Assignment 228

Table of contents Abstract………………………………………………………………………………….4 Marble…………………………………………………………………………………….5 References………………………………………………………………………………….8

Abstract

The mutation creates a flexible reuse of rare carbonate grains. The result is that the stone is usually made of a combination of carbonate gemstones. The clarity of the marble makes it very attractive to other types of models. This allows attractive marble pieces to be cut, cleaned, and used as floor tiles, building boards, stone countertops, window layers, footpaths, sections, and many different living stone tools. Marble consists primarily of calcium carbonate (CaCo3) with a low silica, magnesium carbonate, aluminum oxide and iron oxide content. Since the ancient time, marble has been extracted from the APuan Alps, where Carrara has been accredited for its high-quality white marble was used to construct the most attractive monument in Rome. Initially, the extraction work was being done manually by the workforce who were mainly the slaves. They used fig wood wedges, which they inserted and inflated with water, so they the marble block could be detached due to natural expansion of the wood wedges.The helical wire, which was made of a continuous tensioned steel, which formed a loop, was made to move at a speed of about 5m to 6m per second, cutting the marble at as peed of about 20cm/hr. the adoption of this technique completely replace the use of explosives which was doing much harm to workers health.

The machine is positioned in such a way that it keeps the cable tensioned until the end of the cutting process. This is the technique which is widely used as it gives room for calibration and makes it easy to rework the blocks with sharp edge. The standards which are related to marbles are, ASTM C503, Standard Specification for Marble Dimension Stone .

Mable and its structure

Marble is a stone due to the conversion of sedimentary carbonate rocks, the worst rock of limestone or dolomite(Yang, XU et al. 2007). The mutation creates a flexible reuse of rare carbonate grains. The result is that the stone is usually made of a combination of carbonate gemstones. Key geographical features and structures of carbonate rock (protolith) rock regularly modified or crushed. A photo of marble rock is shown in the figure below.

Fig: Marble rock (Tang, Sun et al. 2019).

Marble is a granular flexible rock, found in limestone or dolomite and contains a large number of interlocking elements of calcite or mineral dolomite. Its type in which limestone is coated elsewhere below the earth's surface is expressed by heat and weight from the thicker layers of the upper layer(Qiu, Feng et al. 2010). It can be similarly fenced off due to a change in communication close to the molten interference. Limestone rock contamination can also be suspended during the transition, bringing the mineral contamination of marble, usually graphite, pyrite, quartz, mica, and iron oxides. With sufficient numbers, this can affect the surface and the shade of the marble.

Properties of marble

· Color: White, pink

· Content: Limestone, dolomite

· Grain size - medium grain; can detect calcite values ​​that meet with the unaided eye

· Hardness - hard, though half of the minerals are weak (calcite is 3 by Moh hardness size)

· Structure: Massive

· Group: Metamorphic Rocks

· Texture: Granoblastic, granular.

· Formation: Regional or dynamic communication

· Acidic Reaction: As it is made of calcium carbonate, marble will react with a combination of acids, killing what is destructive. It’s one of the best destructive measurements. It is frequently trampled and used for damaging balance in streams, lakes and soils.

· Hardness: Made of calcite, marble has a third hardness on the Mohs hardness scale. As such, it is not difficult to cut, and that makes it useful to bring models and articles. The clarity of the marble makes it very attractive to other types of models.

· Polish Adherence Strength: After sanding with abrasives that proceed better, it can be cleaned into a high gloss. This allows attractive marble pieces to be cut, cleaned, and used as floor tiles, building boards, stone countertops, window layers, footpaths, sections, and many different living stone tools.

· The most important mineral in Marble: Calcite

· Additional Marble Minerals: Diopside, tremolite, actinolite, dolomite

Chemical composition:

Marble consist of mostly Calcium Carbonate (CaCo3) with some few content of silica, magnesium carbonate, Aluminum oxide and Iron oxide(Servet, Nazmi et al. 2014).

How marble has been extracted

Since the ancient time, marble has been extracted from the APuan Alps, where Carrara has been accredited for its high-quality white marble was used to construct the most attractive monument in Rome (Philippe 2019). Initially, the extraction work was being done manually by the workforce who were mainly the slaves. They used fig wood wedges, which they inserted and inflated with water, so they the marble block could be detached due to natural expansion of the wood wedges.

With time they advanced to using the black powder which somehow was not a good alternative as the black powder had impact on the health of the workers, this was during the 18th century and in 19th century, the real revolution in the field of marble extraction came with the invention of the helical wire and the penetrating pulley. This technique involved use of a 4 to 6mm diameter steel wire in conjunction with the abrasive action of the sand (silica sand) and water which was used a lubricant. The helical wire, which was made of a continuous tensioned steel, which formed a loop, was made to move at a speed of about 5m to 6m per second, cutting the marble at as peed of about 20cm/hr. the adoption of this technique completely replace the use of explosives which was doing much harm to workers health.

In 1950, a new invention came in, the use of diamond wire sawing which is still being used in industries(Özkan, Sarıışık et al. 2015). Diamond wire sawing is applied by first drilling two perpendicular holes which meet s the required size of the block to be cut. Another machine which is placed on the rails is then used to rotate the cable/wire. As it turns, the cable saws the rock as per the required size. The machine is positioned in such a way that it keeps the cable tensioned until the end of the cutting process. This is the technique which is widely used as it gives room for calibration and makes it easy to rework the blocks with sharp edge. The standards which are related to marbles are, ASTM C503, Standard Specification for Marble Dimension Stone (Exterior). This governs the marble dimension under the TEAM (Testing and Assessment of Marble). ASTM stands for American Society for Testing and Materials (ASTM). The other standard is, ANSI A10.20, Safety Requirements for Ceramic Tile, Terrazzo and Marble Work. This governs the safety of marble to the users. ANSI stands for American National Standards Institute (Marble Institute of America 2016).

Reference