Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
  • E01C7/00—Coherent pavings made in situ
  • E01C7/08—Coherent pavings made in situ made of road-metal and binders
  • E01C7/35—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
  • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
  • E01H1/10—Hydraulically loosening or dislodging undesirable matter; Raking or scraping apparatus ; Removing liquids or semi-liquids e.g., absorbing water, sliding-off mud
  • E01H1/101—Hydraulic loosening or dislodging, combined or not with mechanical loosening or dislodging, e.g. road washing machines with brushes or wipers
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G23/00—Working measures on existing buildings
  • E04G23/002—Arrangements for cleaning building facades

Definitions

• ABSTRACT A method for cleansing the exterior surface of a building of masonry, stone, brick or the like by which a jet of water at a temperature of not less than 100C. is directed by a nozzle in close juxtaposition to such surface under a pressure of about 20 atm. so that the larger quantity of water does not vaporize before touching the surface to be cleaned.
• the water vaporizes either on or in the exterior coating of the surface being cleaned so that when expanding the steam presses the dirt etc. from the pores, capillaries and fissures of the surface.
• a solution is brushed or sprayed on the cleansed surface to render it water resistant.
• the invention deals with "a technique as to how to treat surfaces of buildings and passage-ways, as also bridgesand airport tarmacs.
• the invention is based on the use of heated water, which is sprayed against the area which is to be cleansed.
• the surface area is generally impregnated with a preparation, as for example, with silicic acid solution.
• a preparation as for example, with silicic acid solution.
• the molecules of the impregnation medium are not firmly anchored deeply enough with the exterior coat of the material, thus these are readily loosened again as for example, when subjected to the power of rain downpours, hailstones, and the like.
• This invention relates to a method of depth cleansing of exterior surfaces of buildings and passage-ways of masonry, stone, brick,- and the like and which is based on the use of hot water under relatively high pressure.
• the heated water is forced with great power into the pores of the exterior surface. There it is vaporized.
• salt residue, chemicals, dirt collection, water residue, etc. are catapulted out.
• the surface thus treated has applied to it an impregnation solution once or several times, as required.
• the exterior surface acquires a water resistant quality which permits a vapor diffusion out of thebuilding wall into the atmosphere.
• the method in accordance with the invention is thus mainly determined in. that the exterior surface is cleansed by water at a temperature of more than C forced under pressure through a nozzle which is held at an almost exact right angle against the area to be cleansed.
• the nozzle is guided translatorily parallel to the surface to be cleansed.
• the nozzle should be no more than 2 cm from the area to be cleansed so that most of the water particles do not vaporize before the jet touches the surface, whereby the water either on or in thesurface coat finally vaporizes.
• This enables dirt and dirty capillary water to be washed out when the expanding vapor presses out of the pores, capillaries and fissures of the exterior coat. Furthermore, this makes the impregnation of the deeply cleansed exterior coat possible, as required.
• solutions which are composed of certain mixtures containing alkyl, alkoxy, and silan. These solutions are dissolved in alcohol and then applied to the cleansed area, either by use of a brush or by spraying. Alternatively, the building materials are impregnated with this solution after first being cleansed. These solutions are usually based on compositions which, under the influence of damp air become hydrolized, and, thus, form a direct binding to the binding mediums of the building materials.
• the groups of organic silicate acid compositions are directed to the surface area, and the water resistant effect is attained by covering the area of the material evenly with a coating of a composition of a hydrophobic organic group which increases the interior tension toward the water. This coating on the surface area increases the exterior tension towards water and thus reduces the suction capacity of the exterior area capillaries.
• the pressure of the water is produced by a pump and in which the water is heated to a minimum of 100C.
• An operating pressure of 20 atm. is best adapted at the entrance of the nozzle.
• the pressure drops rather quickly to atmospheric pressure, whereas the water temperature does not drop at the same rate.
• the water is thus overheated at the entrance of the nozzle due to this delay in boiling. vaporization begins'probably in the nozzle outlet. The velocity of the jet is increased considerably.
• vaporization is only combeen stated, is the bases upon which the impregnation fect, the water jet should be concentrated when it hits the surface areaqvlt must possess sufficient energy so that the vaporization may enter into the exterior'coating. Should the distance be large, the jet loses itself with respect to concentration because too much water vaporizes during the boiling procedure while, at thesame time, the jet temperature falls. i Also the form of the nozzle is of significance towards attaining the required technical effect. A certain minimum quantity of water per time unit must be, released at the pressure andtemperature required for operation to prevent all the waterfrom vaporizing when the jet leaves the nozzle. v
• the nozzle has to be held at'a maximum distance of two centimeters from the surface being cleaned in order to achieve proper vaporization of the water in the hollow capillary compartment's.
• Method of cleansing the exterior surface of a building of masonry, stone, brick or the like comprismg I I a. directing a jet of water at a temperature not less than about 100C. from a nozzle at a pressureof about 20 atmagainst the surfaceto be cleaned,

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• Mechanical Engineering (AREA)
• Cleaning By Liquid Or Steam (AREA)
• Road Repair (AREA)
• Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=20266611

Family Applications (1)

Country Status (9)

Cited By (2)

Families Citing this family (1)

Citations (7)

• 1972
  • 1972-04-26 SE SE05496/72A patent/SE361703B/xx unknown
• 1973
  • 1973-04-19 CA CA170,403A patent/CA1007145A/en not_active Expired
  • 1973-04-20 FR FR7314601A patent/FR2182488A5/fr not_active Expired
  • 1973-04-23 US US353367A patent/US3895957A/en not_active Expired - Lifetime
  • 1973-04-24 BE BE130345A patent/BE798629A/xx unknown
  • 1973-04-25 GB GB1956073A patent/GB1379340A/en not_active Expired
  • 1973-04-25 NL NL7305763A patent/NL7305763A/xx unknown
  • 1973-04-26 JP JP48046858A patent/JPS5131461B2/ja not_active Expired
  • 1973-05-08 IT IT68297/73A patent/IT1009025B/it active

Patent Citations (7)

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