The invention comprises a composition comprising hyaloclastite having a volume-based mean particle size of less than or equal to 40 m. The invention also comprises a cementitious material comprising a hydraulic cement and hyaloclastite, wherein the hyaloclastite has a volume-based mean particle size of less than or equal to approximately 40 m. The invention further comprises a cementitious-based material comprising aggregate, a cementitious material comprising a hydraulic cement and hyaloclastite, wherein the hyaloclastite has a volume-based mean particle size of less than or equal to approximately 40 m and water sufficient to hydrate the cementitious material. A method of using the composition of the present invention is also disclosed.

A method for making geopolymer cementitious binder compositions for cementitious products such as concrete, precast construction elements and panels, mortar and repair materials, and the like is disclosed. The geopolymer cementitious compositions of some embodiments are made by mixing a synergistic mixture of thermally activated aluminosilicate mineral, calcium aluminate cement, a calcium sulfate and a chemical activator with water.

Sub-ambient daytime radiative cooling (SDRC) coating comprising: an alkali activated metakaolin, BaSO.sub.4, and silica nanospheres, wherein the alkali activated metakaolin is prepared by reaction of metakaolin with an alkali activator comprising waterglass and a strong base selected from the group consisting of LiOH, NaOH, KOH, Ca(OH).sub.2, Li.sub.2O Na.sub.2O, K.sub.2O, CaO, and a mixture thereof, a coating formulation comprising the same, and a method of preparation and use thereof.

An embodiment includes a Class C fly ash (CFA) cementitious composition with a controllable setting time comprising at least one Class C fly ash; at least one alkali hydroxide; at least one source of phosphate; and water. Alternate embodiments include a Class C fly ash (CFA) cementitious composition with a solid activator comprising at least one Class C fly ash; at least one alkali carbonate; at least one source of phosphate; and water.

This geopolymer molding production method comprises: a mixing step (S1) for mixing a first material containing aluminum and silicon with a hydrate of an alkali stimulant containing a hydrate of an alkaline hydroxide and/or a hydrate of an alkaline silicate; a compaction step (S2) for compacting the mixture obtained in the mixing step (S1) into a compacted mixture; and a curing step (S3) for curing the compacted mixture.

Disclosed herein are a lightweight geopolymer foam with low thermal conductivity and a manufacturing method therefor in which coal bottom ash and fly ash are used together as materials for the geopolymer foam and silica fume is added to a mixed solution of an alkali activator and sodium hydroxide. The geopolymer foam can be utilized for improving insulation performance and safety for a structure constructed with eco-friendly cement.

Cement compositions that can capture carbon dioxide and related methods are generally described.

The present invention is a ceramic sol-gel coating system. A sol-gel solution is applied to a tilled roadbed. The roadbed is formed, then a cross-linker is applied. The roadbed is then rolled. The sol-gel solution and cross-linker react to form a ceramic sol-gel coating around the road aggregate. The coating reacts with carbon dioxide in the air to form calcium carbonate rock, capturing the carbon dioxide directly from the air.

A method for manufacturing cement may include: supplying at least one etching effluent of a substrate based on silicon including a silicate of an alkali metal, M, having formula SiO.sub.2:M.sub.2O, and having a molar ratio SiO.sub.2/M.sub.2O greater than or equal to 0.8; supplying an aluminosilicate raw material, and mixing the aluminosilicate raw material with the etching effluent having a molar ratio SiO.sub.2/M.sub.2O greater than or equal to 0.8. The silicate solution of alkali metal may be recovered with an existing silicon industrial process, implementing a silicon etching. The environmental impact of the method of manufacturing cement may therefore be reduced.

Geopolymer compositions, and methods of making and using the same are provided. Coatings and composite products prepared from geopolymer compositions are also provided.