How to clean concrete - Revision history

Editor at 17:30, 12 April 2021

2021-04-12T17:30:23Z

← Older revision		Revision as of 17:30, 12 April 2021
Line 35:		Line 35:
	* Testing concrete.		* Testing concrete.
	* The properties of concrete.		* The properties of concrete.
		+	* Urban exploration UE.

	[[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Construction_techniques]] [[Category:Products_/_components]]		[[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Construction_techniques]] [[Category:Products_/_components]]

Designing Buildings at 06:41, 14 December 2020

2020-12-14T06:41:10Z

← Older revision		Revision as of 06:41, 14 December 2020
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	A concrete sealant can be applied every 2 to 3 years to increase a concrete surface’s resistance to stains.		A concrete sealant can be applied every 2 to 3 years to increase a concrete surface’s resistance to stains.

−	~~= Find out more =~~	+	= Related articles on Designing Buildings Wiki =
−		+
−	=== Related articles on Designing Buildings Wiki ===	+

	* Concrete.		* Concrete.
Line 38:		Line 36:
	* The properties of concrete.		* The properties of concrete.

−	[[Category:~~Construction_techniques~~]] [[Category:~~Products_/_components~~]] [[Category:~~DCN_Product_Knowledge~~]]	+	[[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Construction_techniques]] [[Category:Products_/_components]]

Editor at 12:05, 13 March 2018

2018-03-13T12:05:50Z

← Older revision		Revision as of 12:05, 13 March 2018
Line 34:		Line 34:
	* How to clean masonry.		* How to clean masonry.
	* Restoration.		* Restoration.
		+	* Stratification of concrete.
	* Testing concrete.		* Testing concrete.
	* The properties of concrete.		* The properties of concrete.

−	[[Category:Construction_techniques]] [[Category:Products_/_components]]	+	[[Category:Construction_techniques]] [[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Designing Buildings at 15:37, 12 October 2017

2017-10-12T15:37:33Z

← Older revision		Revision as of 15:37, 12 October 2017
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	= Internal concrete =		= Internal concrete =

−	A less aggressive approach is required for cleaning internal concrete surfaces. ~~Often it will~~ be sufficient to use a mop and a bucket of water mixed with a mild cleaning product, followed by rinsing with a mop and clean water. Difficult stains can be removed by using trisodium phosphate (TSP) mixed with water and scrubbed onto the area with a ~~nylon bristle~~ brush.	+	A less aggressive approach is required for cleaning internal concrete surfaces. It may be sufficient to use a mop and a bucket of water mixed with a mild cleaning product, followed by rinsing with a mop and clean water. Difficult stains can be removed by using trisodium phosphate (TSP) mixed with water and scrubbed onto the area with a brush.

−	A concrete sealant can be applied to increase a concrete surface’s resistance to stains~~. A paint roller can be used to roll the sealant out from the middle of the area out to the edges. This should be done every 2 to 3 years~~.	+	A concrete sealant can be applied every 2 to 3 years to increase a concrete surface’s resistance to stains.

	= Find out more =		= Find out more =

Designing Buildings at 15:35, 12 October 2017

2017-10-12T15:35:58Z

← Older revision		Revision as of 15:35, 12 October 2017
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	= Introduction =		= Introduction =

−	Concrete needs to be cleaned periodically both for reasons of aesthetics and to extend its lifespan. As dirt and grime can build up ~~very~~ gradually on concrete surfaces, it is ~~often helpful~~ to schedule cleaning at ~~routine~~ intervals. The technique ~~and procedure of~~ cleaning concrete depends on the type of surface~~, with care being required to avoid damage~~.	+	Concrete needs to be cleaned periodically both for reasons of aesthetics and to extend its lifespan. As dirt and grime can build up gradually on concrete surfaces, it is sensible to schedule cleaning at regular intervals. The technique for cleaning concrete depends on the type of surface. Specific stains may require cleaning chemicals, but water is usually sufficient for removing normal dirt.
−		+
−	Specific stains ~~will often~~ require cleaning chemicals, ~~although~~ water is usually sufficient for removing dirt.	+

	= External concrete =		= External concrete =

−	The most common method of cleaning external concrete – such as ~~removing~~ oil and grease stains ~~from car parks, driveways, and so on –~~ is by using a power washer, which can be rented. It is usually ~~advised~~ to spray the surface with a detergent, or alkaline degreaser, and leave for 15-20 minutes before spraying with water. The degreaser has the effect of emulsifying the oil, allowing it to be flushed from the surface using hot water.	+	The most common method for cleaning external concrete (such as for the removal of oil and grease stains) is by using a power washer, which can often be rented. It is usually advisable to spray the surface with a detergent, or alkaline degreaser, and leave for 15-20 minutes before spraying with water. The degreaser has the effect of emulsifying the oil, allowing it to be flushed from the surface using hot water.

−	Power washers with a pressure rating of at least 3,000 psi and a flow rate of at least 4 gallons per minute should be used. However, difficult contaminants such as paint and heavy tyre-skid marks may require higher pressures ~~to remove fully~~. Power washers with a rotary nozzle instead of a standard fan nozzle can increase the cleaning speed. Use of a hand-held lance can direct the spray more accurately.	+	Power washers with a pressure rating of at least 3,000 psi and a flow rate of at least 4 gallons per minute should be used. However, difficult contaminants such as paint and heavy tyre-skid marks may require higher pressures. Power washers with a rotary nozzle instead of a standard fan nozzle can increase the cleaning speed. Use of a hand-held lance can direct the spray more accurately.

−	While it is less expensive and easier to use a cold-water power washer~~, since hot-water units require a heavy heating coil and burner system~~, hot-water units clean faster and more effectively.	+	While it is less expensive and easier to use a cold-water power washer, hot-water units clean faster and more effectively.

−	Once the power washing is complete, the area should be checked ~~over~~, and any adjacent walls, windows, or other surfaces which have been dirtied should be washed down; usually without the high-pressure function, as normal mains pressure will suffice. Drainage points, gullies or linear channels should be checked for any blockages or silting ~~due to~~ wash-off.	+	Once the power washing is complete, the area should be checked, and any adjacent walls, windows, or other surfaces which have been dirtied should be washed down; usually without the high-pressure function, as normal mains pressure will suffice. Drainage points, gullies or linear channels should be checked for any blockages or silting from wash-off.

	Depending on the chemicals used in the power-washing, water runoff may not be allowed to enter storm sewers. In addition, any detritus or dirt that accumulates should be disposed of off-site rather than allowed to wash into sewers.		Depending on the chemicals used in the power-washing, water runoff may not be allowed to enter storm sewers. In addition, any detritus or dirt that accumulates should be disposed of off-site rather than allowed to wash into sewers.

−	More difficult stains, such as rust stains which have penetrated deep into concrete ~~surfaces~~, dried grout, ~~and~~ graffiti, ~~chemicals are often required. Muriatric~~ acid or oxalic acid ~~can be used~~, albeit with extreme caution and protective equipment as they are toxic materials.	+	More difficult stains, such as rust stains which have penetrated deep into the concrete surface, dried grout, or graffiti, may require muriatric acid or oxalic acid, albeit with extreme caution and protective equipment as they are toxic materials.

−	To tackle graffiti, several proprietary chemical strippers are available, of which, citrus-based solvents are the safest and have the least stringent disposal requirements, although they are the least aggressive and may not work on all types of paint. Products containing potassium hydroxide, which is soaked into the concrete surface for several hours, followed by the application of an acid neutralizer, can be ~~the most~~ effective solution.	+	To tackle graffiti, several proprietary chemical strippers are available, of which, citrus-based solvents are the safest and have the least stringent disposal requirements, although they are the least aggressive and may not work on all types of paint. Products containing potassium hydroxide, which is soaked into the concrete surface for several hours, followed by the application of an acid neutralizer, can also be an effective solution.

	= Internal concrete =		= Internal concrete =

Editor: Created page with "= Introduction = Concrete needs to be cleaned periodically both for reasons of aesthetics and to extend its lifespan. As dirt and grime can build up very gradually on concrete s..."

2017-09-07T16:22:13Z

Created page with "= Introduction = Concrete needs to be cleaned periodically both for reasons of aesthetics and to extend its lifespan. As dirt and grime can build up very gradually on concrete s..."

New page

= Introduction =

Concrete needs to be cleaned periodically both for reasons of aesthetics and to extend its lifespan. As dirt and grime can build up very gradually on concrete surfaces, it is often helpful to schedule cleaning at routine intervals. The technique and procedure of cleaning concrete depends on the type of surface, with care being required to avoid damage.

Specific stains will often require cleaning chemicals, although water is usually sufficient for removing dirt.

= External concrete =

The most common method of cleaning external concrete – such as removing oil and grease stains from car parks, driveways, and so on – is by using a power washer, which can be rented. It is usually advised to spray the surface with a detergent, or alkaline degreaser, and leave for 15-20 minutes before spraying with water. The degreaser has the effect of emulsifying the oil, allowing it to be flushed from the surface using hot water.

Power washers with a pressure rating of at least 3,000 psi and a flow rate of at least 4 gallons per minute should be used. However, difficult contaminants such as paint and heavy tyre-skid marks may require higher pressures to remove fully. Power washers with a rotary nozzle instead of a standard fan nozzle can increase the cleaning speed. Use of a hand-held lance can direct the spray more accurately.

While it is less expensive and easier to use a cold-water power washer, since hot-water units require a heavy heating coil and burner system, hot-water units clean faster and more effectively.

Once the power washing is complete, the area should be checked over, and any adjacent walls, windows, or other surfaces which have been dirtied should be washed down; usually without the high-pressure function, as normal mains pressure will suffice. Drainage points, gullies or linear channels should be checked for any blockages or silting due to wash-off.

Depending on the chemicals used in the power-washing, water runoff may not be allowed to enter storm sewers. In addition, any detritus or dirt that accumulates should be disposed of off-site rather than allowed to wash into sewers.

More difficult stains, such as rust stains which have penetrated deep into concrete surfaces, dried grout, and graffiti, chemicals are often required. Muriatric acid or oxalic acid can be used, albeit with extreme caution and protective equipment as they are toxic materials.

To tackle graffiti, several proprietary chemical strippers are available, of which, citrus-based solvents are the safest and have the least stringent disposal requirements, although they are the least aggressive and may not work on all types of paint. Products containing potassium hydroxide, which is soaked into the concrete surface for several hours, followed by the application of an acid neutralizer, can be the most effective solution.

= Internal concrete =

A less aggressive approach is required for cleaning internal concrete surfaces. Often it will be sufficient to use a mop and a bucket of water mixed with a mild cleaning product, followed by rinsing with a mop and clean water. Difficult stains can be removed by using trisodium phosphate (TSP) mixed with water and scrubbed onto the area with a nylon bristle brush.

A concrete sealant can be applied to increase a concrete surface’s resistance to stains. A paint roller can be used to roll the sealant out from the middle of the area out to the edges. This should be done every 2 to 3 years.

= Find out more =

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

* Concrete.
* Concrete repair mortars.
* Concreting plant.
* How to clean masonry.
* Restoration.
* Testing concrete.
* The properties of concrete.

[[Category:Construction_techniques]] [[Category:Products_/_components]]