is being followed, and they emphasize the need for post-demolition follow-ups in order to determine if the implemented plans are being followed. They also suggest the use of taxation to reduce the economic advantage of the landfills to create a situation where recycling becomes a reasonable choice financially. However, they do include the fact that the tax should only apply to recyclable waste materials. The main points of how the Europeans choose to address this issue of waste management is through the utilization of the tools given to a governing body to keep its people safe. Unlike in the United States, the EU's philosophy on waste management is not that it is an optional good thing to do when you can but a mandatory part of construction in the 21st century to ensure a healthy future for generations to follow. Taxing landfill has been most effective in Belgium, Denmark and Austria, which have all decreased their landfill disposal by over 30% since introducing the tax. Denmark successfully cut its landfill use by over 80%, reaching a recycling rate over 60%. In the United Kingdom, all personnel performing builders or construction waste clearance are required by law to be working for a CIS registered business. However, the waste generation in the UK continues to grow, but the rate of increase has slowed.


United States

The United States has no national landfill tax or fee, but many states and local governments collect taxes and fees on the disposal of solid waste. The California Department of Resource Recycling and Recovery ( CalRecycle) was created in 2010 to address the growing C&D waste problem in the United States. CalRecycle aids in the creation of C&D waste diversion model ordinance in local jurisdictions. They also provide information and other educational material on alternative C&D waste facilities. They promote these ordinances by creating incentive programs to encourage companies to participate in the waste diversion practices. There are also available grants and loans to aid organizations in their waste reduction strategies. According to a survey, financially incentivizing stakeholders to reduce construction waste demonstrates favorable results.  This information provides an alternative way to reduce the cost so that the industry is more careful in their project decisions from beginning to end.


See also

*
ATSDR The Agency for Toxic Substances and Disease Registry (ATSDR) is a federal public health agency within the U.S. Department of Health and Human Services (HHS). The agency focuses on minimizing human health risks associated with exposure to hazar ...
*
Carcinogen A carcinogen () is any agent that promotes the development of cancer. Carcinogens can include synthetic chemicals, naturally occurring substances, physical agents such as ionizing and non-ionizing radiation, and biologic agents such as viruse ...
* Construction dust , Metal dust , Metal swarf , Lead dust ,
Asbestos Asbestos ( ) is a group of naturally occurring, Toxicity, toxic, carcinogenic and fibrous silicate minerals. There are six types, all of which are composed of long and thin fibrous Crystal habit, crystals, each fibre (particulate with length su ...
, Cement dust , Concrete dust , Wood dust , Paint dust * Concrete recycling *
COPD Chronic obstructive pulmonary disease (COPD) is a type of progressive lung disease characterized by chronic respiratory symptoms and airflow limitation. GOLD defines COPD as a heterogeneous lung condition characterized by chronic respiratory s ...
* COSHH * Demolition waste * NIEHS *
Particulates Particulate matter (PM) or particulates are microscopic particles of solid or liquid matter suspension (chemistry), suspended in the atmosphere of Earth, air. An ''aerosol'' is a mixture of particulates and air, as opposed to the particulate ...
,
Ultrafine particle Ultrafine particles (UFPs) are particulate matter of nanoscale size (less than 0.1 μm or 100 nm in diameter). Regulations do not exist for this size class of ambient air pollution particles, which are far smaller than the regulated PM10 and ...
*
Power tool A power tool is a tool that is actuator, actuated by an additional engine, power source and mechanism (engineering), mechanism other than the solely manual labour, manual labor used with hand tools. The most common types of power tools use electric ...
*
Recycling Recycling is the process of converting waste materials into new materials and objects. This concept often includes the recovery of energy from waste materials. The recyclability of a material depends on its ability to reacquire the propert ...
*
Silicosis Silicosis is a form of occupational lung disease caused by inhalation of crystalline silica dust. It is marked by inflammation and scarring in the form of Nodule (medicine), nodular lesions in the upper lobes of the lungs. It is a type of pneum ...
* VOC *
Waste management Waste management or waste disposal includes the processes and actions required to manage waste from its inception to its final disposal. This includes the collection, transport, treatment, and disposal of waste, together with monitor ...
*
Welding Welding is a fabrication (metal), fabrication process that joins materials, usually metals or thermoplastics, primarily by using high temperature to melting, melt the parts together and allow them to cool, causing Fusion welding, fusion. Co ...
* Embodied carbon


References


External links


Construction Waste Management Database
from the Whole Building Design Guide of the
National Institute of Building Sciences The National Institute of Building Sciences is a non-profit, non-governmental organization that identifies and resolves problems and potential issues in the built environment throughout the United States. Its creation was authorized by the U.S. Con ...
{{DEFAULTSORT:Construction Waste Construction Waste Building materials