A method of making high performance concrete, the method may include adding ground glass powder (GP), nanosilica (nS) powder, cement, silica fume, fly ash, and sand to create a homogenized mixture. The method may also include homogenizing the mixture by mixing and adding water and superplasticizer to the homogenized mixture to obtain a slurry. The method may also include mixing the slurry until a high flowability mixture is obtained. The method may then include adding a first microsteel fiber (T1) to the high flowability mixture; adding a second microsteel fiber (T3) to the high flowability mixture; adding a third microsteel fiber (T4) to the high flowability mixture; and casting the high flowability mixture.

A geo-polymeric concrete and a process for preparing the geo-polymeric concrete is disclosed. The geo-polymeric concrete includes class F fly ash in a range from 10-20 wt %, of the design mix river sand in a range from 25-40 wt % of the design mix, a natural aggregate in a range from 15 to 40 wt % of the design mix, silica fume in a range from 1 to 2 wt % of class F fly ash, an alkaline activator solution and a superplasticizer in a range from 0.5 to 3 wt %. The materials used for preparing the superplasticizer are easily available in the market in abundance at a reasonable cost. The superplasticizer is economically viable and improves the workability of the geo-polymeric concrete. The presence of the superplasticizer does not affect the compressive strength of the geo-polymeric concrete.

A cement composition is provided including a cementitious matrix containing Portland cement and a volcanic pumice component incorporated within the cementitious matrix. The volcanic pumice component is prepared by grinding in a ball mill using tungsten balls. The ball mill uses a tungsten carbide bowl of capacity 250 ml and the 12 tungsten carbide balls each having a diameter of about 20 mm. The volcanic pumice component is prepared in the ball mill at a speed of about 500 rpm for a duration about 10 minutes, about 1 hour, and about 3 hours. The volcanic pumice component is included in an amount of between about 10% w/w and about 30% w/w.

A cement composition is provided including a cementitious matrix containing Portland cement and a volcanic pumice component incorporated within the cementitious matrix. The volcanic pumice component is prepared by grinding in a ball mill using tungsten balls. The ball mill uses a tungsten carbide bowl of capacity 250 ml and the 12 tungsten carbide balls each having a diameter of about 20 mm. The volcanic pumice component is prepared in the ball mill at a speed of about 500 rpm for a duration about 10 minutes, about 1 hour, and about 3 hours. The volcanic pumice component is included in an amount of between about 10% w/w and about 30% w/w.

Embodiments of the present disclosure related carbon-based structural unit (CSU). The CSUs include a cured composition. The cured composition includes about 1% to about 80% pyrolysis char (PC), about 0.1% to about 35% coal deposits, extracts, and residual tar (CDER) materials, and about 0% to about 99% pitch material. The CDER material includes a tetralin insoluble (TI), a deposit (De), a distillation residue (DR), and a residue (Re). A method of making a composition includes extracting a coal extraction residue (CER) from coal; fabricating pyrolysis char (PC) and a coal deposits, extracts, and residual tar (CDER) material from the CER; sieving and milling the PC into milled PC; and mixing the pyrolysis char (PC) and the CDER material to form a composition.

A concrete composition may include Portland cement, aggregates, and mercapto-alcohol and/or cysteine-based monomer derivatives. Such a composition may have improved mechanical properties and durability characteristics compared to conventional concrete compositions. The mercapto-alcohol and/or cysteine-based monomer derivative may be in a range of from 0.1 to 5.0 wt. %, based on total dry concrete composition weight

A cement composition utilizing powdered elemental sulfur may comprise a cementitious material; the powdered elemental sulfur, wherein the powdered elemental sulfur has an average particle size of less than or equal to 45 microns; at least one of a coarse aggregate or a fine aggregate; and an aqueous solution. A method of making a cement composition utilizing powdered elemental sulfur may comprise: mixing a cementitious material with the powdered elemental sulfur at less than 127 C. to form a dry mixture, the powdered elemental sulfur having an average particle size of less than or equal to 45 microns; combining the dry mixture with an aqueous solution at a temperature of less than 127 C. to form a wet mixture; and mixing at least one of a course aggregate or a fine aggregate with the dry mixture or the wet mixture at a temperature of less than 127 C.

The present invention relates to the use of grinding aids comprising Aluminum sulfate, Alum, and/or Na salt, K salt, or Li salt of a hydroxycarboxylic acid, wherein the hydroxycarboxylic acid comprises citric, lactic, glycolic, tartaric, acetic, or malic acid, for producing Ground Activated Cementitious Precursor Material (GACPM) by co-grinding with granulated slag, such as a steel industry waste, Granulated Blast Furnace Slag (GBFS), and the products provided therefrom. The use of the one or more grinding aids reduces the grinding time by about 10-33%, improves particle fineness by about 10-33%, and/or reduces carbon emissions (CO.sub.2) associated with such processes by about 10-33%, thereby significantly enhancing efficiency. Additionally, it improves particle morphology and activates amorphous glass particles in the GACPM (compared to conventional Ground Granulated Blast Furnace Slag (GGBFS), increasing their reactivity with alkali activators in geopolymer cements or with calcium hydroxide when used with Portland cement applications. This activation, due to use of GACPM instead of GGBFS, leads to compressive strength gains of about 5-33% in activated geopolymer cement mortar/grout/concrete and about 5-33% in Portland GACPM cement blends, all while significantly reducing energy usage, costs, and carbon emissions.

A concrete-based composite material including iron rich particles is characterized by an iron content greater than 17% by weight of the composite material, can include iron particles which are an iron by-product recovered from iron slag material, can include iron rich particles which have an iron content of at least 60% by weight of the iron rich particles, and/or can include iron particles having a particle size distribution in the range of about inch to +60 mesh or in the range of about 20 mesh to about +60 mesh. The composite material can include ground granulated blast furnace slag as a portion of the cementitious component of the composite material. A method of forming a structural element from the composite material includes casting the structural element such that the structural element is characterized by a ballistic performance of Level 10 as defined by Underwriters Laboratories standard UL752.

A precast concrete beam is provided in construction of a long span bridge structure. The beam is formed of a plurality of aligned modular elements each formed of prestressed UHPC mix as a unitary body. The UHPC mix includes discontinuous fibers distributed randomly throughout a concrete matrix. Each modular element is aligned modular and connected by an epoxy grout to adhering adjacent element joints. Finally, post-tensioning of the entire beam reinforces and affixes the plurality of aligned modular elements into a single long span beam.