Abstract:
A non-magnetic concrete structure having no magnetism or a very small magnetic permeability without reinforcing steel bars arranged, a sidewall for a guideway, and a method for installing the sidewall for the guideway are provided.The reinforcing steel bars-free sidewall 11 for the guideway 10 is constructed by using a non-magnetic concrete structure constructed by using a fiber-reinforced cement-based mixed material and having no reinforcing steel bars therein. The fiber-reinforced cement-based mixed material is produced by mixing non-metallic fibers or non-magnetic metal fibers into a cement-based matrix in a mixing amount of 1 to 4% for an entire volume of the cement-based matrix. The cement-based matrix is obtained by mixing a composition with water. The above composition is composed of cement, aggregate grains having a maximum grain diameter of not more than 2.5 mm, pozzolanic reaction particles having particle diameters of not more than 15 μm and supper plasticizer. The fiber-reinforced cement-based mixed material has mechanical properties: a compressive strength of not less than 150 N/mm2 and a tensile strength of not less than 5 N/mm2.
Abstract:
Building materials containing copolymers derived from vinyl ester, (meth)acrylic ester and optionally ethylene comonomers, stabilized with a polyvinylalcohol protective colloid, as their aqueous dispersions or as redispersible polymer powders which are redispersible in water, exhibit improved processing properties and set properties. The copolymers are obtained by emulsion or suspension copolymerization in an at least two step process wherein a) the vinyl ester component is polymerized, optionally with ethylene and further copolymerizable comonomers, to a conversion of from 90 to 100% by weight in a first step, and b) the ester(s) of (meth)acrylic acid are subsequently added and polymerized in a second step. The copolymer dispersion obtained may be dried to form a redispersible copolymer powder.
Abstract:
The present invention is embodied in a ceramic foam made by mixing a liquid pre-ceramic resin and a liquid phenolic resin, allowing the resultant mixture to chemically foam, curing the mixture for a time and at a temperature sufficiently to convert the mixture to a polymeric foam, and then heating the resultant polymeric foam for a time and at a temperature sufficient to break-down polymers of the polymeric foam and convert the polymeric foam to a ceramic foam. The ceramic foam of the present invention contains residual decomposed components of the liquid phenolic resin and/or liquid pre-ceramic resin.
Abstract:
This invention relates to a process for preparing ceramic-like materials with specific properties by binding an inorganic filler in the form of a dry composition with a grain size of up to 25 .mu.m containing in the volume ratio 1:0.-1.52 a waste phosphogypsum and magnetite or glass-forming oxides, with an unsaturated polyester resin in an amount of 46-220 volume parts per 100 volume parts of the filler. The use of magnetite makes it poisible to prepare materials with magnetic properties, while glass-foming oxides enable preparing materials effective to absorb an X-radiation of 45-55 keV and a hard radiation of 0.6-125 MeV. When an expanding agent is added to the raw composition according to this invention, an expanded material is obtained, having completely closed pores, particularly useful in the building industry. The resultant ceramic-like materials are characterized by good adhesion to metals, plastics, glass, wood, concrete and can be easily joined with them both at the stage of polymerization and after its termination by using a prepolymerized resin as a binder.
Abstract:
The present invention provides a water-based lime dispersion paint comprising a binder, a pulverulent, and one or more adjuvants. The binder comprises a film-forming copolymer of an alkyl acrylate monomer and a nonionic ethylenic monomer. The copolymer is dispersed in an aqueous medium and the dispersion is stable at a basic pH. The nonionic ethylenic monomer is capable of forming a homopolymer having a glass transition temperature in the range of 70.degree. C. to 170.degree. C. The pulverulent material comprises one or more pigments and airy slaked lime having a low hydraulicity index. The adjuvants are stable at a basic pH and include D-sorbitol as a stabilizer.
Abstract:
A method of manufacturing environmentally friendly interior and exterior building materials, includes: preparing agricultural waste of a lignocellulose-containing herbaceous plant; and subjecting the agricultural waste to immersion treatment using a functional immersion solution prepared by mixing purified water, an organic acid or an alkali salt thereof, and a composite natural extract and stirring the mixture.
Abstract:
The present invention relates to porous structures embedded with nanoparticles, methods of forming the structures, and methods of using the structures. In most general form, the invention relates to porous materials embedded with nanoparticles having characteristics, such as magnetic, enabling to align or arrange the nanoparticles in the material by exposure, e.g. to a magnetic field. Therefore, a method according to the invention provides manufacturing materials having variable magnetic and electromagnetic properties which can be adapted during manufacture for various applications, such as electromagnetic wave absorbers, lens, concentrators, etc.
Abstract:
Magnetic receptive Paints and coatings have been developed to allow one to paint a wall with this coating and apply magnets to this surface. The further development of magnetic receptive compounds lends itself to creating a one step process where one applies a magnetic receptive plaster or compound to a wall with a viscosity sufficient to smooth with a trowel leaving a magnetic receptive surface. In other applications one could spray a compound on a given surface.
Abstract:
A non-magnetic concrete structure having no magnetism or a very small magnetic permeability without reinforcing steel bars arranged, a sidewall for a guideway, and a method for installing the sidewall for the guideway are provided. The reinforcing steel bars-free sidewall 11 for the guideway 10 is constructed by using a non-magnetic concrete structure constructed by using a fiber-reinforced cement-based mixed material and having no reinforcing steel bars therein. The fiber-reinforced cement-based mixed material is produced by mixing non-metallic fibers or non-magnetic metal fibers into a cement-based matrix in a mixing amount of 1 to 4% for an entire volume of the cement-based matrix. The cement-based matrix is obtained by mixing a composition with water. The above composition is composed of cement, aggregate grains having a maximum grain diameter of not more than 2.5 mm, pozzolanic reaction particles having particle diameters of not more than 15 μm and supper plasticizer. The fiber-reinforced cement-based mixed material has mechanical properties: a compressive strength of not less than 150 N/mm2 and a tensile strength of not less than 5 N/mm2.
Abstract translation:提供了一种无磁性的非磁性混凝土结构,或者没有设置加强钢筋的非常小的磁导率,用于导轨的侧壁和用于安装导轨侧壁的方法。 用于导轨10的加强钢筋无侧壁11通过使用通过使用纤维增强的水泥基混合材料并且在其中不具有加强钢筋的非磁性混凝土结构构成。 纤维增强水泥基混合材料是通过将非金属纤维或非磁性金属纤维混合到基于水泥的基体中,混合量为1至4%,用于整个体积的水泥基基体。 通过将组合物与水混合获得水泥基基质。 上述组合物由水泥,最大粒径不大于2.5mm的骨料组成,粒径不大于15μm的火山灰反应颗粒和超级增塑剂组成。 纤维增强水泥基混合材料具有机械性能:抗压强度不小于150N / mm 2,拉伸强度不小于5N / mm 2, SUP>。
Abstract:
A method of hardening a fluid mass in contact with a wall, in a desirable shape. According to the invention, the fluid mass is a magneto-rheological fluid mixture that in addition to at least one hardening component comprises a particulate magnetic component, with minimally 80% of said particles having a particle size of at least 0.0005 mm, and a magnetic field is applied for a length of time that suffices to achieve the desired strength by hardening in the absence of a magnetic field.