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WO1993009069A2 - Composition bitumineuse - Google Patents

Composition bitumineuse Download PDF

Info

Publication number
WO1993009069A2
WO1993009069A2 PCT/GB1992/002014 GB9202014W WO9309069A2 WO 1993009069 A2 WO1993009069 A2 WO 1993009069A2 GB 9202014 W GB9202014 W GB 9202014W WO 9309069 A2 WO9309069 A2 WO 9309069A2
Authority
WO
WIPO (PCT)
Prior art keywords
bitumen
supply
blending
water
aqueous
Prior art date
Application number
PCT/GB1992/002014
Other languages
English (en)
Other versions
WO1993009069A3 (fr
Inventor
Ian Townend
Original Assignee
Ian Townend
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 Ian Townend filed Critical Ian Townend
Priority to GB9408522A priority Critical patent/GB2276100B/en
Publication of WO1993009069A2 publication Critical patent/WO1993009069A2/fr
Publication of WO1993009069A3 publication Critical patent/WO1993009069A3/fr

Links

Classifications

    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/47—Oils, fats or waxes natural resins
    • C04B41/478—Bitumen, asphalt, e.g. paraffin
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
    • C04B41/61—Coating or impregnation
    • C04B41/62—Coating or impregnation with organic materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
    • C08L95/005—Aqueous compositions, e.g. emulsions
    • 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
    • C04B2111/00112—Mixtures characterised by specific pH values
    • 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
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials

Definitions

  • This inventi ⁇ n is C ⁇ ncerned with the f ⁇ rmati ⁇ n ⁇ f a bitumin ⁇ us c ⁇ mp ⁇ siti ⁇ n f ⁇ r applicati ⁇ n t ⁇ a surface in ⁇ rder t ⁇ render the surface resistant tc penetraticn by water by f ⁇ rmaticn cf a membrane therecn.
  • bitumen can be treated in such a way that it can be rendered flowable without requirement for it to be heated prior to application as a coating, and remain highly flexible in cured form, and such that the treated bitumen composition can be applied as a spray when blended with water as a catalyst, thereby increasing significantly the rate of application of the composition to a surface to be treated, and curing immediately to form a membrane thereon.
  • a raw material blended feedstock of bitumen such as a blend of 50 / 200 PEN bitumen
  • bitumen can be heated and then blended with heated water in a predetermined pH range between 8.5 and 12.5 depending on ambient temperatures, and subsequently stored, and which can then subsequently be withdrawn from store and, using a novel spray coating technique, can then be applied to a surface to be treated by a spraying technique to form a rapidly curing membrane on the surface.
  • the invention provides a method of forming a bituminous membrane for application to a surface in order to render the surface resistant to penetration by water and comprising: providing a raw material supply of bitumen, and an aqueous blending supply in a pH range which is at least slightly alkaline; heating the bitumen and the aqueous blending supply and blending them together in a blending unit to form a blended mixture / emulsion; and, storing the blended mixture / emulsion in a flowable form prior to supply to a spray coating device, together with a separate acidic aqueous dispersing supply to the device to form a dispersed spray applicable to said surface.
  • the raw material supply of bitumen comprises a 50 / 200 PEN bitumen blend (preferably Venezuelan bitumen of relatively low acidity), and the aqueous blending supply advantageously has a pH in the range 8.5 bo 12.5, and preferably comprises a supply of blending water treated) by a suitable additive to a required level of alkalinity.
  • bitumen may be used to provide the raw material supply of bitumen.
  • the additive to the blended mixture may be made up of emulsions, soaps and latexes e.g. from a liquid concentrate supply known as EPROPACK 2 (Trade Mark of Epro UK Limited) _
  • the additive components will be selected according to the proportions of "fatty acid” present in the bitumen feedstock, to bring the "fatty acid” prop ⁇ rtion to " a sufficient level and in combination with a required alkalinity, so that the blended mixture can subsequently be stored in flowable form at ambient temperature.
  • the blended mixture also desirably has certain suitable fillers incorporated therein according to the type of bitumen used, e.g.
  • the ratio of bitumen to water, by weight, is preferably in the range 60:40 to 70:30, with the hardness of the finished product being dependent at least partly upon the water proportion, and also upon any additives introduced into the blended mixture.
  • the hardness therefore depends upon the water proportions, and the presence of latexes, soaps and amount of EPROPACK 2 used (Trade Mark of Epro UK Limited).
  • a method of formation of a flowable bituminous composition according to the invention will now be described in detail, by way of example only, with reference to the accompanying drawing, which is a flow diagram showing the treatment of a bitumen feedstock tc f ⁇ rrn a blended mixture suitable for subsequent sprayed application to form a membrane on a surface to be treated.
  • a method of forming a blended mixture of bitumen and water which is at least slightly alkaline (preferably pH range of 8.5 to 12.5) will now be described in detail, which is suitable for subsequent application to a surface to be treated by a spray coating technique.
  • the drawing shows schematically the initial treatment of a blended bitumen feedstock, which is preferably a blend of 50 / 200 PEN Venezuelan bitumen (low acidity), which is heated to about 140°C to 150 * C and then stored in an insulated tank 10.
  • the heated feedstock is then fed to a blending storage tank 11 at which a temperature of about 140"C is maintained, and when required this is then fed to a blending pump 12 via feed line 13, and in addition there is also fed to the pump 12 via feedline 14 an aqueous blending supply comprising heated water from a storage tank 15,- in which the water is heated to about 50 ⁇ C, and is treated e.g. by EPROPACK 2 (Trade mark of Epro UK Limited) to be at least slightly alkaline, preferably in -the pH range 8.5 to 12.5, and to build-up the proportion of "fatty acids" in the blended mixture if necessary.
  • EPROPACK 2 Trade mark of Epro UK Limited
  • the drawing is schematic only, and each component of the blended bitumen supply (50 PEN and 200 PEN) may be heated up in its own supply tank and then delivered to blending tank 11.
  • the blending pump 12 then mixes the raw blend of bitumen feedstock and the blending water, together with fillers and any other necessary ingredients to form a fully blended emulsified product within the blending pump 2, and the blended mixture / emulsion is then discharged via line 16 to a storage tank 17 which holds the blended mixture at an initial temperature maintained of about 95 ⁇ C. The blended mixture is then fed to storage drums 18 for future use at ambient temperature.
  • bitumen to water will vary according to the ultimate flowability requirements, but a ratio of about 60% bitumen to 40% water has been found to be advantageous. However, this ratio is not absolutely critical, and experiments carried out with ratios of 70% bitumen to 30% water have been found to give advantageous results (increasing hardness of the membrane with lowered proportion of water) . It is envisaged that other ratios will give advantage ⁇ us results, as determined by experiments.
  • the blended bitumen / water mixture / emulsion is fed from a storage drum to a dispenser pump (not shown) which then pumps the mixture along a first discharge line to a first discharge head from which issues a pumped stream of the mixture.
  • a dispersing medium e.g. naturally available water treated with an additive, such as EPROLYST 1 or 2 (Trade Mark of Epro UK Limited) to make it slightly acidic
  • the additive to render the dispensing water slightly acidic may include calcium salts, such as calcium chloride, and the required acidity will depend upon the alkalinity of the blended bitumen / water mixture or emulsion
  • the first and second discharge heads are positioned close to each other, and arranged to direct respective streams which converge and meet at a region of impingement at which intimate intermixing, globule to globule, of the respective streams takes place, and a dispersed spray is formed which is applied to the surface which is to be coated and cures immediately. After a period of time, a durable and substantially even bitumen membrane with high flexibility remains firmly adhering to the surface to form a water resistant coating.
  • a flowable bituminous composition can be obtained by the method described above, which can be applied by a spray coating technique at ambient temperature (as compared with existing practice of hot application of asphalt bitumen), and with substantial increase in rates of production of bituminous coatings.
  • coating rates 1500 square meters per day can be achieved, and with a two man output, up to 3000 square meters per day can be achieved, with one man operating the pump.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Road Paving Machines (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Paints Or Removers (AREA)

Abstract

Procédé permettant de former une membrane bitumineuse destinée à être appliquée sur une surface qu'on désire protéger afin que l'eau ne puisse y pénétrer. Dans ce procédé on utilise une charge de matériau brut de bitume tel qu'un mélange de bitume 50/200 PEN, et une charge de mélange aqueux d'eau dont la plage de pH est légèrement alcaline; on chauffe le bitume et la charge de mélange aqueux puis on les mélange dans une unité de mélange pour former un mélange du mélange/émulsion, on stocke ensuite le mélange/émulsion mélangé sous une forme pouvant s'écouler avant de le fournir à un dispositif de revêtement par projection dans lequel on introduit une charge de dispersion aqueuse acide séparée de sorte que deux écoulements du mélange/émulsion mélangé et de la charge de dispersion aqueuse soient incidents pour produire une pulvérisation dispersée qu'on peut appliquer sur la surface devant être traitée.
PCT/GB1992/002014 1991-11-02 1992-11-02 Composition bitumineuse WO1993009069A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9408522A GB2276100B (en) 1991-11-02 1992-11-02 Bituminous composition

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9123378.3 1991-11-02
GB919123378A GB9123378D0 (en) 1991-11-02 1991-11-02 Bituminous composition

Publications (2)

Publication Number Publication Date
WO1993009069A2 true WO1993009069A2 (fr) 1993-05-13
WO1993009069A3 WO1993009069A3 (fr) 1993-06-24

Family

ID=10704032

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1992/002014 WO1993009069A2 (fr) 1991-11-02 1992-11-02 Composition bitumineuse

Country Status (3)

Country Link
AU (1) AU2873792A (fr)
GB (2) GB9123378D0 (fr)
WO (1) WO1993009069A2 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH544728A (de) * 1970-03-06 1973-11-30 Meynadier & Cie Ag Verfahren zur Herstellung einer Isolierschicht zum Abdichten von Bauwerken
DE2018164A1 (en) * 1970-04-16 1971-11-04 Krebber, Jobst, 4330 Mülheim Coagulated bitumen layer
SU1669957A1 (ru) * 1989-04-24 1991-08-15 Рижский политехнический институт им.А.Я.Пельше Битумно-полимерна композици

Also Published As

Publication number Publication date
GB2276100A (en) 1994-09-21
GB9408522D0 (en) 1994-06-22
GB2276100B (en) 1995-10-25
WO1993009069A3 (fr) 1993-06-24
GB9123378D0 (en) 1991-12-18
AU2873792A (en) 1993-06-07

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