WO1997021876A1 - Melange de materiaux granulaires pour le renforcement des sols et procede d'elaboration - Google Patents
Melange de materiaux granulaires pour le renforcement des sols et procede d'elaboration Download PDFInfo
- Publication number
- WO1997021876A1 WO1997021876A1 PCT/FR1996/001942 FR9601942W WO9721876A1 WO 1997021876 A1 WO1997021876 A1 WO 1997021876A1 FR 9601942 W FR9601942 W FR 9601942W WO 9721876 A1 WO9721876 A1 WO 9721876A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fibers
- mixture
- granular materials
- masterbatch
- proportion
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/003—Foundations for pavings characterised by material or composition used, e.g. waste or recycled material
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
- E01C13/06—Pavings made in situ, e.g. for sand grounds, clay courts E01C13/003
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
Definitions
- the invention relates to soil preparation techniques in which sands or granular substitute materials are used. It relates in particular to the production of underlays for paths, roads or sports grounds.
- the second phase consists in depositing, on the ground thus prepared, a form layer whose first function will be to allow the movement of convoys and vehicles on the ground while avoiding degrading it or clogging up the site machinery. Other layers will then be deposited.
- granular materials are known which, thanks to the mineral fibers which they contain, reinforce the shape layers.
- a method is proposed for obtaining the mixture constituting the form layer which consists, in a power station, of incorporating fibers directly into granular materials, in particular sand of local origin.
- the invention sets itself the task of providing a method for preparing a mixture of granular materials and fibers which does not show the drawbacks of the preceding methods.
- a masterbatch is constituted which is intended after addition, in particular of mineral or organic granular materials, for the production of soil layers, layers and sub-layers of terrain or pavement.
- Said mixture is itself based on a mixture of granular materials and fibers, the latter being in a proportion by weight of 6 to 60% of the dry mixture.
- the masterbatch of the invention therefore makes it possible, since it has an average concentration, to easily dilute the fibers in order to reach the low contents which one seeks, in general, to have in the soil.
- the fibers, and in particular the fibers. mineral and especially glass fibers, are indeed so effective that one seeks to have the lowest possible concentrations.
- the proportion of fibers in the masterbatch is between 20 and 50%.
- This comprises granular materials and fibers, the granular materials preferably being essentially based on sand.
- the product of the invention allows users to always have the same basic material, which they advantageously combine with soils of different nature and in varying proportions, so as to obtain the expected result.
- the fibers are preferably mineral fibers, in particular glass fibers in the form of filaments in bundles of at least 40 filaments each and with a unit diameter between 5 and 25 microns.
- the best results have been obtained with a mixture in which the mineral fibers comprise at least 10% of glass fibers with a length greater than 20 mm. We have indeed found that it is with fibers of this type that we obtain the best results.
- the invention also provides that the masterbatch comprises a proportion by weight of water greater than 10%.
- the presence of water in small quantity in the masterbatch facilitates, indeed, the subsequent mixtures.
- the invention also proposes a method for producing the masterbatch. It is characterized by two essential phases: on the one hand, the mixing of granular materials and water and, secondly, the mixing of wet granular materials and fibers.
- the inventors have in fact found that if one started by mixing the dry granular materials with water, it was then much easier to proceed with the regular distribution of the fibers in the granular materials insofar as they were wet.
- the invention also relates to the application of the masterbatch to the production of a final mixture of granular materials and fibers in which the proportion of the fibers relative to the total mixture is less than 5%.
- This type of mixture is used, in particular if the weight proportion of the fibers is less than 3% or preferably of the order of 1%, for reinforcing equestrian tracks.
- Another application is that of reinforcing existing floors that one seeks to renovate, and then the masterbatch is kneaded with the constituents of the floor, until a final mixture is obtained with a proportion of fibers greater than 0. , 01%.
- the masterbatch is regularly distributed on the ground using a salt spreader, in particular that using a centrifugal ejector, or an agricultural spreader, before mixing.
- a salt spreader in particular that using a centrifugal ejector, or an agricultural spreader, before mixing.
- the invention also relates to a device for producing the masterbatch. It includes a plow share mixer.
- a particularly suitable mixer is a continuous mixer which has a drum separated into two longitudinal parts. This type of mixer makes it possible to mix the granular materials and water first, and then to add the fibers, in relatively large quantity, they are thus regularly distributed in the finished masterbatch.
- the following description will make it possible to understand the invention and to grasp all the advantages thereof.
- the advantage of having a mixture of granular materials such as sand, industrial ash or residues of all kinds, of a relatively well defined particle size, which are mixed with fibers which give them better resistance, in particular at turnover, is obvious.
- the I.P.I. which was 25 without fiber, increases to 40 if 0.05% by weight of fiber is added (relative to the dry starting materials). In all cases, the fibers make it possible to increase the I.P.I. at least 10 points.
- the masterbatch of the invention is intended to serve to reinforce soils in all the applications mentioned both in document WO 94/28248 and in document EP-A-0 71 6 1 86 or the document EP-A-0 71 6 1 87.
- the procedure is carried out in the usual manner as if, in place of the masterbatch, it was fibers.
- devices intended to distribute pulverulent materials on the roads in particular those suitable for treating frozen roads with various powders such as antifreeze salts or non-slip powders.
- Devices of this kind are, for example, salt spreaders which use centrifugal force ejectors, and in particular, those which comprise one or more discs with substantially vertical axis, in rotation in their plane, on which the masterbatches are deposited.
- Another technique for implementing the masterbatches of the invention provides a very significant advantage, since the conditions of implementation, usually practiced, are incompatible with direct use. fibers and in particular glass fibers. It is a reinforcement technique for horse tracks, in which we start by mixing granular materials with fibers inside a spinning top of the kind
- Concrete mixer that is to say, a cylinder with an inclined axis, which is rotated about this axis, with vanes inside, usually used as a concrete mixer.
- a concrete mixer For the reinforcement of the equestrian tracks, one wishes to have a relatively important concentration of fibers, since it must reach approximately 1%, unfortunately, if one uses the fibers directly by introducing them into the concrete mixer, they deteriorate and especially , they provide a mixture which is not homogeneous.
- a masterbatch of the invention is introduced with a large proportion of fibers
- the granular materials, which are the essential or at least a large part, of the masterbatch are easily mixed with the materials granular which are already present in the router, so that the fibers diffuse easily inside the material. It is thus possible, in reduced times, to obtain a mixture with a completely homogeneous distribution of the fibers in the granular materials.
- the fact that the distribution is homogeneous makes it possible to lower the quantity of fibers necessary to obtain a given result. It can thus be seen that the economic impact of the process of the invention is far from negligible.
- the first method partly uses the techniques described in document WO 94/28248 or that described in document EP-A-0 71 6 1 86.
- the principle consists in cutting sections of waxed locks from the assembly of several wires, each with a large number of glass filaments. This is, for example, the product STABI-FIL from the company VETROTEX. Each wick with several threads has a very large number of filaments, in general more than 400, 1,200 for example.
- the usual machines are used for cutting the textile glass strands, such as those described in the European patent EP-B-0 040 1 45. During the tests, the cutting length was adjusted to 25 mm.
- the cut wicks provide precisely 25 mm long bundles, which are yarn segments with each the same number of filaments.
- Each wire has 48 filaments, each filament having a diameter of about 11 microns.
- the first method is a discontinuous method.
- a sand of the “Parisian” sand type that is to say, with essentially a particle size between 0 and
- the second method of preparation of the masterbatch of the invention which has been tested is very similar to the first, with two exceptions almost on the one hand, the method is continuous, and on the other hand, fibers of a other origin than the previous ones.
- the fibers we used were not directly from cutting wicks with a defined length, but because of their diverse origins, and the way in which they were cut, their lengths were varied. What is important for the masterbatch of the invention is that at least 10% of the fibers have a length greater than 20 mm.
- the mixer is of the so-called plow share type. It is, for example, a Recycler CB model from the company LODIGE which is particularly suitable for the preparation of a pulverulent mixture on fibers.
- Tests were carried out, in which there were up to 60% of fibers in the dry mixture.
- the operations are successively mixing dry sand and water, then, in a second step, mixing fibers and wet sand.
- the masterbatch is stored in “big bags” which are closed as quickly as possible, and in which it will remain until it is used on site.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Soil Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Road Paving Structures (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU11006/97A AU1100697A (en) | 1995-12-12 | 1996-12-05 | Mixture of granular materials for soil reinforcement, and method for making same |
EP96941705A EP0808390A1 (fr) | 1995-12-12 | 1996-12-05 | Melange de materiaux granulaires pour le renforcement des sols et procede d'elaboration |
BR9607299A BR9607299A (pt) | 1995-12-12 | 1996-12-05 | Mistura padrão processo e dispositivo para obter a mesma e aplicação da mistura |
JP9521780A JPH11500801A (ja) | 1995-12-12 | 1996-12-05 | 地面を強化するための粒状材料の混合物および混合方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR95/15114 | 1995-12-12 | ||
FR9515114A FR2742175B1 (fr) | 1995-12-12 | 1995-12-12 | Melange de materiaux granulaires pour le renforcement des sols et procede d'elaboration |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997021876A1 true WO1997021876A1 (fr) | 1997-06-19 |
Family
ID=9485699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1996/001942 WO1997021876A1 (fr) | 1995-12-12 | 1996-12-05 | Melange de materiaux granulaires pour le renforcement des sols et procede d'elaboration |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0808390A1 (fr) |
JP (1) | JPH11500801A (fr) |
AU (1) | AU1100697A (fr) |
BR (1) | BR9607299A (fr) |
CA (1) | CA2212928A1 (fr) |
FR (1) | FR2742175B1 (fr) |
WO (1) | WO1997021876A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999009114A1 (fr) * | 1997-08-15 | 1999-02-25 | Ppg Industries Ohio, Inc. | Melange de sols renforces par fibres |
NL1011066C2 (nl) * | 1999-01-19 | 2000-07-20 | Transportbedrijf Van Vliet B V | Hydraulisch menggranulaat voor toepassing als funderingsmateriaal in de wegenbouw. |
WO2012123507A1 (fr) | 2011-03-14 | 2012-09-20 | Rockwool International A/S | Utilisation de fibres minérales |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103174125A (zh) * | 2013-03-07 | 2013-06-26 | 内蒙古自治区林业科学研究院 | 生物肥岛固沙沙障的构造方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988002419A1 (fr) * | 1986-10-03 | 1988-04-07 | Freed W Wayne | Sol en terre renforce et procede s'y rapportant |
WO1994028248A1 (fr) * | 1993-06-02 | 1994-12-08 | Orgel | Materiaux granuleux pour renforcement de sols et procede d'elaboration |
FR2707093A1 (fr) * | 1993-06-30 | 1995-01-06 | Genser Franck | Surface artificielle notamment adaptée à la réalisation de pistes hippiques ainsi que procédé d'obtention d'une telle surface. |
-
1995
- 1995-12-12 FR FR9515114A patent/FR2742175B1/fr not_active Expired - Fee Related
-
1996
- 1996-12-05 AU AU11006/97A patent/AU1100697A/en not_active Abandoned
- 1996-12-05 EP EP96941705A patent/EP0808390A1/fr not_active Withdrawn
- 1996-12-05 JP JP9521780A patent/JPH11500801A/ja active Pending
- 1996-12-05 CA CA 2212928 patent/CA2212928A1/fr not_active Abandoned
- 1996-12-05 WO PCT/FR1996/001942 patent/WO1997021876A1/fr not_active Application Discontinuation
- 1996-12-05 BR BR9607299A patent/BR9607299A/pt not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988002419A1 (fr) * | 1986-10-03 | 1988-04-07 | Freed W Wayne | Sol en terre renforce et procede s'y rapportant |
WO1994028248A1 (fr) * | 1993-06-02 | 1994-12-08 | Orgel | Materiaux granuleux pour renforcement de sols et procede d'elaboration |
FR2707093A1 (fr) * | 1993-06-30 | 1995-01-06 | Genser Franck | Surface artificielle notamment adaptée à la réalisation de pistes hippiques ainsi que procédé d'obtention d'une telle surface. |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999009114A1 (fr) * | 1997-08-15 | 1999-02-25 | Ppg Industries Ohio, Inc. | Melange de sols renforces par fibres |
US6042305A (en) * | 1997-08-15 | 2000-03-28 | Ppg Industries Ohio, Inc. | Fiber-reinforced soil mixtures |
NL1011066C2 (nl) * | 1999-01-19 | 2000-07-20 | Transportbedrijf Van Vliet B V | Hydraulisch menggranulaat voor toepassing als funderingsmateriaal in de wegenbouw. |
WO2012123507A1 (fr) | 2011-03-14 | 2012-09-20 | Rockwool International A/S | Utilisation de fibres minérales |
EA030164B1 (ru) * | 2011-03-14 | 2018-06-29 | Роквул Интернэшнл А/С | Применение смеси из песка и каменных волокон в качестве покрытия для конной езды |
US10066344B2 (en) | 2011-03-14 | 2018-09-04 | Rockwool International A/S | Method of making an equestrian surface using stone fibers |
Also Published As
Publication number | Publication date |
---|---|
FR2742175B1 (fr) | 1998-01-09 |
EP0808390A1 (fr) | 1997-11-26 |
BR9607299A (pt) | 1997-11-25 |
CA2212928A1 (fr) | 1997-06-19 |
FR2742175A1 (fr) | 1997-06-13 |
JPH11500801A (ja) | 1999-01-19 |
AU1100697A (en) | 1997-07-03 |
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