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hydro-gresage

English translation: sandblasting

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06:25 Sep 10, 2001
French to English translations [PRO]
Tech/Engineering
French term or phrase: hydro-gresage
method of cleaning the facade of a building
amlewis
Local time: 08:55
English translation:sandblasting
Explanation:


An abrasive cleaning method using water (hydro) and sand (grès) ? Sandblasting ? (Rush job I’m afraid. I’m about to sign off.)

http://www2.cr.nps.gov/tps/briefs/brief06.htm
Abrasive cleaning methods include all techniques that physically abrade the building surface to remove soils, discolorations or coatings. Such techniques involve the use of certain materials which impact or abrade the surface under pressure, or abrasive tools and equipment. Sand, because it is readily available, is probably the most commonly used type of grit material. However, any of the following materials may be substituted for sand, and all can be classified as abrasive substances: ground slag or volcanic ash, crushed (pulverized) walnut or almond shells, rice husks, ground corncobs, ground coconut shells, crushed eggshells, silica flour, synthetic particles, glass beads and micro-balloons. Even water under pressure can be an abrasive substance. Tools and equipment that are abrasive to historic building materials include wire brushes, rotary wheels, power sanding disks and belt sanders.
The use of water in combination with grit may also be classified as an abrasive cleaning method. Depending on the manner in which it is applied, water may soften the impact of the grit, but water that is too highly pressurized can be very abrasive. There are basically two different methods which can be referred to as "wet grit," and it is important to differentiate between the two. One technique involves the addition of a stream of water to a regular sandblasting nozzle. This is done primarily to cut down dust, and has very little, if any, effect on reducing the aggressiveness, or cutting action of the grit particles. With the second technique, a very small amount of grit is added to a pressurized water stream. This method may be controlled by regulating the amount of grit fed into the water stream, as well as the pressure of the water.

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Nikki Scott-Despaigne
Local time: 09:55
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4 KudoZ points were awarded for this answer

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Summary of answers provided
4sandblasting
Nikki Scott-Despaigne


Discussion entries: 1





  

Answers


1 hr   confidence: Answerer confidence 4/5Answerer confidence 4/5
sandblasting


Explanation:


An abrasive cleaning method using water (hydro) and sand (grès) ? Sandblasting ? (Rush job I’m afraid. I’m about to sign off.)

http://www2.cr.nps.gov/tps/briefs/brief06.htm
Abrasive cleaning methods include all techniques that physically abrade the building surface to remove soils, discolorations or coatings. Such techniques involve the use of certain materials which impact or abrade the surface under pressure, or abrasive tools and equipment. Sand, because it is readily available, is probably the most commonly used type of grit material. However, any of the following materials may be substituted for sand, and all can be classified as abrasive substances: ground slag or volcanic ash, crushed (pulverized) walnut or almond shells, rice husks, ground corncobs, ground coconut shells, crushed eggshells, silica flour, synthetic particles, glass beads and micro-balloons. Even water under pressure can be an abrasive substance. Tools and equipment that are abrasive to historic building materials include wire brushes, rotary wheels, power sanding disks and belt sanders.
The use of water in combination with grit may also be classified as an abrasive cleaning method. Depending on the manner in which it is applied, water may soften the impact of the grit, but water that is too highly pressurized can be very abrasive. There are basically two different methods which can be referred to as "wet grit," and it is important to differentiate between the two. One technique involves the addition of a stream of water to a regular sandblasting nozzle. This is done primarily to cut down dust, and has very little, if any, effect on reducing the aggressiveness, or cutting action of the grit particles. With the second technique, a very small amount of grit is added to a pressurized water stream. This method may be controlled by regulating the amount of grit fed into the water stream, as well as the pressure of the water.




    Reference: http://www2.cr.nps.gov/tps/briefs/brief06.htm
Nikki Scott-Despaigne
Local time: 09:55
Native speaker of: Native in EnglishEnglish
PRO pts in pair: 4431
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