GB2360472A - Method of coating storage tanks with concrete - Google Patents

Method of coating storage tanks with concrete Download PDF

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Publication number
GB2360472A
GB2360472A GB0007035A GB0007035A GB2360472A GB 2360472 A GB2360472 A GB 2360472A GB 0007035 A GB0007035 A GB 0007035A GB 0007035 A GB0007035 A GB 0007035A GB 2360472 A GB2360472 A GB 2360472A
Authority
GB
United Kingdom
Prior art keywords
concrete
tank
storage tank
amount
fibres
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0007035A
Other versions
GB0007035D0 (en
Inventor
Timothy Andrew Mcgilp Cope
Terry Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JOSEPH ASH STORAGE TANKS Ltd
RONCOL SERVICES Ltd
SEAQUEST UK Ltd
Original Assignee
JOSEPH ASH STORAGE TANKS Ltd
RONCOL SERVICES Ltd
SEAQUEST UK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JOSEPH ASH STORAGE TANKS Ltd, RONCOL SERVICES Ltd, SEAQUEST UK Ltd filed Critical JOSEPH ASH STORAGE TANKS Ltd
Priority to GB0007035A priority Critical patent/GB2360472A/en
Publication of GB0007035D0 publication Critical patent/GB0007035D0/en
Publication of GB2360472A publication Critical patent/GB2360472A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/48—Arrangements of indicating or measuring devices
    • B65D90/50—Arrangements of indicating or measuring devices of leakage-indicating devices
    • B65D90/501—Arrangements of indicating or measuring devices of leakage-indicating devices comprising hollow spaces within walls
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
    • E04H7/02—Containers for fluids or gases; Supports therefor
    • E04H7/18—Containers for fluids or gases; Supports therefor mainly of concrete, e.g. reinforced concrete, or other stone-like material
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00146—Sprayable or pumpable mixtures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482—Coating or impregnation materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00948—Uses not provided for elsewhere in C04B2111/00 for the fabrication of containers

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Architecture (AREA)
  • Plasma & Fusion (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

A method of encasing a storage tank in concrete comprising the steps of assembling the storage tank in situ and spraying the storage tank with concrete. In a preferred embodiment the concrete 7 contains polypropylene reinforcing fibres in an amount of from 1.2 to 2. 0kg/m<SP>3</SP> concrete and steel fibres in an amount of 25 to 35kg/m<SP>3</SP> concrete. The thickness of the concrete is between 130 and 170mm. The tank of the preferred embodiment is a double skinned tank having an inner skin 2 an outer skin 3 and a cavity 4 between the skins. The outer skin 3 is coated with a waterproof membrane 6 and has protruding lugs 5.

Description

2360472 Method of Coating Storage Tanks With Concrete The present
invention relates to a method of coating storage tanks with concrete to protect them from damage.
It is known to store hydrocarbonaceous liquids such as petrol in storage tanks situated underground to protect them from physical damage and reduce the risk of fire. However, it has been noted that leaks can occur in underground storage tanks and can go unnoticed for sometime leading to environmental problems.
In order that tanks can be monitored for leaks it has become more appropriate to use above ground storage tanks. Such above ground storage tanks must be protected from physical damage and the risk of fire.
It is known to encase storage tanks for use above ground, particularly for storing hydrocarbonaceous materials, in concrete to provide the required protection for the tank.
Convault Florida produce a range of above ground storage tanks made of steel and encased in a layer of concrete about 15.24cm (6 inches) thick.
Such tanks once manufactured are of course extremely heavy and are therefore costly and difficult to transport and install.
Trusco Tank Inc. provide a storage tank having a double wall assembly with a space about 15.24cm (6 inches) wide between the walls filled with concrete. The same problems are encountered with the Trusco Tank Inc.
storage tank as with the Convault tank.
The above-mentioned tanks are manufactured completely in the factory and then transported to the site for installation.
2 It would be advantageous to provide a concrete encased storage tank of any desired size whilst avoiding the problems of cost and transportation incurred with the prior art designs.
Accordingly the present invention provides a method of encasing a storage tank in concrete comprising the steps of:
assembling the storage tank in situ; and spraying the exterior of the storage tank with concrete.
The storage tank is preferably a double skinned storage tank. The cavity between the inner and outer skins is preferably filled with a leak detection fluid.
Preferably the concrete contains reinforcing fibres, most preferably polypropylene reinforcing fibres. The reinforcing fibres are preferably present in an amount of from 1.2 to 2.0kg/m' concrete, most preferably 1. 8kg/m' concrete.
The concrete preferably also contains steel fibres in an amount of from 25 to 35kg/mI, most preferably 30kg/m' concrete. Examples of suitable concretes are Emaco 588C or Shotpatch 12 supplied by Feb MBT.
The thickness of the concrete layer may be from 130 to 170mm, preferably 150mm. The concrete is applied -in amounts of from 335 to 355kg/m' to achieve the required thickness. An accelerator may be added to the concrete to achieve the required build.
The exterior of the tank may be provided with protruding lugs to aid adherence of the concrete.
3 The exterior of the tank preferably also has connections for pipes and fittings welded thereto. The connections are of sufficient length to protrude through the concrete when applied.
A layer of non-flammable waterproofing membrane is preferably applied to the exterior of the tank before application of the concrete layer. The waterproofing membrane is preferably applied by spraying. The membrane acts as a seal between the steel and the concrete and allows for small movement by expansion or contraction.
The use of spraying to apply a concrete coating to a storage tank particularly for use in storing hydrocarbon aceou s liquids enables the tank to be made, transported and installed prior to the application of the concrete coating which greatly increases the weight of the tank and therefore the cost of any subsequent transportation.
The invention will now be further described by means of example only with reference to the drawing in which:
Figure 1 illustrates a section through the storage tank of the present invention.
Figure 1 shows a cross section through a wall 1 of a storage tank of the present invention. The tank has an inner skin 2-made of steel and an outer skin 3 spaced apart from the inner skin 2 and also made from steel. The space 4 between the inner skin 2 and outer skin 3 is filled with a leak detection fluid containing corrosion resistant proportions such as Masterfrost manufactured by Batoyle Ltd. An example of a tank meeting the aforementioned description is the double skinned tank made by
4 Joseph Ash Limited. The outer skin 3 has welded thereto at a number of spaced apart locations outwardly extending lugs 5 having upturned end portions 5a. The lugs 5 are made from steel. The outer skin 3 is coated with an elastic non-flammable membrane 6 which waterproofs the tank. A 5 suitable membrane is Mastersealo' 340F of Master Builders Technologies. The non-flammable membrane is then coated with a layer of concrete 7. The lugs 5 aid the adherence of the concrete to the membrane coated outer skin 3.
The inner and outer skins and the protruding lugs are made from carbon steel to BS EN 10 025 1993 FE 430A specification.
The concrete forming coating 7 may be Emaco 588C or Shotpatch 12 supplied by Feb MBT containing reinforcing polypropylene fibres in an amount of 1.5kg/M3 and steel fibres in an amount of 30kg /M3.
The concrete is applied to a thickness of 15Omm or in an amount of 345kg IM3.
To construct the tank shown in section in Figure 1 a double skinned tank of the type described has L-shaped lugs 5 welded thereto at spaced apart intervals suitable to key the concrete thereto. The welding complies with B5 5135 1984.
The surfaces of the tank are cleaned by wire brushing and solvent degreasing.
The non-flammable waterproofing membrane is then applied to the tank by spraying at a distance of 0.5 - 1 metres in parallel strokes using a 30 pneumatic differential piston pump. The pump is placed directly in the container of material and the material is pumped via a 2.54cm (1 inch) hose to a nozzle where compressed air is added. The total consumption of compressed air is maximum 2m11min at 8 bar. The material consumption is from 4 to 7kg/m' and the final dry membrane thickness is 6mm. The 5 membrane is allowed to dry for 3 days.
The layer of concrete 7 is applied to the tank by means of spraying over the non-flammable waterproofing membrane. The pump used can be, for example, the Meyco Deguna or Allentown Powercreter AP-10 of Seaquest UK Ltd. The concrete/fibre mix is applied to a thickness of 150mm.
All of the connections to the tank are installed via the top of the tank and protrude through the concrete encasement. The connections are welded to the steel tank when it is constructed and are of sufficient length to protrude through the concrete once it has been applied. The various fittings are then bolted or screwed to the tank connections.
6

Claims (15)

1. A method of encasing a storage tank in concrete comprising the steps of:
assembling the storage tank in situ; and spraying the exterior of the storage tank with concrete.
2. A method according to claim 1 wherein the concrete contains reinforcing fibres.
3. A method according to claim 2 wherein the reinforcing fibres are polypropylene reinforcing fibres.
4. A method according to claim 2 or claim 3 wherein the reinforcing fibres are present in an amount of from 1.2 to 2.Okg /M3 concrete.
5. A method according to claim 4 wherein the reinforcing fibres are present in an amount of 1.8kg/m' concrete.
6. A method according to any preceding claim wherein the concrete contains steel fibres in an amount of from 25 to 35kg/M3.
7. A method according to claim 6 wherein the concrete contains steel fibres in an amount of 30kg /M3 concrete.
8. A method according to any preceding claim wherein the thickness of the concrete layer is from 130 to 170mm.
9. A method according to claim 8 wherein the thickness of the concrete layer is 15Omm.
7
10. A method according to any preceding claim wherein the concrete is applied in amounts of from 335 to 355kg/m'.
11. A method according to any preceding claim wherein an accelerator 5 is added to the concrete to achieve the required build.
12. A method according to any preceding claim wherein the exterior of the tank is provided with protruding lugs to aid adherence of the concrete.
13. A method according to any preceding claim wherein a layer of nonflammable waterproofing membrane is applied to the exterior of the tank before application of the concrete layer.
14. A method according to claim 13 wherein the waterproofing 15 membrane is applied by spraying.
15. A method of encasing a storage tank in concrete substantially as described herein.
GB0007035A 2000-03-24 2000-03-24 Method of coating storage tanks with concrete Withdrawn GB2360472A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0007035A GB2360472A (en) 2000-03-24 2000-03-24 Method of coating storage tanks with concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0007035A GB2360472A (en) 2000-03-24 2000-03-24 Method of coating storage tanks with concrete

Publications (2)

Publication Number Publication Date
GB0007035D0 GB0007035D0 (en) 2000-05-10
GB2360472A true GB2360472A (en) 2001-09-26

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Family Applications (1)

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GB0007035A Withdrawn GB2360472A (en) 2000-03-24 2000-03-24 Method of coating storage tanks with concrete

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006012855A1 (en) 2004-07-26 2006-02-09 Frank Dupre Method for producing an infrastructure channel

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2033250A (en) * 1978-10-03 1980-05-21 Tac Construction Materials Ltd Insulative Coatings by Spraying
US4421797A (en) * 1980-09-16 1983-12-20 Pressbau Gmbh Method and device for the dry-spray application of concrete to a substrate
JPS5912784A (en) * 1982-07-15 1984-01-23 Daito Kogyo Kk Heat-insulating treatment of reservoir tank or the like
GB2210565A (en) * 1987-10-02 1989-06-14 Sandoz Ltd Spraying resin-containing concrete
GB2216140A (en) * 1988-01-13 1989-10-04 John Avery Edwards A method and design for corrosion protection coating system for application to ferrous and non-ferrous metals and concrete/cementitious surfaces
WO1998001402A1 (en) * 1996-07-08 1998-01-15 3055515 Canada Inc. Preparing shotcrete
JPH1111678A (en) * 1997-06-27 1999-01-19 F Ii Kogyo Kk Device for supplying fixed amount of cement

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2033250A (en) * 1978-10-03 1980-05-21 Tac Construction Materials Ltd Insulative Coatings by Spraying
US4421797A (en) * 1980-09-16 1983-12-20 Pressbau Gmbh Method and device for the dry-spray application of concrete to a substrate
JPS5912784A (en) * 1982-07-15 1984-01-23 Daito Kogyo Kk Heat-insulating treatment of reservoir tank or the like
GB2210565A (en) * 1987-10-02 1989-06-14 Sandoz Ltd Spraying resin-containing concrete
GB2216140A (en) * 1988-01-13 1989-10-04 John Avery Edwards A method and design for corrosion protection coating system for application to ferrous and non-ferrous metals and concrete/cementitious surfaces
WO1998001402A1 (en) * 1996-07-08 1998-01-15 3055515 Canada Inc. Preparing shotcrete
JPH1111678A (en) * 1997-06-27 1999-01-19 F Ii Kogyo Kk Device for supplying fixed amount of cement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006012855A1 (en) 2004-07-26 2006-02-09 Frank Dupre Method for producing an infrastructure channel
NO338129B1 (en) * 2004-07-26 2016-08-01 Dupre Frank Method of manufacturing an infrastructure channel.

Also Published As

Publication number Publication date
GB0007035D0 (en) 2000-05-10

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