Brick and Concrete Paints

The use of inorganic binding materials and components based on organic binding acrylic, predominantly as dispersions in water or dissolved in organic solvents, led to first-generation brick and concrete paints. The main drawback of these coatings is comparatively short service life. 

Silor-F, a brick and concrete paint of the third generation, displays a major difference from other paints in not only forming attractive and strong films on building facades but also impregnating into concrete, wood, plaster, brick, etc., wall materials and interacting chemically with the material, eliminating the boundary layer between wall surface and paint layer. 

Certification tests undertaken by the Construction, Architecture and Geodesy University of Sofia, Bulgaria and NIIZhB of Moscow, Russia showed that concrete strength after application of the paints is increased 3—8 times under fluctuating and vibration loads. Increase in wall surface strength is of the most value when softening of the 

The paint is available in several modifications. Painted surfaces may be matt or glossy, hydrophobic or hydrophilic impregnated wall surface layers may be porous or smooth. Gloss painting onto a smooth impregnated wall may be used when a wall is in contact with water or splashes water absorption will be zero. Matt hydrophobic paint prevents the infiltration of walls by salts, offers rain resistance and a permanent fresh appearance, and at the same time provides no obstacle for water vapor to penetrate the wall when outer-layer pores are not filled with paint and their surface is not hydrophobicized. Hydrophilic paint accelerates drying of the wall in damp or wet room interiors. 

The paint consists of two components. After the components are mixed the solution may last for several days, which allows the paint to be applied onto surfaces by any conventional means. 

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Lead is relatively easily corroded where acetic acid fumes are present and under such conditions it either should not be used or should be efficiently protected. Generally, any contact between lead and organic material containing or developing acids will cause corrosion for instance, unseasoned wood may be detrimental. Trouble from this cause may be prevented by using well-seasoned timber, by maintaining dry conditions, or by separating the lead from the timber by bitumen felt or paint. Lead is also subject to attack by lime and particularly by Portland cement, mortar and concrete, but can be protected by a heavy coat of bitumen. A lead damp-proof course laid without protection in the mortar joint of a brick wall may become severely corroded, especially where the brickwork is in an exposed condition and is excessively damp. 

Like the natural iron oxide pigments, the synthetics are used for colouring concrete, bitumen, asphalt, tiles, bricks, ceramics and glass. They are also used extensively in house and marine paints. Because the shapes of the particles can be accurately controlled and the particle size distribution is narrow, synthetic iron oxides have a greater tinting strength than the natural ones and so, are chosen where paint colour is important, i. e., for top coats. Red iron oxides are used in primers for automobiles and steel structures. 

Uses. The most important areas of use of pigments are paints, varnishes, plastics, artists colors, printing inks for paper and textiles, leather decoration, building materials (cement, renderings, concrete bricks and tiles—mostly based on iron oxide and chromium oxide pigments), leather imitates, floor coverings, rubber, paper, cosmetics, ceramic glazes, and enamels. 

Use Nonvolatile bonding agent for pigments weatherproofing paints for protecting concrete, stone, brick, and plastic surfaces. 

Pa.ints, Paints (qv) prepared from poly(vinyl acetate) and its copolymers form flexible, durable films with good adhesion to clean surfaces, including wood, plaster, concrete, stone, brick, cinder blocks, asbestos board, asphalt, tar paper, wahboards, aluminum, and galvani2ed iron (147). Adherence is also good on painted surfaces if the surfaces are free from dirt, grease, and mst. Developments in emulsion polymeri2ation for paint latices have been reviewed (148). 

FIG. 5-12 Variation of absorptivity with temperature of radiation source. (1) Slate composition roofing. (2) Linoleum, red brown. (3) Asbestos slate. (4) Soft rubber, gray. (5) Concrete. (6) Porcelain. (7) Vitreous enamel, white. (8) Red brick. (9) Cork. (10) White dutch tile. (11) White chamotte. (12) MgO, evaporated. (13) Anodized aluminum. (14) Aluminum paint. (15) Polished aluminum. (16) Graphite. The two dashed lines bound the limits of data on gray paving brick, asbestos paper, wood, various cloths, plaster of parts, lithopone, and paper. To convert degrees Ranldne to kelvins, multiply by (5.556)(10 ). 

Horizontal cylindrical tanks should be installed on brick or reinforced concrete cradles with a downward slope of 1 in 50 from the draw-off end towards the drain valve, as shown in Figure 18.1. Cradles should be constructed on foundations adequate for the load being supported and the type of soil. A reinforced concrete raft equal to the plan area of the tank, and of adequate thickness to bear the load, is normally suitable for all but the weakest soils. Cradles should not be placed under joints or seams of the tank plates and a layer of bituminized felt should be interposed between the cradle and tank. The height of the tank supports should provide at least 450 mm space between the drain valve and ground level to allow access for painting or draining the tank. 

Chem. Descrip. Methyl slllconate In water Uses Water repellent, hydrophobic sealer for low-fired clay prods, (roof tiles, facing bricks, flower pots), aerated concrete, post-treatment of gypsum boards, light fillers such as perlite, vermicullte, and aerated concrete granules additive to whitewash and water-based paints, primer for emulsion paints and plasters Features Water-based VOC compliant Properties Colorless to yel. sp.gr. 1.29 pH = 13 42% solids Environmental Environmentally friendly... 

Masonry coatings are applied to concrete, brick, stone and tile, and can include similar materials, such as traffic marking paints. The primary reasons for coating masonry are to prevent the deterioration of the surface, to block the passage of moisture through the masonry, and to improve its appearance. Typical masonry coatings must be resistant to alkalies and alkaline environments, since many masonry substrates contain lime and water-soluble alkaline salts. 

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