Disclosed herein are a fly ash-based foam geopolymer, a preparation method therefor, and the use thereof. The fly ash-based foam geopolymer is prepared from raw materials comprising the following components in parts by weight: 900-1000 parts of a fly ash-based material; 600-700 parts of a composite alkali solution; 0-10 parts of a thickening agent; 2-6 parts of a foam stabilizer A; 5-10 parts of a water reducer; and 20-40 parts of a foaming agent. The preparation method of the present application is simple, and processes such as ball milling, water washing and calcining do not need to be carried out on the raw materials, such that the investment in a grinding equipment, a water washing equipment, a sewage treatment equipment, and a calcining equipment is reduced, and the energy consumption and carbon emissions are reduced. The fly ash-based foam geopolymer prepared by using the fly ash-based material as the main raw material in the present application has a low apparent density and a high early strength, and can be used in the field of fabricated buildings.

A hybrid magnesium cement composition formed from an A-side component and a B-side component. The A-side component includes an A1-component including a light-burn grade magnesium-containing material, and an A2-component including a non-metallic oxide salt. A B-side component having a metal silicate polymer is included.

A hybrid magnesium cement composition formed from an A-side component and a B-side component. The A-side component includes an A1-component including a light-burn grade magnesium-containing material, and an A2-component including a non-metallic oxide salt. A B-side component having a metal silicate polymer is included.

The invention is directed to a fly ash containing construction material having improved strength and water resistance. The fly ash containing material includes fly ash, an alkali solution comprising sodium hydroxide, and water. The invention further provides a geopolymerization method of forming a fly ash containing material.

The invention is directed to a fly ash containing construction material having improved strength and water resistance. The fly ash containing material includes fly ash, an alkali solution comprising sodium hydroxide, and water. The invention further provides a geopolymerization method of forming a fly ash containing material.

The invention relates to a concrete element comprising a core concrete layer and a face concrete layer, wherein the concrete element is obtained by compressing and curing a core concrete layer mixture in contact with a face concrete layer mixture, wherein the core concrete layer mixture contains a latent hydraulic core binder and/or a pozzolanic core binder, water, a granular core material and an alkaline core curing agent, wherein the face concrete layer mixture contains a latent hydraulic face binder and/or a pozzolanic face binder, water, a granular face material and an alkaline face curing agent, and wherein the concrete element has a compressive strength in accordance with DIN EN 12390-3, in particular DIN EN 12390-3:2019-10, measured after 28 days, of less than 120 N/mm.sup.2. The invention also relates to a method for producing the concrete element.

The present invention relates to a process for preparing a particle-stabilized inorganic foam based on geopolymers, to a particle-stabilized inorganic foam based on geopolymers, to a cellular material obtainable by hardening and optionally drying the particle-stabilized inorganic foam based on geopolymers, and to a composition for preparing an inorganic foam formulation for providing a particle-stabilized rinorganic foam based on geopolymes.

An alkaline-activated binder system for fire concretes includes at least one mineral binder and a mineral activator which, in a mixture with water, form a curing geopolymer, where a combination of at least two magnesium components (Mg components) which give an alkaline reaction with water and react with the binder at different times to form a geopolymer is present as activator, where the magnesium components have a different reactivity in respect of atmospheric moisture and/or in respect of the binder. A dry fire concrete mix contains the binder system and the mix may be used in, for example, facilities in the steel industry.

The invention concerns a compressed concrete block comprising a raw clay matrix, a calcined metal oxide composition and aggregates, said compressed concrete block having a basis weight less than or equal to 600 kg/m.sup.2.

The invention further proposes a preparation method (100) for a compressed concrete block having a basis weight less than or equal to 600 kg/m.sup.2, said method comprising the following steps: mixing (110) a raw clay matrix, a calcined metal oxide composition, aggregates and water; placing (120) the resulting mixture in molds; applying (140) pressure to one surface of the molded mixture, preferably the top surface; removing (160) the compressed concrete blocks from the molds, so as to obtain a compressed concrete block with a basis weight less than or equal to 600 kg/m.sup.2.

The invention concerns a compressed concrete block comprising a raw clay matrix, a calcined metal oxide composition and aggregates, said compressed concrete block having a basis weight less than or equal to 600 kg/m.sup.2.

The invention further proposes a preparation method (100) for a compressed concrete block having a basis weight less than or equal to 600 kg/m.sup.2, said method comprising the following steps: mixing (110) a raw clay matrix, a calcined metal oxide composition, aggregates and water; placing (120) the resulting mixture in molds; applying (140) pressure to one surface of the molded mixture, preferably the top surface; removing (160) the compressed concrete blocks from the molds, so as to obtain a compressed concrete block with a basis weight less than or equal to 600 kg/m.sup.2.