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

Patent metadata

Field	Value
Publication number	US-2020095165-A1
Application number	US-201816607617-A
Country	US
Kind code	A1
Filing date	Apr 20, 2018
Priority date	Apr 26, 2017
Publication date	Mar 26, 2020
Grant date	—

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

1 . Sealing wall building material, which has a binding agent with cement and aggregates,
wherein the binding agent comprises a mixture of cement and fly ash, wherein it is free of clay material, the cured sealing wall building material has an impermeability with a kf value of 10 −7 m/s and less and the binding agent has a ratio of cement to fly ash of between 7% and 60%.

2 . Sealing wall building material according to claim 1 ,
wherein the aggregate comprises sand and/or coarse aggregate.

3 . Sealing wall building material according to claim 1 ,
wherein a content of binding agent of at least 400 kg/m 3 concrete is provided.

4 . Sealing wall building material according to claim 1 ,
wherein a binding agent with a content of 100 kg/m 3 and of fly ash of 300 to 350 kg/m 3 is provided.

5 . Sealing wall building material according to claim 1 ,
wherein at least one additive, in particular a flow agent and/or a retarder, is provided.

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

7 . Sealing wall building material 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.

8 . Sealing wall or sealing wall element, which is manufactured using a sealing wall building material according to claim 1 .

9 . Method for manufacturing a sealing wall building material according to claim 1 , in which a binding agent is mixed with cement and aggregates in a single mixer with the addition of water to form the sealing wall building material, wherein the binding agent comprises a mixture of cement and fly ash and the sealing wall building material is kept free of a clay material, and
wherein an impermeability with a kf value of 10 −7 m/s and less is set and the binding agent has a ratio of cement to fly ash of between 7% and 60%.

Assignees

• Bauer Spezialtiefbau

Inventors

• Ibuk Hursit

Classifications

• B09B1/008

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

• B09B1/004

  Covering of dumping sites · CPC title

• C04B28/021 Primary

  Ash cements, e.g. fly ash cements (fly ash as filler C04B18/08); Cements based on incineration residues, e.g. alkali-activated slags from waste incineration (alkali-activated combustion residues as such C04B7/243; mixtures of the lime-pozzuolane type C04B28/18); Kiln dust cements · CPC title

• C04B2111/00293

  Materials impermeable to liquids · 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