Mortar with small autogenous shrinkage strain and a method for producing the same are provided.

Mortar has binder and fine aggregate, wherein the binder includes cement and fine mineral powder, and the mortar is formed by being mixed with water. The fine aggregate is air granulated ferronickel slag, and weight ratio of water to a combination of the binder and the fine aggregate is 7.0% or more and 9.0% or less. Such mortar can be produced by mixing binder, fine aggregate and water.

The present description relates to a method of producing a wet-cast slag-based concrete product particularly where the wet-cast slag-based concrete product is partially or completely set inside a mould, pre-conditioned outside of the mould and then cured with carbon dioxide in a curing chamber. The wet-cast slag-based concrete product is optionally reinforced.

A well cementation working solution prepared from red mud, slag and waste drilling fluids. The working solution is prepared from the following components in parts by weight: 100 parts of waste drilling fluids, 50-100 parts of slag, 5-50 parts of red mud, 4-7 parts of a suspension stabilizer, 1-7 parts of an activating aid, 0.5-5 parts of an anti-pollution agent and 0.4-3.5 parts of a diluent. The waste drilling fluids are waste waterborne drilling fluids. The slag is blast furnace slag or vanadium-titanium slag. The suspension stabilizer is sodium bentonite, carboxymethyl cellulose or a mixture of sodium bentonite and carboxymethyl cellulose. The activating aid is sodium metasilicate nonahydrate, sodium carbonate or a mixture of sodium metasilicate nonahydrate and sodium carbonate. The anti-pollution agent is sodium salicylate, potassium citrate or a mixture of sodium salicylate and potassium citrate. The diluent is sodium lignin sulfonate.

The invention relates to fluxing agents for the agglomeration process based on slag from the secondary metallurgy, the use of these fluxing agents in the process of agglomeration in the manufacture of the agglomerate designed for the use as a metallic charge in blast furnaces and a process of production of fluxing agents based on slag from the secondary metallurgy or based on a mixture of slag from the secondary metallurgy with other materials.

A binder composition for mortar or concrete, includes an iron-containing silicate precursor. The silicate precursor includes at least 20 wt % Fe, calculated as if present in the form Fe.sub.2O.sub.3, and at most 80 wt % Fe, calculated as if present in the form Fe.sub.2O.sub.3, with reference to the dry composition. The silicate precursor includes at most 30 wt % Al.sub.2O.sub.3, with reference to the dry composition; an alkali-containing activator; and an iron-complexing agent.

A method of producing a carbonate bonded article includes preparing a reactive mixture having a particulate mineral source and an aqueous source, and reacting the reactive mixture with carbon dioxide to form a mineral matrix including carbonates. The particulate mineral source includes a leachable compound, the leachable compound including one or more elements selected from: As, Ba, Cd, Cr, Co, Cu, F, Hg, Mo, Mn, Ni, Pb, Sb, Se, V, and Zn. The reactive mixture includes a reducing agent, where the reducing agent includes one or more of a sulfide, disulfide, and polysulfide compound that reacts with the particulate mineral source. The pH of the reactive mixture is at least 10.

The present description relates to methods of producing a wet-cast slag-based concrete product particularly where the wet-cast slag-based concrete product is cast, pre-conditioned and cured with carbon dioxide inside a mould and/or inside a mould placed in a curing chamber. The wet-cast slag-based concrete product is optionally reinforced.

The present description relates to a method of producing a wet-cast slag-based concrete product particularly where the wet-cast slag-based concrete product is partially or completely set inside a mould, pre-conditioned outside of the mould and then cured with carbon dioxide in a curing chamber. The wet-cast slag-based concrete product is optionally reinforced.