The application generally relates to a process for producing variants of concrete exposed aggregate finish (EAF) based on selected ratios from local and import, fine and coarse aggregate components. In particular, the process allows a user to select the desired appearance of the end result exposed aggregate finish, by selecting a ratio of local vs import fine aggregate and/or a ratio of local vs import coarse aggregate. Thus, the process allows for the ability to create a spectrum of daily variations of overall concrete mixes in order to achieve daily end result exposed aggregate finish.

Disclosed herein is a method and an apparatus for producing a shaped article. The method comprises obtaining a freshly produced aluminosilicate-containing particulate waste material and, before the waste material cools to ambient temperature, mixing the waste material into a mixture, wherein the mixture comprises the aluminosilicate, a metal oxide, an alkali, a water soluble silicate and water; shaping the mixture; and curing the shaped mixture, whereby the shaped article is produced.

Provided herein are cementitious materials, for example, a crack-resistant cementitious mortar. The cementitious materials are a mixture of cement, at least one recycled fiber reinforcement material, a recycled aggregate material, and water. Also provided is a method for increasing the crack-resistance of a cementitious material by replacing the sand in a cement mortar with a recycled aggregate material and adding at least one recycled fiber reinforcement material and a volume of water.

Systems and methods are disclosed for producing a shaped cementitious article comprising mixing foamed glass aggregate particles, Portland cement, and water, placing the mixture into a mold, applying vibration and/or pressure to the mold, removing the mold, and then curing the molded concrete article. The shaped cementitious article may be a concrete block (e.g., a solid block, a hollow block, a flue, a curb, or a paver). The concrete block may be a relatively lightweight formed concrete block defining a hollow interior portion (e.g., “cinder block” shaped).

Embodiments of a dry mix for producing a concrete composition are provided. The dry mix includes aggregate, cement, and bed ash. The bed ash contains the combustion product of a fluidized bed coal combustion reaction. Additionally, embodiments of a method of preparing the dry mix and embodiments of a method of preparing a concrete composition are provided. The dry mix is also suitable for repairing soil slips, and embodiments of a method of repairing a soil slip are also provided.

The disclosure provides a ceiling tile including a curable coating composition including 10-50 vol. % inorganic binder, based on the total volume of solids in the dry coating composition, wherein the inorganic binder is an alkali metal silicate or an alkaline earth metal silicate and 50-90 vol. % inorganic filler, based on the total volume of solids in the coating composition, wherein the binder and the filler are not the same and the coating is substantially free of an organic polymeric binder. The ceiling tiles have a backing side and an opposing facing side, and a cured coating layer disposed on the backing side of the panel, the backing side being directed to a plenum above the fibrous panel in a suspended ceiling tile, the cured coating layer including the curable coating composition of the disclosure.

The present invention relates to fiber cement products comprising an inner core material, which inner core material is covered by at least one outer surface layer, characterized in that: —said inner core material has a density of between about 0.4 and about 0.9 g/cm.sup.3 inclusive, and at least comprises cement and between 1 wt % and 70 wt % (with respect to the total dry weight of said inner core material) of a lightweight filler, and—said at least one outer surface layer has a density of between about 0.9 and about 1.4 g/cm.sup.3 inclusive, and at least comprises fibers and cement.

An accelerator powder for cement and also rapid-setting binder compositions which contain the accelerator powder and the use in mortar or concrete. The accelerator powder includes from 10 to 99.7% by weight of a water-insoluble mineral powder P and from 0.3 to 90% by weight of at least one compound V selected from the group consisting of alkali metal halides and alkaline earth metal halides, alkali metal nitrates and alkaline earth metal nitrates, alkali metal nitrites and alkaline earth metal nitrites, alkali metal thiocyanates and alkaline earth metal thiocyanates and hydroxyalkylamines or salts thereof, and mixtures thereof.

The invention relates synthetic silicate granules comprising a mixture of SiO.sub.2, Al.sub.2O.sub.3 and Na.sub.2O, which can be obtained by sintering; to their use in manufacturing an agglomerate stone material and to the agglomerate stone material resulting thereof.

The invention relates to an aerogel concrete mixture containing a photocatalyst, a photocatalytically active high-performance aerogel concrete obtainable therefrom and a method for producing same.