摘要:
A fiber reinforced cement composition comprising the following raw materials: not less than 25% by mass and not more than 45% by mass of a hydraulic inorganic material; not less than 50% by mass and not more than 65% by mass of a siliceous material; not less than 5% by mass and not more than 12% by mass of woody reinforcement; not less than 0.25% by mass and not more than 1.5% by mass of a water soluble resin, wherein the hydraulic inorganic material is a Portland cement, the siliceous material is an amorphous material selected from the group consisting of fly ash, silica fume, blast furnace slag, perlite powder, glass powder, and mixtures thereof; the woody reinforcement is needle-leaves-tree unbleached kraft pulp and/or needle-leaves-tree bleached kraft pulp and used newspaper, and the water soluble resin is a polyvinyl alcohol resin.
摘要:
Improved methods for the production of lightweight, rigid, insulative perlite/cement solid articles such as bricks (62) are provided wherein expanded perlite is first treated with a cement binder followed by application of cement with subsequent mixing and forming. In preferred forms, a continuous belt (12) is provided with laterally spaced apart stations (22-28) for application of perlite, binder, water and Portland cement, respectively, onto the belt (12); these materials are then mixed in a drum mixer (38) to produce a mixture (61) which is poured into a frame assembly (44) for final curing/hardening.
摘要:
This invention relates to a process of a lightweight, heat insulating, high compressive strength, water insoluble material by heat treatment at temperatures between 650-950° C., possessing a low bulk density (from 300 to 800 kg/m3) and improved heat insulating capacity (λ=0.07 to 0.25 W/m·deg.) when it has been used to form an article having a compressive strength of from 0.49 to 5.59 Mpa. The starting chemical composition comprising more than 90% by weight of either perlite, pumice or pumice related group of materials or mixture of them and an additive in quantities less than 10% by weight containing Na2O and B2O3.
摘要:
Wallboard joint compound compositions comprising water, calcium carbonate, a polyether siloxane copolymer, and a styrene-butadiene polymer are disclosed. The joint compound compositions display significantly reduced cratering, reduced shrinking, greater sag resistance, and excellent workability.
摘要:
Expanded perlite products having controlled particle size distribution, methods of producing the expanded perlite products, and methods of use thereof are provided. The expanded perlite product has, for example, a low ratio of standard deviation of particle size distribution to median particle size (for example, less than 0.63) and low median particle size (for example, less than 50 microns). The expanded perlite product may be used in a variety of applications including filter applications.
摘要:
An improved material for use in resilient conforming pads, cushions, impact resistance padding and the like is described. The material comprises a liquid or semi-solid matrix phase and an expanded Perlite included phase. The material is useful for providing low weight contour conforming resilient padding for garments, athletic equipment, prosthetic devices, surgical, medical or vehicular cushions, positioning devices, mattresses, impact protective padding and the like.
摘要:
The present invention describes an improved building material composition, useful for example as a fire door core and to improved methods of making this composition. The building material of the present invention consists essentially of expanded perlite, a fireproof binder, clay or vermiculite, and optionally diatomaceous earth, one or more viscosity-enhancing components, reinforcement fibers, and a plasticizer or mixtures thereof. The method of making this improved composition is a semi-continuous batch press method wherein at least the expanded perlite, fireproof binder, and clay or vermiculite are mixed; the mixture compressed in a mold, and the compressed mixture dried.
摘要:
A single ply membrane roofing system includes a roofing insulation board which, preferably, is at least 45% by dry weight expanded perlite. One major surface of the insulation board is coated with a latex coating comprising, by dry weight, between 48.3% and 96% clay; between 3.1% and 33.3% latex; and between 0% and 34% sodium silicate. A single ply roofing membrane is adhered to the coated major surface of the insulation board with a roofing contact adhesive.
摘要:
The present light-weight material contains expanded perlite, alkali silicates and optionally added hardeners for aqueous alkali silicates, wherein said expanded perlite has a grain of from 0.8 to 6 mm, a hydrophobizing agent is present, the bulk densities are in the range of from 60 to 500 kg/m3.
摘要:
The present invention provides light weight high temperature well cement compositions and methods. The compositions are basically comprised of calcium aluminate, ASTM class F fly ash and water.