AU668471B2 - Injectable cement grout with improved properties - Google Patents

Injectable cement grout with improved properties Download PDF

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Publication number
AU668471B2
AU668471B2 AU64887/94A AU6488794A AU668471B2 AU 668471 B2 AU668471 B2 AU 668471B2 AU 64887/94 A AU64887/94 A AU 64887/94A AU 6488794 A AU6488794 A AU 6488794A AU 668471 B2 AU668471 B2 AU 668471B2
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AU
Australia
Prior art keywords
grout
hydraulic binder
weight
injectable
particles
Prior art date
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Ceased
Application number
AU64887/94A
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AU6488794A (en
Inventor
Francoise Marie Dufournet Bourgeois
Michel Auguste Georges Gandais
Yves Marie Francois Rene Lacour
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.)
Sondages Injections Forages SIF Enterprise Bachy
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SIF ENTREPRISE
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Application filed by SIF ENTREPRISE filed Critical SIF ENTREPRISE
Publication of AU6488794A publication Critical patent/AU6488794A/en
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Publication of AU668471B2 publication Critical patent/AU668471B2/en
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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
    • C04B28/02—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
    • 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
    • C04B20/0076—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 characterised by the grain distribution
    • 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
    • C09K17/00—Soil-conditioning materials or soil-stabilising materials
    • C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
    • C04B2111/00706—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like around pipelines or the like
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Treatment Of Sludge (AREA)

Abstract

Injectable grout including a hydraulic binder in suspension in water, characterised in that it additionally includes, relative to the weight of the hydraulic binder, (A) from 2 to 50 % by weight of particles of at least one inorganic substance whose median diameter is smaller than half the median diameter of the particles of the hydraulic binder, and (B) from 0.05 to 5 % by weight of a hydroxyethyl cellulose. Use in civil engineering.

Description

c i i ;i 668471 AUSTRALIA Patents Act COMPLETE SPECIFICATION
(ORIGINAL)
Class Int. Class Application Number: Lodged: Complete Specification Lodged: Accepted: Published: Priority Related Art:
CCC;
C C C cC C Ce I c, I Name of Applicant: Sondages Injections Forages "SIF" Entreprise Bachy Actual Inventor(s): Michel Auguste Georges Gandais Francoise Marie Dufournet Bourgeois Yves Marie Francois Rene Lacour Address for Service: PHILLIPS ORMONDE FITZPATRICK Patent and Trade Mark Attorneys 367 Collins Street Melbourne 3000 AUSTRALIA Invention Title: INJECTABLE CEMENT GROUT WITH IMPROVED PROPERTIES Our Ref 372426 POF Code: 1149/52667 The following statement is a full description of this invention, including the best method of performing it known to applicant(s): -1i I 11I1 Field of the invention The invention relates to a new injectable grout with improved properties.
Prior art Injectable grouts based on hydraulic binder are widely employed for the consolidation and/or sealing treatment of soils or of structures. These grouts may be based on Portland cement with or without secondary constituents, on cement produced from blast furnace slag, on alumina cement and the like.
These grouts can be injected to fill the intergranular cavities in soils, fissures in a terrain or a structure, or spaces intended to provide seals, for example of anchor rods or of nails or of reinforced micropiles.
The most important properties of an injectable grout are the stability, the drainage resistance, the viscosity of the grout at the time of its use and the j compressive strength of the set grout.
Although a wide range of grouts is available, there is always need for 15 products with higher performance.
Summary of the invention The invention is therefore aimed at providing an injectable grout based on hydraulic binder with improved properties, in particular with high stability.
.tee More precisely, the invention relates to an injectable grout including a hydraulic binder in suspension in water, which additionally includes, relative to the weight of the hydraulic binder, from 2 to 50% by weight of particles of at least one mineral substance whose median diameter is smaller than half the median diameter of the particles of the hydraulic binder, and from 0.05 to 5% by weight of hydroxyethyl cellulose.
The invention also relates to a process for consolidation and/or sealing of granular media and/or of fissured media by injection into such a medium of a curable grout based on a hydraulic binder, wherein the said grout is as defined above.
The particulate mineral substance may be a substance which is inert towards the hydraulic binder or reactive with the latter, provided that this reactivity does not appreciably degrade the essential properties of the grout. Nonlimiting B examples of powders of mineral substances that can be employed are powdered 2 mica, talc, kaolin, calcite, felspar, dolomite, silica, titanium dioxide, alumina and the like. Where silica is concerned, fume silica and ground or precipitated silica can be employed equally well.
The mineral substance must have a finer particle size than that of the hydraulic binder employed, because its function is to provide a better particle size distribution of the particles in suspension.
Tests have shown that better results are obtained when the median particle diameter d 50 of the mineral substance is smaller than half the median particle diameter of hydraulic binder. The ds, of the powdered mineral substance will usually be between 0.01 and 10 preferably between 0.01 and 5 pm.
The proportion of mineral substance is not very critical and depends on the fineness of the powder employed. Broadly speaking, it can represent from 0.2 to 50% of the weight of the hydraulic binder. Below of the effect of the addition of mineral substance is insignificant, whereas above 50% the addition of the mineral substance can degrade the properties of the grout or of the product obtained after the grout has set. It is usually preferred to incorporate from 1 to of particulate mineral substance in particular 2 to Hydroxyethyl celluloses are products which are well known and commerically available, which it seems pointless to describe further here. They are employed in the invention as water-retainers.
The Applicant Company has found that, among the various types of cellulose ethers, only hydroxyethyl celluloses and methyl hydroxyethyl celluloses are usable, since carboxymethyl celluloses and carboxymethyl hydroxyethyl celluloses cause flocculation of the grouts. Furthermore, the Applicant Company S 25 has found that hydroxyethyi celluloses give grouts exhibiting properties that are S. much superior to those of the grouts including methyl hydroxyethyl celluloses, especially in respect of viscosity, drainage resistance and mechanical strength in the short term.
The hydroxyethyl cellulose (HEC) may be employed in a proportion of 0.05 to 5% of the weight of the hydraulic binder. Below 0.05% the improving effect produced is not significant and above 5% the viscosity of the grout tends to become too high. The best results are obtained with a proportion of HEC 1 ^11__1 representing 0.1 to 1% of the weight of the hydraulic binder. An HEC grade exhibiting a low degree of viscosity will preferably be employed if it is desired to obtain the lowest possible viscosity of the grout.
The hydraulic binder employed may be any known hydraulic binder, for example Portland cement, slag cements, alumina cements, pozzolanas, fly ash and the like.
It is also possible to incorporate into the grout any of the adjuvants commonly employed in compositions based on hydraulic binder, especially plasticizers, or in grouts, for example calcareous or siliceous fillers of coarser particle size than that of the mineral substance of the invention.
The proportion of hydraulic binder in the water is that of the conventional grouts. To give an indication, the hydraulic binder/water weight ratio may vary from 0.2 1 to 3 1, preferably from approximately 0.5 1 to 1.5 1, depending on the type of hydraulic binder. In particular, in the case of ultrafine cement the C/W ratio will be lower than 1 preferably from 0.3 :1 to 0.8 1.
The invention will now be illustrated further by the following nonlimiting examples.
~In the examples the properties of the grouts were determined by the following methods.
The drainage resistance is measured by a filtration test. The apparatus employed is a Baroid(R) filter press of the kind commonly employed for characterizing drilling muds. A volume of approximately 600 cm 3 of grout is introduced into a cell whose lower part consists of a filter surface. A pressure of 0.7 MPa is applied to the grout. The quantity of water passing through the filter surface is then measured as a function of the period of application of the pressure and compared with the result obtained with a control grout free from the additives and of the invention.
The stability of the grout is determined by a settling test. One liter of grout is introduced into a graduated glass test tube. The grout is kept at rest for 2 hours and the quantity of supernatant water is then measured. This water, expressed as percentage of the initial volume, characterizes the settlement of the grout.
l i i i The viscosity, expressed in seconds, is the time taken by one liter of grout to flow through a Marsh cone in which the diameter of the nozzle is equal to 4.75 mm.
The compressive strength Sc is measured on the set grout by the simple compressive crushing method for cylindrical test pieces with a slenderness ratio of 2 (diameter 40 mm, height 80 mm) with the aid of a crushing press after 1, 2, 3 or 4 days' setting, depending on the case, and is expressed in MPa.
Examples 1 to 9, control examples 1 to 5 and comparative examples 1 and 2.
Grouts which had the compositions summarized in the table below were prepared by the following general operating method: The slaking water is introduced into a mixer, the mixer is started up, the cellulose ether is dissolved in the slaking water and the hydraulic binder is then added and, finally, the fine powder.
The properties of the resulting grouts were determined by the abovementioned methods and the results have been collected in the table below.
In control examples 1 and 2, examples 1 and 2 and comparative examples 1 and 2 the binder employed was a CLK 45 type blast furnace slag cement from the Societe des Ciments Frangais, which had a d5o of approximately 11 /um.
In the case of the control examples 3 and 4 and examples 3, 4, 5 and 6, the binder employed was a CPA 55 type Portland cement also from the Socidtd des Ciments Frangais, which had a d 5 s of approximately 18 pm.
t ic In examples 7-9 and control example 5 the binder employed was an Sultrafine cement sold under the trade name Spinor A by the Soci6te Ciments d'Origny, which had a ds 0 of 2.5 pm.
25 The source and the applicable d 5 o of the other materials employed were as follows: Supplier Trade name d in m t SiO 2 Elkem Microsilica Al 2 0 3 Degussa Aluminum Oxide C 0.02 TiO 2 Degussa Titanium Dioxide P25 0.03 HEC 20 Hoechst Tylose HEC 300 Hoechst Tylose H300 P MHEC 300 Hoechst Tylose MH 300 P
TABLE
Cellulose ether Mineral powder Filtrate Marsh Settle- Sc, MPa Ex. C/W decrease/ visco- ment at Nature Degree Nature d, control, sity, 2 hours, Id 2d 3d 4d of vis- m seconds cosity Control 1 1 0 0 21 Ex. 1 1 HEC 0.5 300 Si02 5 0.50 98 46 4 2.2 Comp. ex. 1 1 MHEC 0.5 300 SiO, 5 0.50 87 60 3 Control 2 1.5 0 0 11 Ex. 2 1.5 HEC 0.3 20 SiO, 5 0.50 97 42 0 10.2 Comp. ex. 2 1.5 MHEC 0.3 20 SiO 2 5 0.50 71 58 0 Control 3 1 0 0 18 Ex. 3 1 HEC 0.3 20 SiO2 2.5 0.50 79 36 2 1.8 5.3 Ex. 4 1 HEC 0.3 20 TiO0 5 0.03 73 37 3 1.8 4.7 Control 4 1.5 0 0 13 Ex. 5 1.5 HEC 0.4 20 SiO, 5 0.50 97 49 0 6.5 16.5 Ex. 6 1.5 HEC 0.4 20 TiO0 2 0.03 88 60 1 4.4 10.7 Control 5 0.5 0 0 13 Ex. 7 0.5 HEC 0.4 20 SiO, 5 0.50 51 36 0 0.98 1.75 Ex. 8 0.5 HEC 0.4 20 TiO, 2 0.03 34 38 0 1.15 2.27 Ex. 9 0.5 HEC 0.4 20 Al20, 2 0.02 47 37 0 0.88 2.10 Notes C/W HEC MHEC Cement/water weight ratio.
Weight percentage of the constituent Hydroxyethyl cellulose.
Methyl hydroxyethyl cellulose.
Not measured because settlement very in relation to cement.
high (specimens not significant).
~N lr 6 From this table it can be seen that the grouts of the invention have properties which are markedly superior to those of the controls or to those of grouts incorporating methyl hydroxyethyl cellulose, despite the close relationship of the latter to hydroxyethyl cellulose.
artt **t 1 V. I *54
S
S.
S

Claims (8)

1. An injectable grout including a hydraulic binder in suspension in water, which additionally includes, relative to the weight of the hydraulic binder, from 2 to 50% by weight of particles of at least one mineral substance whose median diameter is smaller than half the median diameter of the particles of the hydraulic binder, and from 0.05 to 5% by weight of hydroxyethyl cellulose.
2. A grout as claimed in claim 1, wherein the proportion of the ingredient represents 1 to 10% of the weight of the hydraulic binder.
3. A grout as claimed in claim 2, wherein the proportion of the ingredient represents 2 to 5% of the weight of the hydraulic binder.
4. A grout as claimed in any one of claims 1 to 3, wherein the proportion of the ingredient represents from 0.1 to 1% of the weight of the hydraulic binder.
5. A grout as claimed in any one of claims 1 to 4, wherein the ingredient is chosen from silica, titanium dioxide and alumina.
6. A process for consolidation and/or sealing of granular media and/or of i fissured media by injection into such a medium of a curable grout based on a 04 0 hydraulic binder, wherein the said binder is as defined in any one of claims 1 to
7. An injectable grout substantially as herein described with respect to any one of the examples.
8. A process for consolidation and/or sealing of granular media and/or of fissured media substantially as herein described with reference to any one of the examples. *4 0 DATED 20 July 1995 PHILLIPS ORMONDE FITZPATRICK Attorneys for: SONDAGES INJECTIONS FORAGE'"SIE" ENT' PSE BACH II "t. 441 Ijj VUo I i: I Injectable cement grout with improved properties. Inventors Michel, Auguste, Georges, GANDAIS Frangoise, Marie, DUFOURNET BOURGEOIS Yves, Marie, Frangois, Ren6, LACOUR Applicant: SONDAGES INJECTIONS FORAGES ENTREPRISE BACHY ABSTRACT OF THE DISCLOSURE The invention relates to an injectable grout including a hydraulic binder in suspension in water, which additionally comprises, relative to the weight of the hydraulic binder, from 2 to 50% by weight of particles of at least one mineral substance whose median diameter is smaller than half the median diameter of the particles of the hydraulic binder, and from 0.05 to 5% by weight of a hydroxyethyl cellulose. Use in the civil engineering field. *4 9 0* 0 L
AU64887/94A 1993-07-02 1994-06-22 Injectable cement grout with improved properties Ceased AU668471B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9308128 1993-07-02
FR9308128A FR2707082B1 (en) 1993-07-02 1993-07-02 Injectable cement grout with improved properties.

Publications (2)

Publication Number Publication Date
AU6488794A AU6488794A (en) 1995-01-12
AU668471B2 true AU668471B2 (en) 1996-05-02

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AU64887/94A Ceased AU668471B2 (en) 1993-07-02 1994-06-22 Injectable cement grout with improved properties

Country Status (9)

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EP (1) EP0631994B1 (en)
AT (1) ATE162165T1 (en)
AU (1) AU668471B2 (en)
CA (1) CA2127226C (en)
DE (1) DE69407878D1 (en)
FR (1) FR2707082B1 (en)
HK (1) HK1002430A1 (en)
MA (1) MA23243A1 (en)
MY (1) MY110728A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4447575C1 (en) * 1994-08-12 1998-11-19 Dyckerhoff Ag Fine cement-binder mixt.
EP0755992B1 (en) * 1995-07-25 2000-01-12 Dyckerhoff Aktiengesellschaft Injectable composition and suspensions prepared during the injection
DE19537616C2 (en) * 1995-07-25 1998-01-22 Dyckerhoff Ag Sodium bentonite-free injection medium suspension
US6033469A (en) * 1995-07-25 2000-03-07 Dyckerhuff Ag Injection preparation suspension free of sodium bentonite
DE19854478C2 (en) * 1998-11-25 2002-03-28 Dyckerhoff Ag Use of a sulphate carrier-free hydraulic injection binder composition

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655004A (en) * 1946-02-25 1953-10-13 Louis S Wertz Composition for and method of solidifying porous masses and structures
US3558335A (en) * 1966-04-04 1971-01-26 Mobil Oil Corp Well cementing compositions
FR2390400A2 (en) * 1977-05-13 1978-12-08 Produits Refractaires Cement contg. steel-making slag or aluminous cement - and used to mfr. building concrete or refractories

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655004A (en) * 1946-02-25 1953-10-13 Louis S Wertz Composition for and method of solidifying porous masses and structures
US3558335A (en) * 1966-04-04 1971-01-26 Mobil Oil Corp Well cementing compositions
FR2390400A2 (en) * 1977-05-13 1978-12-08 Produits Refractaires Cement contg. steel-making slag or aluminous cement - and used to mfr. building concrete or refractories

Also Published As

Publication number Publication date
EP0631994B1 (en) 1998-01-14
AU6488794A (en) 1995-01-12
CA2127226C (en) 1997-07-29
DE69407878D1 (en) 1998-02-19
FR2707082B1 (en) 1995-09-08
HK1002430A1 (en) 1998-08-21
MA23243A1 (en) 1994-12-31
MY110728A (en) 1999-01-30
ATE162165T1 (en) 1998-01-15
CA2127226A1 (en) 1995-01-03
EP0631994A1 (en) 1995-01-04
FR2707082A1 (en) 1995-01-06

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