Abstract:
A method for reducing aggregate material carry back in aggregate material hauling equipment includes applying an effective amount of an anti-sticking and anti-icing agent to hauling surfaces of the aggregate material hauling equipment that will subsequently be in contact with the aggregate material to be hauled. The method includes initiating loading of the aggregate material into the aggregate material hauling equipment while the hauling surfaces of the hauling equipment remain wet from the applying of the anti-sticking and anti-icing agent. This ensures wetting of the aggregate material at the interface with the hauling surface to provide improved anti-sticking and anti-icing action.
Abstract:
Suggested is a novel coated particle of active ingredients with controlled release properties at pH-values from 10 to 14, wherein the active ingredient is selected from one or more construction chemical additives for the control of inorganic binders, characterized in that the coating comprises shellac, a process for its manufacture and the use thereof as an additive for mortars, dry mortars, cement slurries and/or concretes.
Abstract:
Disclosed herein are composites capable of self-repairing. In some examples, the composites include a binding medium and a plurality of binding medium-repairing particles. The binding medium-repairing particles disclosed herein comprise a reactive agent encapsulated in a shell, where the reactive agent can interact with the binding medium to form an aggregate in the presence of an aqueous medium. Also disclosed herein are methods for making the composites and methods for making the binding medium-repairing particles.
Abstract:
A fiber-cement product which includes a treated cellulose wood pulp fiber. The fiber is treated with fibrillated carboxymethyl cellulose or a carboxyethyl cellulose and poly (diallyldimethyl ammonium)chloride. The fiber can be bleached or partially bleached, refined or unrefined or a mixture of refined and unrefined fiber.
Abstract:
Expansive cements for use in cementing subterranean wells contain an encapsulated gas-generating substance. The gas-generating substance comprises one or more materials that release hydrogen, nitrogen or both. The gas-generating substance is encapsulated by a coating comprising a polymer. The coating prevents premature gas release at the surface during slurry mixing, and promotes gas release at a desired location in the subterranean well. The released gas may also control the internal pore pressure of the cement slurry, thereby inhibiting the invasion of formation fluids into the borehole.
Abstract:
An embodiment of a sizing composition for glass fibers comprises a starch, a nonionic lubricant, and a silane comprising at least one amine and at least one aryl or arylene group. Embodiments of fiber glass strands comprise at least one glass fiber at least partially coated with a sizing composition of the present invention. Embodiments of fiber glass strands can have tensile strengths that make the fiber glass strands desirable for certain processes, applications, and/or end uses.
Abstract:
The invention provides a well treatment composition comprising: a viscoelastic surfactant or a cementing composition and an environmentally friendly component made of cellulosic matrix with organic acid trapped within. A method is disclosed comprising introducing into a wellbore penetrating a subterranean formation an environmentally friendly component made of cellulosic matrix with organic acid trapped within.Also, the invention provides a method for rheology modification optimization of a viscoelastic surfactant, comprising: (a) defining a rheology profile of the viscoelastic surfactant; (b) defining a comparative rheology profile of a composition of the viscoelastic surfactant and a first environmentally friendly naturally occurring component made of cellulosic matrix with organic acid derivative trapped within; (c) repeating step (b) with a second environmentally friendly component made of cellulosic matrix with organic acid derivative trapped within; (d) defining between the first and second environmentally friendly components, environmentally friendly component showing optimum modification of the rheology based on analysis of the rheology profile and comparative rheology profile.
Abstract:
A gypsum-based composite structure is prepared from a slurry comprising a mixture of calcium sulfate hemihydrate, a cellulose ether additive other than CMC and an amount of water that is sufficient to form a slurry. The calcium sulfate hemihydrate is hydrated by the water forming a wallboard core reinforced by the cellulose ether additive. The concentration, viscosity grade and degree of substitution of the cellulose ether are selected to give the composite improved nail pull resistance and greater flexural strength.
Abstract:
A method for forming a super-insulating material for a vacuum insulated structure for an appliance includes disposing hollow glass spheres within a rotating drum, wherein a plurality of interstitial spaces are defined between the hollow glass spheres. An anchor material is disposed within the rotating drum. The hollow glass spheres and the anchor material are rotated within the rotating drum, wherein the anchor material is mixed with the hollow glass spheres to partially occupy the interstitial spaces. A silica-based material is disposed within the rotating drum. The silica-based material is mixed with the anchor material and the hollow glass spheres to define a super-insulating material, wherein the silica-based material attaches to the anchor material and is entrapped within the interstitial spaces. The silica-based material and the anchor material occupy substantially all of an interstitial volume defined by the interstitial spaces.
Abstract:
Cement paste compositions including modified cellulose nanomaterials such as modified cellulose nanocrystals and modified cellulose nanofibers, are disclosed herein. In some embodiments, the cement paste compositions include from about 0.005 volume % to about 1.5 volume % modified cellulose nanomaterial.