WO1996033142A1 - Process for producing a construction element incorporating mineral wool - Google Patents
Process for producing a construction element incorporating mineral wool Download PDFInfo
- Publication number
- WO1996033142A1 WO1996033142A1 PCT/FR1996/000594 FR9600594W WO9633142A1 WO 1996033142 A1 WO1996033142 A1 WO 1996033142A1 FR 9600594 W FR9600594 W FR 9600594W WO 9633142 A1 WO9633142 A1 WO 9633142A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fibers
- clay
- waste
- products
- mineral wool
- Prior art date
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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/16—Lean materials, e.g. grog, quartz
-
- 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
- C04B33/00—Clay-wares
- C04B33/36—Reinforced clay-wares
Definitions
- the invention relates to a method of manufacturing building elements of the brick or tile type based on baked clay incorporating a certain amount of mineral wool, as well as to the building elements in question.
- waste is also economically advantageous.
- the inventors have also shown that this same use has other advantageous side effects such as limiting shrinkage on drying or leading to products with reduced density for unchanged mechanical performance.
- the incorporation of the abovementioned waste also leads to faster drying of the raw bricks or tiles and to an improvement in the mechanical properties of the bricks or tiles, in particular in the uncooked state.
- the waste from the mineral wool industry which can be used can be very diverse. They can be scrap or by-products from manufacturing or used products, etc. They must essentially allow a convenient incorporation in the clay and lead to an easily crumbly non-friable dough.
- Such products are in particular the fibers recovered in the washing water which is used permanently in the production installations, in particular on the conveyors and on the walls of the enclosures in which the newly formed fibers are collected. The fibers entrained by these washing waters are recovered in particular by decantation or filtration in the form of wet cakes.
- any mineral wool material is suitable for implementing the invention. Those are very widely the insulating products themselves or fragments thereof which constitute a significant fraction of the wool produced.
- the possibility of incorporation depends mainly on the dimensions of the particles introduced into the clay. There is also the possibility of incorporating the content of fibers introduced.
- scrap or by-products from manufacturing in the mineral wool production industry constitute the most important source of material for the implementation of the invention
- another source consists of used materials, which these are used insulation application products or more particularly used horticultural substrates made of mineral wool.
- These latter products which are widely used for soilless crops, are renewed periodically, among others every year or every two years. After one or more cultures, they no longer have the necessary qualities, in particular sterility. Users must be rid of these very bulky materials which they no longer use.
- these products have been landfilled or used as industrial fill. Their ability to integrate into a clay paste - they are indeed very easily wettable - makes them products well suited for the implementation of the invention, these products being more specially adapted for the manufacture of elements of brick type construction.
- mineral wool waste is mixed with wet clay in the form of either unbound fibers, such as those recovered in washing water, or in the form of small felt particles.
- the latter case is notably that of products recovered after use and which are originally in the form of felts.
- the felt is, in this case, shredded or ground to form particles whose dimensions are such that they do not prevent a homogeneous mixture with the clay in the presence of water in quantity adequate.
- suitable particle sizes are usually less than 20 mm and preferably less than 10 mm. Under these conditions, regardless of their initial structure, kneading in the clay paste which aims at good homogenization, results in good dissociation of these particles.
- these also preferably have a length of between 0.5 and 2 mm to facilitate in particular their dosage and the mixing with the clay.
- the fibers used also have a diameter preferably less than 7
- the rate of mineral wool introduced into the clay can vary appreciably depending on the importance of the desired effect, the exact nature of the fibrous material, the possible foreign elements it contains, the moisture content of the paste used. , the nature of the clay used and the type of brick or tile to obtain, etc.
- the weight of mineral wool material does not exceed 25% of the total dry weight of the mixture. Preferably, this percentage is less than 15%.
- the fiber content is normally not less than 0.5% and, preferably, not less than 2% by weight, or even 4% by weight.
- the mineral wool waste used is glass wool waste.
- the inventors have also noted the advantage in the composition of the glass fibers used to have a certain amount of boron.
- the boron content of these fibers is at least equal to 0.4% and preferably 0.5%.
- the compositions canopies used in the manufacture of insulation wool contain boron contents of the order of 2 to 20% and, most frequently, from 4 to 1 5% and are well suited to the use corresponding to the invention.
- the boron level is around 0.5%.
- the boron content of the fibers is less than 8%
- the waste is glass wool waste having the following composition expressed in weight percentages:
- the preparation of the mineral clay / wool (or fibers) mixture essentially requires a mixing of the constituents.
- the incorporation can be done gradually to ensure better homogeneity of the dough.
- the clay / fibers mixture may require a slightly higher water content to maintain adequate plasticity.
- the incorporated waste has a density greater than 150 kg / m 3 so that it can easily be extracted from their storage device, be dosed and allow regular feeding at the level of the manufacturing process, and have a density less than 500 kg / m 3 so as to allow a homogeneous mixture with the clay.
- the mineral fibers are distributed without preferential direction inside the bricks or tiles.
- the incorporation of the mineral wool waste according to the invention is particularly advantageous in the case where the bricks or tiles are based on limestone (s) or calcariferous clay (s).
- the use of mineral wool waste according to the invention makes it possible in particular to lower the frost sensitivity of bricks or tiles based on such clays. It is also observed that the volume porosity (pore volume over total volume) of the bricks or tiles obtained according to the invention increases by at least 5% compared to the porosity of bricks or tiles without mineral wool waste and that the range of pore size (porometric spreading) within bricks or tiles is larger.
- the prepared products were the subject of a study on their drying behavior.
- a first determination is that of the humidity diffusion coefficient (K) by the "Pfefferkorn" test. This measure compares the ability of the products to dry. The higher the coefficient, the easier the drying of the products.
- the respective rates of A, B and C are: 4, 1; 4.7 and 4.9.
- the measurement of the porosity of the products also reveals a higher porosity for the products loaded with glass wool.
- the density of dry products is also sensitive to the incorporation of fibers. It is still established, for products A, B and C, at 1,975, 1,645 and 1,800 kg / m 3 . The products prepared with glass wool are therefore appreciably of lower density.
- the presence of glass wool in the clay also changes the dimensional stability on drying.
- the shrinkage of the dry product relative to its dimensions in the wet state in% is respectively 7.8; 3.7 and 5.5.
- the products obtained by incorporating glass fibers are deformed less, despite the fact indicated above that the dough originally contains more water.
- clay / glass fiber mixtures therefore lead to better drying and a lower risk of deformation or cracking.
- Test pieces of the three products were prepared to study their mechanical characteristics. This test was carried out on dry products which have not undergone cooking. The breaking strength at three-point bending is 1,510, 1,860 and 1,760 N, respectively. The presence of the fibers therefore very significantly increases the resistance to bending.
- thermomechanical analysis in the course of cooking.
- the samples are placed in an oven to which a temperature increasing over time is applied at a rate of 1 ° C / min.
- the dimensional variations follow the evolution of cooking.
- the degree of cooking is compared by the withdrawal rate. We set a withdrawal value of 1% and compare the temperatures corresponding to these withdrawals.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96915054A EP0770045A1 (en) | 1995-04-21 | 1996-04-18 | Process for producing a construction element incorporating mineral wool |
PL96317831A PL317831A1 (en) | 1995-04-21 | 1996-04-18 | Method of manufacturing a mineral wool containing structural component |
NO965251A NO965251L (en) | 1995-04-21 | 1996-12-09 | Process for producing an instructional element containing mineral wool |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE9500369 | 1995-04-21 | ||
BE9500369A BE1009303A3 (en) | 1995-04-21 | 1995-04-21 | Bricks including the glass wool. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996033142A1 true WO1996033142A1 (en) | 1996-10-24 |
Family
ID=3888940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1996/000594 WO1996033142A1 (en) | 1995-04-21 | 1996-04-18 | Process for producing a construction element incorporating mineral wool |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0770045A1 (en) |
BE (1) | BE1009303A3 (en) |
CZ (1) | CZ379096A3 (en) |
NO (1) | NO965251L (en) |
PL (1) | PL317831A1 (en) |
WO (1) | WO1996033142A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998049119A1 (en) * | 1997-04-30 | 1998-11-05 | Nyco Minerals, Inc. | Reinforcement of ceramic bodies with wollastonite |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1471528A1 (en) * | 1961-11-01 | 1969-05-29 | Wood Conversion Co | Integrated ceramic body |
AU498863B2 (en) * | 1976-03-15 | 1979-03-29 | Aci Australia Limited | Reinforced clays |
EP0288070A2 (en) * | 1987-04-24 | 1988-10-26 | Arturo Broggini | Clay-containing material and method for its preparation |
DE9110539U1 (en) * | 1991-08-26 | 1991-10-17 | Glaswerk Schuller Gmbh, 6980 Wertheim, De |
-
1995
- 1995-04-21 BE BE9500369A patent/BE1009303A3/en not_active IP Right Cessation
-
1996
- 1996-04-18 WO PCT/FR1996/000594 patent/WO1996033142A1/en not_active Application Discontinuation
- 1996-04-18 CZ CZ963790A patent/CZ379096A3/en unknown
- 1996-04-18 PL PL96317831A patent/PL317831A1/en unknown
- 1996-04-18 EP EP96915054A patent/EP0770045A1/en not_active Withdrawn
- 1996-12-09 NO NO965251A patent/NO965251L/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1471528A1 (en) * | 1961-11-01 | 1969-05-29 | Wood Conversion Co | Integrated ceramic body |
AU498863B2 (en) * | 1976-03-15 | 1979-03-29 | Aci Australia Limited | Reinforced clays |
EP0288070A2 (en) * | 1987-04-24 | 1988-10-26 | Arturo Broggini | Clay-containing material and method for its preparation |
DE9110539U1 (en) * | 1991-08-26 | 1991-10-17 | Glaswerk Schuller Gmbh, 6980 Wertheim, De |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998049119A1 (en) * | 1997-04-30 | 1998-11-05 | Nyco Minerals, Inc. | Reinforcement of ceramic bodies with wollastonite |
US6037288A (en) * | 1997-04-30 | 2000-03-14 | Robinson; Sara M. | Reinforcement of ceramic bodies with wollastonite |
Also Published As
Publication number | Publication date |
---|---|
EP0770045A1 (en) | 1997-05-02 |
CZ379096A3 (en) | 1997-05-14 |
NO965251D0 (en) | 1996-12-09 |
NO965251L (en) | 1996-12-09 |
PL317831A1 (en) | 1997-04-28 |
BE1009303A3 (en) | 1997-02-04 |
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