WO2017013482A1 - Floor slab of earth - Google Patents

Floor slab of earth Download PDF

Info

Publication number
WO2017013482A1
WO2017013482A1 PCT/IB2016/001022 IB2016001022W WO2017013482A1 WO 2017013482 A1 WO2017013482 A1 WO 2017013482A1 IB 2016001022 W IB2016001022 W IB 2016001022W WO 2017013482 A1 WO2017013482 A1 WO 2017013482A1
Authority
WO
WIPO (PCT)
Prior art keywords
earth
mixture
cement
mass
floor slab
Prior art date
Application number
PCT/IB2016/001022
Other languages
French (fr)
Inventor
Pascal JAY
Fabrice GAGEY
Ivan SERCLERAT
Original Assignee
Lafarge
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 Lafarge filed Critical Lafarge
Publication of WO2017013482A1 publication Critical patent/WO2017013482A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/008—Producing shaped prefabricated articles from the material made from two or more materials having different characteristics or properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/04—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B28B3/10—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form each charge of material being compressed against previously formed body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/01—Flat foundations
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/08—Flooring or floor layers composed of a number of similar elements only of stone or stone-like material, e.g. ceramics, concrete; of glass or with a top layer of stone or stone-like material, e.g. ceramics, concrete or glass
    • E04F15/082—Flooring or floor layers composed of a number of similar elements only of stone or stone-like material, e.g. ceramics, concrete; of glass or with a top layer of stone or stone-like material, e.g. ceramics, concrete or glass with a top layer of stone or stone-like material, e.g. ceramics, concrete or glass in combination with a lower layer of other material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/406—Bright, glossy, shiny surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/536—Hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/554—Wear resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof
    • B32B2419/04—Tiles for floors or walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2471/00—Floor coverings
    • 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
    • C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
    • 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
    • C04B2111/60—Flooring materials

Definitions

  • the present invention relates to the technical field of construction and has more particularly as its object a floor slab of earth and also a method for the production of a floor slab of earth.
  • Earth is still used in certain locations of the world as a construction material for dwellings.
  • These slabs are low-priced and permit self-construction .
  • the slabs resulting from this method also present a limited surface impermeability.
  • the present invention aims to solve all or part of these above-mentioned disadvantages.
  • the present invention relates to a floor slab of earth for the construction of a floor of a building including :
  • first layer comprising a first mixture of earth and cement, said first mixture having a first proportion by mass of cement in relation to the mass of the first mixture
  • a second layer intended to form a superficial face of the floor slab of earth, said second layer comprising a second mixture of damp earth and of cement presenting a second proportion by mass of cement in relation to the mass of the second mixture greater than the first proportion by mass of cement of the first mix ⁇ ture .
  • a patch can be sponged and cleaned with a cloth which remains clear.
  • a staining liquid such as coffee, does not leave any trace if it is cleaned within five to ten minutes.
  • the surface of the floor slab of earth according to the invention is more resistant to abrasion than a slab of the prior art, whereby the floor slab of earth according to the invention does not produce dust if it is rubbed dry by a cloth or by hand.
  • the first proportion by mass of cement is between 2 and 5%.
  • the second proportion by mass of cement is 1 to 5% greater than the first proportion by mass of cement.
  • the first layer has a thickness of 8 cm to 12 cm.
  • the second layer has a maximum thickness less than or equal to 5 cm, and preferably less than or equal to 2.5 cm.
  • the present invention also has as an object a method in ⁇ cluding the following steps:
  • the earth of the first mixture is sieved to a maximum of 50 mm.
  • the earth of the second mixture is sieved to a maximum of 5 mm.
  • the method includes the subsequent steps consisting of:
  • the method is intended for the production of a floor slab of earth as previously presented.
  • the floor slab of earth is cured under a waterproofing tar- paulin or in a closed environment.
  • Figure 1 is a schematic cross-sectional view of a floor slab of earth according to the invention, disposed on its base.
  • Figure 2 represents the different steps of a production method of a floor slab of earth according to a preferred embodiment of the invention.
  • a floor slab of earth 1 for the construction of a floor of a building according to the invention includes a first layer Ll and a second layer L2 of materials .
  • the first layer Ll is different from the second layer L2.
  • the first layer LI has a thickness of from 8 cm to 12 cm and comprises a first mixture Ml of earth E and of cement C.
  • This first mixture Ml presents a first proportion by mass Tl of cement C in relation to the mass of the first mixture Ml .
  • This first proportion by mass Tl of cement C in the first mixture Ml is between 2 and 5%.
  • the first layer LI is substantially flat.
  • the second layer L2 presents a maximum thickness less than or equal to 5 cm and comprises a second mixture M2 of earth E and of cement C.
  • This second mixture M2 presents a second proportion by mass T2 of cement C in relation to the mass of the second mix- ture M2.
  • This second proportion by mass T2 of cement C in the second mixture M2 is 1 to 5% greater than the first proportion by mass Tl of cement C in the first mixture Ml.
  • the second layer L2 can also comprise a waterproofing agent .
  • This second layer L2 is intended to form a superficial face F of the floor slab of earth 1.
  • This superficial face F is substantially flat and smooth.
  • the present invention also relates to a method for produc ⁇ tion of a floor slab of earth 1, in particular of a floor slab of earth 1 as previously described. As illustrated in Figure 2, in a preferred embodiment of the method, several well-defined steps are included.
  • a base A should be arranged, for example a hardcore layer to give the floor slab of earth 1 a stable support and to prevent rises of moisture .
  • a defined mass of a first mixture Ml of damp earth E and of cement C is used so as to form a first layer LI of materials for the floor slab of earth 1.
  • This first mixture Ml presents a first proportion by mass Tl of cement C in relation to the mass of the first mixture Ml, in particular of 2 to 5%.
  • the earth used in this first mixture Ml is sieved to a maximum of 50 mm.
  • the first layer Ll is compacted so as to flatten without necessarily smoothing it.
  • a fourth step (iv) the visible surface S of the first layer Ll is covered by a second layer L2 comprising a second mixture M2 of damp earth E and of cement C.
  • This second mixture M2 presents a second proportion by mass T2 of cement C in relation to the mass of the second mix ⁇ ture M2.
  • This second proportion by mass T2 of cement C is greater than the first proportion by mass Tl of cement of the first mixture Ml, in particular of 1 to 5% more.
  • the earth E used in this second mixture M2 is sieved to a maximum of 5 mm.
  • This second layer L2 is intended to form the superficial face F of the floor slab of earth 1. In the course of a fifth step (v) , this second layer L2 is compacted to flatten it.
  • the method of production of the floor slab of earth 1 further includes subsequent treatment steps of the superficial face F consisting firstly of wetting a portion of this superficial face F of the floor slab of earth 1 with a defined quantity of water.
  • This wetting step must be carried out on the second layer L2, which is still fresh, preferably just after the compaction .
  • the treated portion is substantially equal to 1 m 2 so as to limit the effects of the evaporation of water.
  • This treated portion is then worked, for example with the aid of a float of hard plastic, until a muddy and homogeneous surface is obtained.
  • a muddy and homogeneous surface is obtained.
  • This treated portion of the superficial face F is then smoothed, for example with the aid of a stainless steel trowel, until this treated portion is closed, smooth and glossy .
  • the preceding steps are then repeated on another portion of the superficial face F of the floor slab of earth 1 until the superficial face F is completely treated.
  • the floor slab of earth 1 is cured in the first days in a closed and tepid environment so as to maintain a maximum rate of humidity, permitting the appearance of cracks to be limited, for example by covering the floor with a plastic tarpaulin or, failing that, by closing the doors and the windows.
  • the humidity of the mixture used for producing the layers of earth LI and L2 is sufficient to hydrate the cement used in the first layer LI and in the second layer L2.
  • the cement thus hydrated and hardened gives the material its water-resistant properties.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Manufacturing & Machinery (AREA)
  • Civil Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Laminated Bodies (AREA)
  • Floor Finish (AREA)

Abstract

The object of the present invention is a floor slab of earth (1) for the construction of a floor of a building including a first layer (L1) comprising a first mixture (M1) of earth (E) and of cement (C), said first mixture (M1) presenting a first proportion by mass (T1) of cement (C) in relation to the mass of the first mixture (M1), a second layer (L2) intended to form a superficial face (F) of the floor slab of earth (1), said second layer (L2) comprising a second mixture (M2) of damp earth (E) and of cement (C) presenting a second proportion by mass (T2) of cement (C) in relation to the mass of the second mixture (M2) greater than the first proportion by mass (T1) of cement (C) of the first mixture (M1). Also a method for the production of such a floor slab of earth (1) is included.

Description

Floor slab of earth
The present invention relates to the technical field of construction and has more particularly as its object a floor slab of earth and also a method for the production of a floor slab of earth.
Earth is still used in certain locations of the world as a construction material for dwellings.
It is known to implement a method consisting of compacting a mixture of damp earth to form a floor slab of earth.
These slabs are low-priced and permit self-construction .
However, these floor slabs of earth exhibit a limited durability due to their inability to prevent the absorption of water by the earth, which then transforms into mud. This leads to a poor quality of the interior floors of the dwellings, which suffer great damage in the case of a rise of water by capillary action or in the case of flood, which can render the dwelling unsanitary. In addition, the cleaning of the floors by means of aqueous solutions is diffi- cult to carry out.
It is known to implement a method consisting of mixing damp earth and cement to reinforce the durability with respect to water of the floor slabs of earth.
However, the slabs resulting from this method also present a limited surface impermeability. The present invention aims to solve all or part of these above-mentioned disadvantages.
To this end, the present invention relates to a floor slab of earth for the construction of a floor of a building including :
- a first layer comprising a first mixture of earth and cement, said first mixture having a first proportion by mass of cement in relation to the mass of the first mixture,
- a second layer intended to form a superficial face of the floor slab of earth, said second layer comprising a second mixture of damp earth and of cement presenting a second proportion by mass of cement in relation to the mass of the second mixture greater than the first proportion by mass of cement of the first mix¬ ture .
This arrangement allows the hardness of the slab to be in- creased significantly, which makes it more resistant to shocks and allows rises by capillary action to be greatly slowed down and any biological invasion such as moulds, plants, rodents and insects to be eliminated. Moreover, the sealing of the surface is greatly increased. A water absorption test on an area of 8 cm x 4 cm has al¬ lowed to note that the water is not totally absorbed after nearly one hour. In addition, a patch of impregnated water dries without forming a ring.
Furthermore, a patch can be sponged and cleaned with a cloth which remains clear. Thus, a staining liquid, such as coffee, does not leave any trace if it is cleaned within five to ten minutes. Finally, the surface of the floor slab of earth according to the invention is more resistant to abrasion than a slab of the prior art, whereby the floor slab of earth according to the invention does not produce dust if it is rubbed dry by a cloth or by hand.
According to a preferred embodiment of the invention, the first proportion by mass of cement is between 2 and 5%.
According to another preferred embodiment of the invention, the second proportion by mass of cement is 1 to 5% greater than the first proportion by mass of cement.
According to another preferred embodiment of the invention, the first layer has a thickness of 8 cm to 12 cm.
According to another preferred embodiment of the invention, the second layer has a maximum thickness less than or equal to 5 cm, and preferably less than or equal to 2.5 cm. The present invention also has as an object a method in¬ cluding the following steps:
(i) providing a base,
(ii) forming on the base a first layer comprising a first mixture of damp earth and of cement, said first mixture having a first proportion by mass of cement in relation to the mass of the first mix¬ ture,
(iii) compacting the first layer so as to make it sub¬ stantially flat, (iv) covering a visible surface of the first layer with a second layer comprising a second mixture of damp earth and of cement, said second layer being in¬ tended to form a superficial face of the floor slab of earth, and the second mixture having a second proportion by mass of cement in relation to the mass of the second mixture being greater than the first proportion by mass of cement of the first mixture ,
(v) compacting the second layer.
This arrangement permits a simple implementation of the method, thus facilitating self-construction. According to a preferred embodiment of the method, the earth of the first mixture is sieved to a maximum of 50 mm.
According to another preferred embodiment of the method, the earth of the second mixture is sieved to a maximum of 5 mm.
According to another preferred embodiment of the method, the method includes the subsequent steps consisting of:
- wetting a portion of the superficial face of the floor slab of earth with a quantity of water comprised between 0.5 and 2 litres, this portion being substantially equal to 1 m2,
- floating the wetted portion of the superficial face,
- smoothing the wetted portion of the superficial face, for example by means of a trowel, until this wetted portion is closed, smooth and glossy,
- if applicable, repeating the preceding steps on an¬ other portion of the superficial face of the floor slab of earth up to the complete treatment of the superficial face.
According to another preferred of the method, the method is intended for the production of a floor slab of earth as previously presented.
According to another preferred embodiment of the method, the floor slab of earth is cured under a waterproofing tar- paulin or in a closed environment.
In any case, the invention will be well understood with the aid of the following description, with reference to the attached diagrammatic drawings representing, by way of non- restrictive example, an example of a floor slab of earth according to the invention.
Figure 1 is a schematic cross-sectional view of a floor slab of earth according to the invention, disposed on its base.
Figure 2 represents the different steps of a production method of a floor slab of earth according to a preferred embodiment of the invention.
As illustrated in Figure 1, a floor slab of earth 1 for the construction of a floor of a building according to the invention includes a first layer Ll and a second layer L2 of materials .
The first layer Ll is different from the second layer L2. The first layer LI has a thickness of from 8 cm to 12 cm and comprises a first mixture Ml of earth E and of cement C. This first mixture Ml presents a first proportion by mass Tl of cement C in relation to the mass of the first mixture Ml .
This first proportion by mass Tl of cement C in the first mixture Ml is between 2 and 5%.
The first layer LI is substantially flat.
The second layer L2 presents a maximum thickness less than or equal to 5 cm and comprises a second mixture M2 of earth E and of cement C.
This second mixture M2 presents a second proportion by mass T2 of cement C in relation to the mass of the second mix- ture M2.
This second proportion by mass T2 of cement C in the second mixture M2 is 1 to 5% greater than the first proportion by mass Tl of cement C in the first mixture Ml.
The second layer L2 can also comprise a waterproofing agent .
This second layer L2 is intended to form a superficial face F of the floor slab of earth 1.
This superficial face F is substantially flat and smooth. The present invention also relates to a method for produc¬ tion of a floor slab of earth 1, in particular of a floor slab of earth 1 as previously described. As illustrated in Figure 2, in a preferred embodiment of the method, several well-defined steps are included.
In the course of a first step (i), a base A should be arranged, for example a hardcore layer to give the floor slab of earth 1 a stable support and to prevent rises of moisture .
In the course of a second step (ii) a defined mass of a first mixture Ml of damp earth E and of cement C is used so as to form a first layer LI of materials for the floor slab of earth 1.
This first mixture Ml presents a first proportion by mass Tl of cement C in relation to the mass of the first mixture Ml, in particular of 2 to 5%.
The earth used in this first mixture Ml is sieved to a maximum of 50 mm. In the course of a third step (iii), the first layer Ll is compacted so as to flatten without necessarily smoothing it.
In the course of a fourth step (iv), the visible surface S of the first layer Ll is covered by a second layer L2 comprising a second mixture M2 of damp earth E and of cement C. This second mixture M2 presents a second proportion by mass T2 of cement C in relation to the mass of the second mix¬ ture M2. This second proportion by mass T2 of cement C is greater than the first proportion by mass Tl of cement of the first mixture Ml, in particular of 1 to 5% more.
The earth E used in this second mixture M2 is sieved to a maximum of 5 mm.
This second layer L2 is intended to form the superficial face F of the floor slab of earth 1. In the course of a fifth step (v) , this second layer L2 is compacted to flatten it.
The method of production of the floor slab of earth 1 further includes subsequent treatment steps of the superficial face F consisting firstly of wetting a portion of this superficial face F of the floor slab of earth 1 with a defined quantity of water.
This wetting step must be carried out on the second layer L2, which is still fresh, preferably just after the compaction .
The treated portion is substantially equal to 1 m2 so as to limit the effects of the evaporation of water.
This treated portion is then worked, for example with the aid of a float of hard plastic, until a muddy and homogeneous surface is obtained. Thus, the flatness of the treated portion of the superfi¬ cial face F is improved.
This treated portion of the superficial face F is then smoothed, for example with the aid of a stainless steel trowel, until this treated portion is closed, smooth and glossy .
The sealing of this portion of the superficial face F is thus improved considerably.
If applicable, the preceding steps are then repeated on another portion of the superficial face F of the floor slab of earth 1 until the superficial face F is completely treated.
In the course of a final step, the floor slab of earth 1 is cured in the first days in a closed and tepid environment so as to maintain a maximum rate of humidity, permitting the appearance of cracks to be limited, for example by covering the floor with a plastic tarpaulin or, failing that, by closing the doors and the windows.
The humidity of the mixture used for producing the layers of earth LI and L2 is sufficient to hydrate the cement used in the first layer LI and in the second layer L2.
The cement thus hydrated and hardened gives the material its water-resistant properties.
Although the invention has been described in connection with particular embodiments, it is readily evident that it is in now way limited thereto and that it includes all the technical equivalents of the means described and also combinations thereof .

Claims

Claims :
1. A floor slab of earth (1) for the construction of a floor of a building including:
- a first layer (LI) comprising a first mixture (Ml) of earth (E) and of cement (C) , said first mixture (Ml) presenting a first proportion by mass (Tl) of cement (C) in relation to the mass of the first mixture (Ml),
- a second layer (L2) intended to form a superficial face (F) of the floor slab of earth (1), said second layer (L2) comprising a second mixture (M2) of damp earth (E) and of cement (C) presenting a second pro- portion by mass (T2) of cement (C) in relation to the mass of the second mixture (M2) greater than the first proportion by mass (Tl) of cement (C) of the first mixture (Ml ) .
2. The floor slab of earth (1) according to claim 1, in which the first proportion by mass (Tl) of cement (C) is comprised between 2 and 5%.
3. The floor slab of earth (1) according to claim 1 or 2, in which the second proportion by mass (T2) of cement
(C) is 1 to 5% greater than the first proportion by mass (Tl) of cement (C) .
4. The floor slab of earth (1) according to any one of claims 1 to 3, in which the first layer (Ll) exhibits a thickness of 8 cm to 12 cm.
5. The floor slab of earth (1) according to any one of claims 1 to 4, in which the second layer (L2) exhibits a maximum thickness less than or equal to 5 cm, and preferably less than or equal to 2.5 cm.
6. A method for producing a floor slab of earth (1) in- eluding the following steps:
(i) providing a base (A) ,
(ii) forming on the base (A) a first layer (LI) comprising a first mixture (Ml) of damp earth (E) and of cement (C) , said first mixture (Ml) exhibiting a first proportion by mass (Tl) of cement (C) in relation to the mass of the first mixture (Ml) ,
(iii) compacting the first layer (LI) so as to make it substantially flat,
(iv) covering a visible surface (S) of the first layer (LI) with a second layer (L2) comprising a second mixture (M2) of damp earth (E) and of cement (C) , said second layer (L2) being intended to form a superficial face (F) of the floor slab of earth (1), and the second mixture (M2) having a second proportion by mass (T2) of cement (C) in relation to the mass of the second mixture (M2) greater than the first proportion by mass (Tl) of cement (C) of the first mixture (Ml),
(v) compacting the second layer (L2) .
7. The method according to claim 6, in which the earth of the first mixture (Ml) is sieved to a maximum of 50 mm.
8. The method according to claim 6 or 7, in which the earth of the second mixture (M2) is sieved to a maximum of 5 mm.
9. The method according to any one of claims 6 to 8, including the subsequent steps consisting of: - wetting a portion of the superficial face (F) of the floor slab of earth (1) with a quantity of water between 0.5 and 2 litres,, this portion being substantially equal to 1 m2,
- floating the wetted portion of the superficial face
(F) ,
- smoothing the wetted portion of the superficial face (F), for example by means of a trowel, until this wetted portion is closed, smooth and glossy,
- if applicable, repeating the preceding steps on another portion of the superficial face (F) of the floor slab of earth (1) until the superficial face (F) is completely treated.
10. The method according to any one of claims 6 to 9, for the production of a floor slab of earth (1) according to any one of claims 1 to 5.
11. The method according to any one of claims 6 to 10, in which the floor slab of earth (1) is cured under a waterproofing tarpaulin or in a closed environment.
PCT/IB2016/001022 2015-07-21 2016-07-21 Floor slab of earth WO2017013482A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1556891A FR3039181B1 (en) 2015-07-21 2015-07-21 EARTH SLAB
FR1556891 2015-07-21

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WO2017013482A1 true WO2017013482A1 (en) 2017-01-26

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2337728A1 (en) * 1973-07-25 1975-02-06 Kurt Glass Chem Fabrik Composite concrete plates - have synthetic resin contg. facing layer on light wt. concrete backing
FR2498516A1 (en) * 1981-01-26 1982-07-30 Speranza Vitino Coloured concrete slab prodn. - have first layer of hydraulic cement contg. synthetic resin and gravel and coloured top layer of hydraulic cement contg. synthetic resin
EP1108825A2 (en) * 1999-11-11 2001-06-20 Gernot Götzinger Method for manufacturing a building panel
KR101163527B1 (en) * 2012-01-13 2012-07-06 (주)아리산업 Manufacturing method for panel and floor with main material of natural soils
US20140272284A1 (en) * 2013-03-15 2014-09-18 David M. Franke Multi zone cementitious product and method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2337728A1 (en) * 1973-07-25 1975-02-06 Kurt Glass Chem Fabrik Composite concrete plates - have synthetic resin contg. facing layer on light wt. concrete backing
FR2498516A1 (en) * 1981-01-26 1982-07-30 Speranza Vitino Coloured concrete slab prodn. - have first layer of hydraulic cement contg. synthetic resin and gravel and coloured top layer of hydraulic cement contg. synthetic resin
EP1108825A2 (en) * 1999-11-11 2001-06-20 Gernot Götzinger Method for manufacturing a building panel
KR101163527B1 (en) * 2012-01-13 2012-07-06 (주)아리산업 Manufacturing method for panel and floor with main material of natural soils
US20140272284A1 (en) * 2013-03-15 2014-09-18 David M. Franke Multi zone cementitious product and method

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FR3039181A1 (en) 2017-01-27

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