Abstract: A method of immobilizing a hazardous waste is provided. The method comprises providing a dry cementitious composition capable of hardening and in the form of finely divided particles of at least one cement binder, placing an amount of the dry cementitious composition into the hazardous waste with or without an additional added volume of water, without any type of physical mixing of the cementitious composition and water other than the mixing which occurs merely by applying the cementitious composition into the water. The major portion of the particles of the cementitious composition have approximately the same drop rate through the volume of water. The water contacts the dry cementitious composition when poured into the volume of water to hydrate the particles of the dry cementitious composition, the particles of cementitious composition dropping through the water to displace excess water and form the hydrated cementitious composition particles in a substantially non-segregated mass.

Abstract: A method of installing a post in a post hole includes the steps of providing a dry fast setting cementitious composition having a set time and in the form of finely divided particles of at least one cement binder, and pouring an amount of the dry cementitious composition into a volume of water located in a post hole without any type of physical mixing of the cementitious composition and water other than the mixing which occurs merely by applying the cementitious composition into the water. The major portion of the particles of the cementitious composition have approximately the same drop rate through the volume of water. The water contacts the dry cementitious composition when poured into the volume of water to hydrate the particles of the dry cementitious composition, the particles of cementitious composition dropping through the water to displace excess water and form the hydrated cementitious composition into a substantially non-segregated mass.

Abstract: A method of installing a cementitious composition includes providing a dry fast setting cementitious composition having a set time and in the form of finely divided particles of at least one cement binder, pouring an amount of the dry cementitious composition into a volume of water located in a hole without any type of physical mixing of the cementitious composition and water other than the mixing which occurs merely by applying the cementitious composition into the water. The major portion of the particles of the cementitious composition have approximately the same drop rate through the volume of water. The water contacts the dry cementitious composition when poured into the volume of water to hydrate the particles of the dry cementitious composition, the particles of cementitious composition dropping through the water to displace excess water and form the hydrated cementitious composition particles in a substantially non-segregated mass.

Abstract: A method of mixing materials includes a fluid medium, such as an aqueous fluid or a gas, continuously introduced into a mixing column for a time sufficient to allow the fluid to at least substantially fill the column. A predetermined amount of at least one primary material is introduced into the upper end of the mixing column. The primary material is permitted to descend through the fluid medium at a predetermined rate. Secondary materials are introduced into the mixing column through at least one end or through at least one position along the side of the mixing column at an angle and velocity sufficient to cause the secondary materials to intimately contact the primary material along its path of descent through the fluid medium so that the primary and secondary materials are continuously mingled as they descend through the fluid medium until they reach the lower end of the mixing column.

Abstract: Dry cementitious compositions and packages and methods for their application. The dry compositions do not have to be mixed with water but instead are poured, sprayed or troweled onto a substrate which contains water in an amount in excess of that necessary for the hydration of the cementitious materials. These compositions can be applied by layering, dropping through a conduit, or preferably, merely dropped into the water.

Abstract: Methods of forming a filled, cured two-component organic thermosetting composition by placing resin and hardener components on a substrate or in a container or mold and dropping particles of a filler material therethrough so that the resin and hardener components contact each other, react and cure, thus forming the cured composition.

Abstract: A method for molding a cementitious composition into an article having a desired shape or configuration by preparing a mold in a predetermined shape or configuration corresponding to the desired shape or configuration of the article, substantially filling the mold with water to provide a substantial excess of that needed for hydration of the cementitious composition which will be used to make the article, introducing into the water in the mold a dry cementitious composition in the form of finely divided particles of at least one cement binder in an amount of greater than 20 percent by weight of the composition, the major proportion of the particles having approximately the same drop rate, by pouring the composition into the water without any type of physical mixing of the cementitious composition and the water other than the mixing which occurs when the composition becomes completely hydrated by combining with a portion of the water and displacing excess water, if any, from the mold, and allowing the hydrated

Abstract: Dry cementitious compositions and methods for their application. The dry compositions do not have to be mixed with water but instead are poured, sprayed or troweled onto a substrate which contains a substantial excess of water than that necessary for the hydration of the materials.

Abstract: Dry cementitious compositions and methods for their application. The dry compositions do not have to be mixed with water but instead are poured, sprayed or troweled onto a substrate which contains a substantial excess of water than the necessary for the hydration of the materials. The dry cementitious material may be poured into water then applied to the substrate with no physical mixing other than that produced by pouring the cementitious composition into the water. The process also uses particles having similar drop rates and a cement content greater than 20% by wt.

Abstract: Dry cementitious compositions and methods for their application. The dry compositions do not have to be mixed with water but instead are poured, sprayed or troweled onto a substrate which contains a substantial excess of water than that necessary for the hydration of the materials.