Abstract:
Self-repairing, fiber reinforced matrix materials include a matrix material including inorganic as well as organic matrices. Disposed within the matrix are hollow fibers having a selectively releasable modifying agent contained therein. The hollow fibers may be inorganic or organic and of any desired length, wall thickness or cross-sectional configuration. The modifying agent is selected from materials capable of beneficially modifying the matrix fiber composite after curing. The modifying agents are selectively released into the surrounding matrix in use in response to a predetermined stimulus be it internal or externally applied. The hollow fibers may be closed off or even coated to provide a way to keep the modifying agent in the fibers until the appropriate time for selective release occurs. Self-repair, smart fiber matrix composite materials capable of repairing microcracks, releasing corrosion inhibitors or permeability modifiers are described as preferred embodiments in concrete and polymer based shaped articles.
Abstract:
Self-repairing, fiber reinforced matrix materials include a matrix material including inorganic as well as organic matrices. Disposed within the matrix are hollow fibers having a selectively releasable modifying agent contained therein. The hollow fibers may be inorganic or organic and of any desired length, wall thickness or cross-sectional configuration. The modifying agent is selected from materials capable of beneficially modifying the matrix fiber composite after curing. The modifying agents are selectively released into the surrounding matrix in use in response to a predetermined stimulus be it internal or externally applied. The hollow fibers may be closed off or even coated to provide a way to keep the modifying agent in the fibers until the appropriate time for selective release occurs. Self-repair, smart fiber matrix composite materials capable of repairing microcracks, releasing corrosion inhibitors or permeability modifiers are described as preferred embodiments in concrete and polymer based shaped articles.
Abstract:
A mixture composition of a cellulose ether made from raw cotton linters and at least one additive is used in a cement extrusion mortar composition wherein the amount of the cellulose ether in the cement extrusion mortar composition is significantly reduced. When this cement extrusion mortar composition is mixed with a sufficient amount of water and extruded to form an object with comparable or lower crack formation, the plastification and/or extrusion properties of the resulting wet mortar are improved or comparable as compared to when using conventional similar cellulose ethers.
Abstract:
A mixture composition of a cellulose ether made from raw cotton linters and at least one additive is used in a dry cement based plaster (or render) composition wherein the amount of the cellulose ether in the render composition is significantly reduced. When this render composition is mixed with water and applied to a substrate, the water retention and thickening and/or sag resistance of the wet plaster are comparable or improved as compared to when using conventional similar cellulose ethers.
Abstract:
The invention relates to fiber compositions that can be pumped and metered in the fashion of fluid chemical admixtures into a concrete mix, thereby enabling the fibers to be dispensed by concrete ready-mix plant operators who can provide verification of fiber administration and dosage. The fibers, particularly plastic shrinkage control fibers having large cumulative surface area, are suspended in an aqueous or non-aqueous medium such that their surface area is already wetted out, thereby virtually assuring that substantial uniform fiber dispersion can be achieved without clumping and the delay that is usually required by fiber intermixing.
Abstract:
A chromium VI reducing composition comprising particles of solid material selected from the group consisting of iron (II) sulfate and tin sulfate, the particles being substantially uniformly dispersed within a liquid carrier. Methods for modifying hydratable cementitious materials using the chromium reducing composition are also disclosed and provide advantages over dry powder or dissolved forms of sulfate compositions when used in cement manufacturing.
Abstract:
A mixture composition of a cellulose ether made from raw cotton linters and at least one additive is used in a dry tile cement composition wherein the amount of the cellulose ether in the tile cement composition is significantly reduced. When this tile cement composition is mixed with water and applied to a substrate, the correction time, applicability, and sag resistance of the wet mortar are comparable or improved as compared to when using conventional similar cellulose ethers.
Abstract:
A capsule delivery system provides for the delivery and dispensing of fluid or semi-fluid admixtures into concrete mixes. The capsule is made of a plastic resin and contains a pre-measured dosage of admixture. Once the capsule containing the admixture enters a concrete mix and the concrete mix is agitated mechanically such as via a concrete ready-mix truck, the plastic resin delivery and dispensing capsule shatters and breaks down unnoticeable to the unaided eye, releasing the encapsulated admixture into the concrete mix.
Abstract:
The invention relates to fiber compositions that can be pumped and metered in the fashion of fluid chemical admixtures into a concrete mix, thereby enabling the fibers to be dispensed by concrete ready-mix plant operators who can provide verification of fiber administration and dosage. The fibers, particularly plastic shrinkage control fibers having large cumulative surface area, are suspended in an aqueous medium such that their surface area is already wetted out, thereby virtually assuring that substantial uniform fiber dispersion can be achieved without clumping and the delay that is usually required by fiber intermixing.
Abstract:
The invention relates to fiber compositions that can be pumped and metered in the fashion of fluid chemical admixtures into a concrete mix, thereby enabling the fibers to be dispensed by concrete ready-mix plant operators who can provide verification of fiber administration and dosage. The fibers, particularly plastic shrinkage control fibers having large cumulative surface area, are suspended in an aqueous medium such that their surface area is already wetted out, thereby virtually assuring that substantial uniform fiber dispersion can be achieved without clumping and the delay that is usually required by fiber intermixing.