The present disclosure relates more particularly to calcium sulfate-based slurries useful, for example, in making gypsum boards for building construction, as well as methods for using them, e.g., to make gypsum boards, in one aspect, the present disclosure provides a calcium sulfate slurry composition comprising calcium sulfate present substantially in the form of one or more hydrates, the calcium sulfate being present in an amount in the range of 70-99.8 wt % on a dry basis, calculated as stucco; and a cationic starch present in an amount of 0.10-10 wt % of the amount of calcium sulfate as stucco on a dry basis, the cationic starch being substituted with amine and/or ammonium groups and having a % N value in the range of 0.10 wt. % to 2 wt %, and an RVA viscosity value of at least 100 cP at 65 C. and 16 wt %; and water, in an amount sufficient to form a slurry. The disclosure also provides gypsum-based materials useful as building materials, e.g., for use as building boards in construction of walls and ceilings of buildings.

A method of plugging a honeycomb body includes mixing a plugging mixture at a mixing temperature, wherein the plugging mixture comprises a plurality of inorganic particles, inorganic binder, organic binder, and water; dispensing the plugging mixture into a patty mold at a dispensing temperature; cooling the plugging mixture within the patty mold to a cooled temperature, such that a cement patty is formed; and pressing the cement patty into a plurality of channels in a honeycomb body, wherein the mixing temperature and the dispensing temperature are above a hydration point temperature of the organic binder in the plugging mixture, and the cooled temperature is below the hydration point temperature of the organic binder in the plugging mixture.

Provided by the present invention is an additive for a slurry being capable of inhibiting viscosity elevation and dehydration at high temperatures at low cost, through use for a slurry for civil engineering and construction (for example, a drilling mud and a drilling cement slurry for use in well drilling. etc.), and the like. A powdery additive for a slurry, the powdery additive containing a vinyl alcohol polymer, which has: a solubility of 25% or less when immersed in hot water at 60 C. for 3 hours; a degree of saponification of at least 99.5 mol %; an average degree of polymerization of at least 1,500 and 4,500 or less; and the amount of 1,2-glycol linkage of 1.8 mol % or less, the powdery additive being capable of passing through a sieve having a nominal mesh opening size of 1.00 mm.

The present invention is directed to a plaster composition with a reduced carbon footprint and a method of making and using such plaster composition. In one aspect, the plaster composition may include a workability composition and a binder. When hydrated with water, a hydrated plaster composition may have enhanced workability, enhanced surface texture, enhanced finish, and may have a reduced carbon footprint as compared to a traditional plaster composition.

A viscosity reducer for asphalt recycled material is provided by this disclosure. The viscosity reducer for asphalt recycled material includes 10% to 40% by weight of a surface active dispersant, 20% to 40% by weight of a penetrant, 1% to 5% by weight of a plasticizer, 0% to 5% by weight of a emulsifier and the remaining proportion is a diluent. In addition, a method of preparing a viscosity reducer for asphalt recycled material is also disclosed in this disclosure. Besides, a method for applying a viscosity reducer for asphalt recycled material to recycled asphalt concrete material is also disclosed in this disclosure.

A grout composition includes a grout binder comprising calcium sulfate, the grout binder constituting from about 25.0 weight percent to about 99.0 weight percent of the grout composition, and at least one thermal conductivity additive comprising graphite. A grout formed from the grout composition has a thermal conductivity greater than about 1.0 W/m.Math.K. Related grout slurries formed from the grout composition, grouts, and methods of grouting a wellbore are also disclosed.

A grout composition includes a grout binder comprising calcium sulfate, the grout binder constituting from about 25.0 weight percent to about 99.0 weight percent of the grout composition, and at least one thermal conductivity additive comprising graphite. A grout formed from the grout composition has a thermal conductivity greater than about 1.0 W/m.Math.K. Related grout slurries formed from the grout composition, grouts, and methods of grouting a wellbore are also disclosed.

Disclosed are product (e.g., board), slurry, and methods relating to an uncooked starch that can be used to enhance strength in one or more gypsum layers in the board. The uncooked starch has a hot water viscosity of from about 20 BU to about 300 BU according to the HWVA method, and/or a mid-range peak viscosity of from about 120 Brabender Units to about 1000 Brabender Units.

Disclosed are product (e.g., board), slurry, and methods relating to an uncooked starch that can be used to enhance strength in one or more gypsum layers in the board. The uncooked starch bas a hot water viscosity of from about 20 BU to about 300 BU according to the HWVA method, and/or a mid-range peak viscosity of from about 120 Brabender Units to about 1000 Brabender Units.

The present invention relates to a two-component composition consisting of a component A intended to be mixed, in situ, with a component B in order to form an injectable or pumpable organo-mineral compound, in particular for injection-sealing dynamic anchor bolts, comprising at least one alkali metal silicate, at least one polyisocyanate derivative and at least one cement. The component A further contains at least one polyol having a molecular mass of between 50 and 200 g/mol, at least one polymerisation catalyst comprising at least one polar function and at least one gelling agent and the component B further comprises at least one suitable.