subject: Expert Analysis: Dry Stone Macular, Rust How To Deal With - Stone, Granite, Hanging Stone - Building [print this page] 1, the first analysis to understand Stone Lithologic and physical characteristics of their own
Care is targeted at a variety of stone, each stone has its own rock and mineral characteristics, chemical and physical characteristics. Nothing more than stone igneous rock properties, sedimentary, and metamorphic rocks in three categories. Into the chemical compositions of carbonate and silicate two categories.
Silicate rocks, such as Granite , Diabase (gabbro), syenite, angular rocks, carbonate rocks such as marble, limestone, travertine and so on. Understanding of rock properties can master stone rock mineral and chemical composition, and thus determine the type of stone weathering ability and resistance to chemicals prone to illness. Grasp the structure of the rock structures and physical properties that can determine the physical weathering ability of anti-stone to guide the correct application of stone.
Second, analysis of various phenomena and mechanism of disease
. Modern stone applications in the chemical pollution mainly for water spots, rust, efflorescence, discoloration, organic matter pollution.
The actual appearance of rust of iron in the rock composition is the result of oxidation. Rock iron to divalent iron are generally present, but ferrous iron is unstable, and react with oxygen in the air, turned into trivalent iron to form iron oxide.
Stone discoloration occurred mainly in the chemical stability of the poor stone varieties, will appear during the installation process gradually turn yellow stone walls from top to bottom, over time, the whole wall completely yellow. Travertine backward in their chemical stability, the air of carbon dioxide, sulfur dioxide, nitrogen oxides and lime will react with calcium oxide in central China, in particular the generation of sulfide must be white, yellow stone. Again, the construction process Paint And adhesives contain a large amount of volatile matter, these volatile components will react with the stone, on stone with poor chemical stability of such an impact.
Efflorescence phenomenon in stone after the wet paste to install more. Source of alkaline material actually came from the bonding material, if the construction process by hanging pan base will not appear the same, hanging process water spots will not occur.
Stone hanging in the main advantages: First, to improve the safety and durability, can effectively avoid the wet paste process appears Plate Void, crack, fall off and so on; the second is to keep walls clean and beautiful, avoid white, color and so on; third is to improve the working condition, and reduce the labor intensity, speed up Project Progress. From the material point of view, decorative stone material is critical to ensure quality of the project, in addition to stone, the main steel (aluminum) frame material, siding, hook, structure Glue And sealing glue, such as weathering. The use of aluminum, steel and other sections, must meet state specifications. Aluminum surface of the plating layer must be above the national AAA5-level requirements must be hot dip galvanized steel or other corrosion materials processing, in order to ensure rust does not occur. Hanging panel must be used to connect more than 3 mm stainless Plate Or 4 mm or more of aluminum. And widely used than glass curtain wall, stone curtain wall of security is even higher. And the use of structural adhesive fixed glass curtain wall, compared with metal components connected to a solid than stone.
Dry hanging stone solution to the problem: First, protection for stone processing factory. Natural stone is a mineral, coarse pores within the various sources of pollution such as water, acid, oil, etc. which will penetrate the formation of "disease", so it should be in stone before leaving the factory specification sheet brushing stone repellant, preferably permeability The protective agent (Dow Corning protectants have good permeability), forming a protective barrier to prevent the pollution of alien infiltration within the stone and the bottom to prevent seepage of pollution to achieve the stone to keep the original appearance, extending the service life of stone purpose. Second, the later stone maintenance is also important. In order to maintain the beautiful stone, careful maintenance is necessary, which includes daily cleaning, contamination removal and polishing grinding three.
Daily cleaning with water or some neutral cleaning agent, after cleaning the surface must be dry to avoid residual water pollution.
