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US 4,732,781 AGranted
Methods for applying no mix cements
AssigneeNomix Corporation
InventorsH. Nash Babcock, Edward P. Holub
Life of this patent
Estimating the term…
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.
Claims32
A method for installing a cementitous composition upon a substrate which comprises:
- saturating a substrate with water in substantial excess of that needed for hydration of the cementitious composition which is to be applied;
- applying to said saturated substrate a dry cementitious composition comprising greater than 20 weight percent of the composition of finely divided particles of at least one cement binder, the major proportion of the particles having approximately the same drop rate, said composition applied to said saturated substrate without any type of physical mixing of the cementitous composition and water other than the mixing which occurs merely by applying the cementitious composition into said water and in a manner such that the cementitious composition combines with a portion of the water to completely hydrate the dry composition while displacing the remainder of the water from said substrate;
- and
- allowing said hydrated cementitious composition to cure to a solid mass.
1 more element
A method for installing a cementitious composition upon a substrate which comprises:
- saturating the substrate with water in substantial excess of that needed for hydration of the cementitious composition which is to be applied;
- applying to said saturated substrate a dry cementitious composition in the form of finely divided particles and having a cement binder content in excess of 20 weight percent of the composition, the major proportion of the particles having approximately the same drop rate, said composition applied to said substrate 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 and in a manner such that the cementitious composition combines with a portion of the water to completely hydrate the dry composition the major proportion of the particles having approximately the same drop rate, said composition applied while displacing the excess water, if any, from said substrate;
- and
- allowing said hydrated cementitious composition to cure to a solid mass.
1 more element
A method for repairing a discontinuity or aperture in a substrate which comprises:
- substantially filling said discontinuity or aperture with water to provide a substantial excess of that needed for hydration of the amount of cementitious material which is to be used to fill said discontinuity or aperture;
- substantially filling said discontinuity or aperture with a dry cementitious composition in the form of finely divided particles having a cement binder content in excess of 20 weight percent of said composition wherein the major proportion of the particles have approximately the same drop rate by pouring said composition into said water without any type of physical mixing of the cementitious composition and water other than the mixing which occurs when the dry cementitious composition is poured into the water such that the cementitious composition becomes completely hydrated by combining with a portion of the water and displacing excess water, if any, from said discontinuity or aperture;
- and
- allowing said hydrated cementitious composition to cure to a solid mass.
1 more element
A method of pouring a cementitious composition through water into a cavity which will not retain the water, which comprises:
- thoroughly soaking the surfaces of the cavity;
- introducing a fast-setting cementitious composition onto the inner surfaces of the cavity to reduce or prevent water seepage therethrough;
- refilling the cavity with water in substantial excess of that needed for hydration of the dry cementitious composition which is to applied;
- pouring a dry cementitious composition comprising greater than 20 weight percent of the composition of finely divided particles of at least one cement binder, wherein the major proportion of the particles have approximately the same drop rate into the water in the cavity without any physical mixing other than that produced by pouring the cementitious composition into the water and in a manner such that the cementitious composition combines with a portion of the water to completely hydrate the dry composition;
- and
- allowing the hydrated composition to cure to a solid mass.
3 more elements
Dependencies are inferred from the claim text.