EP0051498B1 - Process for the preparation of manufactured products based on hydraulic binders - Google Patents
Process for the preparation of manufactured products based on hydraulic binders Download PDFInfo
- Publication number
- EP0051498B1 EP0051498B1 EP81305249A EP81305249A EP0051498B1 EP 0051498 B1 EP0051498 B1 EP 0051498B1 EP 81305249 A EP81305249 A EP 81305249A EP 81305249 A EP81305249 A EP 81305249A EP 0051498 B1 EP0051498 B1 EP 0051498B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- film
- water
- films
- binder
- weight
- 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.)
- Expired
Links
- 239000011230 binding agent Substances 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 22
- 238000002360 preparation method Methods 0.000 title description 4
- 239000010408 film Substances 0.000 claims description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 239000000470 constituent Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000008240 homogeneous mixture Substances 0.000 claims description 2
- 238000009489 vacuum treatment Methods 0.000 claims description 2
- 239000004568 cement Substances 0.000 description 15
- 239000000047 product Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 206010061592 cardiac fibrillation Diseases 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002600 fibrillogenic effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000004572 hydraulic lime Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 150000003755 zirconium compounds Chemical class 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/0006—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects the reinforcement consisting of aligned, non-metal reinforcing elements
Definitions
- the present invention relates to a process for the preparation of manufactured products based on hydraulic binders, provided with a reinforcement of a fibrilled synthetic polymeric material.
- PCT Specification No. WO.80/ 01888 discloses a process of manufacturing construction products comprising the steps of feeding dry constituents including a liquid-setting powder and a reinforcement thereof into a moulding zone, compacting the constituents in such zone, exposing at least one upstanding surface of the compacted constituents and applying to that surface a predetermined quantity of setting liquid, being a quantity sufficient to wet all of the compacted constituents.
- British Specification No. GB-A-2034627 discloses a process for producing reinforced articles made from a hydraulic material, e.g. cement, and a fibrillated film network, e.g. polypropylene, including the steps of placing a so-called mattress formed by a multiplicity of layers of fibrillated film in a mould, applying the hydraulic material to the mattress, de-watering the hydraulic material and removing the article from the mould.
- a hydraulic material e.g. cement
- a fibrillated film network e.g. polypropylene
- the present invention provides a process for preparing a manufactured product based on a hydraulic binder and containing a reinforcement of synthetic polymeric material, the process comprising:
- the assembly thus obtained by said operation (d) or by the combination of said operations (c) and (d) may be subjected to a treatment under vacuum for the removal of any excess water.
- a series of said operations (a) to (d) may be repeated on the non-compressed product obtained from a preceding series of operations (a) to (d), until there is obtained a manufactured product, for example a plate, of the required thickness, the compression operation being subsequently applied to obtain the finished or end product.
- the vacuum treatment may be carried out at the end of each series of operations (a) to (d), or before the final compression operation.
- the fibrilled films usable in the present invention may be made of any orientable synthetic polymer, and are prepared by fissuring or splitting a mono-oriented film, for example by means of heated reliefs, points or blades, and by stretching the film thus obtained crosswise, thus conferring to it a netlike structure.
- the film may also incorporate a suitable filler, such as a zirconium compound, a diatomite, or a cement mix, as described in Italian patent application Nos. 26463/79 and 26861/79.
- a suitable filler such as a zirconium compound, a diatomite, or a cement mix, as described in Italian patent application Nos. 26463/79 and 26861/79.
- All known hydraulic binders such as Portland cements, aluminous cements, hydraulic limes, and chalk, may be used in the process of the present invention.
- One advantage of the process according to the present invention in comparison with the preparation from aqueous mixes of binders, is that of using only the quantity of water necessary for the development of the hydration of the binder, or a quantity only slightly greater, and consequently a considerable reduction in the installation costs and the energy consumption of the process may be achieved.
- the number of superimposed fibrilled films, ' used in one distribution of the hydraulic binder according to operation (a), is preferably from 2 to 100.
- the quantity by weight of fibrilled film utilized is preferably from 2% to 7.5% by weight of the weight of the hydraulic binder, considered in the dry state.
- the quantity of the water added in the operation (c) is from 12% to 30% by weight based on the weight of the binder in the dry state.
- This package was then placed into a suitable mold and strewn with Portland cement powder by means of a powder-dispenser which, according to known techniques, spread uniformly over the whole 50 x 50 cm plane a quantity of 650 g of cement, while simultaneously carrying out a slight vibratory motion to promote easy penetration by the cement powder into the package.
- the net uniformly dispersed with the cement was sprinkled uniformly by means of a set of drizzling nozzles with 130 cc of water, corresponding to a water/cement ratio of 23%.
- the water was additioned with a cement super- fluidizer (Melment 10 of SKW in a 20% concentration) in a ratio of 13 g per 130 cc of water.
- a cement super- fluidizer Melment 10 of SKW in a 20% concentration
- the assembly thus obtained was subjected to lateral vibrations by means of mechanical vibrators, andto a downward compacting action with a compacting blade connected to a vibrator, according to known techniques in the field of cement processing.
- the assembly was subjected to a vacuum of 200 mmHg for about 1 minute, thereby extracting 200 cc of water; the impregnated plate formed was thereupon removed from the mold, compressed at a pressure of 45 kg/sq.cm and finally allowed to age and harden for 28 days.
- the package was formed by a total of 40 nets, arranged in groups or batches of 10 nets with their main reticular axes, derived from the fibrillation, at 90° to each other, so as to impart to the cement plate to be prepared a mechanical iso- tropy.
- the package was then dispersed uniformly with 1730 g of dry Portland cement powder as in the preceding example; the mold was then subjected to a slight vibration in order to facilitate penetration of the cement into the meshes of the nets.
- the mold was then subjected to a vacuum of about 200 mmHg for about 1 minute, removing thereby about 100 cc of water and thus reducing the excess water contained in the net-cement mass to about 13% of the cement.
- the plate was then compressed under a pressure of 45 kg/sq.cm and was then allowed at age and harden for 28 days.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- General Preparation And Processing Of Foods (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT25768/80A IT1141089B (it) | 1980-11-05 | 1980-11-05 | Procedimento per preparare manufatti a base di leganti idraulici,rinforzati con film polimerici fibrillati |
| IT2576880 | 1980-11-05 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0051498A2 EP0051498A2 (en) | 1982-05-12 |
| EP0051498A3 EP0051498A3 (en) | 1983-07-20 |
| EP0051498B1 true EP0051498B1 (en) | 1987-09-16 |
Family
ID=11217671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81305249A Expired EP0051498B1 (en) | 1980-11-05 | 1981-11-04 | Process for the preparation of manufactured products based on hydraulic binders |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0051498B1 (it) |
| DE (1) | DE3176447D1 (it) |
| DK (1) | DK488381A (it) |
| ES (1) | ES8302524A1 (it) |
| IT (1) | IT1141089B (it) |
| YU (1) | YU262181A (it) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK17592A (da) * | 1992-02-13 | 1993-08-14 | Inge Bodil Elmstroem Soerensen | Gipsplade til lydabsorption samt fremgangsmaade til fremstilling af en saadan gipsplade |
| US5476617A (en) * | 1993-02-19 | 1995-12-19 | The Board Of Regents Of The University Of Wisconsin | Rotational and vibrational process for molding cellulosic fibers |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1130612A (en) * | 1966-08-15 | 1968-10-16 | Shell Int Research | The manufacture of a water-hardenable mass; the manufacture of articles therefrom; and the resulting articles and use thereof |
| DE2409231A1 (de) * | 1974-02-27 | 1975-09-04 | Heidelberg Portland Zement | Verfahren zur herstellung von durch anorganische bindemittel verfestigten und durch mineralfasern verstaerkten raumformkoerpern |
| NO781562L (no) * | 1977-05-05 | 1978-11-07 | Eternit Fab Dansk As | Fiberarmerte bygningsprodukter. |
| NL7714571A (nl) * | 1977-12-30 | 1979-07-03 | Stamicarbon | Werkwijze voor het vervaardigen van voorwerpen uit met water hardend materiaal. |
| US4297414A (en) * | 1978-07-07 | 1981-10-27 | Mitsui Petrochemical Industries, Ltd. | Reinforcing material for hydraulic substances and method for the production thereof |
| GB2034627A (en) * | 1978-11-04 | 1980-06-11 | Dow Mac Concrete Ltd | Process for moulding reinforced articles from a hydraulic binder |
| WO1980001888A1 (en) * | 1979-03-05 | 1980-09-18 | Bevan Ass C G | Moulding of construction products |
-
1980
- 1980-11-05 IT IT25768/80A patent/IT1141089B/it active
-
1981
- 1981-11-04 DK DK488381A patent/DK488381A/da unknown
- 1981-11-04 YU YU02621/81A patent/YU262181A/xx unknown
- 1981-11-04 DE DE8181305249T patent/DE3176447D1/de not_active Expired
- 1981-11-04 EP EP81305249A patent/EP0051498B1/en not_active Expired
- 1981-11-04 ES ES506825A patent/ES8302524A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE3176447D1 (en) | 1987-10-22 |
| YU262181A (en) | 1983-02-28 |
| EP0051498A2 (en) | 1982-05-12 |
| EP0051498A3 (en) | 1983-07-20 |
| IT8025768A0 (it) | 1980-11-05 |
| IT1141089B (it) | 1986-10-01 |
| ES506825A0 (es) | 1983-02-01 |
| DK488381A (da) | 1982-05-06 |
| ES8302524A1 (es) | 1983-02-01 |
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