GB2093818A - Damp control rendering - Google Patents
Damp control rendering Download PDFInfo
- Publication number
- GB2093818A GB2093818A GB8106000A GB8106000A GB2093818A GB 2093818 A GB2093818 A GB 2093818A GB 8106000 A GB8106000 A GB 8106000A GB 8106000 A GB8106000 A GB 8106000A GB 2093818 A GB2093818 A GB 2093818A
- Authority
- GB
- United Kingdom
- Prior art keywords
- weight
- composition according
- clay material
- fatty acid
- alkali metal
- 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.)
- Granted
Links
- 238000009877 rendering Methods 0.000 title claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000004927 clay Substances 0.000 claims abstract description 21
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 11
- -1 alkali metal salt Chemical class 0.000 claims abstract description 11
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 11
- 239000000194 fatty acid Substances 0.000 claims abstract description 11
- 229930195729 fatty acid Natural products 0.000 claims abstract description 11
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 11
- 239000011490 mineral wool Substances 0.000 claims abstract description 11
- 239000004568 cement Substances 0.000 claims abstract description 10
- 239000002657 fibrous material Substances 0.000 claims abstract description 10
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 9
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 9
- 239000004571 lime Substances 0.000 claims abstract description 9
- 239000004576 sand Substances 0.000 claims abstract description 9
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 8
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 5
- 230000035515 penetration Effects 0.000 claims abstract description 5
- 229940096992 potassium oleate Drugs 0.000 claims abstract description 5
- MLICVSDCCDDWMD-KVVVOXFISA-M potassium;(z)-octadec-9-enoate Chemical compound [K+].CCCCCCCC\C=C/CCCCCCCC([O-])=O MLICVSDCCDDWMD-KVVVOXFISA-M 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 8
- 229910052622 kaolinite Inorganic materials 0.000 claims description 7
- 229910052618 mica group Inorganic materials 0.000 claims description 7
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052900 illite Inorganic materials 0.000 claims description 6
- 239000010445 mica Substances 0.000 claims description 6
- 229910052627 muscovite Inorganic materials 0.000 claims description 6
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 239000002734 clay mineral Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 229910052613 tourmaline Inorganic materials 0.000 description 1
- 239000011032 tourmaline Substances 0.000 description 1
- 229940070527 tourmaline Drugs 0.000 description 1
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
- 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
- C04B28/10—Lime cements or magnesium oxide cements
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A damp-control rendering for alleviating the effects of penetration of moisture into the walls of buildings comprises a mixture of sand, cement and lime with a kaolin-rich clay material, an inert fibrous material such as a mineral wool and an alkali metal salt of an organic fatty acid such as potassium oleate.
Description
SPECIFICATION
Damp control rendering
This invention relates to damp-control renderings, that is to say compositions for rendering walls of buildings to reduce the problems caused by the penetration of moisture.
Known rendering compositions of sand, cement and lime, applied as an aqueous mixture, do not in practice give much protection against damp. It is common knowledge that old houses built without damp-proof courses frequently suffer from damp in spite of the application of such renderings to the inside of the walls.
According to the present invention a composition for rendering walls of buildings to reduce the effects of penetration of moisture comprises a mixture of sand, cement and lime, together with at least 1 5% of a kaolin-rich clay material, at least 5% by weight of an inert fibrous material and at least 1% by weight of an alkali metal salt of an organic fatty acid. Preferably the inert fibrous material is a mineral wool.
It has surprisingly been found in practice that the combination of the clay material, the insert fibrous material such as mineral wool and the alkali metal salt of a fatty acid, confers extremely effective moisture control characteristics on the composition. The inert fibrous material also improves the thermal insulation properties, while the alkali metal salt of a fatty acid is known to act in such situations as an inhibitor to the growth of deleterious salts.
Preferably the proportions of the components in the mixture are within the following ranges:
Sand 15 to 30% by weight
Cement 1 5 to 30% by weight
Lime 15 to 30% by weight
Kaolin-rich clay material 1 5 to 30% by weight
Inert fibrous material 5 to 1 5% by weight
Alkali metal salt of fatty acid 1 to 5% by weight
The most preferred compositions comprise:
Sand 20 to 25% by weight
Cement 20 to 25% by weight
Lime 20 to 25% by weight
Kaolin-rich clay material 20 to 25% by weight
Mineral wool 8 to 10% by weight
Alkali metal salt of fatty acid 1 to 5% by weight
The composition will generally be mixed with approximately one-half of its weight of water for application to a wall.The amount of water may be slightly less (say 48% by weight) where a stiff mix is required for use on difficult surfaces, or slightly more (say 52% by weight) where a wet mix is required for normal surfaces.
It is preferred that from 20% to 80% by weight of the clay material has a particle size greater than 75 microns, and less than 60% has a particle size less than 40 microns in diameter. More preferably, from 30% to 60% of the clay material has a particle size greater than 75 microns and less than 30% has a particle size less than 40 microns in diameter.
The preferred kaolin-rich clay material is a material in which the dominant clay mineral is kaolinite, with either muscovite and/or hydrous mica and/or illite and with quartz and/or tourmaline as associate minerals. Illite is a general term for the clay mineral constituent of argillaceous sediments belonging to the mica group. The clay material preferably has a total SiO2 content of 50% to 85%, advantageously from 67% to 77% by weight.
The clay material preferably has a content of kaolinite of from 1 5% to 60% by weight, and a total content of muscovite and/or hydrous mica and/or illite of from 8% to 40% by weight. The particularly preferred clay material has a content of kaolinite of from 30% to 45% by weight and a total content of muscovite and/or hydrous mica and/or illite of from 10% to 30% by weight.
The preferred alkali metal salt of an organic fatty acid is potassium oleate, which is preferably present in a proportion of approximately 3% by weight.
A preferred embodiment of the invention will now be described in more detail by way of example.
In this embodiment, a dry mix is made of the following components in the quantities specified:
Sand 5.50 kgs.
Cement 5.50 kgs.
Lime 5.50 kgs.
Kaolinite clay material containing 5.50 kgs.
Silica 70.6% by weight
Material above 75 microns 44% by weight
Material below 40 microns 22% by weight
Kaolinite 37% by weight
Muscovite and hydrous mica (Total) 15% by weight
Mineral wool (sold under the Registered Trade Mark SPINROCK FOB 2.70 kgs.
by Rockwool International A/S)
Potassium oleate (0.7 litres) 0.66 kgs.
25.36 kgs.
The dry mix is homogenised in a suitable high shear mixing apparatus, e.g. of the Eirich type. The resuiting dry mixture when required for use on a normal surface is mixed into 1 3 litres of water (52% by weight of the dry mix) either by hand or by the use of a suitable rotating pan mixer, e.g. a conventional cement mixer. For difficult surfaces where a stiffer mix is required, the amount of water may be reduced to 12 litres (48% by weight). The resultant composition is then applied to the exposed masonry of the moisture-affected internal wall surface (after removal of existing conventional renderings and finishes).
The composition is applied in the conventional manner using normal rendering and plastering tools and is allowed to dry and cure. After a partial set of the applied composition has taken place further trowelling or floating to an acceptable finish will be possible.
Tests on the walls of old houses, both with and without damp-proof courses, have shown a remarkable improvement in the effects of dampness in previously afflicted areas.
The composition is normally applied to the internal wall surface but-has also proved effective when applied to the exterior surface.
Various types of mineral wool may be used as the inert fibrous material, for example that sold as granular ROCKWOOL (Registered Trade Mark) by Rockwool Limited, of Pencoed, Bridgend, Mid
Glamorgan, Wales.
Claims (14)
1. A composition for rendering walls of buildings to reduce the effects of penetration of moisture, comprising a mixture of sand, cement and lime, together with at least 1 5% by weight of a kaolin-rich clay material, at least 5% by weight of an inert fibrous material and at least 1% by weight of an alkali metal salt of an organic fatty acid.
2. A composition according to claim 1 wherein the inert fibrous material is a mineral wool.
3. A composition according to claim 1 or 2 wherein the proportions of the components of the mixture are within the following ranges:
Sand 1 5 to 30% by weight
Cement 1 5 to 30% by weight
Lime 1 5 to 30% by weight
Kaolin-rich clay material 1 5 to 30% by weight
Inert fibrous material 5 to 1 5% by weight
Alkali metal salt of fatty acid 1 to 5% by weight
4. A composition according to claim 3 comprising:
Sand 20 to 25% by weight
Cement 20 to 25% by weight
Lime 20 to 25% by weight
Kaolin-rich clay material 20 to 25% by weight
Mineral wool 8 to 10% by weight
Alkali metal salt of fatty acid 1 to 5% by weight
5. A composition according to any one of the preceding claims, mixed with approximately one-half of its weight of water for application to a wall.
6. A composition according to any one of the preceding claims wherein from 20% to 80% by weight of the clay material has a particle size greater than 75 microns and less than 60% has a particle size less than 40 microns in diameter.
7. A composition according to claim 6 wherein from 30% to 60% of the clay material has a particle size greater than 75 microns and less than 30% has a particle size less than 40 microns in diameter.
8. A composition according to any one of the preceding claims wherein the clay material has a total SiO2 content of from 50% to 85% by weight.
9. A composition according to claim 8 wherein the clay material has a total SiO2 content of from 67% to 77% by weight.
1 0. A composition according to any one of the preceding claims wherein the clay material has a content of kaolinite of from 1 5% to 60% by weight and a total content of muscovite and/or hydrous mica and/or illite of from 8% to 40% by weight.
11. A composition according to claim 10 wherein the clay material has a content of kaolinite of from 30% to 45% by weight and a total content of muscovite and/or hydrous mica and/or illite of from 10% to 30% by weight.
12. A composition according to any one of the preceding claims wherein the alkali metal salt of an organic fatty acid is potassium oleate.
1 3. A composition according to claim 12 wherein the potassium oleate is present in a proportion of approximately 3% by weight.
14. A composition for rendering walls of buildings to reduce the effects of penetration of moisture, substantially as hereinbefore described as the specific example.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8106000A GB2093818B (en) | 1981-02-25 | 1981-02-25 | Damp control rendering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8106000A GB2093818B (en) | 1981-02-25 | 1981-02-25 | Damp control rendering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2093818A true GB2093818A (en) | 1982-09-08 |
| GB2093818B GB2093818B (en) | 1984-06-06 |
Family
ID=10519975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8106000A Expired GB2093818B (en) | 1981-02-25 | 1981-02-25 | Damp control rendering |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2093818B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0120800A1 (en) * | 1983-03-28 | 1984-10-03 | "Société des Anciens Etablissements LOUDE Fréres" Société Anonyme dite: | Curable composition, process for its employment and its use, in particular in the stopping of orifices |
| ES2130050A1 (en) * | 1996-08-02 | 1999-06-16 | Consejo Superior Investigacion | Preparation of expanding and water-repellent lime mortars which can be used in the restoration of historic monuments |
| WO2000035832A3 (en) * | 1998-12-15 | 2001-11-29 | Verfuss Gmbh | Material for sealing porous construction surfaces |
| RU2466951C1 (en) * | 2011-07-06 | 2012-11-20 | Юлия Алексеевна Щепочкина | Raw mix to produce artificial rock |
-
1981
- 1981-02-25 GB GB8106000A patent/GB2093818B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0120800A1 (en) * | 1983-03-28 | 1984-10-03 | "Société des Anciens Etablissements LOUDE Fréres" Société Anonyme dite: | Curable composition, process for its employment and its use, in particular in the stopping of orifices |
| FR2544303A1 (en) * | 1983-03-28 | 1984-10-19 | Pascau Jean Maurice | CURABLE COMPOSITION, PROCESS FOR IMPLEMENTING THE SAME, AND APPLICATION IN PARTICULAR TO THE BONDING OF ORIFICES |
| ES2130050A1 (en) * | 1996-08-02 | 1999-06-16 | Consejo Superior Investigacion | Preparation of expanding and water-repellent lime mortars which can be used in the restoration of historic monuments |
| WO2000035832A3 (en) * | 1998-12-15 | 2001-11-29 | Verfuss Gmbh | Material for sealing porous construction surfaces |
| RU2466951C1 (en) * | 2011-07-06 | 2012-11-20 | Юлия Алексеевна Щепочкина | Raw mix to produce artificial rock |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2093818B (en) | 1984-06-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |