Month: March 2012
Babylonian Temples
The name of the inventor of the brick will remain in history as no more and the names of inventors of all the usual, simple but fundamental things. Anyway, the man opened the properties of clay, this ancient building material. The oldest samples of baked clay were found in what is now Slovakia, and date back to the Paleolithic. The age of these samples – about 25 thousand years. Today the pottery is called a wide range of products, in baked clay.
Basic and most important of these products is a brick. For the construction of burnt brick was used from ancient times. This structure of Egypt and Mesopotamia, III-II millennium bc, and the architecture of Mesopotamia and Ancient Rome. Over time, instead of mud-brick was used more practical ceramic. According to Herodotus, in the vi century bc buildings of Babylon were richly and beautifully decorated with ceramic brick. Tiered Babylonian Temples got off with blue glazed brick.
Thanks to the brick began to develop complex architectural shapes: arches, vaults, etc Complicating the ornamentation and expressiveness of the brickwork. Sophisticated enough to remember and unique forms of Gothic architectural monuments of 12 century, producing a strong impression so far. In ancient Greece, as well as in the Byzantine brick called plinfy, and he had the dimensions 30 x 60 x 3.9 cm in 10 th century through the Byzantine brick appeared in ancient Russia. One of the first Russian brick buildings is considered to be Desiatynna Church (Kiev). Bricks for the building of temples are made at monasteries. Year 1475 marked the emergence of the first Russian brickworks. Dimensions plinfy could vary depending on need. In the 15 century. in Russia began to apply a "brick by Aristotle, which dimensions have looked more like modern. Standards of modern brick determined in the late 20's 20. and were 250 x 120 x 65 mm (so-called single). Brick industry has begun to develop since the mid 19 century, and today we have around 15 thousand combinations of shapes, colors and textures. Due to the development production of bricks, architecture can be an outstanding and unique appearance. Brick – a popular and practical material is present, it can be a different kind, full-and hollow, and perhaps artificial stone. Hyperpressed brick Litos – this is an artificial stone are in high demand due to their properties. This wonderful tile, and beautiful structural material. According to dictionary definition, bricks – clay brick. " However, modern brick has gone much further than this simple definition. Source: History of bricks
ARBs
DET-320 can used as a mini-power plants to provide electricity to small communities. The largest of the produced throughout the continent heavy bulldozer T-800 (T-75.01) working weight 106 tonnes, of which equipment has to 29.5 tons, is equipped with a 820-horsepower engine 6DM-21T with a turbocharged and intercooled. Hydromechanical transmission provides four forward gears and two – the rear and consists of a single-stage three-wheel torque converter, driveline, and module (three-shaft planetary gearbox and a rotation stop brake and a conical gear), hydraulic transmission, two-stage final drive with a pair of spur and planetary series. Disk clutches KP mechanisms rotation and stops the brakes are working in oil and require no adjustment. T-75.01 is designed to develop the most severe permafrost and rocky soils in the mining industry, to carry out large volumes of earthwork in road construction in various climatic conditions without carrying out blasting in overburden. Promtractor " (CHZPT) now offers three basic models of ARBs: T-25.01, T-35.01 and T 50.01 traction grades 25, 35 and 50, respectively. All machines are equipped with a planetary manual, three-point semi-rigid suspension with external oscillating axle trucks, which provides high traction properties and reduces shock loads on the undercarriage system. The first copies of the bulldozer T-25.01 were issued in 1985.
A few years later at its base were fabricated pipe-layer TG-321, and reclamation of TM-25.01. Repetitive production of T-25.01 only began in 1995. The bulldozer can be used in the industrial, oil & gas, hydraulic engineering, and mining for heavy earthmoving works, including the development of frozen and rocky ground.
Paints
If you go into any building store, then on the counter see a large assortment of acrylic paints, even in the line of one manufacturer. What – do they differ? Why are one manufacturer to produce several types of acrylic paint? The difference lies in the characteristics of the paint. Paint for painting the ceiling should have a snow-white color and good coverage, but this paint is absolutely no need to have good resistance to washing and can not be tinted in vibrant colors. Paint, intended to paint the walls in the bedrooms, will be more resistant to abrasion and can be otkolerovat in more colors. In addition, there are many highly specialized paints designed for painting surfaces on which there is grease, traces of smoke and nicotine. When painting walls with acrylic paints obtained noble matte finish, and if necessary to get coverage with a little gloss or necessary paint the walls with high wear and tear? For such tasks, there are latex paints. Latex paint.
Another product of the paint industry is a latex paint. Their main advantage over other water-based paints are: increased resistance to wet abrasion, the possibility of obtaining silk matte surfaces, and the ability to cover the base thinly. All this gives repair walls, producing color of the wallpaper before painting retain their texture. Why is it better suited for latex paint? The chemical composition of latex paints when dry form a thin film, which is capable of cover any surface structure. On this if bought wallpaper by painting or using textured plaster, paint is the best – latex paint, give it your desired color and surface texture will save.
Water Supply Pipe
March 27, 2012
General
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The first things usually start picking pipe water – their price. That is, the value of the material, of which the water supply pipe, installation of additional equipment and materials. All together it will be constitute the water system. What materials are made of water supply pipe? Steel pipes of water supply. Produced is usually of two types: non-galvanized and galvanized (black). Galvanized pipes are mainly for the installation of potable water pipes and hot water.
Galvanized pipes, in contrast to the black coated with zinc, which prevents them from corrosion in an aqueous medium. Industry produces non-galvanized and galvanized pipes random length (non-uniform in length) from 4 to 12 m and a cut length (all pipes of this party a certain length) from 4 to 8 m with an allowance for each cut to 5 mm and a maximum deviation over the whole length + 10 mm. K steel pipes supply the following requirements. Pipe surface must be flat and smooth, with no sag and crack. A small amount of oxide layers, minor dents and risks. In the suture zone may be a gently sloping thickening of the height not exceeding 0.5 mm.
On the surface of galvanized pipes should not be not covered with zinc sites, bubble zinc coating; allowed a small surface roughness, and the influx of zinc. Cast-iron pipes of water supply. Used for outdoor water pipe systems, pressure gravity sewer systems and inland waterways. Advantage – increased durability compared to steel and corrosion resistance.
construction and repair