Bricks made from industrial waste with CO2 binding function (R50)

Abstract

Brick with CO2 binding function, consisting of: - a pressure-resistant outer shell, which preferably comprises 50 percent by volume of the total structure and consists of industrial secondary materials such as brick dust, fly ash, dolomite flour or natural trass, - and a central filling, which preferably takes up 50 percent of the total volume and consists of carbonatable, porous material such as brick dust or crushed sand, The outer shell and filling are based on industrial waste and the material system is recyclable.

Description

Technical area:

[0001] Sustainable building materials, CO2 storage, bricks made from industrial secondary raw materials. Short description:

[0002] The R50 brick is made from industrial waste materials. The outer shell preferably comprises 50

[0003] Volume percent of the total structure and is composed of fine-grained, hydraulically and latently hydraulically reactive residual materials such as brick dust, fly ash, trass, or dolomite powder. The filling preferably amounts to 50 volume percent and consists of porous, carbonatable waste materials with CO2 binding potential. The material system is recyclable and, depending on the used CO2 drying - a CO2-negative balance. Technical problem:

[0004] The production of high-quality bricks from recycled materials has so far mostly been based on energy-intensive Processes are limited or lead to materials with limited load-bearing capacity. In addition, a CO2-binding brick made primarily from industrial waste. Solution of the invention:

[0005] The brick according to the invention consists of a load-bearing outer shell made of reactive recycled materials and a filling of carbonatable porous material. It actively binds CO2 and is recyclable – the material system is largely based on industrial waste. Technical description:

[0006] The brick consists of a pressure-resistant outer shell and a CO2-binding filling. The outer shell consists of industrial secondary materials such as finely ground brick dust, fly ash, dolomite flour or natural trass - materials with hydraulic or pozzolanic reaction potential. Components are homogenized with water, shaped and preferably in a CO2-enriched atmosphere dried. The filling consists of carbonatable, porous material such as brick dust or Crushed sands and preferably makes up 50 percent by volume of the total volume. Comparison to the state of the art:

[0007] The brick according to the invention can correspond in its external shape to commercially available bricks e.g. NF, DF or hollow brick formats. The filling can be completely enclosed or at the top and remain open at the bottom - depending on the processing concept. This allows the specialist to make reference to the practical Application is made easier without limiting the protection claims. Note on optional CO2 activation:

[0008] The brick can optionally be manufactured using a CO2-enriched

[0009] This includes, for example, mixing with CO2-enriched water,

[0010] Forming in a CO2 atmosphere or CO2-assisted drying. This process is not subject to present application, but is claimed separately. Figure 1Description: 1 Outer shell: pressed mineral mixture e.g.: brick dust, dolomite, fly ash 2 Filling: optional CO2-active mixture of biochar and mineral additives

[0011] Note: Schematic representation, not to scale

Claims

[1] Brick with CO2 binding function, consisting of: - a pressure-resistant outer shell, which preferably comprises 50 percent by volume of the total structure and consists of industrial secondary materials such as brick dust, fly ash, dolomite flour or natural trass, - and a central filling, which preferably takes up 50 percent of the total volume and consists of carbonatable, porous material such as brick dust or crushed sand, The outer shell and filling are based on industrial waste and the material system is recyclable.

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