SI25437A2 - Additional component in cement and concrete - Google Patents
Additional component in cement and concrete Download PDFInfo
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- SI25437A2 SI25437A2 SI201800171A SI201800171A SI25437A2 SI 25437 A2 SI25437 A2 SI 25437A2 SI 201800171 A SI201800171 A SI 201800171A SI 201800171 A SI201800171 A SI 201800171A SI 25437 A2 SI25437 A2 SI 25437A2
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- Prior art keywords
- cement
- concrete
- fly ash
- liquefied
- additional material
- Prior art date
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- 239000004568 cement Substances 0.000 title claims abstract description 22
- 239000004567 concrete Substances 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000010881 fly ash Substances 0.000 claims abstract description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003513 alkali Substances 0.000 claims abstract description 8
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 7
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004202 carbamide Substances 0.000 claims abstract description 6
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 4
- 239000004615 ingredient Substances 0.000 claims abstract description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910052681 coesite Inorganic materials 0.000 claims abstract 2
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract 2
- 229910052682 stishovite Inorganic materials 0.000 claims abstract 2
- 229910052905 tridymite Inorganic materials 0.000 claims abstract 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- -1 Portland clinker Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000006838 adverse reaction Effects 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
- 238000000137 annealing Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
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- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
- C04B18/087—Flue dust, i.e. fly ash from liquid fuels, e.g. oil
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/061—Ashes from fluidised bed furnaces
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/60—Methods for eliminating alkali metals or compounds thereof, e.g. from the raw materials or during the burning process; methods for eliminating other harmful components
-
- 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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00215—Mortar or concrete mixtures defined by their oxide composition
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Toxicology (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Ta rešitev razkriva uporabo dodatnega materiala, narejenega iz utekočinjenega elektrofiltrskega pepela, ki obsega od 6 mas. % do 26 mas. % CaO in od 26 mas. % do 46 mas. % SiO2, preostanek obsega ostale delne sestavine, označena s tem, da se utekočinjeni elektrofiltrski pepel poškropi z raztopino amonijaka in/ali sečnine in dobljena vsebnost alkalij, kot sta Na2O in/ali K2O je v območju od 0,2 do 0,5 %, kot komponente v cementu ali betonu.This solution discloses the use of an additional material made from liquefied fly ash, comprising from 6 wt. % to 26% by weight % CaO and from 26 wt. % to 46 wt. % SiO2, the remainder of the remaining partial ingredients, characterized in that the liquefied fly ash is sprayed with a solution of ammonia and / or urea and the resulting alkali content, such as Na2O and / or K2O, ranges from 0.2 to 0.5% , as a component in cement or concrete.
Description
Dodatni material za cement in betonAdditional material for cement and concrete
Področje izumaFIELD OF THE INVENTION
Ta tehnična rešitev se nanaša na dodatni material za cement in beton, ki se lahko uporablja tudi za izdelavo klinkerja in različnih drugih gradbenih zmesi.This technical solution relates to an additional material for cement and concrete, which can also be used to make clinker and various other construction mixtures.
Stanje tehnikeState of the art
Danes se zaradi prihranka pri surovinah cementu in betonu običajno dodajajo dodatni materiali, kot so granulirana plavžna žlindra, naravni pucolan, naravni kalciniran pucolan, kremeničast elektrofiltrski pepel, kalcijev pepel, portlandski klinker, kalcijev sulfat, kalciniran skrilavec, apnenec, kremeničasta dimnina ali anorganske komponente, ki so stranski produkti proizvodnje klinkerja.Today, additional materials such as granular blast furnace slag, natural pozzolan, natural calcined pozzolan, silica fly ash, calcium ash, Portland clinker, calcium sulphate, calcined slate or limestone are usually added to save cement and concrete raw materials. , which are by-products of clinker production.
Pridobivanje teh materialov je zelo težavno, saj mora vsak material izpolnjevati določene parametre. Njihova proizvodnja je energijsko potratna, ker jih je treba mleti in dalje obdelati ali ekstrahirati. Zato uporaba teh materialov ni stroškovno učinkovita kljub dejstvu, da delno nadomeščajo portlandski klinker.Obtaining these materials is very difficult, as each material must meet certain parameters. Their production is energy consuming because they need to be ground and further processed or extracted. Therefore, the use of these materials is not cost-effective despite the fact that they partially replace Portland clinker.
Poleg tega, da imajo relativno visoko ceno in nizko razpoložljivost, je druga slabost materialov, kot je kremeničasti elektrofiltrski pepel, v tem, da je po denitrifikaciji kremeničasti elektrofiltrski pepel kontaminiran z NH3, kar še dodatno omejuje njegovo uporabo v cementu in betonu.In addition to having a relatively high cost and low availability, another disadvantage of materials such as silica fly ash is that, after denitrification, silica fly ash is contaminated with NH3, further limiting its use in cement and concrete.
Povzetek tehnične rešitveSummary of the technical solution
Te slabosti v veliki meri odpravi dodatni material za cement in beton po tej tehnični rešitvi, ki je narejen iz utekočinjenega elektrofiltrskega pepela, ki obsega od 6 mas. % do 26 mas. % CaO in od 26 mas. % do 46 mas. % SiO2, preostalo so njegove ostale običajne delne sestavine, pri čemer se utekočinjeni elektrofiltrski pepel poškropi z raztopino amonijaka in/ali sečnine. Končna vsebnost alkalij, kot sta Na2O in K2O, je v območju od 0,2 mas. % do 0,5 mas. %.These disadvantages are largely eliminated by additional material for cement and concrete according to this technical solution, which is made of liquefied fly ash, comprising from 6 wt. % to 26 wt. % CaO and from 26 wt. % to 46 wt. % SiO 2 , the remainder remaining its usual conventional constituents, the liquefied fly ash sprayed with a solution of ammonia and / or urea. The final content of alkalis, such as Na 2 O and K 2 O, is in the range of 0.2 wt. % to 0.5 wt. %.
V strokovnih objavah in tehničnih standardih sta kalcijev oksid (CaO) in silicijev dioksid (SiO2) pogosto navedena kot aktivna oksida, ker na primer CaO reagira s sečnino in/ali amonijakom v utekočinjenem pepelu in ga nevtralizirata v procesu, v katerem se odstranijo neželene sestavine iz dodatnega materiala za cement in beton po tej tehnični rešitvi in takoIn professional publications and technical standards, calcium oxide (CaO) and silicon dioxide (SiO 2 ) are often referred to as active oxides because, for example, CaO reacts with urea and / or ammonia in liquefied ash and neutralizes it in a process to remove unwanted components from additional material for cement and concrete according to this technical solution and so on
-2dobimo nizko vsebnost alkalij. Po tem vidiku sta pomembni samo opredeljeni spodnji meji vsebnosti CaO in SiC>2, saj pri nižjih vsebnostih ne bi bilo mogoče doseči takšne nizke vsebnosti alkalij, ki so zahtevane za dodatni material za cement in beton za povečanje njegove trdnosti. Zato se lahko dodatni material za cement in beton po tej tehnični rešitvi uporablja tudi pri proizvodnji nizko alkalijskih cementov ali nizko alkalijskih betonov. Je tudi brez vonja, ne proizvaja nikakršnih negativnih reakcij ob reagiranju z vodo, količina amonijaka in/ali sečnine, napršene na utekočinjeni elektrofiltrski pepel, pa temelji na zahtevi, da ne preseže omejitev emisij NO2.-2we get a low alkali content. From this point of view, only the defined lower limits of CaO and SiC content> 2 are important, as at lower contents it would not be possible to achieve such low alkali content required for additional cement and concrete material to increase its strength. Therefore, according to this technical solution, additional material for cement and concrete can also be used in the production of low-alkaline cements or low-alkaline concretes. It is also odorless, does not produce any adverse reactions when reacted with water, and the amount of ammonia and / or urea sprayed on the liquefied fly ash is based on a requirement not to exceed the NO 2 emission limits.
Druge običajne sestavine utekočinjenega elektrofiltrskega pepela v svojih običajnih vsebnostih, namreč drugi oksidi, kot so aluminijev oksid, železov oksid in podobno, niso pomembne v smislu nizke vsebnosti alkalij v dodatnem materialu za cement in beton po tej tehnični rešitvi. Poleg tega lahko ta dodatna sestavina vsebuje tudi na primer od 0,002 mas. % do 0,060 mas. % kloridov in od 2 mas. % do 6 mas. % žvepla.Other common constituents of liquefied fly ash in their usual contents, namely other oxides such as alumina, iron oxide and the like, are not relevant in terms of low alkali content in the cement and concrete admixture material according to this technical solution. In addition, this additional ingredient may also contain, for example, from 0.002 wt. % to 0.060 wt. % of chlorides and from 2 wt. % to 6 wt. % sulfur.
Poleg doseganja tako nizke vsebnosti alkalij v dodatnem materialu za cement in beton po tej tehnični rešitvi so druge prednosti nizki proizvodni stroški in skladnost z veljavnimi standardi.In addition to achieving such a low alkali content in the additional material for cement and concrete according to this technical solution, other advantages are low production costs and compliance with applicable standards.
Poleg tega ima dodatni material za cement in beton po tej tehnični rešitvi drobnost, volumsko gostoto v območju od 0,70 do 1,20 mg/m3, velikost zrn v območju od 0,63 do 0,125 mm in vsebnost finih delcev v območju od 60 do 99,9 mas. %, pri čemer je nasipna gostota od 0,5 do 0,7 mg/m3 in žarilna izguba je od 2 do 5 mas. %.In addition, the additional material for cement and concrete according to this technical solution has a fineness, a volume density in the range from 0.70 to 1.20 mg / m 3 , a grain size in the range from 0.63 to 0.125 mm and a fine particle content in the range from 60 to 99.9 wt. %, where the bulk density is from 0.5 to 0.7 mg / m 3 and the loss of annealing is from 2 to 5 wt. %.
Prednost dodatnega materiala za cement in beton po tej tehnični rešitvi je, da ne vsebuje nikakršnih organskih onesnažil, vsebnost naravnih radionuklidov izpolnjuje zahteve za stanovanjske površine in se dobro ujema z drugimi betonskimi primesmi, aditivi za mehčanje in podobno.The advantage of additional material for cement and concrete according to this technical solution is that it does not contain any organic pollutants, the content of natural radionuclides meets the requirements for residential areas and matches well with other concrete admixtures, softening additives and the like.
Izvedbeni primer tehnične rešitveImplementation example of a technical solution
Dodatni material za cement in beton v tem izvedbenem primeru je narejen iz utekočinjenega elektrofiltrskega pepela, ki nastane pri procesu gorenja uprašenega premoga pri temperaturi okoli 850 °C in vsebuje, v mas. %, 10 % kalcijevega oksida (CaO) in 30 % silicijevega dioksida (SiO2), preostanek obsega druge običajne delne sestavine. Utekočinjeni elektrofiltrski pepel se poprši s sečnino, dobljena vsebnost alkalij Na2O je 0,3 mas. % in alkalij K2O je 0,4 mas. %.The additional material for cement and concrete in this embodiment is made of liquefied fly ash, which is formed during the combustion process of powdered coal at a temperature of about 850 ° C and contains, in wt. %, 10% calcium oxide (CaO) and 30% silicon dioxide (SiO 2 ), the remainder comprising other common partial constituents. The liquefied fly ash is sprayed with urea, the resulting alkali Na 2 O content is 0.3 wt. % and alkali K 2 O is 0.4 wt. %.
-3Pri ocenjevalnih testih smo ta dodatni material primešali cementu v količini 15 mas. % glede na maso cementa CEM I 52.5 R s specifično površino 4100 cm2g'1. Dobljeni cement se je spremenil v brozgo z W=0,5, ki se je pričela strjevati po 220 minutah. Malto, pripravljeno iz tega cementa, kjer je bilo razmerje cementa proti pesku 1 : 3 (običajen pesek z enakomerno zmavostjo), smo oblikovali v bloke 4x4x16 cm, jih skladiščili 24 ur v okolju z nasičeno vodno paro in jih potem pustili v vodi pri 20 °C 28 dni. Po 48 urah so imeli bloki tlačno trdnost 38,7 MPa in upogibno trdnost 6,4 MPa. Po 7 dneh je tlačna trdnost dosegla 52 MPa, upogibna trdnost pa 8,4 MPa, po 28 dneh pa je tlačna trdnost dosegla 60,8 MPa in upogibna trdnost 8,8 MPa.-3During evaluation tests, this additional material was mixed with cement in the amount of 15 wt. % by weight of CEM I 52.5 R cement with a specific surface area of 4100 cm 2 g ' 1 . The resulting cement turned into a slurry with W = 0.5, which began to solidify after 220 minutes. Mortar prepared from this cement, where the ratio of cement to sand was 1: 3 (ordinary sand with uniform strength), was formed into blocks of 4x4x16 cm, stored for 24 hours in an environment with saturated water vapor and then left in water at 20 ° C 28 days. After 48 hours, the blocks had a compressive strength of 38.7 MPa and a flexural strength of 6.4 MPa. After 7 days, the compressive strength reached 52 MPa and the flexural strength 8.4 MPa, and after 28 days the compressive strength reached 60.8 MPa and the flexural strength 8.8 MPa.
Claims (2)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CZ2017-33994U CZ31037U1 (en) | 2017-08-04 | 2017-08-04 | An additional component in cement and concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SI25437A2 true SI25437A2 (en) | 2018-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SI201800171A SI25437A2 (en) | 2017-08-04 | 2018-08-03 | Additional component in cement and concrete |
Country Status (6)
| Country | Link |
|---|---|
| CZ (1) | CZ31037U1 (en) |
| DE (1) | DE202018104483U1 (en) |
| HU (1) | HUP1800277A2 (en) |
| PL (1) | PL426573A1 (en) |
| SI (1) | SI25437A2 (en) |
| SK (1) | SK8473Y1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001106557A (en) * | 1999-10-07 | 2001-04-17 | Taiheiyo Cement Corp | Storing method of aggregative dust |
| PL220265B1 (en) * | 2011-03-29 | 2015-09-30 | Akademia Górniczo Hutnicza Im Stanisława Staszica W Krakowie | Mineral additive for the concrete moulds with RPC reactive powder and other cement-based highly resistant composites |
| CN104310946B (en) * | 2014-10-16 | 2016-02-24 | 傅宇晓 | A kind of coal ash heat-preservation material and preparation method thereof |
| RU2630021C1 (en) * | 2016-06-07 | 2017-09-05 | Федеральное государственное бюджетное учреждение науки "Институт химии твердого тела Уральского Отделения Российской Академии наук" | Method for processing fly ash of thermal power stations |
| KR20180002972A (en) * | 2016-06-29 | 2018-01-09 | 단국대학교 산학협력단 | Low-heat concrete composition including urea |
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2017
- 2017-08-04 CZ CZ2017-33994U patent/CZ31037U1/en active Protection Beyond IP Right Term
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2018
- 2018-08-03 HU HUP1800277 patent/HUP1800277A2/en unknown
- 2018-08-03 DE DE202018104483.4U patent/DE202018104483U1/en active Active
- 2018-08-03 SI SI201800171A patent/SI25437A2/en active IP Right Grant
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- 2018-08-06 PL PL426573A patent/PL426573A1/en unknown
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|---|---|
| SK500732018U1 (en) | 2019-01-08 |
| SK8473Y1 (en) | 2019-06-04 |
| PL426573A1 (en) | 2019-02-11 |
| DE202018104483U1 (en) | 2018-08-13 |
| CZ31037U1 (en) | 2017-09-19 |
| HUP1800277A2 (en) | 2019-02-28 |
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