EP3448827A1 - Method of preparing the construction material with the addition of a mixture of mineral dusts and post-industrial dusts - Google Patents
Method of preparing the construction material with the addition of a mixture of mineral dusts and post-industrial dustsInfo
- Publication number
- EP3448827A1 EP3448827A1 EP16723010.1A EP16723010A EP3448827A1 EP 3448827 A1 EP3448827 A1 EP 3448827A1 EP 16723010 A EP16723010 A EP 16723010A EP 3448827 A1 EP3448827 A1 EP 3448827A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- post
- dusts
- parts
- industrial
- mould
- 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.)
- Withdrawn
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
- 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- 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
- the present invention relates to the method of preparing the construction material with the addition of mineral dusts and post-industrial dusts.
- EP2660288 discloses a process for producing panels of printed circuit boards of electronic systems ground into dust with the addition of, among the others, montmorillonite, as an anti-flammable supplement.
- British Patent Application GB2067174 discloses, among others, inorganic rigid foam with a cellular structure, comprising montmorillonite, and its use as construction material and refractory material.
- Russian Patent RU No. 2173674 discloses a process for the preparation of swollen silicates, which consists of mixing water glass, crushed foam silicate, mineral filler, oleic acid and a saturated aqueous solution of sugar and water. The mixture undergoes granulation and, after initial drying-up of the granules, is sintered in moulds.
- the main disadvantages of the above-described processes comprise the use of scarce and expensive substrates or alimentary raw materials, which adversely affects the cost of manufacturing the final product. Furthermore, due to the used raw materials, the obtained materials will have low mechanical resistance, and in contact with high temperature (e.g. during thermal treatment at the stage of production or as a result of fire in a building in which such materials were used), harmful gases will be released into the environment.
- the object of the invention is to provide a process for preparing a construction material with improved compressive resistance at a low cost of manufacture.
- the object of the invention is also to eliminate the problem of emitting the harmful gases while contacting the construction material with high temperature both at the stage of producing the material, and in case of fire in object, in which such construction materials were used.
- the present invention relates to a method for preparing the construction material wherein an aqueous solution of vitreous sodium silicates, amorphous silica, post-industrial wastes and mineral wastes are mixed to produce a dense sol, which is dried, crushed and annealed, characterised in that 27-16 parts of amorphous silica and 31 -8 parts of a mixture of post- industrial dusts and mineral dusts are added to 68-47 parts of sodium water glass with a modulus M of 2.5-3.5 and a density of 1 .35-1 .45 g/cm 3 , wherein the mass ratio of post-industrial dusts to mineral dusts is from 1 :3 to 3:4 and, optionally, is added to 6 parts of water, then the ingredients are mixed to produce a homogenous dense sol, then the sol is subjected to drying at temperature of 75-90°C for a period of approximately 2 hours until gelation of the sol, and then the dried gel is subjected to mechanical crushing into pieces having the size of beans,
- boric acid H3BO3 in an amount from 1 to 5 g of the acid per 100 g of dust mixture is applied.
- the addition of boric acid ensures homogeneity of foaming, and thus a uniform distribution and pore size throughout the entire volume of the produced material block.
- mineral dusts used in the process of the invention are selected from a group consisting of:
- material B which is a dusty micro- and nanomaterial, containing montmorillonite, also known as bentonite, Al2[(OH)2Si 4 Oio] » nH2O, or hydrated aluminum hydrosilicate, which contains metals in the form of oxides of the following oxide percentage composition: S1O2 67%, AI2O3 19.5%, Fe 2 O 3 2.5%, MgO 3.5%, CaO 2.2% , Na 2 O 0.4%, P2O5 0.1 % , TiO 2 0.2% , K 2 O 0.5% and
- material D which is diatomaceous earth with average oxide levels of:
- a mixture of post-industrial dusts having a particle size from 25 ⁇ to approximately 25 nm is used.
- post-industrial dusts used in the process of the invention are selected from a group consisting of material S, which is an post-industrial waste in a dusty form, preferably micro-granular silica dust comprising: min. 85-90% of S1O2, 0.5-2.5% of Fe 2 O 3 , 0.1 -1 % of CaO, 0.1-1.5% of AI2O3, such as dust containing 90% of S1O2 and having a specific surface area of 15-35 m 2 /g and a bulk density of 350 kg/m 3 or another dust having a bulk density of 450-650 kg/m 3 , as well as sludge - a 50:50 suspension of dust in water, wherein 1 m 3 of the sludge contains 700 kg of dust;
- material K which is an post-industrial waste in the form of a by-product of combustion of an organic material, preferably coal, preferably lignite, wherein the content of oxides in the combustion by-product is: S1O2 76- 20%; CaO 45-0.2%; K 2 O 8-0.01 %; SO 3 15-0.01 %; P2O5 10-0.01 %; MgO 15-0.01 %; Fe 2 O 3 27-0.01 %; AI2O3 40-5%; Na 2 O 8-0.01 %; TiO 2 8-0.01 %, respectively.
- the process for preparing a construction material of the invention allows using of waste materials, which are environmentally burdensome, solving the problem of post-industrial dust disposal.
- the partial replacement of an expensive raw material which is an amorphous silica - material A - with a mixture of post-industrial dust (K, S) and mineral dust (B, D), also allows for the reduction of the annealing temperature, which contributes to decreasing the manufacturing cost of the construction material produced using the process of the invention. Furthermore, as shown in the
- the construction material produced by the process of the invention has improved compressive strength properties, mainly thanks to the use of appropriate mass ratios of post-industrial dusts to mineral dusts, which equal from 1 :3 to 3:4.
- the present invention also relates to the use of the construction material produced by the process of the invention in civil engineering, especially as a construction material in buildings, where a high compressive strength of a construction material is required, for example in tower blocks.
- the construction material obtained by the process of the invention has a high fire resistance in the range of 835-900°C, and in case of the contact with a high temperature (e.g. as a result of a fire in a building in which the material of the invention was used for the construction), it melts without releasing harmful gases into the environment. Because of these specific properties, the construction material produced in process of the invention can be used in public utility buildings, such as sports facilities, hospitals, schools, kindergartens or other facilities, where many people gather at the same time.
- Example 7 [0033] 850 g (17 parts) of amorphous silica - material A, and 900 g (18 parts) of diatomaceous earth - material D, were sequentially added to 2400 ml (65 parts) of sodium water glass with continuous mechanical stirring. The raw materials were mixed to obtain a homogenous, dense mixture, which was dried at 90°C for 2 hours. After this time, a hard gel was obtained, which was mechanically crushed into pieces having the size of beans. A mould was then filled with the crushed gel, and the mould was closed and placed in an oven, in which the temperature was increased at a rate of 10 min until a final temperature of 400°C was obtained.
- the raw materials were mixed to obtain a homogenous, dense mixture, which was dried at 85°C for 2 hours. After this time, a hard gel was obtained, which was mechanically crushed into pieces having the size of beans.
- a mould was then filled with the crushed gel, and the mould was closed and placed in an oven, in which the temperature was increased at a rate of 10 min until a final temperature of 425°C was obtained.
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)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL417060A PL417060A1 (en) | 2016-04-29 | 2016-04-29 | Method for obtaining structural material with addition of a mixture of mineral dusts and industrial dusts |
PCT/PL2016/050017 WO2017188830A1 (en) | 2016-04-29 | 2016-05-13 | Method of preparing the construction material with the addition of a mixture of mineral dusts and post-industrial dusts |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3448827A1 true EP3448827A1 (en) | 2019-03-06 |
Family
ID=56292869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16723010.1A Withdrawn EP3448827A1 (en) | 2016-04-29 | 2016-05-13 | Method of preparing the construction material with the addition of a mixture of mineral dusts and post-industrial dusts |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3448827A1 (en) |
PL (1) | PL417060A1 (en) |
WO (1) | WO2017188830A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109897340A (en) * | 2019-01-25 | 2019-06-18 | 山东源根化学技术研发有限公司 | A kind of building board of acid and alkali-resistance and preparation method thereof |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2067174B (en) | 1980-01-10 | 1984-05-31 | Ici Ltd | Inorganic foam material |
JPS56109863A (en) * | 1980-01-29 | 1981-08-31 | Takashi Ishikawa | Inorganic lightweight panel |
PL388764A1 (en) * | 2009-08-10 | 2011-02-14 | Instytut Niskich Temperatur I Badań Strukturalnych Pan Im. Włodzimierza Trzebiatowskiego | Method for manufacturing thermal insulation materials with the use of mineral dust and post-industrial waste materials in the form of powder |
US20130274382A1 (en) | 2010-12-30 | 2013-10-17 | Chaofeng Xiao | Plate synthesized by waste circuit board powder and manufacturing process thereof |
CN104386953A (en) | 2014-09-29 | 2015-03-04 | 王洪生 | Fireproof thermal-insulation mortar and application method thereof |
-
2016
- 2016-04-29 PL PL417060A patent/PL417060A1/en unknown
- 2016-05-13 WO PCT/PL2016/050017 patent/WO2017188830A1/en active Application Filing
- 2016-05-13 EP EP16723010.1A patent/EP3448827A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
PL417060A1 (en) | 2017-11-06 |
WO2017188830A1 (en) | 2017-11-02 |
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