FR2482974A1 - Compsn. of fly ash, calcium oxide or hydroxide, and calcium sulphate - for stabilising soils and treating effluents - Google Patents

Compsn. of fly ash, calcium oxide or hydroxide, and calcium sulphate - for stabilising soils and treating effluents Download PDF

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Publication number
FR2482974A1
FR2482974A1 FR8011299A FR8011299A FR2482974A1 FR 2482974 A1 FR2482974 A1 FR 2482974A1 FR 8011299 A FR8011299 A FR 8011299A FR 8011299 A FR8011299 A FR 8011299A FR 2482974 A1 FR2482974 A1 FR 2482974A1
Authority
FR
France
Prior art keywords
soils
fly ash
plaster
treatment
effluents
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Withdrawn
Application number
FR8011299A
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French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOULONNAIS CHAUX DOLOMIES
Original Assignee
BOULONNAIS CHAUX DOLOMIES
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BOULONNAIS CHAUX DOLOMIES filed Critical BOULONNAIS CHAUX DOLOMIES
Priority to FR8011299A priority Critical patent/FR2482974A1/en
Publication of FR2482974A1 publication Critical patent/FR2482974A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/008—Sludge treatment by fixation or solidification
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • 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
    • C04B28/10—Lime cements or magnesium oxide cements
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/02—Well-drilling compositions
    • C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Structural Engineering (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

The mixt. contains (A) 60-75% silico-aluminous fly ash; (B) 15-35% CaO or Ca(OH)2 and (C) 5-15% CaSO4. In soil treatment the following mixts. are pref:- clay soils 65% (A), 23-25% (B) and 10-12% (C); for alluvial soils 70% (A), 18-20% (B), and 10-12%; and for sandy soils 75% (A),10-15% (B) and 10-15% (C). For (C) plaster may be used or plaster oven dust contg. anhydrite, plaster, a gypsum. It reinforces the mechanical resistance of soils combining the effects of lime and cement treatment presently used in a single operation. In treating industrial and urban effluent, it provides a combined action of flocculation, neutralisation and fixation.

Description

La présente invention concerne la production d'un matériau nouveau et son application : 1 ) à la stabilisation des sols en vue de renforcer leur résistam
mécanique en traction et compression, ainsi que leur tenue à
l'eau et au gel.The present invention relates to the production of a new material and its application: 1) to the stabilization of soils in order to strengthen their resistance;
mechanical tension and compression, as well as their resistance to
water and frost.

2 > ) au traitement des effluents industriels et urbains en vue de
- floculer les effluents (par ajout d'une faible dose de matdriau)
- fixer et de solidifier les effluents (par ajout d'une dose
importante de matériau variant avec la teneur en eau)
- floculer les effluents, puis fixer et solidifier le floculat
Il existe actuellement d'autres produits pouvant stabiliser les sols, ce sont notamment la chaux grasse et le ciment.2>) to the treatment of industrial and urban effluents with a view to
- Flocculate the effluents (by adding a low dose of material)
- fix and solidify the effluents (by adding a dose
significant amount of material varying with the water content)
flocculate the effluents, then fix and solidify the flocculate
There are currently other products that can stabilize soils, including lime and cement.

Le matériau, objet de la présente invention, est caractérisé par : a) le fait qu'il provoque dans le sol des réactions identiques à
celles obtenues par un traitement à la chaux, à savoir l'abatis
sement des limites de plasticité et de liquidité et le déplace
ment de l'optimum Proctor vers des teneurs en eau plus élevée@
ce traitement est particulièrement intéressant en sol argileux
et dans les limons' b) Le fait qu'il apporte au sol à court terme et à long terme une
résistance identique à celle obtenue avec un traitement au
ciment ; ce traitement est bien adapté aux sols sableux.The material, object of the present invention, is characterized by: a) the fact that it causes in the soil reactions identical to
those obtained by a treatment with lime, namely the abatis
the limits of plasticity and liquidity and moves it
Proctor optimum towards higher water contents @
this treatment is particularly interesting in clay soil
and in silt 'b) The fact that it brings to the soil in the short term and in the long term a
resistance identical to that obtained with
cement; this treatment is well adapted to sandy soils.

Le matériau, objet de la présente invention, regroupe en fait
les qualités du traitement à la chaux et au ciment ; il est
effectué en une seule opération, ce qui amène une économie
importante à la mise en oeuvre sur le chantier.The material which is the subject of the present invention is in fact
the qualities of the lime and cement treatment; he is
performed in one operation, which leads to an economy
important to implementation on the site.

En ratière de traitement d'effluents industriels et urbains, il existe actuellement un certain nombre de techniques utilisées le matériau, objet de la présente invention, a essentiellement trois actions distinctes qui peuvent être utilisées séparément ou combinées entre elles, ce sont :
- la floculation des effluents,
- la neutralisation des effluents,
la la fixation et la solidification des effluents0'
Le matériau, objet de la présente invention est obtenu par simple mélanhge de 3 produits pulvérulents qui sont %
A - les cendres volantes silico-alumineuses de centrale thermique.In the field of treatment of industrial and urban effluents, there are currently a number of techniques used the material object of the present invention has essentially three distinct actions that can be used separately or combined with each other, these are:
- flocculation of the effluents,
- the neutralization of the effluents,
fixing and solidification of effluents
The material which is the subject of the present invention is obtained by simple mixing of 3 pulverulent products which are%
A - silico-aluminous fly ash from thermal power plant.

B - La chaux vive à haute réactivité pour le traitement des sols
et éventuellement la chaux hydratée pour le traitement de so;
sableux, la chaux hydratée pour le traitement des effluents ou
la chaux vive,
C - Le plâtre ou les poussières de four à plâtre contenant de
l'anhydrite, du plâtre, du gypse.B - High reactivity quicklime for soil treatment
and optionally hydrated lime for the treatment of so;
sandy, hydrated lime for the treatment of effluents or
quicklime,
C - Plaster or dust of a plaster oven containing
anhydrite, plaster, gypsum.

Le matériau, objet de la présente invention, a une composition pon-
dérale en constituants A - B - C variable suivant les utilisations.The material, object of the present invention, has a composition pon-
Derived in constituents A - B - C variable according to the uses.

A titre d'exemples non limitatifs, on peut donner les indications
suivantes :
I) - Stabilisation des sols,
. Sols argileux A 65 %
B 23 % à 25 %
C 10 % à t2 %
* Sols limoneux A 70 %
B 18 % à 20 %
C 10 % à 12 %
. Sols sableux A 75 %
B 10 % à 15 %
C 10 0 à 15 %
les résistances mécaniques importantes à court et long terme
(analogues à celles obtenues avec un traitement au ciment) sor
obtenues par l'attaque sulfo-calcique de la cendre volante.By way of non-limiting examples, it is possible to give the indications
following:
I) - Soil stabilization,
. 65% clay soil
B 23% to 25%
C 10% to 2%
* 70% silty soils
B 18% to 20%
C 10% to 12%
. 75% sandy soils
B 10% to 15%
C 10 to 15%
important mechanical resistance in the short and long term
(similar to those obtained with a cement treatment)
obtained by the sulpho-calcic attack of fly ash.

Dans les mélanges, objets de la présente invention, la chaux
est toujours en excès par rapport à la quantité requise en vue
de ltattaque sulfo-calcique de la cendre ; cet excès est
destiné à jouer le rôle de stabilisabion à la chaux et est
ajusté en fonction de la-nature du sol à traiter.In the mixtures, objects of the present invention, lime
is always in excess of the quantity required for
the sulpho-calcic attack of the ash; this excess is
intended to play the role of lime stabilizer and is
adjusted according to the nature of the soil to be treated.

II) - Traitement des effluents
A 60 à 75 %
B 15 à 35 %
C 5 à 15 %
Le matériau, objet de la présente invention, est fabriqué dans
une installation qui comprend s
. 3 silos de stockage des matières premières A, et C
; 1 trémie peseuse dosant les constituants A, 3, et C
. 1 malaxeur homogénéisant le mélange . 1 ou plusieurs silos de stockage au ou des produits finis, II) - Effluent treatment
60 to 75%
B 15 to 35%
C 5 to 15%
The material, object of the present invention, is manufactured in
an installation that includes
. 3 storage silos for raw materials A, and C
; 1 weigh hopper dosing the constituents A, 3, and C
. 1 kneader homogenizing the mixture. 1 or more storage silos to the finished products,

Claims (2)

RE\IENDICATION 10) Produit destiné à la stabilisation des sols et aux traitements des effluents caractérisé en ce qu'il est constitué par un mélange de 3 constituants A, B et C A : cendres volantes silico-alumineuses dans des proportions deDESCRIPTION 10) Product intended for the stabilization of soils and the treatment of effluents, characterized in that it consists of a mixture of 3 constituents A, B and C A: silico-aluminous fly ash in proportions of 60 à 75 % ; 60 to 75%; B . Oxyde ou hydroxyde de calcium dans des proportions de 15 à 35  B. Oxide or calcium hydroxide in proportions of 15 to 35 C : Sulfate de calcium anhydre ou hydraté dans des proportions de C: Anhydrous or hydrated calcium sulphate in proportions of 5 à 15 %. 5 to 15%. 20) Produit selon revendication 1 destiné à la stabilisation des sols argileux ;20) Product according to claim 1 for the stabilization of clay soils; constitué par mélange de consisting of a mixture of A : 65 % A: 65% B : 23 à 25 Â  B: 23 to 25 Â C : 10 à 12 % 30) Produit selon revendication 1 destiné à la stabilisation des sols limoneux C: 10 to 12% 30) Product according to claim 1 for the stabilization of loamy soils constitué par mélange de A : 70 00  consisting of a mixture of A: 70 00 B : 18 à 20 % B: 18 to 20% C : 10 à 12 eó 40) Produit selon revendication 1 destiné à la stabilisation des sols sableux C: 10 to 12 eo 40) Product according to claim 1 for the stabilization of sandy soils constitué par mélange de consisting of a mixture of A ; 75 % AT ; 75% B : 10 à 15 % B: 10 to 15% C : 10 à 15 % 5 ) Procédé de fabrication des produits selon l'une des revendications 1, 2, 3 C: 10 to 15% 5) Method of manufacturing the products according to one of claims 1, 2, 3 et 4, caractérisé par le fait qu'il s'agit d'un dosage et d'un mélange des and 4, characterized in that it is a dosage and a mixture of constituants.  components.
FR8011299A 1980-05-21 1980-05-21 Compsn. of fly ash, calcium oxide or hydroxide, and calcium sulphate - for stabilising soils and treating effluents Withdrawn FR2482974A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8011299A FR2482974A1 (en) 1980-05-21 1980-05-21 Compsn. of fly ash, calcium oxide or hydroxide, and calcium sulphate - for stabilising soils and treating effluents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8011299A FR2482974A1 (en) 1980-05-21 1980-05-21 Compsn. of fly ash, calcium oxide or hydroxide, and calcium sulphate - for stabilising soils and treating effluents

Publications (1)

Publication Number Publication Date
FR2482974A1 true FR2482974A1 (en) 1981-11-27

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FR (1) FR2482974A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2638109A1 (en) * 1988-10-18 1990-04-27 Salzburger Stadtwerke Ag PROCESS FOR BINDING AND CONSOLIDATING SOLID AND LIQUID MATERIALS CONTAINING HEAVY METALS
FR2641485A1 (en) * 1989-01-07 1990-07-13 Salzburger Stadtwerke Ag METHOD FOR REDUCING THE GASES EMITTED BY GARBAGE DISCHARGES
EP0900767A1 (en) * 1997-09-03 1999-03-10 Wolf-Dieter Dr. Schwidop Process for recycling of sewage sludge
CN114988834A (en) * 2022-06-08 2022-09-02 浙江工业大学 Early-strength composite curing agent for improving coastal saline soil and application thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2638109A1 (en) * 1988-10-18 1990-04-27 Salzburger Stadtwerke Ag PROCESS FOR BINDING AND CONSOLIDATING SOLID AND LIQUID MATERIALS CONTAINING HEAVY METALS
FR2641485A1 (en) * 1989-01-07 1990-07-13 Salzburger Stadtwerke Ag METHOD FOR REDUCING THE GASES EMITTED BY GARBAGE DISCHARGES
EP0900767A1 (en) * 1997-09-03 1999-03-10 Wolf-Dieter Dr. Schwidop Process for recycling of sewage sludge
CN114988834A (en) * 2022-06-08 2022-09-02 浙江工业大学 Early-strength composite curing agent for improving coastal saline soil and application thereof

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