Recycled concrete aggregate RCA - Revision history

Editor at 13:33, 19 August 2021

2021-08-19T13:33:19Z

← Older revision		Revision as of 13:33, 19 August 2021
Line 25:		Line 25:
	* Concrete.		* Concrete.
	* Construction waste.		* Construction waste.
		+	* Iron ore tailings IOTs.
	* Reinforced concrete		* Reinforced concrete
	* Road construction.		* Road construction.

Designing Buildings at 07:19, 25 February 2021

2021-02-25T07:19:15Z

← Older revision		Revision as of 07:19, 25 February 2021
Line 31:		Line 31:
	* Technology Strategy Board TSB.		* Technology Strategy Board TSB.

−	[[Category:~~Research_/_Innovation~~]] [[Category:DCN_Research,_Development_and_Innovation]] [[Category:~~Sustainability~~]] [[Category:~~Products_/_components~~]] [[Category:~~DCN_Product_Knowledge~~]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Research,_Development_and_Innovation]] [[Category:Research_/_Innovation]] [[Category:Sustainability]] [[Category:Products_/_components]]

Designing Buildings at 07:50, 3 August 2020

2020-08-03T07:50:37Z

← Older revision		Revision as of 07:50, 3 August 2020
Line 3:		Line 3:
	= Introduction =		= Introduction =

−	~~There has been growing interest in sustainable materials. A sustainable material is one that:~~	+	Recycled concrete aggregate (RCA also known as recycled crushed aggregate) can be made using waste from quarries and other substances, but researchers have also developed a technique that combines building material waste with used tyres to produce an innovative form of RCA that can be used to construct roads.
−		+
−	* Does not deplete non-renewable (natural) resources.	+
−	* Has no adverse impact on the environment when used.	+
−		+
−	~~One type of material is recycled~~ concrete aggregate (RCA) also known as recycled crushed aggregate~~. Some of these sustainable materials have been~~ made of waste from quarries and other substances, but researchers have developed a technique that combines building material waste with used tyres to produce an innovative form of RCA that can be used to construct roads.	+

	= Construction waste =		= Construction waste =

−	Construction activities can generate large amounts of waste materials that then need to be disposed of. In addition, at the end of a building's life, it may be deconstructed or demolished, generating significant amounts of waste. Construction waste includes waste that is generated during construction activities (such as packaging, or the products of demolition) and materials that are surplus to requirements (as a result of over-ordering or inaccurate estimating).	+	Construction activities can generate large amounts of waste materials that then need to be disposed of. In addition, at the end of a building's life, it may be deconstructed or demolished, generating significant amounts of waste. Increasingly, there are options available in terms of reusing and recycling materials, but despite this, a large amount of construction waste is still disposed of in landfills. According to data from Technology Strategy Board (now known as Innovate UK), 32% of landfill waste comes from the construction and demolition of buildings. Globally that estimate is even higher.
−		+
−	Increasingly, there are options available in terms of reusing and recycling materials, but despite this, a large amount of construction waste is still disposed of in landfills. According to data from Technology Strategy Board (now known as Innovate UK), 32% of landfill waste comes from the construction and demolition of buildings. Globally that estimate is even higher.	+

	= Rubber =		= Rubber =

−	Estimates ~~for scrap tyres put the figure at~~ nearly one billion per year as of 2020. Rubber from tyres is ~~currently being used~~ to make flooring~~, but the idea of combining it with recycled construction waste to make roads is another innovation that is appealing as a sustainability initiative~~.	+	Estimates suggest there are nearly one billion scrap tyres generated per year as of 2020. Rubber from tyres is can be recycled, for example to make flooring. Rubber is highly elastic and durable and is corrosion resistant. It remains flexible in a wide range of temperatures, is water resistant, an electrical and thermal insulator, and is able to absorb movement and vibration.
−		+
−	Rubber is highly elastic and durable and is corrosion resistant. It remains flexible in a wide range of temperatures, is water resistant, an electrical and thermal insulator, and is able to absorb movement and vibration~~. Due to these characteristics, it is already commonly used in the construction industry~~.	+

	= Waste and rubber =		= Waste and rubber =

−	~~Researchers~~ at Royal Melbourne Institute of Technology (~~known as~~ RMIT University) in Melbourne, Australia ~~have worked to produce~~ a material from a combination of these substances that would be suitable and safe ~~for roads. These results were announced in 2020.~~	+	In 2020, researchers at Royal Melbourne Institute of Technology (RMIT University) in Melbourne, Australia announced they had developed a material from a combination of these substances that would be suitable and safe for use as a base layer under flexible roads that consist of materials applied in layers. These layers generally include a subgrade, base, subbase and top.
−		+
−	~~This composite material has characteristics that make it suitable~~ for use as a base layer under flexible roads that consist of materials applied in layers. These layers generally include a subgrade, base, subbase and top.	+
−		+
−	Because of its composition, the recycled waste-rubber base may provide a combination of strength and flexibility to make it a viable engineering option. While construction waste material can be used on its own, the addition of waste rubber has delivered promising test results.	+

−	Lab testing has found the combination of 0.5 percent fine crumb rubber to 99.5 percent RCA to be the most promising in terms of cohesion and strength. The material - which exhibits promising deformation and dynamic properties - has also been tested for stress, shear behaviour, acid and water resistance and durability necessary for road traffic.	+	While construction waste material can be used on its own, the addition of waste rubber has delivered promising test results. Lab testing has found the combination of 0.5 percent fine crumb rubber to 99.5 percent RCA to be the most promising in terms of cohesion and strength. The material - which exhibits promising deformation and dynamic properties - has also been tested for stress, shear behaviour, acid and water resistance and durability necessary for road traffic.

−	~~This material is different from plastic~~ waste~~, which~~ has also been suggested as a suitable substance for new roads and repairs.	+	Plastic waste has also been suggested as a suitable substance for new roads and repairs.

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =
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	* Technology Strategy Board TSB.		* Technology Strategy Board TSB.

−	[[Category:Research_/_Innovation]] [[Category:Sustainability]] [[Category:Products_/_components]]	+	[[Category:Research_/_Innovation]] [[Category:DCN_Research,_Development_and_Innovation]] [[Category:Sustainability]] [[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Editor at 16:43, 31 July 2020

2020-07-31T16:43:06Z

← Older revision		Revision as of 16:43, 31 July 2020
Line 38:		Line 38:
	* Concrete.		* Concrete.
	* Construction waste.		* Construction waste.
		+	* Reinforced concrete
	* Road construction.		* Road construction.
	* Rubber in the construction industry.		* Rubber in the construction industry.
		+	* Sustainable materials for construction.
	* Technology Strategy Board TSB.		* Technology Strategy Board TSB.

	[[Category:Research_/_Innovation]] [[Category:Sustainability]] [[Category:Products_/_components]]		[[Category:Research_/_Innovation]] [[Category:Sustainability]] [[Category:Products_/_components]]

Editor at 16:38, 31 July 2020

2020-07-31T16:38:03Z

← Older revision		Revision as of 16:38, 31 July 2020
Line 1:		Line 1:
−	[[File:LargerTyreonRoad.jpg]]	+	[[File:LargerTyreonRoad.jpg\|link=File:LargerTyreonRoad.jpg]]

	= Introduction =		= Introduction =
Line 35:		Line 35:

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =
		+
		+	* Concrete.
		+	* Construction waste.
		+	* Road construction.
		+	* Rubber in the construction industry.
		+	* Technology Strategy Board TSB.

	[[Category:Research_/_Innovation]] [[Category:Sustainability]] [[Category:Products_/_components]]		[[Category:Research_/_Innovation]] [[Category:Sustainability]] [[Category:Products_/_components]]

Editor: Created page with "File:LargerTyreonRoad.jpg = Introduction = There has been growing interest in sustainable materials. A sustainable material is one that: * Does not deplete non-renewable (..."

2020-07-31T16:34:19Z

Created page with "File:LargerTyreonRoad.jpg = Introduction = There has been growing interest in sustainable materials. A sustainable material is one that: * Does not deplete non-renewable (..."

New page

[[File:LargerTyreonRoad.jpg]]

= Introduction =

There has been growing interest in sustainable materials. A sustainable material is one that:

* Does not deplete non-renewable (natural) resources.
* Has no adverse impact on the environment when used.

One type of material is recycled concrete aggregate (RCA) also known as recycled crushed aggregate. Some of these sustainable materials have been made of waste from quarries and other substances, but researchers have developed a technique that combines building material waste with used tyres to produce an innovative form of RCA that can be used to construct roads.

= Construction waste =

Construction activities can generate large amounts of waste materials that then need to be disposed of. In addition, at the end of a building's life, it may be deconstructed or demolished, generating significant amounts of waste. Construction waste includes waste that is generated during construction activities (such as packaging, or the products of demolition) and materials that are surplus to requirements (as a result of over-ordering or inaccurate estimating).

Increasingly, there are options available in terms of reusing and recycling materials, but despite this, a large amount of construction waste is still disposed of in landfills. According to data from Technology Strategy Board (now known as Innovate UK), 32% of landfill waste comes from the construction and demolition of buildings. Globally that estimate is even higher.

= Rubber =

Estimates for scrap tyres put the figure at nearly one billion per year as of 2020. Rubber from tyres is currently being used to make flooring, but the idea of combining it with recycled construction waste to make roads is another innovation that is appealing as a sustainability initiative.

Rubber is highly elastic and durable and is corrosion resistant. It remains flexible in a wide range of temperatures, is water resistant, an electrical and thermal insulator, and is able to absorb movement and vibration. Due to these characteristics, it is already commonly used in the construction industry.

= Waste and rubber =

Researchers at Royal Melbourne Institute of Technology (known as RMIT University) in Melbourne, Australia have worked to produce a material from a combination of these substances that would be suitable and safe for roads. These results were announced in 2020.

This composite material has characteristics that make it suitable for use as a base layer under flexible roads that consist of materials applied in layers. These layers generally include a subgrade, base, subbase and top.

Because of its composition, the recycled waste-rubber base may provide a combination of strength and flexibility to make it a viable engineering option. While construction waste material can be used on its own, the addition of waste rubber has delivered promising test results.

Lab testing has found the combination of 0.5 percent fine crumb rubber to 99.5 percent RCA to be the most promising in terms of cohesion and strength. The material - which exhibits promising deformation and dynamic properties - has also been tested for stress, shear behaviour, acid and water resistance and durability necessary for road traffic.

This material is different from plastic waste, which has also been suggested as a suitable substance for new roads and repairs.

= Related articles on Designing Buildings Wiki =

[[Category:Research_/_Innovation]] [[Category:Sustainability]] [[Category:Products_/_components]]