A method for making a low cost, lightweight carbon aggregate from coal at, above, or below atmospheric pressure, and a lightweight concrete composition utilizing the lightweight carbon aggregate is described.

Provided herein are compositions, methods, and systems related to aggregates, such as e.g., lightweight aggregates, formed from the reactive vaterite cement compositions.

Provided herein are compositions, methods, and systems related to aggregates, such as e.g., lightweight aggregates, formed from the reactive vaterite cement compositions.

The invention relates to a method for producing a supplementary cementitious material for use in a cement product or concrete, the method comprising the steps of activating clay to the supplementary cementitious material at between 600 to 1000 degree Celsius; treating the activated supplementary cementitious material under reduced conditions to form a reduced product and cooling the reduced product to 300-400 degrees Celsius by a quenching process under oxidizing conditions.

The invention relates to a method for producing a supplementary cementitious material for use in a cement product or concrete, the method comprising the steps of activating clay to the supplementary cementitious material at between 600 to 1000 degree Celsius; treating the activated supplementary cementitious material under reduced conditions to form a reduced product and cooling the reduced product to 300-400 degrees Celsius by a quenching process under oxidizing conditions.

Described are cementitious reagent materials produced from globally abundant inorganic feedstocks. Also described are methods for the manufacture of such cementitious reagent materials and forming the reagent materials as microspheroidal glassy particles. Also described are apparatuses, systems and methods for the thermochemical production of glassy cementitious reagents with spheroidal morphology. The apparatuses, systems and methods makes use of an in-flight melting/quenching technology such that solid particles are flown in suspension, melted in suspension, and then quenched in suspension. The cementitious reagents can be used in concrete to substantially reduce the CO.sub.2 emission associated with cement production.

Described are cementitious reagent materials produced from globally abundant inorganic feedstocks. Also described are methods for the manufacture of such cementitious reagent materials and forming the reagent materials as microspheroidal glassy particles. Also described are apparatuses, systems and methods for the thermochemical production of glassy cementitious reagents with spheroidal morphology. The apparatuses, systems and methods makes use of an in-flight melting/quenching technology such that solid particles are flown in suspension, melted in suspension, and then quenched in suspension. The cementitious reagents can be used in concrete to substantially reduce the CO.sub.2 emission associated with cement production.

The invention relates to a method and furnace allowing the use of filter earth (diatomaceous earth) waste, in which the organic material is removed using the method of the application. The furnace comprises a container in which the industrial waste is deposited, and a folding table is used to transport the material. The invention also includes an agitator with a base, used to lower blades and remove the treated material. The gases generated are collected by an extractor which includes a cooling jacket and are subsequently sent to an absorber system in which they are neutralized. Said device and method are used to obtain lightweight materials with low porosity and high compression strength, rendering solid granular industrial waste that is dangerous to the environment suitable for use in the construction or mechanical industries.

The invention relates to a method and furnace allowing the use of filter earth (diatomaceous earth) waste, in which the organic material is removed using the method of the application. The furnace comprises a container in which the industrial waste is deposited, and a folding table is used to transport the material. The invention also includes an agitator with a base, used to lower blades and remove the treated material. The gases generated are collected by an extractor which includes a cooling jacket and are subsequently sent to an absorber system in which they are neutralized. Said device and method are used to obtain lightweight materials with low porosity and high compression strength, rendering solid granular industrial waste that is dangerous to the environment suitable for use in the construction or mechanical industries.

The invention relates to a method and furnace allowing the use of filter earth (diatomaceous earth) waste, in which the organic material is removed using the method of the application. The furnace comprises a container in which the industrial waste is deposited, and a folding table is used to transport the material. The invention also includes an agitator with a base, used to lower blades and remove the treated material. The gases generated are collected by an extractor which includes a cooling jacket and are subsequently sent to an absorber system in which they are neutralized. Said device and method are used to obtain lightweight materials with low porosity and high compression strength, rendering solid granular industrial waste that is dangerous to the environment suitable for use in the construction or mechanical industries.