A composition for producing a glass fiber reinforced cement rebar, the composition comprising glass fiber; and a binder, the binder impregnates the glass fibers to hold the glass fibers together, where the binder comprises a cementitious component and a non-cement component, where the non-cement component comprises graphene oxide.

A method of manufacturing inorganic binder by reduction furnace slag includes a raw material preparation step, a stirring step, a maintaining step and a drying step. The raw material preparation step is to provide a powder mixture containing 30 wt % to 55 wt % of reduction furnace slag, and 45 wt % to 70 wt % of glass powder. The stirring step is to place the powder mixture in a mixing tank, and add an alkali activator to the mixing tank to stir and react to form mixed slurry. The alkali equivalent (AE) of the mixed slurry is 2% to 7%, and the water-binder ratio is 0.25 to 0.4. The maintaining step is to place the mixed slurry in a high-temperature and high pressure maintaining environment for a maintaining time to get a binder. The drying step is to dry the binder.

A method of manufacturing inorganic binder by reduction furnace slag includes a raw material preparation step, a stirring step, a maintaining step and a drying step. The raw material preparation step is to provide a powder mixture containing 30 wt % to 55 wt % of reduction furnace slag, and 45 wt % to 70 wt % of glass powder. The stirring step is to place the powder mixture in a mixing tank, and add an alkali activator to the mixing tank to stir and react to form mixed slurry. The alkali equivalent (AE) of the mixed slurry is 2% to 7%, and the water-binder ratio is 0.25 to 0.4. The maintaining step is to place the mixed slurry in a high-temperature and high pressure maintaining environment for a maintaining time to get a binder. The drying step is to dry the binder.

A method of manufacturing an activated pozzolan composition includes: (i) grinding a natural pozzolan, alone or with another mineral component that is not cement clinker, to form a finely ground pozzolan component having a first d90 in a range of about 10 m to about 45 m and a first d10 less than about 5 m; and (ii) blending, without intergrinding, the finely ground pozzolan component with a coarse particulate mineral component comprised of coarse mineral particles not interground with the fine interground particulate component, the coarse particulate component having a second d90 greater than the first d90 and a second d10 greater than the first d10. The natural pozzolan can be one or more of natural pozzolanic deposits, volcanic ash, metakaolin, shale dust, calcined clay, trass, and pumice.

A method of manufacturing an activated pozzolan composition includes: (i) grinding a natural pozzolan, alone or with another mineral component that is not cement clinker, to form a finely ground pozzolan component having a first d90 in a range of about 10 m to about 45 m and a first d10 less than about 5 m; and (ii) blending, without intergrinding, the finely ground pozzolan component with a coarse particulate mineral component comprised of coarse mineral particles not interground with the fine interground particulate component, the coarse particulate component having a second d90 greater than the first d90 and a second d10 greater than the first d10. The natural pozzolan can be one or more of natural pozzolanic deposits, volcanic ash, metakaolin, shale dust, calcined clay, trass, and pumice.

A blended particulate composition includes: a blended supplementary cementitious material (SCM) formed by intergrinding: an SCM selected from the group consisting of calcined clay, metakaolin, fly ash, bottom ash, shale dust, metallurgical slags, waste glass, and combinations thereof; and a non-lime-bearing material selected from the group consisting of limestone that has not been calcined to form calcium oxide (CaO), fine aggregate, sand, basalt, sinters, ceramics, recycled bricks, recycled concrete, and refractory materials; and at least one of a calcium-based cement or calcium-based set accelerator. The calcium-based cement may include Portland cement and the calcium-based set accelerator may include calcium oxide (CaO), calcium chloride (CaCl.sub.2), calcium nitrite (Ca(NO.sub.2).sub.2, or calcium nitrate (Ca(NO.sub.3).sub.2.

A blended particulate composition includes: a blended supplementary cementitious material (SCM) formed by intergrinding: an SCM selected from the group consisting of calcined clay, metakaolin, fly ash, bottom ash, shale dust, metallurgical slags, waste glass, and combinations thereof; and a non-lime-bearing material selected from the group consisting of limestone that has not been calcined to form calcium oxide (CaO), fine aggregate, sand, basalt, sinters, ceramics, recycled bricks, recycled concrete, and refractory materials; and at least one of a calcium-based cement or calcium-based set accelerator. The calcium-based cement may include Portland cement and the calcium-based set accelerator may include calcium oxide (CaO), calcium chloride (CaCl.sub.2), calcium nitrite (Ca(NO.sub.2).sub.2, or calcium nitrate (Ca(NO.sub.3).sub.2.

The present invention relates to a method of producing a carbonated composite:

a. providing a particulate mineral material, wherein the mineral material comprises metal slag, wherein the metal slag comprises steel slag;

b. providing a modifier, wherein the modifier comprises sodium gluconate;

c. mixing the mineral material and the modifier with water to form a slurry;

d. treating the slurry with carbon dioxide, to form a wet solid residue, wherein the concentration of carbon dioxide is greater than about 10 vol%; and

e. drying the wet solid residue to form the carbonated composite.

The present invention relates to a method of producing a carbonated composite:

a. providing a particulate mineral material, wherein the mineral material comprises metal slag, wherein the metal slag comprises steel slag;

b. providing a modifier, wherein the modifier comprises sodium gluconate;

c. mixing the mineral material and the modifier with water to form a slurry;

d. treating the slurry with carbon dioxide, to form a wet solid residue, wherein the concentration of carbon dioxide is greater than about 10 vol%; and

e. drying the wet solid residue to form the carbonated composite.

A carbonized brick of recycled concrete powders and a preparation method thereof are provided, belonging to the field of concrete materials. The preparation method includes: adding composition A to a liquid storage tank; introducing composition B into the liquid storage tank to react with a solid waste solution to generate calcium bicarbonate solution; filling recycled powders into a molding die, decomposing the calcium bicarbonate solution by heat, reacting generated carbon dioxide with calcium ions leached from a CSH gel in the recycled powders to produce calcium carbonate, and precipitating, crystallizing and cementing in the molding die together with calcium carbonate produced by decomposing calcium bicarbonate solution, and resulting in strength of the recycled powders.