Mass concrete - Revision history

Designing Buildings at 08:22, 21 February 2021

2021-02-21T08:22:23Z

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	* Types of concrete.		* Types of concrete.

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Designing Buildings at 12:16, 3 February 2020

2020-02-03T12:16:32Z

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	The emphasis on thermal behaviour – which can cause a loss of structural integrity and monolithic action – is the only characteristic that distinguishes mass concrete from other concrete work.		The emphasis on thermal behaviour – which can cause a loss of structural integrity and monolithic action – is the only characteristic that distinguishes mass concrete from other concrete work.

−	Mass concrete is usually associated with large, poured in-situ concrete structures such as dams, bridge piers, foundations to very tall buildings and other large volume placements which are at least 1m-deep. In many cases, mass concrete is unreinforced and therefore strong in compression, weak in tension.	+	Mass concrete is usually associated with large, poured in-situ concrete structures such as dams, bridge piers, foundations to very tall buildings and other large volume placements which are at least 1m-deep. In many cases, mass concrete is unreinforced and therefore strong in compression but weak in tension.

	= Hoover Dam =		= Hoover Dam =

−	Construction of the Hoover Dam (pictured) on the Colorado River, US, ~~begun~~ 1931, required enormous quantities of mass concrete (3.3 million cubic metres) to construct its arch-gravity structure. It is 13.7m wide at the top and 201m-wide at the bottom. To dissipate the heat generated by the cooling (setting) of the mass concrete required a vast network of water ~~circulated~~ through steel pipes. Without this, the concrete would still be setting today.	+	Construction of the Hoover Dam (pictured) on the Colorado River, USA, began in 1931, required enormous quantities of mass concrete (3.3 million cubic metres) to construct its arch-gravity structure. It is 13.7m wide at the top and 201m-wide at the bottom. To dissipate the heat generated by the cooling (setting) of the mass concrete required a vast network of water circulating through steel pipes. Without this, the concrete would still be setting today.

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =
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	* Types of concrete.		* Types of concrete.

−	[[Category:Definitions]] [[Category:Products_/_components]]	+	[[Category:Definitions]] [[Category:DCN_Definition]] [[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Editor: Created page with "{| | File:Hoover dam.jpg |} = Introduction = The generally accepted and widely-used definition of ‘mass concrete’ is that provided by the American Concrete Institute (A..."

2020-01-30T19:24:28Z

Created page with "{| | File:Hoover dam.jpg |} = Introduction = The generally accepted and widely-used definition of ‘mass concrete’ is that provided by the American Concrete Institute (A..."

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= Introduction =

The generally accepted and widely-used definition of ‘mass concrete’ is that provided by the American Concrete Institute (ACI). It defines mass concrete as:

“…any volume of structural concrete in which a combination of dimensions of the member being cast, the boundary conditions, the characteristics of the concrete mixture, and the ambient conditions [which] can lead to undesirable thermal stresses, cracking, deleterious chemical reactions, or reduction in the long-term strength as a result of elevated concrete temperature due to heat of hydration.”

The emphasis on thermal behaviour – which can cause a loss of structural integrity and monolithic action – is the only characteristic that distinguishes mass concrete from other concrete work.

Mass concrete is usually associated with large, poured in-situ concrete structures such as dams, bridge piers, foundations to very tall buildings and other large volume placements which are at least 1m-deep. In many cases, mass concrete is unreinforced and therefore strong in compression, weak in tension.

= Hoover Dam =

Construction of the Hoover Dam (pictured) on the Colorado River, US, begun 1931, required enormous quantities of mass concrete (3.3 million cubic metres) to construct its arch-gravity structure. It is 13.7m wide at the top and 201m-wide at the bottom. To dissipate the heat generated by the cooling (setting) of the mass concrete required a vast network of water circulated through steel pipes. Without this, the concrete would still be setting today.

= Related articles on Designing Buildings Wiki =

* Admixtures in concrete.
* Cast-in-place concrete.
* Cement mortar.
* Compression.
* Compressive strength.
* Concrete-steel composite structures.
* Concreting plant.
* Laitance.
* Portland cement.
* Precast concrete.
* Prestressed concrete.
* Power float.
* Reinforced concrete.
* Self-compacting concrete.
* Smart concrete.
* Testing concrete.
* The properties of concrete.
* Types of concrete.

[[Category:Definitions]] [[Category:Products_/_components]]