The invention comprises a method of making a hydraulic cement clinker. The method comprises delivering a natural calcium-iron-aluminosilicate mineral from one or more of hyaloclastite, lava, scoria, volcanic glass, volcanic ash, or any other mineral of a basaltic or intermediate basaltic chemical composition and blending it in ground form with limestone, calcium oxide or calcium hydroxide. The blended mixture is calcined in a portland cement clinker kiln at an elevated temperature and for a time sufficient to form a hydraulic cement clinker.

The present disclosure is related to a family of metals chelates for use as a hydrogen sulfide scavenger in asphalt, and the preparation thereof. The metal chelates, in particular amino acid metal chelates, are particularly efficient at reducing the hydrogen sulfide emissions of asphalt.

Methods, systems and compositions for storing carbon dioxide in soil are disclosed herein. In some embodiments, the composition comprises at least 35% of cement by weight of the composition; 1-15% of lime by weight of the composition; at least 5% of a supplementary cementitious material (SCM) by weight of the composition; and carbon dioxide, wherein a weight by composition of the carbon dioxide is less than 5%. The composition can further comprise at least 35% of calcium carbonate by weight of the composition.

Methods of producing a building material are provided. Methods of interest include preparing a carbonate precipitate comprising an undifferentiated pluripotent polymorph precursor (i.e., a polymorph precursor) and processing the carbonate precipitate under conditions sufficient to produce the building material. The disclosed polymorph precursors exist in an intermediate state between an disordered state (e.g., amorphous calcium carbonate (ACC)) and an ordered state (e.g., a polymorph of calcium carbonate or of calcium magnesium carbonate). Aspects of the invention also include building materials (e.g., aggregates) as well as compositions (e.g., concrete dry composites, settable compositions and built structures) that include building materials produced via the subject methods.

Disclosed are a hydraulic binder composition containing at least 50% by weight of ground granulated blast furnace slag and a system for activating the slag, the system containing at least calcium sulphate, at least one product chosen from a source of Portland clinker and lime, at least one aluminum derivative and at least one alkali metal or alkaline earth metal salt; containing a ready-to-mix building material composition comprising such a hydraulic binder and aggregates of inert material capable of being agglomerated in the presence of an aqueous phase; and a process for employing the ready-to-mix composition containing a stage of mixing the said composition with water for the purpose of the preparation of a building material, such as a concrete or mortar, and in particular an adhesive mortar, pointing mortar or levelling mortar or coating.

A recirculated-suspension pre-calciner system is disclosed, comprising: a vortex cyclone dust collecting equipment including a plurality of devices, wherein a top device of the vortex cyclone dust collecting equipment is used as a feed system; a vertical combustion kiln; a blower; and a powder purge system, wherein powders in the feed system fall into the vortex cyclone dust collecting equipment and pass through a plurality of the devices to mix and exchange heat with flue gas comprising CO.sub.2, generating calcination reaction and releasing CO2 into the flue gas. and the steam is separated and transported to the feed system by the blower and acts as a carrier gas of powders.

A foam concrete composition (28) is disclosed as including limestone calcined clay cement (LC.sup.3) (20), used engine oil (UEO) (14), a foaming agent (10), and water (12). A method of forming a foam concrete composition is disclosed as including mixing limestone calcined clay cement (LC.sup.3) (20), used engine oil (UEO) (14), a foaming agent (10) and water (12).

The disclosure belongs to the technical field of materials for civil construction engineering, and specifically relates to a green and low carbon emission foamed lightweight soil prepared by using serpentine, magnesium oxide and CO.sub.2 as raw materials. In the serpentine carbon sequestration foamed lightweight soil, the ingredients of raw material include: magnesium oxide, serpentine, a filler, CO.sub.2 bubbles and water.

Provided herein are integrated biomass combustion-carbonation gas conditioning systems to directly sequester carbon dioxide from biomass-derived CO.sub.2-containing flue gas. The CO.sub.2 is sequestered by mineral carbonation in concrete materials within a carbonation reactor. The mineral carbonation processes sequester CO.sub.2 in concrete materials, aqueous slurries, or aggregates without any additional carbon enrichment process. Contacting a CO.sub.2-containing gas stream from a biomass combustion apparatus with concrete, aggregate, or alkaline solutions, causes a carbonation reaction in which carbonation products such as calcium carbonate (CaCO.sub.3) and alumina silica gel are formed. The carbonation reactions set forth herein are useful for strengthening concrete and concrete components. Certain processes herein condition the biomass-derived flue gas. The conditioning includes condensing the gas to remove acidic gas, and to remove particulates and water. The conditioning includes adjusting the temperature, relative humidity, and gas flow rate of the biomass-derived flue gas without any carbon capture step before entering the carbonation reactor. The permanent storage of CO.sub.2 in concrete materials reduces carbon emissions from biomass combustion systems. The process does so, in certain embodiments, at low temperatures, ambient pressure, and even under dilute CO.sub.2 concentrations in CO.sub.2-containing flue gas streams. For example, the CO.sub.2 concentration in a CO.sub.2-containing flue gas stream from a biomass combustion system may be lower than 20 volume percent (vol %) and be used to produce low-carbon concrete materials.

The disclosure belongs to the technical field of materials for civil construction engineering, and specifically relates to a green and low carbon emission foamed lightweight soil prepared by using serpentine, magnesium oxide and CO.sub.2 as raw materials. In the serpentine carbon sequestration foamed lightweight soil, the ingredients of raw material include: magnesium oxide, serpentine, a filler, CO.sub.2 bubbles and water.