WO2002090293A2 - Method of making a finished product from a feedstock, a portland cement, and a thermosetting resin - Google Patents
Method of making a finished product from a feedstock, a portland cement, and a thermosetting resin Download PDFInfo
- Publication number
- WO2002090293A2 WO2002090293A2 PCT/IB2002/001567 IB0201567W WO02090293A2 WO 2002090293 A2 WO2002090293 A2 WO 2002090293A2 IB 0201567 W IB0201567 W IB 0201567W WO 02090293 A2 WO02090293 A2 WO 02090293A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- portland cement
- carbon dioxide
- particles
- product
- cohesive product
- Prior art date
Links
- 239000011398 Portland cement Substances 0.000 title claims abstract description 53
- 229920005989 resin Polymers 0.000 title claims abstract description 28
- 239000011347 resin Substances 0.000 title claims abstract description 28
- 229920001187 thermosetting polymer Polymers 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 108
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 54
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 54
- 239000002245 particle Substances 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000007858 starting material Substances 0.000 claims abstract description 14
- 239000012978 lignocellulosic material Substances 0.000 claims abstract description 13
- 230000036571 hydration Effects 0.000 claims abstract description 12
- 238000006703 hydration reaction Methods 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 9
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 5
- 239000011707 mineral Substances 0.000 claims abstract description 5
- 239000003153 chemical reaction reagent Substances 0.000 claims description 22
- 150000001875 compounds Chemical class 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 8
- 239000010455 vermiculite Substances 0.000 claims description 8
- 229910052902 vermiculite Inorganic materials 0.000 claims description 8
- 235000019354 vermiculite Nutrition 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 7
- 229920003986 novolac Polymers 0.000 claims description 6
- 239000010451 perlite Substances 0.000 claims description 6
- 235000019362 perlite Nutrition 0.000 claims description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 4
- 229920001568 phenolic resin Polymers 0.000 claims description 4
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 229920004482 WACKER® Polymers 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004312 hexamethylene tetramine Substances 0.000 description 2
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229960004011 methenamine Drugs 0.000 description 2
- 239000004530 micro-emulsion Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 244000198134 Agave sisalana Species 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 240000000797 Hibiscus cannabinus Species 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000011396 hydraulic cement Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 230000000243 photosynthetic effect Effects 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 238000005029 sieve analysis Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 239000002023 wood Substances 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/06—Inhibiting the setting, e.g. mortars of the deferred action type containing water in breakable containers ; Inhibiting the action of active ingredients
- C04B40/0608—Dry ready-made mixtures, e.g. mortars at which only water or a water solution has to be added before use
- C04B40/0616—Dry ready-made mixtures, e.g. mortars at which only water or a water solution has to be added before use preformed, e.g. bandages
-
- 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
- C04B28/04—Portland 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
- 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
- C04B28/18—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 mixtures of the silica-lime type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Definitions
- THIS invention relates to a method of making a finished product such as a board, from a feedstock which is a suitable particulate or fibrous material, a binder, and a thermosetting resin.
- particle board manufactured from particles of a suitable feedstock, e.g lignocellulosic particles or fibres, bound together with either a hydraulic binder or a thermosetting resin or a combination thereof.
- a suitable feedstock e.g lignocellulosic particles or fibres
- the binder comprises or includes a hydraulic binder such as Portland cement, including the time taken for the hydration of the Portland cement to proceed to completion, the possible formation of undesirable products, and the like.
- a hydraulic binder such as Portland cement
- a method of making a finished product including the steps of:
- a dry feedstock selected from the group consisting of particles or fibres of a lignocellulosic material; particles of an expanded mineral; particles of a foamed set hydraulic binder; particles of an undensified silica fume; or a mixture of two or more thereof;
- thermosetting resin in finely divided dry powder form
- Portland cement in finely divided dry powder form
- step (c) subjecting the starting material of step (b) to suitable conditions of temperature and pressure to cause the thermosetting resin to set to form a cohesive product;
- step (d) providing to the cohesive product of step (c) water in an amount sufficient for the complete hydration of the Portland cement, while simultaneously or sequentially but before the Portland cement has set, introducing carbon dioxide into the cohesive product of step (c) to assist in the setting of the Portland cement; and (e) allowing the Portland cement to set to form the finished product.
- the crux of the invention is a method of making a finished product from a feedstock, Portland cement and a thermosetting resin.
- the feedstock may be particles or fibres of a lignocellulosic material.
- a lignocellulosic material refers to any plant material emanating from the photosynthetic phenomenon.
- the particles or fibres of the lignocellulosic material are preferably finely divided.
- the fibres may be provided as unifibres or bundles of a small number of unifibres.
- the lignocellulosic material is broken down into single fibres or bundles of a small number of fibres.
- suitable finely divided lignocellulosic fibres are paper mill sludge or recycled paper waste, or the fibres used in the production of medium density or high density fibre board.
- the fibres may be sourced from agriculture such as sisal, kenaf, hemp or the like, with a length of from 5 to 12 mm inclusive, preferably from 2 to 6 mm inclusive.
- the particles When the lignocellulosic material is provided in particle form, the particles preferably have a size of from 0.1 mm to 2 mm diameter inclusive.
- An important factor in the choice of the lignocellulosic material is that it should not swell on water wetting, i.e during impregnation of the cohesive product with the water to hydrate the Portland cement.
- the feedstock may also be particles of an expanded mineral such as exfoliated vermiculite, expanded perlite, an expanded clay, an alumina, a pumice or diatomaceous earth.
- an expanded mineral such as exfoliated vermiculite, expanded perlite, an expanded clay, an alumina, a pumice or diatomaceous earth.
- the vermiculite particles preferably have a particle size of 2 mm diameter or smaller, down to a particle size of 100 micron diameter.
- the expanded perlite particles preferably have a particle size of 2 mm diameter or smaller, down to a particle size of 100 micron diameter.
- the other expanded minerals which may be used must also have a particle size of 2 mm diameter or smaller, down to a particle size of 100 micron diameter.
- the feedstock may also be particles of a foamed set hydraulic binder, e.g a foamed hydraulic cement aggregate which is then milled or ground into particles having a size of 2 mm diameter or smaller, down to a particle size of 100 micron diameter.
- a foamed set hydraulic binder e.g a foamed hydraulic cement aggregate which is then milled or ground into particles having a size of 2 mm diameter or smaller, down to a particle size of 100 micron diameter.
- the feedstock may also be particles of an undensified silica fume, having a particle size of from 5000 m 2 /kg to 20000 m 2 /kg.
- the feedstock may also be a mixture of two or more of the various feedstocks mentioned above.
- the organic percentage of the finished product should be below 7,5%.
- the thermosetting resin which is regarded as an organic material, is present in an amount of 5%, then the maximum amount of lignocellulosic material which can be present is 2,5%.
- the remainder of the feedstock may then be comprised of exfoliated vermiculite particles or expanded perlite particles or a mixture thereof.
- the preferred feedstocks are lignocellulosic particles or fibres, exfoliated vermiculite particles, expanded perlite particles, particles of undensified silica fume, or a mixture of two or more thereof.
- the feedstock is mixed firstly with a suitable amount of a thermosetting resin in finely divided dry powder form.
- thermosetting resin is preferably a novolac phenol formaldehyde resin, i.e a resin in which the molar ratio of phenol to formaldehyde exceeds parity, which is used with a suitable catalyst.
- An example of a suitable catalyst for use with a novolac phenol formaldehyde resin is hexamethylene tetramine.
- thermosetting resin must be provided in finely divided dry powder form. By finely divided there is meant that the thermosetting resin must have a particle size of 98% passing a 200 mesh screen.
- thermosetting resin is preferably used in an amount of from 1% to 20% inclusive by mass of the starting material, i.e the feedstock, the thermosetting resin and the Portland cement, more preferably in an amount of from 2% to 5% inclusive by mass of the starting material.
- the feedstock is also mixed with a suitable amount of a binder which is Portland cement.
- the Portland cement may include a pozzalan which is ground granulated blast surface slag, fly ash, or silica fume, or a mixture of two or more thereof.
- the Portland cement (and the pozzolan when present) must also be provided in finely divided dry powder form.
- finely divided there is meant that the Portland cement (and pozzolan) must have a particle size of from 300 to 1000 m 2 /kg inclusive.
- the Portland cement may be used in an amount of from 20% to 2000% inclusive of the Portland cement to 100% of the feedstock, i.e the mass ratio of the Portland cement to the feedstock is froml to 5 to 20 to 1. The preferred range is from 1 to 5 to 3 to1.
- step (c) is cohesive, i.e is held or stuck together, there is no need to press or clamp the cohesive product to hold it together during step (d).
- thermosetting resin there may also be added into the mixture of the feedstock, the thermosetting resin and the Portland cement additional components including inorganic filler materials in particle or fibre form, such as for example wollastonite, 200 mesh or finer, and synthetic fibres, or mixtures thereof.
- inorganic filler materials such as for example wollastonite, 200 mesh or finer, and synthetic fibres, or mixtures thereof.
- step (b) in which the feedstock is mixed with the thermosetting resin and the Portland cement, the starting material so produced is subjected to suitable conditions of temperature and pressure to cause the thermosetting resin to set to form a cohesive product.
- the starting material may be pressed at a temperature of up to 200°C preferably in a range of from 120° to 200°C and a pressure of from 20 to 70kg/m 2 inclusive, preferably 20 to 30kg/m 2 inclusive, for a time of up to 15 seconds/mm thickness, or usually about 8 seconds/mm thickness, to form the cohesive product.
- thermosetting resin sets to form the cohesive product, while the Portland cement remains unset.
- step (d) of the method of the invention there is provided to the cohesive product of step (c), water in an amount sufficient for the complete hydration of the Portland cement while simultaneously or sequentially introducing carbon dioxide into the cohesive product of step (c).
- a carbonation reagent selected from the group consisting of carbon dioxide; and an aqueous solution of a compound or compounds which release carbon dioxide; under conditions that cause release of carbon dioxide in the cohesive product.
- any calcium hydroxide in the Portland cement reacts with the carbon dioxide to form a carbonate plus free water. This water then can be used for the complete hydration of the Portland cement. Thus in these circumstances, it may not be necessary to add additional water.
- water may be added as such, or may form a solvent or diluent for the carbonation reagent.
- the carbonation reagent may be carbon dioxide, e.g gaseous carbon dioxide, liquid carbon dioxide, super critical or near super critical carbon dioxide, or a solution of carbon dioxide in a solvent.
- the carbonation reagent may also be a compound which releases carbon dioxide, in solution.
- the carbonation reagent may also be a combination in solution of compounds which together, under suitable conditions, release carbon dioxide
- the carbonation reagent may be a carbonate or bicarbonate, in solution, such as for example carbonic acid or sodium bicarbonate.
- the carbonation agent may be for example a potassium carbonate of formula K 2 CO 3 .2H 2 O or sodium carbonate or sal soda of formula Na 2 CO 3 .10H 2 O.
- Step (d) is carried out under conditions that cause release of carbon dioxide from the carbonation reagent in the cohesive product.
- the carbonation reagent is for example a compound which releases carbon dioxide at a particular temperature, then the cohesive product must be raised to this temperature or higher in step (d).
- sal soda releases carbon dioxide at a temperature of about 35°C, and thus, when using sal soda as the carbonation reagent, the cohesive product should be raised to a temperature of 35°C or higher in step (d).
- step (b) there may be added to the starting material in step (b) a carbonation reagent which is a dry compound or dry compounds which release carbon dioxide under specified conditions. This compound or these compounds thus form part of the cohesive product of step (c).
- a carbonation reagent which is a dry compound or dry compounds which release carbon dioxide under specified conditions. This compound or these compounds thus form part of the cohesive product of step (c).
- step (d) the cohesive product of step (c) is then subjected to the specified conditions to cause the release of carbon dioxide in the cohesive product.
- the compound may be sodium carbonate or potassium carbonate, in which case the addition of water in step (d), optionally together with the application of heat, leads to release of carbon dioxide.
- the compounds may be an acid/base couple, in which case the addition of water in step (d) leads to release of carbon dioxide.
- the introduction of carbon dioxide assists in the setting of the Portland cement. It may accelerate the setting of the Portland cement and/or may control the microstructure of the Portland cement in the finished product.
- the carbon dioxide propagates the rapid formation of hydration products such as calcium silicate hydrate and calcium carbonate, in a time span of from between 10 and 60 minutes, at ambient temperatures.
- carbon dioxide is particularly efficacious where the feedstock contains components which may interfere with the curing of the Portland cement.
- the feedstock contains a lignocellulosic material
- the water soluble extracts of the lignocellulosic material may inhibit the setting of Portland cement.
- the inclusion of carbon dioxide serves to lessen or overcome this problem.
- the preferred carbonation reagents are either gaseous carbon dioxide or super critical carbon dioxide.
- the carbonation reagent is super critical carbon dioxide, it may be forced into the cohesive product at elevated pressures of up to 100 atmospheres.
- the carbonation reagent is gaseous carbon dioxide, it may be forced into cohesive product at elevated pressures of preferably no less than 30 atmospheres.
- the cohesive product from step (c) may be placed in a pressure cylinder and subjected to a vacuum for up to 15 minutes. Thereafter, the cylinder is flooded with water which is then subjected to a positive pressure of typically 6 atmospheres for a further 15 minutes, resulting in water impregnation right through the cohesive product. The cylinder is then drained of water and the cohesive product is subjected to a post vacuum in order to extract from the cohesive product all excess water which "boils" from the cohesive product, as well as to extract any interstitial air. The excess water is drained from the cylinder and compressed carbon dioxide is introduced into the cylinder which penetrates through the cohesive product. The compressed gas feedline may be left open for a period of 30 to 60 minutes in order to allow the various reactions to go to completion. The product is then withdrawn from the cylinder and allowed to dry to provide the finished product in which the Portland cement has substantially set.
- Additional hydrophobisation of the finished product may be imposed by including in the water of hydration, a silicone micro emulsion concentrate, dispersed in water at a level of from 0,2 to 8% inclusive by mass, more generally at a level of from 1% to 3% inclusive by mass, thereby forming silicone mesophases.
- suitable silicone micro emulsions are Wacker BS1306, Wacker BS1000 and Wacker 1311.
- the above composition was mixed and then pressed at 180°C to a dry density of 1250 kg/m 3 at a thickness of 12 mm to form a cohesive product.
- This cohesive product was subsequently impregnated in a pressure cylinder with a 50% solution by mass in water of sal soda at 30°C.
- the resulting product was then humidity dried to 8% by mass of water and then warmed, in the pressure cylinder to a temperature of 60°C, to cause release of carbon dioxide.
- the product was retained in the pressure cylinder until the cure was complete.
- the carbon dioxide reacted with various cement components, particularly hydroxides of calcium which include not only calcium hydroxide but also other calcareous hydrated cement components such as calcium silicate hydrate, to give the finished product.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002258039A AU2002258039A1 (en) | 2001-05-09 | 2002-05-09 | Method of making a finished product from a feedstock, a portland cement, and a thermosetting resin |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA200103749 | 2001-05-09 | ||
ZA2001/3749 | 2001-05-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002090293A2 true WO2002090293A2 (en) | 2002-11-14 |
WO2002090293A3 WO2002090293A3 (en) | 2007-11-08 |
Family
ID=25589157
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2002/001567 WO2002090293A2 (en) | 2001-05-09 | 2002-05-09 | Method of making a finished product from a feedstock, a portland cement, and a thermosetting resin |
PCT/IB2002/001566 WO2002090292A2 (en) | 2001-05-09 | 2002-05-09 | Method of making a finished product from a feedstock, an alkaline earth metal oxide or hydroxide, and a thermosetting resin |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2002/001566 WO2002090292A2 (en) | 2001-05-09 | 2002-05-09 | Method of making a finished product from a feedstock, an alkaline earth metal oxide or hydroxide, and a thermosetting resin |
Country Status (2)
Country | Link |
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AU (1) | AU2002258039A1 (en) |
WO (2) | WO2002090293A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2437280A (en) * | 2006-04-21 | 2007-10-24 | Peter Hammond | Concrete incorporating organic liquids or solids treated with super critical carbon dioxide |
Families Citing this family (6)
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---|---|---|---|---|
KR20060115398A (en) * | 2003-10-29 | 2006-11-08 | 독사 악티에볼락 | A two-step system for improved initial and final characteristics of a biomaterial |
MX2008010830A (en) * | 2006-02-24 | 2008-11-12 | Cemex Res Group Ag | Universal hydraulic binder based on fly ash type f. |
US20080286609A1 (en) * | 2007-05-15 | 2008-11-20 | Surace Kevin J | Low embodied energy wallboards and methods of making same |
US7914914B2 (en) | 2007-06-30 | 2011-03-29 | Serious Materials, Inc. | Low embodied energy sheathing panels with optimal water vapor permeance and methods of making same |
US8337993B2 (en) | 2007-11-16 | 2012-12-25 | Serious Energy, Inc. | Low embodied energy wallboards and methods of making same |
CN102912705A (en) * | 2012-11-08 | 2013-02-06 | 沈阳建筑大学 | Road junction adopting fiber asphalt concrete to prevent pavement diseases |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US4202851A (en) * | 1976-06-18 | 1980-05-13 | Kroyer K K K | Method of preparing a sheet-formed product |
EP0585998A1 (en) * | 1992-08-10 | 1994-03-09 | ITALCEMENTI S.p.A. | Cementitious material with improved properties, and a process for its preparation |
US5358676A (en) * | 1990-05-18 | 1994-10-25 | E. Khashoggi Industries | Methods of manufacture and use for hydraulically bonded cement |
US5637412A (en) * | 1990-05-18 | 1997-06-10 | E. Khashoggi Industries | Compressed hydraulically bonded composite articles |
WO1998037032A1 (en) * | 1997-02-18 | 1998-08-27 | Windsor Technologies Limited | Method of treating a lignocellulosic material or an expanded mineral to form a finished product |
WO2001058824A1 (en) * | 2000-02-10 | 2001-08-16 | Balmoral Technologies (Proprietary) Limited | Method of preparing a cohesive product from a low density feedstock |
WO2002047900A1 (en) * | 2000-12-15 | 2002-06-20 | Balmoral Technologies (Pty) Limited | Method of making a fire resistant building panel |
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DE2165354C2 (en) * | 1971-12-29 | 1982-07-08 | Sekisui Kagaku Kogyo K.K., Osaka | Non-combustible moldings and process for their production |
JP2000015719A (en) * | 1998-07-02 | 2000-01-18 | Aica Kogyo Co Ltd | Manufacture of composite board |
-
2002
- 2002-05-09 WO PCT/IB2002/001567 patent/WO2002090293A2/en not_active Application Discontinuation
- 2002-05-09 AU AU2002258039A patent/AU2002258039A1/en not_active Abandoned
- 2002-05-09 WO PCT/IB2002/001566 patent/WO2002090292A2/en not_active Application Discontinuation
Patent Citations (7)
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US4202851A (en) * | 1976-06-18 | 1980-05-13 | Kroyer K K K | Method of preparing a sheet-formed product |
US5358676A (en) * | 1990-05-18 | 1994-10-25 | E. Khashoggi Industries | Methods of manufacture and use for hydraulically bonded cement |
US5637412A (en) * | 1990-05-18 | 1997-06-10 | E. Khashoggi Industries | Compressed hydraulically bonded composite articles |
EP0585998A1 (en) * | 1992-08-10 | 1994-03-09 | ITALCEMENTI S.p.A. | Cementitious material with improved properties, and a process for its preparation |
WO1998037032A1 (en) * | 1997-02-18 | 1998-08-27 | Windsor Technologies Limited | Method of treating a lignocellulosic material or an expanded mineral to form a finished product |
WO2001058824A1 (en) * | 2000-02-10 | 2001-08-16 | Balmoral Technologies (Proprietary) Limited | Method of preparing a cohesive product from a low density feedstock |
WO2002047900A1 (en) * | 2000-12-15 | 2002-06-20 | Balmoral Technologies (Pty) Limited | Method of making a fire resistant building panel |
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GB2437280A (en) * | 2006-04-21 | 2007-10-24 | Peter Hammond | Concrete incorporating organic liquids or solids treated with super critical carbon dioxide |
Also Published As
Publication number | Publication date |
---|---|
AU2002258039A8 (en) | 2008-01-10 |
WO2002090292A3 (en) | 2003-01-03 |
AU2002258039A1 (en) | 2002-11-18 |
WO2002090293A3 (en) | 2007-11-08 |
WO2002090292A2 (en) | 2002-11-14 |
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