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1. (WO2019064250) PROCÉDÉ D'ASSEMBLAGE DE DEUX ÉLÉMENTS
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

Claims :

1. Method for joining two elements, such as reinforced concrete elements or steel elements, with each other along a vertical joint, wherein the elements comprise protruding parts that protrude from the elements along the vertical joint, the method comprising:

arranging the elements with face sides facing each other and the elements defining a pocket extending in a vertical direction along the vertical joint, wherein the pocket comprises an opening extending in the vertical direction along the joint and wherein the protruding parts of the elements protrude into the pocket,

pneumatically applying fresh concrete or mortar into the pocket via the opening,

allowing the concrete or mortar to harden.

2. Method according to claim 1, wherein the reinforced concrete elements have rebar embedded therein, wherein the rebar comprises protruding rebar sections that protrude from the concrete elements on face sides thereof,

the method comprising:

arranging the concrete elements with the face sides facing each other, the face sides being configured to define a pocket extending in a vertical direction along the vertical joint, wherein the pocket comprises an opening extending in the vertical direction along the joint and wherein the protruding rebar sections of the concrete elements protrude into the pocket,

pneumatically applying fresh concrete or mortar into the pocket via the opening,

allowing the concrete or mortar to harden.

3. Method according to claim 2, wherein the pocket has a trapezoidal or triangular cross section.

4. Method according to claim 1, 2 or 3, wherein the concrete or mortar is pneumatically applied into the pocket from the bottom to the top, or from the top to the bottom.

5. Method according claim 2, 3 or 4, wherein the

protruding rebar sections protruding into the pocket from opposite sides of the pocket are overlapping each other when seen in a vertical direction.

6. Method according to any one of claims 1 to 5, wherein additional reinforcing elements are placed in the pocket before applying the fresh concrete or mortar.

7. Method according to claim 6, wherein the additional reinforcing elements are arranged to connect with each other the protruding parts, in particular the protruding rebar sections, protruding into the pocket from opposite sides of the pocket.

8. Method according to any one of claims 1 to 7, wherein the fresh concrete is selected so as to obtain a 28d compressive strength of > 70 MPa .

9. Method according to any one of claims 1 to 8, wherein ultra high performance concrete (UHPC) or high performance concrete (HPC) is used as said fresh concrete.

10. Method according to claim 9, wherein an ultra high performance concrete is used, which comprises in relative parts by mass with respect to the cement:

100 parts of cement, the particles of which have a BET specific surface area comprised from 1.20 to 5 m2/g; 32 to 42 parts of water;

5 to 50 parts of a mineral addition Al, the particles of which have a D50 less than or equal to 6 pm and selected from silica fume, metakaolin, slag, pozzolans or mixtures thereof;

90 to 230 parts of sand, the particles of which have a D50 greater than or equal to 50 μπι and a D90 less than or equal to 3 mm;

0.0001 to 10 parts of a superplasticizer, the active material concentration of which is 15% by mass.

11. Method according to claim 9 or 10, wherein an ultra high performance concrete is used, which comprises in relative parts by mass with respect to the cement:

100 parts of cement, the particles of which have a BET specific surface area comprised from 1.20 to 1.7 m2/g; 38 to 42 parts of water;

8 to 20 parts of a mineral addition Al, the particles of which have a D50 less than or equal to 6 μηα and selected from silica fume, metakaolin, slag, pozzolans or mixtures thereof;

90 to 180 parts of sand, the particles of which have a D50 comprised from 100 μπι to 400 μηι and a D90 less than or equal to 800 μπι;

0.0001 to 10 parts of a superplasticizer, the active material concentration of which is 15% by mass.

12. Method according to any one of claims 9 to 11, wherein an ultra high performance concrete is used, which comprises a hydraulic binder comprising in mass per cent:

from 20 to 82% of a Portland cement, the particles of which have a D50 comprised from 2 \xm to 11 μπι;

from 15 to 56% of a non-pozzolanic mineral addition Al, the particles of which have a D50 comprised from 1 to 150 μιη and selected from among limestone additions, siliceous additions, siliceous limestone mineral additions, calcined shales, zeolites, burnt plant ashes, and mixtures thereof;

from 4 to 30% of pozzolanic mineral addition A2, the particles of which have a D50 comprised from 1 to 150 μιη;

a sum of the percentages of the Portland cement, the non-pozzolanic mineral addition Al and the pozzolanic mineral addition A2 being comprised from 90 to 100%.

13. Method according to any one of claims 10 to 12, wherein the concrete compositions further comprise organic and/or metal and/or glass fibers.

14. Method according to any one of claims 1 to 13, wherein the concrete elements or the steel elements are configured as segments of towers, such as concrete and/or steel towers for wind turbines, and the concrete or steel elements are arranged, in particular with their face sides facing each other, so as to form a tower or a tower section having a cylindrical or polygonal cross section.

15. Method according to claim 14, wherein the opening of the pocket is directed to the interior of the tower.

16. Use of a ultra high performance concrete (UHPC) or a high performance concrete (HPC) for joining two elements, such as reinforced concrete elements or steel elements, with each other along a vertical joint, wherein the fresh concrete is pneumatically applied along the joint.

17. Precast concrete elements for use in a method

according to any one of claims 1 to 15, two of said

concrete elements being joinable along a vertical joint, the concrete elements having rebar embedded therein, wherein the rebar comprises protruding rebar sections that protrude from the concrete elements on face sides thereof, wherein the face sides are configured to define a pocket extending in a vertical direction along the vertical joint, wherein the pocket comprises an opening extending in the vertical direction along the joint and wherein the

protruding rebar sections of the concrete elements protrude into the pocket.