Joint compounds and spackling compounds which comprise a sanding indicator, the compounds displaying a first color at the surface upon drying/hardening. Methods for finishing a substrate or patching a substrate, the methods comprise applying the joint compound which comprises the sanding indicator and/or the spackling compound which comprises the sanding indicator and sanding the dried/hardened compound until the first color is removed. Accessory products which comprise at least one sanding indicator and methods for making joint compounds and spackling compounds comprising the sanding indicator.

A large-tonnage disc-shaped suspension ceramic insulator includes a ceramic insulator body, and a metal pin and a metal cap coaxially assembled with the ceramic insulator body through adhesive material, assembly interfaces of the ceramic insulator body, the metal cap, and the metal pin are coated with a primer; the adhesive material includes an expansion agent; and the expansion agent is configured to make the adhesive material expand after hardening so as to create a prestress between the ceramic insulator body and the metal pin as well as the metal cap. The present disclosure achieves overall compressive prestress distribution of the ceramic insulator product, mitigating thermal stress caused by temperature changes and improving the tensile strength of the large-tonnage disc-shaped suspension ceramic insulator assembly. By treating the assembly interfaces with the primer, the present disclosure significantly improves the assembly strength of the ceramic insulator/metal assembly.

A mineral expanding foam is based on one or more foam stabilizers, one or more air pore formers selected from the group comprising ammonium salts or alkali metal salts of the hydrogencarbonates or carbonates, optionally one or more fillers, and optionally one or more additives. The mineral expanding foam is additionally based on one or more protective colloid-stabilized polymers of ethylenically unsaturated monomers in the form of aqueous dispersions or water-redispersible powders, one or more latent air pore formers selected from the group comprising aluminum and silicon and alloys thereof and calcium carbides and 30% to 95% by weight, based on the dry weight of the mineral expanding foam, of cement. The proportion of latent air pore formers is 10% by weight, based on the total weight of air pore formers and latent air pore formers

Spray dried homogeneous mixtures of a high molecular mass flocculating agent, a base polymer dispersion, and a protective colloid are useful for homogenously stabilizing mixtures such as dust, sand, and/or soil and produce a stabilized composition of high strength.

The present invention describes a hydraulic cement composition, process and use thereof, wherein the composition comprises a hydraulic cement composition with increased resistance against carbon dioxide (CO.sub.2) for application in reservoirs such as oil and gas and carbon capture and storage (CCS) wells; with improved performance of cement paste formulations as a material for application in primary, secondary cementing, recovery and/or plugging operations, of reservoirs/wells that operate with high CO.sub.2 content; as a technological alternative to guarantee the integrity of wells in CO.sub.2-rich environments for long periods of time, without any additional intervention to the already current operational procedures for cementing wells, and with cost reduction in relation to class G cement (currently, the main raw material); and sufficient chemical resistance to carry out enhanced oil (EOR) and gas (EGR) recovery by injecting high levels of CO.sub.2, increasing reservoir pressure throughout the extraction period of hydrocarbon reservoirs.

A method for the construction of a trafficway tunnel, a conduit shaft or a pressurized-water shaft by tubbing construction, wherein segment components are assembled in a machine-generated bore in the rock to form a closed lining in the form of a segment tube, and the annular gap between the bore and the outer wall of the segment tube is filled with a composition which includes polymerization-curing reactive resin and filler, where the filler, before or during conveying into the annular gap, is supplied with the polymerization-curing reactive resin, which is mixed with the filler and is dispersed therein, characterized in that the composition is cement-free and the filler includes a non-water-reactive inorganic material which has an average particle size500 m.

A grout composition for use in construction is disclosed. The grout composition includes a binder, a filler, a retarder, and a polymer. The binder includes calcium sulfate, the filler includes natural sand, the retarder includes modified amino acid, and the polymer includes vinyl acetate. The grout composition provides a shrink-free gap filler. Further, a method of preparing a grout is also disclosed. The method includes preparing the grout composition. The method further includes mixing the grout composition with a predetermined amount of water in a mixer for a predetermined amount of time to form grout having a predetermined consistency for a structural application.

A cement mixture for applying to a ceramic honeycomb body that includes: (i) inorganic ceramic particles; (ii) an inorganic binder; (iii) an organic binder containing a hydrophilic polymer and a hydrophilic additive comprising a polymer with a different composition than the composition of the hydrophilic polymer, the additive having a weight average molecular weight (M.sub.w) of at least 1,000,000 g/mol; and (iv) an aqueous liquid vehicle.

The present invention provides a method of colouring and surface treating the surface of a particulate material, such as a silica-based material like sand, where the method includes the steps of: a) optionally heating the particulate material to a temperature between 3 and 85 C.; b) preparing an aqueous dispersion of a colourant, an alkoxy silane, a silyl alkanoate, a polysiloxane, or a mixture of these; c0) optionally treating the particulate material c1) mixing the dispersion prepared in step b) with the particulate material of step a); c2) optionally adding an alkoxy silane, a silyl alkanoate, a polysiloxane, or a mixture of these; c3) heating the mixture to a temperature of between 2 and 80 C. for a period of 1 minute to 24 hours; and d) optionally mixing the treated sand formed in step c) with an aqueous dispersion of a colourant, an alkoxy silane, a silyl alkanoate, a polysiloxane, or a mixture of these. Steps a) (where used) and b) can be conducted simultaneously or sequentially in either order. At least one step includes the use of an alkoxy silane, a silyl alkanoate, and/or a polysiloxane. At least one step includes use of a colourant. The aqueous dispersion of step d) may be the same or different to that of step b). The invention further provides a coloured particulate material which is surface modified on at least one surface with a colourant and at least one of a silyl alkyl group or silyl alkenyl group. The material may be made by the method of the invention. The invention also provides filled moulding material comprising the coloured particulate filler material.

The invention relates to a potting paste composition for honeycomb reinforcement having improved fire retardancy characteristics. The potting paste composition comprises (a) a curable polymer; (b) a curing agent for the curable polymer; (c) a fire retardant comprising an ammonium polyphosphate in combination with an ingredient selected from the group consisting of metal hydroxides, expandable graphites, liquid phosphate esters, phosphorous organic compounds or salts thereof, and zeolites; and (d) a filler selected from the group consisting of polymeric microspheres, hollow glass microspheres, and thixotropic fillers; wherein the potting paste has an uncured density determined by the method according to EN ISO 1183 of not more than 0.7100 g/cm.sup.3, preferably of at most 0.680 g/cm.sup.3, more preferably of at most 0.673 g/cm.sup.3, still more preferably of at most 0.660 g/cm.sup.3, even more preferably of at most 0.658 g/cm.sup.3, yet more preferably of at most 0.653 g/cm.sup.3 and in particular of at most 0.620 g/cm.sup.3; and wherein the total content of the fire retardant is at least 5.0 wt.-%, preferably at least 10 wt.-%, more preferably at least 15 wt.-%, relative to the total weight of the potting paste composition.