The invention belongs to the technical field of the resource treatment of industrial wastes, and particularly relates to a method for preparing a cementing material using smelting industrial waste slag after utilizing the simultaneous removal of SO.sub.2 and NO.sub.x in flue gas and an application of the cementing material obtained by the same. According to the invention, SO.sub.2 and NO.sub.x in the flue gas can be treated with the smelting industrial waste slag, meeting requirement of flue gas desulfurization and denitration; moreover, the smelting industrial waste slag can be purified and separated by means of waste gas resources to obtain a cementing material, realizing the resource utilization of the smelting industrial waste slag and waste gas.

The invention belongs to the technical field of the resource treatment of industrial wastes, and particularly relates to a method for preparing a cementing material using smelting industrial waste slag after utilizing the simultaneous removal of SO.sub.2 and NO.sub.x in flue gas and an application of the cementing material obtained by the same. According to the invention, SO.sub.2 and NO.sub.x in the flue gas can be treated with the smelting industrial waste slag, meeting requirement of flue gas desulfurization and denitration; moreover, the smelting industrial waste slag can be purified and separated by means of waste gas resources to obtain a cementing material, realizing the resource utilization of the smelting industrial waste slag and waste gas.

Admixture for cementitious building materials can provide a self-healing mechanism to improve material longevity. In certain embodiments, the admixture can include the combination of both a quicklime-based replacement for fine and coarse aggregates and an SCM replacement for OPC in standard mortar and concrete.

An activator composition for a non-OPC hydraulically-active material comprises CaO or lime and a polycarboxylate-ether-based (PCE) superplasticiser, and is mixable with a hydraulically active material comprising ground granulated blast furnace slag (GGBS) and/or pulverized fuel ash (PFA) to form a cementitious binder. The cementitious binder does not comprise any Portland cement and is, therefore, more environmentally friendly.

An activator composition for a non-OPC hydraulically-active material comprises CaO or lime and a polycarboxylate-ether-based (PCE) superplasticiser, and is mixable with a hydraulically active material comprising ground granulated blast furnace slag (GGBS) and/or pulverized fuel ash (PFA) to form a cementitious binder. The cementitious binder does not comprise any Portland cement and is, therefore, more environmentally friendly.

A cementitious binder comprises at least 90% by weight of a hydraulically-active material comprising ground granulated blast furnace slag (GGBS) and/or pulverised fuel ash (PFA), and at least 0.1% by weight of CaO in an activator composition for the hydraulically-active material. The cementitious binder does not comprise any Portland cement and is, therefore, more environmentally friendly. The binder further comprises a superplasticiser such as a polycarboxylate ether (PCE). A concrete, mortar, grout, screed or render may be formed from a mixture of the cementitious binder, aggregate particles, water and superplasticiser.

A cementitious binder comprises at least 90% by weight of a hydraulically-active material comprising ground granulated blast furnace slag (GGBS) and/or pulverised fuel ash (PFA), and at least 0.1% by weight of CaO in an activator composition for the hydraulically-active material. The cementitious binder does not comprise any Portland cement and is, therefore, more environmentally friendly. The binder further comprises a superplasticiser such as a polycarboxylate ether (PCE). A concrete, mortar, grout, screed or render may be formed from a mixture of the cementitious binder, aggregate particles, water and superplasticiser.

The invention provides a binder composition comprising: (a) ground granulated blast furnace slag (GGBS), (b) basic oxygen slag (BOS), and (c) an alkaline inorganic waste material selected from by-pass dust (BPD), cement kiln dust (CKD), and mixtures thereof. The use of such a composition as a binder in a concrete mix, concrete mixes comprising such a composition, methods of manufacturing concrete articles, and concrete articles such as paving blocks are also provided.

The invention provides a binder composition comprising: (a) ground granulated blast furnace slag (GGBS), (b) basic oxygen slag (BOS), and (c) an alkaline inorganic waste material selected from by-pass dust (BPD), cement kiln dust (CKD), and mixtures thereof. The use of such a composition as a binder in a concrete mix, concrete mixes comprising such a composition, methods of manufacturing concrete articles, and concrete articles such as paving blocks are also provided.

An activator composition for a non-OPC hydraulically-active material comprises CaO or lime and a polycarboxylate-ether-based (PCE) superplasticiser, and is mixable with a hydraulically active material comprising ground granulated blast furnace slag (GGBS) and/or pulverized fuel ash (PFA) to form a cementitious binder. The cementitious binder does not comprise any Portland cement and is, therefore, more environmentally friendly.