Mundic - Revision history

Editor at 09:20, 24 January 2022

2022-01-24T09:20:37Z

← Older revision		Revision as of 09:20, 24 January 2022
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	If a property receives a poor test result but the mundic block is limited to a specific part of the structure, it may be possible to replace those materials (or demolish that portion of the structure) for the property to be deemed suitable for sale. This may happen, for example, in situations where an older property (pre-1900, for instance) has had an extension added - using concrete - during a time when mundic materials might have been used. If only the extension fails the test and can be removed or rebuilt, it may be possible to secure a mortgage once the problem has been resolved.		If a property receives a poor test result but the mundic block is limited to a specific part of the structure, it may be possible to replace those materials (or demolish that portion of the structure) for the property to be deemed suitable for sale. This may happen, for example, in situations where an older property (pre-1900, for instance) has had an extension added - using concrete - during a time when mundic materials might have been used. If only the extension fails the test and can be removed or rebuilt, it may be possible to secure a mortgage once the problem has been resolved.

−	= Related articles on Designing Buildings ~~Wiki~~ =	+	= Related articles on Designing Buildings =

	* Aggregate.		* Aggregate.
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	* Radon.		* Radon.
	* Royal Institution of Chartered Surveyors RICS.		* Royal Institution of Chartered Surveyors RICS.
		+	* Tin.
	* Types of cement.		* Types of cement.
	* Types of concrete.		* Types of concrete.

Editor at 10:46, 2 July 2021

2021-07-02T10:46:43Z

← Older revision		Revision as of 10:46, 2 July 2021
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	* Home ownership.		* Home ownership.
	* Portland cement.		* Portland cement.
		+	* Pyrite and mica redress issues in Dail Eireann.
	* Radon.		* Radon.
	* Royal Institution of Chartered Surveyors RICS.		* Royal Institution of Chartered Surveyors RICS.

Editor at 18:33, 12 January 2021

2021-01-12T18:33:25Z

← Older revision		Revision as of 18:33, 12 January 2021
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	* The Royal Institution of Chartered Surveyors (RICS), [https://www.rics.org/globalassets/rics-website/media/upholding-professional-standards/sector-standards/building-surveying/the-mundic-problem-3rd-edition-rics.pdf The mundic problem (3rd edition)].		* The Royal Institution of Chartered Surveyors (RICS), [https://www.rics.org/globalassets/rics-website/media/upholding-professional-standards/sector-standards/building-surveying/the-mundic-problem-3rd-edition-rics.pdf The mundic problem (3rd edition)].

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

Designing Buildings at 06:07, 22 July 2020

2020-07-22T06:07:55Z

Editor at 16:58, 20 July 2020

2020-07-20T16:58:09Z

Editor at 16:50, 20 July 2020

2020-07-20T16:50:19Z

← Older revision		Revision as of 16:50, 20 July 2020
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	= Introduction =		= Introduction =

−	Originally, the term mundic - a Cornish word - was used to describe a mineral (pyrite) that ~~occurs naturally~~ in rocks in Cornwall and Devon. Pyrite is a naturally occurring type of iron sulfide mineral.	+	Originally, the term mundic - a Cornish word - was used to describe a mineral (pyrite) that is found in rocks in Cornwall and Devon. Pyrite is a naturally occurring type of iron sulfide mineral.

	The term mundic has also been adopted to describe a condition that occurs when structures deteriorate due to the oxidisation of unstable sulphides (often including pyrite) that is sometimes incorporated into the materials that are used to make up the concrete.		The term mundic has also been adopted to describe a condition that occurs when structures deteriorate due to the oxidisation of unstable sulphides (often including pyrite) that is sometimes incorporated into the materials that are used to make up the concrete.

Editor at 16:19, 20 July 2020

2020-07-20T16:19:06Z

← Older revision		Revision as of 16:19, 20 July 2020
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	* Aggregate.		* Aggregate.
	* Concrete.		* Concrete.
		+	* Deleterious materials in construction.
	* Home ownership.		* Home ownership.
	* Portland cement.		* Portland cement.

Editor at 16:12, 20 July 2020

2020-07-20T16:12:19Z

← Older revision		Revision as of 16:12, 20 July 2020
Line 66:		Line 66:
	* Home ownership.		* Home ownership.
	* Portland cement.		* Portland cement.
		+	* Radon.
	* Royal Institution of Chartered Surveyors RICS.		* Royal Institution of Chartered Surveyors RICS.
	* Types of cement.		* Types of cement.

Editor at 16:11, 20 July 2020

2020-07-20T16:11:20Z

← Older revision		Revision as of 16:11, 20 July 2020
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	{\|		{\|
−	~~\|width="100%"~~\| [[File:MundicWorks.jpg]]	+	\| [[File:MundicWorks.jpg\|link=File:MundicWorks.jpg]]
	\|-		\|-
	\| View of the mundic works at Mount Morgan, circa 1905.		\| View of the mundic works at Mount Morgan, circa 1905.
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	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =
		+
		+	* Aggregate.
		+	* Concrete.
		+	* Home ownership.
		+	* Portland cement.
		+	* Royal Institution of Chartered Surveyors RICS.
		+	* Types of cement.
		+	* Types of concrete.

	= External resources =		= External resources =

	* The Royal Institution of Chartered Surveyors (RICS), [https://www.rics.org/globalassets/rics-website/media/upholding-professional-standards/sector-standards/building-surveying/the-mundic-problem-3rd-edition-rics.pdf The mundic problem (3rd edition)].		* The Royal Institution of Chartered Surveyors (RICS), [https://www.rics.org/globalassets/rics-website/media/upholding-professional-standards/sector-standards/building-surveying/the-mundic-problem-3rd-edition-rics.pdf The mundic problem (3rd edition)].
		+
		+	[[Category:Definitions]] [[Category:History]] [[Category:Products_/_components]]

Editor at 16:06, 20 July 2020

2020-07-20T16:06:48Z

← Older revision		Revision as of 16:06, 20 July 2020
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		+	{\|
		+	\|width="100%"\| [[File:MundicWorks.jpg]]
		+	\|-
		+	\| View of the mundic works at Mount Morgan, circa 1905.
		+	\|}
		+
	= Introduction =		= Introduction =

← Older revision		Revision as of 06:07, 22 July 2020
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	= Introduction =		= Introduction =

−	Originally, the term mundic - a Cornish word - was used to describe a mineral (pyrite) that is found in rocks in Cornwall and Devon. Pyrite is a naturally occurring ~~type~~ of iron sulfide ~~mineral~~.	+	Originally, the term mundic - a Cornish word - was used to describe a mineral (pyrite) that is found in rocks in Cornwall and Devon. Pyrite is a naturally occurring mineral of iron sulfide.

−	The term mundic has also been adopted to describe a condition that occurs when structures deteriorate due to the oxidisation of unstable sulphides (often including pyrite) ~~that is~~ sometimes incorporated into the materials that ~~are used to~~ make up ~~the~~ concrete ~~in the building~~. Concrete is the most commonly used man-made material on earth. It is a composite material, consisting mainly of cement, water and aggregate, which can include sand, gravel or crushed rock.	+	The term mundic has also been adopted to describe a condition that occurs when structures deteriorate due to the oxidisation of unstable sulphides (often including pyrite), sometimes incorporated into the materials that make up concrete. Concrete is the most commonly used man-made material on earth. It is a composite material, consisting mainly of cement, water and aggregate, which can include sand, gravel or crushed rock.

	Aggregates are mixed with cement and water to provide bulk and to modify the physical and chemical properties of the mix. There are several desirable properties of aggregates:		Aggregates are mixed with cement and water to provide bulk and to modify the physical and chemical properties of the mix. There are several desirable properties of aggregates:
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	* Good shape: Smooth and round aggregates provide good workability, whereas angular and rough aggregates tend to give better compressive strength.		* Good shape: Smooth and round aggregates provide good workability, whereas angular and rough aggregates tend to give better compressive strength.

−	One common source ~~for~~ aggregate is crushed rock from quarries. If that ~~gravel or crushed rock include~~ pyrite, the substance associated with mundic, the resulting material may produce sulphuric acid when exposed to moisture. The reaction, called sulphation, can have an impact on other materials in the concrete to form gypsum, which causes crystallisation and expansion. This can result in the deterioration of the concrete.	+	One common source of aggregate is gravel or crushed rock from quarries. If that includes pyrite, the substance associated with mundic, the resulting material may produce sulphuric acid when exposed to moisture. The reaction, called sulphation, can have an impact on other materials in the concrete to form gypsum, which causes crystallisation and expansion. This can result in the deterioration of the concrete.

	= History =		= History =

−	In the 18th and 19th centuries, ~~the regions of~~ Cornwall and Devon ~~became~~ widely mined for their rich natural resources - particularly copper and tin. As an inexpensive and plentiful substance, the mining waste material - high in pyric content - could be recycled and used in the aggregate mixture that was sometimes incorporated into concrete for construction in the early 20th century. From approximately 1900 to 1960, the practice of using this waste material in concrete for housing construction became fairly common.	+	In the 18th and 19th centuries, Cornwall and Devon were widely mined for their rich natural resources - particularly copper and tin. As an inexpensive and plentiful substance, the mining waste material - high in pyric content - could be recycled and used in the aggregate mixture that was sometimes incorporated into concrete for construction in the early 20th century. From approximately 1900 to 1960, the practice of using this waste material in concrete for housing construction became fairly common.

−	Over the years, it became apparent that the integrity of concrete with pyric content could become compromised. When exposed to moisture, this material could actually erode the cement and cause the concrete to crack and make it vulnerable to even more moisture, eventually causing it to crumble and fail in the most extreme instances.	+	Over the years, it became apparent that the integrity of concrete with pyric content could become compromised. When exposed to moisture, this material could actually erode the cement and cause the concrete to crack and make it vulnerable to even more moisture penetration, eventually causing it to crumble and fail in the most extreme instances.

	= Consequences of mundic =		= Consequences of mundic =
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	There are certain parts of the country where mundic-containing material has been used in some residential construction (particularly in the foundation of houses) in the form of mundic blocks. In these structures, it may be necessary to subject a property to testing before it can be sold. Unless the property passes the test, it may be difficult for the potential home buyer to secure a mortgage without going to a specialist broker.		There are certain parts of the country where mundic-containing material has been used in some residential construction (particularly in the foundation of houses) in the form of mundic blocks. In these structures, it may be necessary to subject a property to testing before it can be sold. Unless the property passes the test, it may be difficult for the potential home buyer to secure a mortgage without going to a specialist broker.

−	A mundic test ~~requires~~ small samples of concrete ~~to be~~ drilled out and sent ~~off~~ to a laboratory for analysis. Test results usually take ~~approximately~~ two weeks to arrange and complete.	+	A mundic test require that small samples of concrete are drilled out and sent to a laboratory for analysis. Test results usually take two weeks to arrange and complete.

	For the purpose of obtaining a mortgage, the property survey results will be broken down into a report using these classifications:		For the purpose of obtaining a mortgage, the property survey results will be broken down into a report using these classifications:
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	\|}		\|}

−	Guidelines for mundic ~~test requirements~~ are provided by The Royal Institution of Chartered Surveyors (RICS).	+	Guidelines for mundic tests are provided by The Royal Institution of Chartered Surveyors (RICS).

−	~~As previously stated, mundic~~ block tests are typically conducted on residential properties ~~located~~ in Cornwall or Devon~~. They are generally required in these specific parts of the country on structures~~ using concrete (but not brick or stone) and built between 1900 and 1960; they will also be requested if decay caused by mundic is visibly apparent.	+	Mundic block tests are typically conducted on residential properties in Cornwall or Devon using concrete (but not brick or stone) and built between 1900 and 1960; they will also be requested if decay caused by mundic is visibly apparent.

	Reports can sometimes be transferred from one homeowner to another, but for mortgage purposes, the report must be made out in the name of the new homeowner. However, this is only possible if the original surveying firm is able to execute the transfer.		Reports can sometimes be transferred from one homeowner to another, but for mortgage purposes, the report must be made out in the name of the new homeowner. However, this is only possible if the original surveying firm is able to execute the transfer.

−	If a property receives a poor test result but the mundic block is limited to a specific part of the structure, it may be possible to replace those materials (or demolish that portion of the structure) ~~in order~~ for the property to be deemed suitable for sale. This ~~happens~~ in situations where an older property (pre-1900, for instance) has had an extension added - using concrete - during a time when mundic materials might have been used. If only the extension fails the test and can be removed or rebuilt, it may be possible to secure a mortgage once the problem has been resolved.	+	If a property receives a poor test result but the mundic block is limited to a specific part of the structure, it may be possible to replace those materials (or demolish that portion of the structure) for the property to be deemed suitable for sale. This may happen, for example, in situations where an older property (pre-1900, for instance) has had an extension added - using concrete - during a time when mundic materials might have been used. If only the extension fails the test and can be removed or rebuilt, it may be possible to secure a mortgage once the problem has been resolved.

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =
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	* The Royal Institution of Chartered Surveyors (RICS), [https://www.rics.org/globalassets/rics-website/media/upholding-professional-standards/sector-standards/building-surveying/the-mundic-problem-3rd-edition-rics.pdf The mundic problem (3rd edition)].		* The Royal Institution of Chartered Surveyors (RICS), [https://www.rics.org/globalassets/rics-website/media/upholding-professional-standards/sector-standards/building-surveying/the-mundic-problem-3rd-edition-rics.pdf The mundic problem (3rd edition)].

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

← Older revision		Revision as of 16:58, 20 July 2020
Line 9:		Line 9:
	Originally, the term mundic - a Cornish word - was used to describe a mineral (pyrite) that is found in rocks in Cornwall and Devon. Pyrite is a naturally occurring type of iron sulfide mineral.		Originally, the term mundic - a Cornish word - was used to describe a mineral (pyrite) that is found in rocks in Cornwall and Devon. Pyrite is a naturally occurring type of iron sulfide mineral.

−	The term mundic has also been adopted to describe a condition that occurs when structures deteriorate due to the oxidisation of unstable sulphides (often including pyrite) that is sometimes incorporated into the materials that are used to make up the concrete.	+	The term mundic has also been adopted to describe a condition that occurs when structures deteriorate due to the oxidisation of unstable sulphides (often including pyrite) that is sometimes incorporated into the materials that are used to make up the concrete in the building. Concrete is the most commonly used man-made material on earth. It is a composite material, consisting mainly of cement, water and aggregate, which can include sand, gravel or crushed rock.

−	~~Concrete is the most commonly used man-made material on earth. It is a composite material, consisting mainly of cement, water and aggregate, which can include sand, gravel or crushed rock.~~ Aggregates are mixed with cement and water to provide bulk and to modify the physical and chemical properties of the mix. There are several desirable properties of aggregates:	+	Aggregates are mixed with cement and water to provide bulk and to modify the physical and chemical properties of the mix. There are several desirable properties of aggregates:

	* Clean: Free from any organic substances such as dust or other fine materials.		* Clean: Free from any organic substances such as dust or other fine materials.
Line 19:		Line 19:
	* Good shape: Smooth and round aggregates provide good workability, whereas angular and rough aggregates tend to give better compressive strength.		* Good shape: Smooth and round aggregates provide good workability, whereas angular and rough aggregates tend to give better compressive strength.

−	One common source for aggregate is crushed rock from quarries. If that gravel or crushed rock include pyrite, the substance associated with mundic, the resulting material may produce sulphuric acid when exposed to moisture. The reaction, called sulphation, can have an impact on other materials in the concrete to form gypsum, which causes crystallisation and expansion.	+	One common source for aggregate is crushed rock from quarries. If that gravel or crushed rock include pyrite, the substance associated with mundic, the resulting material may produce sulphuric acid when exposed to moisture. The reaction, called sulphation, can have an impact on other materials in the concrete to form gypsum, which causes crystallisation and expansion. This can result in the deterioration of the concrete.

	= History =		= History =

−	In the 18th and 19th centuries, the regions of Cornwall and Devon became widely mined for their rich natural resources - particularly copper and tin. As an inexpensive and plentiful substance, the mining waste material - high in pyric content - could be recycled and used in the aggregate mixture that ~~became~~ incorporated into concrete for construction in the early 20th century. From approximately 1900 to 1960, the practice of using this waste material in concrete for housing construction became fairly common~~, particularly in Cornwall and Devon~~.	+	In the 18th and 19th centuries, the regions of Cornwall and Devon became widely mined for their rich natural resources - particularly copper and tin. As an inexpensive and plentiful substance, the mining waste material - high in pyric content - could be recycled and used in the aggregate mixture that was sometimes incorporated into concrete for construction in the early 20th century. From approximately 1900 to 1960, the practice of using this waste material in concrete for housing construction became fairly common.

	Over the years, it became apparent that the integrity of concrete with pyric content could become compromised. When exposed to moisture, this material could actually erode the cement and cause the concrete to crack and make it vulnerable to even more moisture, eventually causing it to crumble and fail in the most extreme instances.		Over the years, it became apparent that the integrity of concrete with pyric content could become compromised. When exposed to moisture, this material could actually erode the cement and cause the concrete to crack and make it vulnerable to even more moisture, eventually causing it to crumble and fail in the most extreme instances.
Line 29:		Line 29:
	= Consequences of mundic =		= Consequences of mundic =

−	There are certain parts of the country where mundic-containing material has been used in residential construction (particularly in the foundation of houses) in the form of mundic blocks. In these structures, it may be necessary to subject a property to testing before it can be sold. Unless the property passes the test, it may be difficult for the home buyer to secure a mortgage without going to a specialist broker.	+	There are certain parts of the country where mundic-containing material has been used in some residential construction (particularly in the foundation of houses) in the form of mundic blocks. In these structures, it may be necessary to subject a property to testing before it can be sold. Unless the property passes the test, it may be difficult for the potential home buyer to secure a mortgage without going to a specialist broker.

	A mundic test requires small samples of concrete to be drilled out and sent off to a laboratory for analysis. Test results usually take approximately two weeks to arrange and complete.		A mundic test requires small samples of concrete to be drilled out and sent off to a laboratory for analysis. Test results usually take approximately two weeks to arrange and complete.
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	Guidelines for mundic test requirements are provided by The Royal Institution of Chartered Surveyors (RICS).		Guidelines for mundic test requirements are provided by The Royal Institution of Chartered Surveyors (RICS).

−	~~Mundic~~ block tests are typically conducted on residential properties located in Cornwall or Devon. They are generally required in these specific parts of the country on structures using concrete (but not brick or stone) and built between 1900 and ~~1950~~; they will also be requested if decay caused by mundic is visibly apparent.	+	As previously stated, mundic block tests are typically conducted on residential properties located in Cornwall or Devon. They are generally required in these specific parts of the country on structures using concrete (but not brick or stone) and built between 1900 and 1960; they will also be requested if decay caused by mundic is visibly apparent.

−	Reports can sometimes be transferred from one homeowner to another, but for mortgage purposes, the report ~~will require~~ the name of the new homeowner. However, this is only possible if the original surveying firm is able to execute the transfer.	+	Reports can sometimes be transferred from one homeowner to another, but for mortgage purposes, the report must be made out in the name of the new homeowner. However, this is only possible if the original surveying firm is able to execute the transfer.

−	If a property receives a poor test result but the mundic block is limited to a specific part of the structure, it may be possible to replace those materials in order for the property to be deemed suitable for sale. This happens in situations where an older property (pre-1900, for instance) has had an extension added - using concrete - during a time when mundic materials might have been used. If only the extension fails the test and can be removed or rebuilt, it may be possible to secure a mortgage once the problem has been resolved.	+	If a property receives a poor test result but the mundic block is limited to a specific part of the structure, it may be possible to replace those materials (or demolish that portion of the structure) in order for the property to be deemed suitable for sale. This happens in situations where an older property (pre-1900, for instance) has had an extension added - using concrete - during a time when mundic materials might have been used. If only the extension fails the test and can be removed or rebuilt, it may be possible to secure a mortgage once the problem has been resolved.

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =