AT1603U1 - USE OF ADDITIVE FLIGHT BAGS AS FILLING MATERIAL TO IMPROVE THE SOIL - Google Patents
USE OF ADDITIVE FLIGHT BAGS AS FILLING MATERIAL TO IMPROVE THE SOIL Download PDFInfo
- Publication number
- AT1603U1 AT1603U1 AT0803297U AT803297U AT1603U1 AT 1603 U1 AT1603 U1 AT 1603U1 AT 0803297 U AT0803297 U AT 0803297U AT 803297 U AT803297 U AT 803297U AT 1603 U1 AT1603 U1 AT 1603U1
- Authority
- AT
- Austria
- Prior art keywords
- soil
- additives
- backfill
- additive
- improve
- Prior art date
Links
- 239000002689 soil Substances 0.000 title claims abstract description 19
- 239000000654 additive Substances 0.000 title claims abstract description 17
- 230000000996 additive effect Effects 0.000 title abstract description 5
- 239000000463 material Substances 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 5
- 239000004568 cement Substances 0.000 claims description 11
- 239000010440 gypsum Substances 0.000 claims description 4
- 229910052602 gypsum Inorganic materials 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 2
- 239000002893 slag Substances 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 240000006909 Tilia x europaea Species 0.000 claims 1
- 235000013312 flour Nutrition 0.000 claims 1
- 239000010881 fly ash Substances 0.000 abstract description 5
- 239000000047 product Substances 0.000 description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 10
- 235000012255 calcium oxide Nutrition 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 5
- 239000004566 building material Substances 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000004572 hydraulic lime Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229940043430 calcium compound Drugs 0.000 description 1
- 150000001674 calcium compounds Chemical class 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 239000002984 plastic foam Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- 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
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Vorgeschlagen wird die Verwendung von Additivflugaschen, insbesondere solchen mit Blaine-Werten von mindestens 1500 cm2 /g, mindestens 5 Gew.-% gebundenem und mindestens 2 Gew.-% freiem CaO, gegebenenfalls zusammen mit Zumahlstoffen, Zusätzen und/oder Zuschlägen, als Verfüllgut zur Bodenverbesserung, mit dem Kennzeichen, daß in Abhängigkeit vom Feuchtigkeitsgehalt des Bodens und der gewünschten Verbesserung im Verfüllbereich ein Wasser/Feststoffverhältnis bis hinauf zu 2,5 eingestellt wird.It is proposed to use additive fly ash, in particular those with Blaine values of at least 1500 cm2 / g, at least 5% by weight bound and at least 2% by weight free CaO, optionally together with additives, additives and / or additives, as backfill for soil improvement, with the characteristic that a water / solids ratio of up to 2.5 is set depending on the moisture content of the soil and the desired improvement in the backfill area.
Description
<Desc/Clms Page number 1>
Die Erfindung betrifft die Verwendung von Additivflugaschen, insbesondere solchen mit Blaine-Werten von mindestens 1500 cm2/g, mindestens 5 Gew.-% gebundenem und mindestens 2 Gew.-% freiem CaO, gegebenenfalls zusammen mit Zumahistoffen, Zusätzen und/oder Zuschlägen, als Verfüllgut zur Bodenverbesserung.
Additivflugaschen oder REA-Produkte sind grosstechnische Abfallprodukte kalorischer Kraftwerke, bei denen zur Rauchgasentschwefelung im Sprühabsorptionsverfahren Kalziumverbindungen, vor allem Kalksteinmehl, verwendet werden. Durch die Umsetzung mit den Rauchgasen enthalten diese Aschen Reaktionsprodukte von CaO und freies CaO.
Eine typische Zusammensetzung eines derartigen REA (Rauchgasentschwefelungsanlage)-Produkts ist
EMI1.1
<tb>
<tb> Gew.-%
<tb> Flugasche <SEP> 20
<tb> Ca-sulfithalbhydrat <SEP> 65
<tb> Ca-sulfathalbhydrat <SEP> 5
<tb> Ca-carbonat <SEP> 5
<tb> CaO <SEP> 5
<tb>
und aufgrund der hohen Anfallmengen und des hydraulischen Abbindeverhaltens wurden folgende technischen Verwendungen vorgeschlagen : a) Zuschlag in Betonbaustoffen in Mengen von 5-10 Gew.-%, b) Baustoff im Tiefbau (als Dichtstoffe zusammen mit Inertfüllern, z. B. Steinmehl), c) Dichtschichten für Deponien, d) als abbinderegelnder Zementzusatz im Austausch für Gips und Anhydrit, sowie e) zum thermischen Recycling unter Erhalt von Schwefelsäure und Zementklinker.
Am Tiefbaugebiet ist dabei bekanntgeworden, REA-Produkte zur Erzielung einer temporären Bodenabdichtung einzusetzen, wobei keine oder keine nennenswerte
<Desc/Clms Page number 2>
Bodenverfestigung angestrebt wird, dafür aber eine automatische Rückbildung der ursprünglichen Bodenporosität. Dies ist insbesondere interessant für temporäre Baugrundabdichtungen gegen anstehendes Grundwasser oder Wasserbaustellen ohne Wasserhaltung. Hiezu wurde vorgeschlagen, REA-Produkte als Bindemittel zu verwenden und in der Bodenverfüllmasse ein Wasser/Feststoffverhältnis im Bereich von 0, 5 bis 2, 5 einzustellen. Dies mit dem Ziel, durch höheren Wasseranteil die Abdichtungsdauer herabzusetzen und umgekehrt.
Anderseits ist im Tiefbau zur Herstellung von hydraulischen gebundenen Tragschichten, stabilisierten frostbeständigen Bodenschichten und zur Bodenverfestigung auch die Verwendung von REA-Produkten zusammen mit Zement als Bindemittel vorgeschlagen worden-und zwar ausgehend von einem Stand der Technik, nach dem Bodenverfestigung mit Zement - die nur dann funktioniert, wenn der Boden nicht zu feucht ist-mit Kalk, mit REA-Produkten sowie mit REA-Produkten zusammen mit Kalk bereits vorgeschlagen worden war.
Dabei kann der zwingend vorgesehene Zementanteil bis zu 70 Gew.-%, bezogen auf das REA-Produkt ausmachen und es können auch natürliche oder künstliche Puzzolane sowie andere latent hydraulische oder hydraulische Stoffe mitverwendet werden.
Gegenstand der vorliegenden Erfindung ist hingegen, ausgehend von der bekannten Verwendung von REA-Produkten zur Bodenverfüllung die Situation am Verfüllort so abzustimmen, dass der jeweils gewünschte Verfüllzweck erreicht werden kann. Dies erfolgt erfindungsgemäss durch Einstellung des Wasser/Feststoffverhälnisses im Verfüllbereich - somit durch Abstimmen des Wasser/Feststoffverhältnisses in der Verfüllmasse auf das vor Ort vorliegende in Abhängigkeit von der durchzuführenden Bodenverbesserung.
Dabei ist selbstverständlich eine Mitverwendung von Zement nicht
EMI2.1
<Desc/Clms Page number 3>
Erfindungsgemäss ist vorgesehen, dass in Abhängigkeit vom Feuchtigkeitsgehalt des
EMI3.1
Es können je nach Bedarf alle auf dem Bau- und Zementsektor üblichen Hilfsstoffe zur Anwendung kommen, d. h. auf der einen Seite Zuschläge wie frische oder rezyklierte Baumaterialien, z. B. zerkleinerter Bauschutt, Erdreich, Sand, Kies, Splitt, geblähter Ton, Schiefer oder Perlit, Kunststoffschaumteilchen, natürliche oder synthetische, anorganische oder organische Fasern od. dgl., Zemente, natürliche oder künstliche Puzzolane, wie z. B. herkömmliche Flugaschen oder Trasse, latent hydraulische Stoffe, wie z.B.
Hochofenschlacken, Branntkalke, Weisskalkhydrat, hydraulische Kalke, hochhydraulische Kalke, Kalziumsulfat, Gipse, gebrannte Gipse und/oder Anhydrite, Alkaliverbindungen, insbesondere Karbonate, Bikarbonate, Hydroxyde, Sulfate, Silikate, Aluminate und/oder alkalihältige Abfallprodukte, insbesondere Zementofenflugstaub, erhärtungsverbessernde Zusätze, wie Caca2, oder auf der anderen Seite Verflüssiger sowie hydrophobierende Mittel oder Treibmittel oder andere Schaumbildner, sowie Tenside - diese Zusätze werden wie üblich auf die Situation abgestimmt und grossteils dann verwendet, wenn bleibende Festigkeit gefordert ist.
Die Abstimmung erfolgt anhand vor Ort gezogener Bodenproben, da im Tiefbau nicht nur die unterschiedlichsten Bodenverhältnisse, sondern auch die unterschiedlichsten Vorschriften zu berücksichtigen sind.
<Desc / Clms Page number 1>
The invention relates to the use of additive fly ash, in particular those with Blaine values of at least 1500 cm2 / g, at least 5% by weight bound and at least 2% by weight free CaO, optionally together with additives, additives and / or additives, as Backfill for soil improvement.
Additive fly ash or REA products are large-scale waste products from caloric power plants, in which calcium compounds, especially limestone powder, are used for flue gas desulfurization in the spray absorption process. As a result of the reaction with the flue gases, these ashes contain reaction products of CaO and free CaO.
A typical composition of such a REA (flue gas desulfurization plant) product is
EMI1.1
<tb>
<tb>% by weight
<tb> fly ash <SEP> 20
<tb> Ca sulfite hemihydrate <SEP> 65
<tb> Ca sulfate hemihydrate <SEP> 5
<tb> Ca carbonate <SEP> 5
<tb> CaO <SEP> 5
<tb>
and due to the high volume of deposits and the hydraulic setting behavior, the following technical uses were proposed: a) addition in concrete building materials in amounts of 5-10% by weight, b) building material in civil engineering (as sealants together with inert fillers, e.g. stone powder), c) sealing layers for landfills, d) as a setting-regulating cement additive in exchange for gypsum and anhydrite, and e) for thermal recycling while maintaining sulfuric acid and cement clinker.
In the civil engineering area, it has become known to use REA products to achieve temporary soil sealing, with no or no significant ones
<Desc / Clms Page number 2>
Soil consolidation is sought, but an automatic regression of the original soil porosity. This is particularly interesting for temporary waterproofing of ground against incoming groundwater or hydraulic construction sites without water drainage. For this purpose, it has been proposed to use REA products as binders and to set a water / solids ratio in the range from 0.5 to 2.5 in the soil filling compound. The goal is to reduce the sealing time by increasing the water content and vice versa.
On the other hand, in civil engineering for the production of hydraulically bound base layers, stabilized frost-resistant soil layers and for soil consolidation, the use of REA products together with cement as a binder has also been proposed - based on a state of the art, after soil consolidation with cement - only then works if the floor is not too wet - with lime, with REA products as well as with REA products together with lime had already been suggested.
The mandatory proportion of cement can make up to 70% by weight, based on the REA product, and natural or artificial pozzolans and other latent hydraulic or hydraulic substances can also be used.
The present invention, on the other hand, is based on the known use of REA products for soil backfilling to coordinate the situation at the backfill location so that the desired backfill purpose can be achieved. According to the invention, this is done by adjusting the water / solids ratio in the backfill area - thus by matching the water / solids ratio in the backfill mass to the one present on site depending on the soil improvement to be carried out.
It goes without saying that cement should not be used
EMI2.1
<Desc / Clms Page number 3>
According to the invention it is provided that, depending on the moisture content of the
EMI3.1
Depending on requirements, all auxiliaries customary in the construction and cement sector can be used. H. on the one hand, supplements such as fresh or recycled building materials, e.g. B. crushed building rubble, soil, sand, gravel, grit, expanded clay, slate or pearlite, plastic foam particles, natural or synthetic, inorganic or organic fibers or the like., Cements, natural or artificial puzzolans, such as. B. conventional fly ash or route, latent hydraulic substances such as e.g.
Blast furnace slag, quicklime, white lime hydrate, hydraulic lime, highly hydraulic lime, calcium sulfate, gypsum, burnt gypsum and / or anhydrites, alkali compounds, especially carbonates, bicarbonates, hydroxides, sulfates, silicates, aluminates and / or alkali-containing waste products, especially cement kiln dust, additional additives, cement kiln dust, additives Caca2, or on the other hand, plasticizers and hydrophobizing agents or blowing agents or other foaming agents, as well as surfactants - these additives are tailored to the situation as usual and mostly used when permanent strength is required.
The coordination takes place on the basis of soil samples taken on site, since in civil engineering not only the most varied soil conditions but also the most varied regulations have to be taken into account.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0803297U AT1603U1 (en) | 1996-08-20 | 1997-05-05 | USE OF ADDITIVE FLIGHT BAGS AS FILLING MATERIAL TO IMPROVE THE SOIL |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT149396 | 1996-08-20 | ||
| AT0803297U AT1603U1 (en) | 1996-08-20 | 1997-05-05 | USE OF ADDITIVE FLIGHT BAGS AS FILLING MATERIAL TO IMPROVE THE SOIL |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT1603U1 true AT1603U1 (en) | 1997-08-25 |
Family
ID=25595994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT0803297U AT1603U1 (en) | 1996-08-20 | 1997-05-05 | USE OF ADDITIVE FLIGHT BAGS AS FILLING MATERIAL TO IMPROVE THE SOIL |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT1603U1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT406584B (en) * | 1998-05-19 | 2000-06-26 | Spz Zementwerk Eiberg Gmbh & C | BINDING AGENTS FOR POLLUTANT CONTROL IN CONTAMINATED FLOOR AREAS AND / OR FOR SOIL STABILIZATION |
| DE20206256U1 (en) | 2002-04-19 | 2002-09-12 | Klose, Siegfried, 56626 Andernach | Additive for soil improvement and consolidation using secondary binders |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0209613A1 (en) * | 1985-07-20 | 1987-01-28 | GFR Gesellschaft für die Aufbereitung und Verwertung von Reststoffen mbH | Process for the environmentally acceptable disposal of wastes from coal-fired power plants |
| DE3639841A1 (en) * | 1985-05-22 | 1988-06-16 | Knauf Westdeutsche Gips | Construction material, process for the production thereof and use thereof |
-
1997
- 1997-05-05 AT AT0803297U patent/AT1603U1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3639841A1 (en) * | 1985-05-22 | 1988-06-16 | Knauf Westdeutsche Gips | Construction material, process for the production thereof and use thereof |
| EP0209613A1 (en) * | 1985-07-20 | 1987-01-28 | GFR Gesellschaft für die Aufbereitung und Verwertung von Reststoffen mbH | Process for the environmentally acceptable disposal of wastes from coal-fired power plants |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT406584B (en) * | 1998-05-19 | 2000-06-26 | Spz Zementwerk Eiberg Gmbh & C | BINDING AGENTS FOR POLLUTANT CONTROL IN CONTAMINATED FLOOR AREAS AND / OR FOR SOIL STABILIZATION |
| DE20206256U1 (en) | 2002-04-19 | 2002-09-12 | Klose, Siegfried, 56626 Andernach | Additive for soil improvement and consolidation using secondary binders |
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