User:Yibofeng3/Marble

Article
Marble

Original Text
Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Marble is typically not foliated (layered), although there are exceptions. In geology, the term marble refers to metamorphosed limestone, but its use in stonemasonry more broadly encompasses unmetamorphosed limestone. Marble is commonly used for sculpture and as a building material.

Changes
Marble is a metamorphic rock consisting of carbonate minerals that recrystallize under the influence of heat, pressure and aqueous solutions, most commonly calcite (CaCO3) or dolomite (CO3)2 and has a crystalline texture of varying thickness. Marble is typically not foliated (layered), although there are exceptions. About 10-15% of the sedimentary rocks on Earth are composed of limestone. In geology, the term marble refers to metamorphosed limestone, but its use in stonemasonry more broadly encompasses unmetamorphosed limestone. Marble is commonly used in sculpture and in the production of construction materials such as cement.

Feature
Marble is a rock composed of calcium and magnesium carbonate, mostly white and pink. Common marble varieties are granular limestone or dolomite. The hardness of marble is very high, because the internal structure of the rock is very uniform after long-term natural aging, and the internal stress disappears, so the marble will not be deformed due to temperature, and has strong wear resistance. It is a very popular building material.

The following table is a summary of the features of Marble.

Occupational safety
Dust, debris and temperature fluctuations from working marble can endanger the eye health of employees. For the staff involved in marble processing, it is necessary to provide eye protection equipment, and it is recommended to improve the education of all workers on occupational health risks and strengthen preventive measures.

Impact on the environment
Total world quarrying production in 2019 was approximately 316 million tonnes; however, quarrying waste accounted for 53% of this total production. In the process of marble mining and processing, there will be a large amount of non-degradable waste, which will cause serious damage to the environment and threaten the life of animals and plants. For example, the poor management of mining activities has resulted in a large amount of waste rocks, and the waste is thrown by the river, polluting the surrounding water sources, causing groundwater pollution, and endangering human health. According to the research of water samples around the marble mine, it was found that the number of cations and anions in the water increased.

Sustainability
Marble sludge waste can be used as a mineral filler in water-based paints. Using ground calcium carbonate as a filler in paint production can improve the brightness, hiding power and application performance of paint, and can also replace expensive pigments such as titanium dioxide. Recycling of marble waste leads to a large amount of waste not being landfilled, reducing environmental pollution, thereby realizing the sustainability of marble. Converting waste to generate economic income and restore degraded soil can improve the environment.

Cleaning and Prevention
The nature of marble is soft and porous, so it is easily stained by colored liquids and scratches easily. So daily maintenance and cleaning is particularly important.

Prevention

 * Prevent sand and dust from contacting the marble surface.
 * Avoid corroding marble surfaces with alcohol, color and acidic liquids.

Cleaning

 * As a floor material, marble is the easiest to scratch. You can first use a vacuum cleaner to suck away the grit and dust on the marble floor, and then use a steam cleaner to remove other dirt.
 * A mild, pH-neutral, non-abrasive soap should be used for cleaning marble surfaces. Wipe with a soft foam cotton or rag.