31 results about "Asbestos cement" patented technology

The invention relates to a method used for rapid evaluation of priming paint performance. The method comprises following steps: the surface of an asbestos cement plate and the surface of a fiber reinforced cement middle density flat board are coated with a priming paint to be tested respectively; the asbestos cement plate and the fiber reinforced cement middle density flat board are subjected to water permeability test, adhesion test, alkali burnout resistance test, and alkali burnout resistance and salting-out resistance test; if the water permeability, adhesive force, the alkali burnout resistance of inner wall priming paint, or alkali burnout resistance and salting-out resistance of outer priming paint are all qualified, the priming paint is qualified; if one parameter selected from the water permeability, adhesive force, the alkali burnout resistance of inner wall priming paint, or alkali burnout resistance and salting-out resistance of outer priming paint is not qualified, the priming paint is unqualified.

The invention discloses a novel silencer for an engine. The novel silencer comprises a cavity, an outer shell, an inner wall, glass fiber cotton, an air inlet pipe, a damping hole plate, a first cavity, a first partition, a center partition, a second cavity, an air guiding pipe, a micro perforated plate, wave crest sound absorption sponge, a second partition, a third cavity, a porous expansion perlite layer, a closed hole type foam plastic layer, a porous asbestos cement plate layer, an air outlet pipe, micro through holes and micro small holes. The cavity comprises the outer shell and the inner wall. The cavity is internally provided with the damping hole plate, the first partition, the second partition, the first cavity, the second cavity and the third cavity. According to the novel silencer for the engine, simplicity of the noise reduction theory and method adopted by existing noise reduction equipment is changed, the beneficial effects of damping noise reduction, resistance noise reduction, micro perforated plate noise reduction and small hole noise reduction are integrated, the low frequency sound wave, the intermediate frequency sound wave, the high frequency sound wave and the ultrahigh frequency sound wave in noise can be effectively absorbed, pollution caused by noise is reduced to the maximum degree, and the health of the human body is protected.

Equipment, process and techniques are shown for rehabilitating old underground pipelines, particularly asbestos pipelines, in which an old underground pipeline is replaced, as by drawing a bursting head through the old pipe to burst it and simultaneously pulling a new pipe through behind the bursting head. The invention has particular applicability to the rehabilitation of old asbestos pipelines in which the burst up debris must be contained or encapsulated in some manner. The macro-encapsulation materials shown form an in-situ layer of a temporarily fluid macro-encapsulating material which absorbs and immobilizes asbestos fibers and pipe fragments, the macro-encapsulating material being applied simultaneously as the pipe bursting operation proceeds.

The present invention discloses a kind of coated metal-imitating wall decorating plate and its production process. Foamed polystyrene plate is adhered with asbestos cement plate to form composite plate, and the periphery of the composite plate is coated and fixed by adhesive, and the outside surface and lateral surfaces are coated successively with putty layer, closing primer layer, intermediate paint layer and facing paint layer to form the decoration plate product. The decoration plate has low cost and simple operation, and is suitable for industrial production.

The invention discloses a post-planting installation method for a rubber waterstop. In the method, a groove is made at the position where the rubber waterstop is installed, and the rubber waterstop is cut according to the sum of the lengths of the installation grooves plus a lap length of 300 mm, and the The end of the rubber water stop is thermally connected after treatment; the installation groove is painted with thick cement slurry, and the rubber water stop is pushed into the installation groove with the erected mounting bracket; asbestos cement is prepared and stuffed into the installation groove of the rubber water stop. On both sides, use special tools to tap the asbestos cement until the surface is flat and dense; moisturizing and curing the asbestos cement, remove the mounting bracket after curing, and complete the post-planting installation of the rubber waterstop. The method overcomes the defects of traditional rubber waterstop installation, has simple operation, convenient material acquisition, firm and reliable rubber waterstop after planting, good use effect and strong durability, and effectively solves the leakage problem of the installation of the rubber waterstop .

Asbestos cement one-time formless construction method, including: 1. Use asbestos cement to make the outer wall of the wall component, fill the insulation material to make the inner wall, and finally decorate the outer decorative surface of the outer wall; 2. Use asbestos cement Make the outer surface of the column and beam components, and then decorate the decorative surface of the outer surface of the column and beam components; 3. Make floor panels with asbestos cement; 4. Make the above-mentioned walls, column beams and floors processed by the factory The panel components are transported to the construction site for combined installation, and finally the reinforced concrete pouring of the floor panels, columns and beam components is completed. The invention cancels the templates used in traditional building methods, and the procedures of plastering and making exterior decoration surfaces, and the walls, columns, beams, and panels can all be produced in factories, and only need to be combined during construction. The process is less, the structure is simple, the construction period is short, it meets the requirements of environmental protection, and the thermal insulation performance is good, and the construction cost is also low.

The invention discloses a novel connecting method for pipelines with different pipe diameters and made of materials. The novel connecting method is characterized by comprising the following steps that firstly, a blocking plate with the thickness of 2 m is arranged at the position, 5 m away from a water return branch hole, in the water return branch hole, the blocking plate, a connecting pipe made of concrete and branch hole linings at the position of the water return branch hole are poured at a time, no construction seam is reserved, during blocking plate pouring, rigid waterproof casing pipes are buried in the position, at the end of a connecting steel pipe, in the middle portion of the blocking plate, and due to the fact that the waterproof casing pipes are provided with wing rings, it can be ensured that the rigid waterproof casing pipes and the blocking plate are closely combined without water leakage; and secondly, a section of phi 630 steel pipe with a flange is installed at the end of the steel pipe in advance, the length of the phi 630 steel pipe is 300 mm, and sealing water preventing is conducted between the steel pipe and the casing pipes through baffle rings, batched jute and asbestos cement. By means of the novel connecting method, pipeline cracks, caused by differential settlement between a mountain and a soil layer, at the positions of the mountain and a dredging tank are avoided, the dredging work of the dredging tank is avoided, the labor force is saved, leakage of sewage containing toxic metal is prevented, and safety is high.