摘要:
Provided is a method for cementing. The method comprises providing a glass bead suspension comprising water, a synthetic hectorite, and glass beads. The method further comprises mixing the glass bead suspension with components comprising cement and additional water to form a cement composition. The method additionally comprises allowing the cement composition to set.
摘要:
A colored cementitious composition is provided that is composed of hydraulic cement and a liquid coloring suspension. The liquid coloring suspension for cementitious compositions contains polycarboxylate dispersant, pigment, and a polysaccharide thixotropic additive. The liquid coloring suspension has improved viscosity consistency, improved shelf-life, anti- settling and anti- sludging properties, and decreased polycarboxylate dispersant requirements.
摘要:
An improved concrete is provided having a concrete formed from a wet concrete mixture; and a non-chemical admix added to the wet concrete mixture and configured to contain bubbles in order to control the amount of entrained air formed in the concrete when the wet concrete mixture cures into the improved concrete. The non-chemical admix includes a multiplicity of hollow objects, bodies, elements or structures, each configured with a respective cavity, unfilled space, or hole to trap and maintain a bubble inside. The hollow objects, bodies, elements or structures include hollow cylinders, or spheres, or capillary tubes, or some combination thereof. Each hollow object, body, element or structure is configured with a dimension so as not to absorb liquid, including water, including where the dimension is in a range of about 20-30 microns, and is made of glass or a glass-like material.
摘要:
A lightweight structural concrete with screw-ability and nail-ability similar to wood-is composed of a non-structural and ultra lightweight aggregate such as expanded perlite or a combination of expanded perlite and polystyrene beads of a particular size distribution and volume amount, entrained air cells of another specific size distribution and volume amount, and dense cementitious composition of a cement binder, a fine grade structural filler no larger than concrete sand grade, a pozzolan, and optional micro-fibers for reinforcement. This structural concrete matrix is optimized to hold 13 gauge T-nails and bugle head wood screws with thread ranging from 8 to 11 threads per inch and diameter of 0.10" to 0.137". The resulting concrete will have consistent screw-ability and nail-ability similar to that of wood.
摘要:
Die vorliegende Erfindung betrifft die Verwendung von polymeren Mikropartikeln mit porösen und/oder hydrophilen Schalen in hydraulisch abbindenden Baustoffgemischen zur Verbesserung von deren Frost- bzw. Frost-Tauwechsel- Beständigkeit.
摘要:
An improved freeze-thaw durability cementitious composition is provided that uses' at least partially degradable polymeric particles that are blended directly into the cementitious composition mixture . The degradable polymeric particles provide void spaces in the cementitious material matrix, and such void spaces act to increase freeze-thaw durability of the cementitious material . Preferred polymers are polylactic PLA or polyglycolic PLG acid.
摘要:
This invention relates to a method of forming a synthetic hollow microsphere comprising the steps of preparing an agglomerate precursor, said agglomerate precursor including a primary component and a blowing agent; and firing the precursor at a predetermined temperature profile sufficient to seal the surface of the precursor and activate the blowing agent thereby forming a synthetic hollow microsphere, wherein the primary component comprises at least one aluminosilicate material. Synthetic hollow microspheres made by this method and uses thereof are also described.
摘要:
The invention relates to a method for producing a highly-porous, ceramic layer and for applying said layer on metallic, ceramic, enamelled and/or glass substrates, by using porous, ceramic particles, preferably aluminium oxide, titanium oxide and zirconium oxide, as well as an inorganic binder system. Said inorganic binder system contains at least one ceramic nanoparticle having a particle size below 100 nm, preferably below 50 nm and ideally below 25 nm, water being used as a solvent. Layers so produced are suitable for self-cleaning catalytically-active layers, for example, in baking ovens, internal combustion engines etc. and, generally, for the coating of substrates, in order to drastically increase the specific surface thereof, for example for catalyst supports.