Abstract: The present invention concerns a Portland cement-free porous rigid mineral substrate made of alkali-activated pozzolans, a method for preparing the same, and use of said substrate to optimize plant germination and growth.

Abstract: Some embodiments are directed to a new castable cement based material containing a special admixture based internal curing system to reduce the shrinkage and avoid the formation of cracks, and method of producing the same.

Abstract: Method to artificially agglomerate finely divided materials. A method to agglomerate finely divided material into aggregates, the aggregates being larger than the finely divided material, comprising the steps of (a) mixing finely divided material, binder and water in a mixer, (b) adding an agglomerating agent to the mix formed in step (a) and mixing constantly. Finely divided material is selected from the group consisting of cement, sand, clay, glass, slag, fly ash, stone powder, bypass dust, limestone, silica fume, crushed brick, brick powder and crushed stone or a combination thereof.

Abstract: A concrete mix having sand, fine aggregates, binder, fibers, and various admixtures is provided. The mix has a consistency from S2 to SF3, a compressive strength in the range of 30-80 MPa and a ductility represented by fc, ffl, fR1 and fR3 values, wherein the concrete mix contains at least 390 Kg of binder, the concrete mix has a paste volume of 300-600 liters, the concrete mix contains at least two systems of fibers and a general admixture system that is composed of at least 2 sub-admixture systems.

Abstract: Construction castable material with controllable flow or slump comprising (a) a binder comprising fly ashes comprising from 1.5% to 35% by weight of CaO and a Lost on Ignition (LOI) value from 0.5% to 5.5% by weight, representing from 10% to 60% of the binder weight and ground granulated blast furnace slag comprising from 40% to 70% by weight of CaO and from 30 to 60% by weight of SiO2, representing from 40% to 90% of the binder weight, (b) an activator comprising alkaline reagents selected from the group composed by water glass, preferably in solution with 30 to 50% by weight solid content, sodium metasilicates and sodium hydroxide, (c) sand, fine and coarse aggregates and (d) organic acids or conjugated salts of organic acids in a dosage from 0.001% to 3% by weight with respect to the binder.

Abstract: A method for placement of roller compacted concrete (RCC) on a sub-base to produce a concrete pavement, which has: (a) dosing a concrete or concrete ingredients and loading the concrete or concrete ingredients into a concrete transportation truck, (b) adding at least one pelletizing agent to the concrete and waiting from 3 to 15 minutes under constant mixing to produce a pelletized concrete and (c) discharging the pelletized concrete obtained in step (b) on the sub-base from the concrete transportation truck, rotating the drum of the concrete transportation truck.

Abstract: A concrete mix design having a slump class from S1 to S5 or a flow class from F1 to F6 and a workability retention between 10 minutes and 120 minutes, comprising from 150 to 600 kg of cement per cubic meter of concrete, aggregates selected from the group consisting of sand, fine aggregates, coarse aggregates or combinations thereof containing between 0.5 wt. % and 75 wt. % of phyllosilicates, is characterized in that the concrete mix design includes an admixture system 1 which is based on 100% polycarboxylate ether based copolymer (PCE), the admixture system 1 comprising at least one component B1 being a PCE copolymer.

Abstract: The invention relates to a method for producing aggregate and calcium carbonate from concrete aggregate, and a device for carrying out said method.

Abstract: A method to produce a cement with an integrated curing agent for concrete mixtures, mortars and other cement-based materials is disclosed. The method describes an integrated milling of all cement components (clinker, gypsum and other additives) and the curing agent, that will allow reducing the plastic shrinkage cracking on the casted elements that use this cement-based mix.

Abstract: Cellular concrete aggregates sized between 2 and 25 mm and having a bulk density in the dry state of between 200 and 600 kg/m3 enable their agglomeration by a binder for the manufacture of lightweight and insulating concrete or for the manufacture of slabs, screeds, formwork walls or prefabricated parts. A process for manufactures cellular concrete aggregates of at least 2 mm.

Abstract: The invention relates to a method for producing aggregate and calcium carbonate from concrete aggregate, and a device for carrying out said method.

Abstract: The disclosure relates to a method to produce electricity in a cement clinker production utilizing a kiln and/or a precalciner as combustion chambers to generate electricity, the method including: a. supplying fuel to the precalciner and/or the kiln in a quantity corresponding to at least 110% of a heat value requirement for clinker production operation of the precalciner and/or the rotary kiln per unit weight of clinker, respectively; b. bypassing a portion of hot flue gases from at least one of (i) the kiln and/or (ii) the precalciner; c. leading hot flue gases to a heat recovery steam generator producing steam; d. producing electricity with a power island including a steam turbine equipped with an electrical generator.

Abstract: The invention concerns a method for beneficiation of fly ash particles comprising: determining the heat value of the fly ash particles; comparing the determined heat value of the fly ash particles with a minimum heat value K; feeding an inlet of a combustor (5) with a feed material comprising the fly ash particles and, in case the determined heat value is lower than the minimum heat value K, fuel in sufficient quantity to assure that the heat value of the raw material is greater than or equal to the minimum heat value K; supplying an upstream airflow to the combustor (5) so as to carry the feed material in suspension from the inlet to an outlet of the combustor; operating the combustor (5) at a temperature of at least 700° C.; collecting beneficiated fly ash particles from the airflow at the outlet of the combustor (5). The invention also concerns an installation for implementation of the said method.

Abstract: A method for producing a clinker for cement, comprising grinding a raw flour comprising, especially, Al2O3, Fe2O3 and SO3 in contents such that the formula for calculating SO3 content of=0.261×Al2O3?0.638×Fe2O3+k, where 2.5<k<3.5, then by sintering flour in an overn wherein the temperature is between 1250° C. and 1350° C. and oxygen content is between 2.5% and 10% by volume.

Abstract: A method of constructing a wall to meet an applicable building code, and a wall created by this method. The method may include placing insulating concrete forms, having a cavity, where the wall is to be constructed; placing a limited quantity of metal reinforcement steel within the cavity, such that the limited quantity of reinforcing steel is insufficient to meet the applicable building code; and pouring a mix of aggregate, sand, cement, fly ash, and mineral fibers into the cavity; and allowing the mix to cure, thereby meeting the applicable building code without additional metal reinforcement. The mix may between 45 and 50% stone, between 30 and 35% sand, between 10 and 12% Portland cement, between 5 and 8% fly ash, between 1 and 2% mineral fibers, and between 0 and 1% admixtures by weight. The mix may contain mineral fibers of different grades and/or dimensions.

Abstract: Cellular concrete aggregates sized between 2 and 25 mm and having a bulk density in the dry state of between 200 and 600 kg/m3 enable their agglomeration by a binder for the manufacture of lightweight and insulating concrete or for the manufacture of slabs, screeds, formwork walls or prefabricated parts. A process for manufactures cellular concrete aggregates of at least 2 mm.

Abstract: A method for producing a clinker for cement, comprising grinding a raw flour comprising, especially, Al2O3, Fe2O3 and SO3 in contents such that the formula for calculating SO3 content of=0.261×Al2O3?0.638×Fe2O3+k, where 2.5<k<3.5, then by sintering flour in an overn wherein the temperature is between 1250° C. and 1350° C. and oxygen content is between 2.5% and 10% by volume.

Abstract: The disclosure concerns cost effective concrete formulations based on an alkali activated binder. The construction material of the concrete type, contains sand, fine aggregates, coarse aggregates, water and a binder comprising: from 55 to 80 wt. % of fly ash containing less than wt. 8% of CaO; from 15 to 40 wt. % of blast furnace slag; a chemical activator containing: from 0.8 to 4 wt. % of alkaline silicates; and from 1.5 to 9 wt. % of alkaline carbonates; wherein the chemical activator has an silica to alkali molar ratio from 0.1 to 0.55; and a booster comprising at least one strong base. The disclosure also concerns a method to produce such a concrete construction material.

Abstract: A method for capturing CO2 produced by cement plants by using the calcium cycle method comprising the integration of the process known as calcium cycle to the cement plant by using the cement plant raw materials and sub products in the calcium cycle plant and by using the calcium cycle plant raw materials, sub products and residual energy in the cement plant.

Abstract: A self-compacting concrete and mortar additive is prepared, comprising an aqueous suspension matured and stabilized for 1-7 days, preferably 1-2 days, and having a consistency adapted to the dosing equipment used for dosing the additive when mixing concrete or mortar, and having a pH of 6.5-8, preferably 7 and containing 5-30, preferably 8-20, preferably 10-12% by weight of dry solid of a type of clay, consisting of clay minerals selected from the smectite, vermiculite and/or chlorite group.