A manufacturing process of a concrete product includes: (1) extracting calcium from solids as portlandite; (2) forming a cementitious slurry including the portlandite; (3) shaping the cementitious slurry into a structural component; and (4) exposing the structural component to carbon dioxide sourced from a flue gas stream, thereby forming the concrete product.

A green concrete comprising: a binder component comprising Portland cement, natural basaltic volcanic ash pozzolana, and metakaolin; an aggregate component comprising fine aggregates and coarse aggregates; water; and a super plasticizer.

A method for producing a supplementary cementitious material from concrete waste and similar materials includes the steps of i) providing a starting material comprising hydrated cement and aggregate comprising silicate and/or alumino-silicate, ii) hydrothermal treatment of the starting material provided in step i) to obtain a hydrothermally activated material, and iii) carbonation of the hydrothermally activated material of step ii) to provide the supplementary cementitious material, as well as supplementary cementitious material obtainable by the method, hydraulic binder comprising the supplementary cementitious material and use of the supplementary cementitious material and of the hydraulic binder for making hydraulic building materials.

The invention comprises a product. The product comprises a carbonation aid or a microporous material or a combination thereof and a carbonatable mineral containing one or more of un-carbonated Ca, Mg, Na, K, Fe, wherein the carbonation aid facilitates the conversion of one or more of CaO, MgO, Na.sub.2O, K.sub.2O or FeO to a carbonate or a CO.sub.3 containing mineral in the presence of CO.sub.2, wherein the carbonatable mineral has a volume-based mean particle size of less than or equal to 100 m and wherein one or more of the carbonation aid or a microporous material or a combination thereof or the carbonatable mineral has carbon dioxide bound thereto at a concentration greater than its atmospheric concentration.

Methods and systems for storing and mineralizing carbon dioxide in soil are disclosed herein. In some embodiments, the method comprises adding lime and carbon dioxide to a soil column including soil to form treated soil. After adding the lime and carbon dioxide, the method also includes strengthening the treated soil in the soil column by mineralizing the lime and carbon dioxide in the soil column. The method can further include adding a binder to the soil column and mixing the binder with the soil, lime, and carbon dioxide. The binder can include, for example, pozzolan, cement, cementitious material, and/or a manufactured calcium carbonate product.

The present concrete composition uses Asian carp fishmeal (the burned remains of the carp) as an admixture. The core principle behind the development of present concrete composition stems from attempting to find a beneficial use for a waste product in a civil engineering application. The incorporation of the fishmeal improves the cementitious properties when added to a concrete mix. Thus, the fishmeal concrete composition incentivizes the harvesting of Asian carp and the production of fishmeal.

Disclosed is a method for backfilling and reconstructing a carbon storage space in an abandoned main roadway and storing CO.sub.2. A surrounding rock of the main roadway is surveyed through geophysical exploration technology, and an anchor bolts (anchor cables) are used to reinforce and support an area which has unstable confining pressure bearing. According to a width and a height of the roadway section of the main roadway, a support formwork is forged in advance, and after the support formwork is placed in the main roadway, backfilling slurry is injected to the periphery of the support formwork. Meanwhile, supercritical carbon dioxide is injected into the backfilling slurry and the roadway, respectively.

Disclosed is a combined process of integrating stoping-backfilling and carbon storage. The combined process includes the following steps of: determining a cyclic interval of a working face through measured data of a mine pressure of a fully-mechanized coal winning working face; when the stoping distance of the fully-mechanized coal winning working face reaches a backfilling isolation interval, providing a backfilling tarpaulin behind a hydraulic support, and pumping, through a backfilling pipeline, backfilling slurry to a backfilling area along a support beam; when the area is backfilled with the backfilling slurry, injecting supercritical carbon dioxide into the backfilling slurry; and allowing the supercritical carbon dioxide to fully react with the backfilling slurry to solidify the backfilling slurry.

A low-carbon emission mineral casting material and a manufacturing method thereof, and an equipment including a low-carbon emission mineral casting are provided. The low-carbon emission mineral casting material includes a bonding agent, a first aggregate, and an additive agent. The bonding agent includes one or more of silicate, aluminate, or iron-aluminate. A first particle diameter of the first aggregate is less than or equal to 15 mm. The low-carbon emission mineral casting material provided by the present application has better heat resistance, lower thermal conductivity, lower expansion coefficient, and better shock-absorbing performance than traditional casting material.

A method for preparing a general-purpose cement is provided. Raw materials containing all of SiO.sub.2, Al.sub.2O.sub.3, CaO, MgO and Na.sub.2O (or K.sub.2O) are mixed to obtain a raw meal, which is dried and ground into a raw meal powder. The raw meal powder is oxidatively calcined at no less than 1210 C. to reach a stable phase state, and rapidly cooled to obtain a clinker predominated by glass phase. The clinker is mixed with NaOH, KOH or a combination thereof and ground to obtain the general-purpose cement. Alternatively, the clinker is ground to obtain a clinker powder, which is mixed with an aqueous NaOH solution, an aqueous KOH solution or a combination thereof for use. The NaOH and/or KOH is/are added such that a weight ratio of NaOH+0.713KOH to the clinker powder is 0-0.03:1.