Sealing wall building material and method for producing a sealing wall building material

Patent metadata

Field	Value
Publication number	US-11680018-B2
Application number	US-201816607617-A
Country	US
Kind code	B2
Filing date	Apr 20, 2018
Priority date	Apr 26, 2017
Publication date	Jun 20, 2023
Grant date	Jun 20, 2023

Abstract

The invention relates to a sealing wall building material, which has a binding agent with cement and aggregates. It is provided according to the invention that the binding agent comprises a mixture of cement and fly ash, wherein it is free of clay material, and that it has an impermeability with a kf value of 10−7 m/s and less.

First claim

The invention claimed is:

1. A sealing wall element formed of a sealing wall building material which has a binding agent with cement and aggregates,
the sealing wall element comprising sand with an aggregate 0/2 with a weight proportion of 400 to 1,000 kg/m 3 and a coarse grit with an aggregate 2/8 with a weight proportion of 400 to 800 kg/m 3 and wherein a content of binding agent of at least 400 kg/m 3 is provided,
wherein
the binding agent comprises a mixture of cement and fly ash, wherein the binding agent is free of clay material,
the sealing wall building material has an impermeability measured according to DIN 18130-01 with a kf value of 10 −7 m/s or less when the sealing wall building material is cured, and
the binding agent has a ratio of cement to fly ash of between 7% and 60%.

2. A sealing wall element according to claim 1 ,
further comprising:
a binding agent having a content of cement of 100 kg/m 3 and a content of fly ash of 300 to 350 kg/m 3 .

3. A sealing wall element according to claim 1 ,
further comprising:
a flow agent and/or a retarder.

4. A sealing wall element according to claim 1 ,
wherein a fresh mass of the sealing wall building material has a bulk density of between 2.0 g/cm 3 and 2.4 g/cm 3 .

5. A sealing wall element according to claim 1 ,
wherein
a monoaxial compressive strength q u of q u ≥500 kN/m 2 is provided at an age of 7 days and of 1000 kN≤q u ≤5000 kN/m 2 at an age of 28 days.

6. A sealing wall with a sealing wall element according to claim 1 .

7. A method for manufacturing a sealing wall element according to claim 1 ,
wherein binding agent with cement and aggregates with the addition of water are mixed in a single mixer to form the sealing wall building material for the sealing wall element.

Assignees

• Bauer Spezialtiefbau

Inventors

• Ibuk Hursit

Classifications

• C04B2111/00775

  the composition being used as waste barriers or the like, e.g. compositions used for waste disposal purposes only, but not containing the waste itself · CPC title

• B09B2101/30

  Incineration ashes · CPC title

• C04B2111/00293

  Materials impermeable to liquids · CPC title

• B09B1/008

  Subterranean disposal, e.g. in boreholes or subsurface fractures · CPC title

• E02D5/18

  Bulkheads or similar walls made solely of concrete in situ {(moulds therefor E02D5/68; making foundation slots E02D17/13; sealing diaphragms other than those made of concrete E02D19/18)} · CPC title