Abstract:
A porous material made from sintered inorganic particles. It has an open pososity of 30% to 40% by volume, a permeability to water at 20.degree. ranging from 0.6 to 60 m.sup.3 /h.m.sup.2.bar for a wall thickness of 2 cm as the average pore diameter varies from 2 to 20 microns and a crushing resistance, measured under conditions of isostatic compression, of 4.times.10.sup.8 to 5.times.10.sup.8 N/m.sup.2.
Abstract:
Disclosed are solar-reflective building materials, including roofing articles, that include nanoparticle-containing thin films; such articles display high reflectance of near-infrared radiation and high transmission of radiation in the visible light range so as to reduce the heat island effects experienced by the articles while also maintaining an aesthetically pleasing appearance. Also disclosed are related methods of fabricating such articles.
Abstract:
This invention is directed to a lightweight concrete combination. The combination includes a lightweight concrete product having auxiliary structures, such as at least one fastener, embedded therein. The lightweight concrete product comprises (a) cement and (b) a lightweight additive material. The invention also relates to a method for using the lightweight concrete product, and to a method for producing the lightweight concrete combination.
Abstract:
A porous cordierite ceramic honeycomb article with increased mechanical strength and thermal shock resistance. The porous cordierite ceramic honeycomb article has MA 2660 wherein MA=3645 (IA)−106 (CTE)+19 (d90)+17 (% porosity), MT=4711 (IT)+116 (CTE)−26 (d90)−28 (% porosity), and a CTE≦9×10−7/° C. in at least one direction. A method of manufacturing is also disclosed wherein the inorganic raw material mixture contains talc, an alumina-forming source, a silica-forming source, and 0-18 wt. % of a kaolin or calcined kaolin containing not more than 8 wt. % of a fine kaolin source having a median particle diameter of less than 7 μm, wherein the fired porous ceramic cordierite honeycomb article has a porosity
Abstract translation:具有增加的机械强度和耐热冲击性的多孔堇青石陶瓷蜂窝制品。 多孔堇青石陶瓷蜂窝体制品具有M≠2220或其中M A = 3645(I < /(CTE)+19(d 90)+ 17(孔隙率%),M T T = 4711(℃) )+116(CTE)-26(d 90) - 28(%孔隙率),CTE <= 9×10 -7 /℃至少在一个方向 。 还公开了一种制造方法,其中无机原料混合物含有滑石,形成氧化铝的源,二氧化硅形成源和0-18wt。 %的高岭土或煅烧高岭土含有不超过8wt。 %的中值粒径小于7μm的细高岭土源,其中烧成的多孔陶瓷堇青石蜂窝体制品的孔隙率<54%。 或者,如果大于8wt。 使用%的细高岭土源,则从1200℃至1300℃的缓慢升温速率不超过20℃/小时。
Abstract:
An admixed and kneaded material of a mixture of a hydraulic powder, a potentially hydraulic powder, water, and fine and coarse aggregates, if necessary is molded and hardened. Then the hardened body is heat cured to form silicic acid anions of at least a trimer. This molded and hardened body has a compression strength at least 1000 kgf/cm.sup.2 and a bending strength of at least 150 kgf/cm.sup.2 so that hardened cement body having a high mechanical strength can be obtained without using a special reinforcing member or fiber. The hardened concrete product of this invention has a high bending strength, compression strength and modulus of elasticity. A glaze can be applied and fired to obtain beautiful concrete products.
Abstract:
A fire resistant article comprising at least about 65 wt. % gypsum dihydrate, reinforcing fibers disposed substantially homogeneously throughout said set gypsum dihydrate, inorganic binder, and optionally refractive filler. This composition provides superior resistance to damage when subjected to a stream of pressurized water as from a fire hose.
Abstract:
A slurry containing a precursor fiber convertible to carbon fiber and/or a carbon fiber and, based on 100 parts by weight of the fiber, 10 to 300 parts by weight of a thermosetting resin, e.g. phenol resin, is processed into a random web. This web may contain a pitch or an organic granular material. The web is hot-pressed between a pair of belts while curing of the resin is inhibited to prepare a prepreg sheet. This sheet is disposed, leaving a clearance, in a mold having ribs on a molding surface and heated over the melting point of the resin for expansion and complete cure to provide a porous composite sheet equipped with grooves. This porous composite sheet is carbonized or graphitized to produce a porous carbonaceous material for use as a fuel cell electrode material and so on. This porous carbonaceous material has high homogeneity, gas permeability, electrical conductivity, heat conductivity and mechanical strength.
Abstract:
Concrete compositions are provided which contain particulate rubber, preferably recycled rubber from such sources as automobile tires, in amounts between about 0.05 and about 20 percent by weight of the concrete composition. The concrete compositions further contain portland cement, water, and an aggregate material. Additional materials such as superplasticizers and fly ash can also be admixed with the concrete compositions.