An anti-corrosive concrete grouting material for coastal structure connection and a method for preparing the same, belonging to the technical field of anti-corrosion of coastal assembled structure connectors. The grouting material includes the following components: expansible compound cement, slag sand, fly ash (FA), polyvinyl alcohol (PVA) (containing an oxidant and a catalyst), graphene oxide (GO), a water reducer, an adjusting admixture, a defoaming agent, a mineral admixture and water. A shrinkage-free effect of the grouting material is realized through internal curing of GO-PVA hydrogel, micro-expansion of the compound cement and shrinkage reduction effect of the FA; an energy storage effect of a GO-PVA hydrogel micro-capacitor is exerted to avoid formation of a reinforcement corrosion micro-battery in a grouting material sleeve, a reinforcement corrosion self-immune effect is achieved, seawater corrosion resistance of the grouting material is improved by the slag sand, and it has huge economic and environmental protection benefits.

A geopolymer composition for use as a cement or concrete is provided, the composition comprising: (a) fly ash (FA); (b) ground granulated blast-furnace slag (GGBS); and (c) high-magnesium nickel slag (HMNS). The composition may optionally comprise a filler. A method for forming a geopolymer composition is also provided, the method comprising: providing a geopolymer precursor comprising: (a) fly ash (FA); (b) ground granulated blast-furnace slag (GGBS); and (c) high-magnesium nickel slag (HMNS); combining components (a) to (c) with an activator, the activator comprising a silicate and a base in solution in a solvent; and allowing the resulting mixture to cure. The geopolymer composition advantageously comprises one or more allotropes of carbon, in particular a carbon nano-structure material, for example nanotubes, nanobuds and nanoribbons. The geopolymer composition finds use in form a wide range of construction components and structures.

A geopolymer composition for use as a cement or concrete is provided, the composition comprising: (a) fly ash (FA); (b) ground granulated blast-furnace slag (GGBS); and (c) high-magnesium nickel slag (HMNS). The composition may optionally comprise a filler. A method for forming a geopolymer composition is also provided, the method comprising: providing a geopolymer precursor comprising: (a) fly ash (FA); (b) ground granulated blast-furnace slag (GGBS); and (c) high-magnesium nickel slag (HMNS); combining components (a) to (c) with an activator, the activator comprising a silicate and a base in solution in a solvent; and allowing the resulting mixture to cure. The geopolymer composition advantageously comprises one or more allotropes of carbon, in particular a carbon nano-structure material, for example nanotubes, nanobuds and nanoribbons. The geopolymer composition finds use in form a wide range of construction components and structures.

A method for recycling a used rotor blade of a wind turbine includes processing the used rotor blade into a plurality of material fragments. The method also includes treating the plurality of material fragments to remove at least a portion of the at least one composite material and expose the at least one fiber material of the used rotor blade. Further, the method includes mixing the treated plurality of material fragments with, at least, an alkali activator to form a usable geopolymer concrete.

A method for recycling a used rotor blade of a wind turbine includes processing the used rotor blade into a plurality of material fragments. The method also includes treating the plurality of material fragments to remove at least a portion of the at least one composite material and expose the at least one fiber material of the used rotor blade. Further, the method includes mixing the treated plurality of material fragments with, at least, an alkali activator to form a usable geopolymer concrete.

A vegetal concrete masonry unit is provided which comprises cooked crop residues, binder and pulverized fuel ash in a mass ratio of 1:1:1.5 to 1:1.5:3.

A method of designing a cement slurry may include: (a) selecting at least a cement and concentration thereof, a water and concentration thereof, and one or more chemical additives and a concentration thereof such that a cement slurry formed from the cement, water, and the one or more chemical additives meet a density requirement; (b) calculating a thickening time of the cement slurry using a thickening time model; (c) comparing the thickening time of the cement slurry to a thickening time requirement, wherein steps (a)-(c) are repeated if the thickening time of the cement slurry does not meet or exceed the thickening time requirement, wherein the step of selecting comprises selecting concentrations and/or different chemical identities for the one or more chemical additives, cement, or water, or step (d) is performed if the thickening time of the cement slurry meets or exceeds the thickening time requirement; and (d) preparing the cement slurry.

A method of designing a cement slurry may include: (a) selecting at least a cement and concentration thereof, a water and concentration thereof, and one or more chemical additives and a concentration thereof such that a cement slurry formed from the cement, water, and the one or more chemical additives meet a density requirement; (b) calculating a thickening time of the cement slurry using a thickening time model; (c) comparing the thickening time of the cement slurry to a thickening time requirement, wherein steps (a)-(c) are repeated if the thickening time of the cement slurry does not meet or exceed the thickening time requirement, wherein the step of selecting comprises selecting concentrations and/or different chemical identities for the one or more chemical additives, cement, or water, or step (d) is performed if the thickening time of the cement slurry meets or exceeds the thickening time requirement; and (d) preparing the cement slurry.

A binder composition for immobilizing a toxic-containing material. This composition has excellent strength developing properties at low temperature and is capable of solidifying soil to suppress the elution of toxic materials from the soil.

A binder composition for immobilizing a toxic-containing material. This composition has excellent strength developing properties at low temperature and is capable of solidifying soil to suppress the elution of toxic materials from the soil.