Functions: Bentonite has a wide range of applications in construction, civil engineering, metallurgy, ceramics, and chemical industries. In construction, it can be used as a filling material to provide sound insulation, thermal insulation, water absorption, water retention, and soil stabilization. In civil engineering, bentonite can be used for soil reinforcement, waterproofing, isolation, and thermal insulation. In metallurgy and chemical industries, bentonite can act as an adsorbent, decolorizing agent, and dehydrating agent, used for treating wastewater, waste gas, and waste residues. In ceramics, bentonite can be used as a clay material to make pottery, porcelain, and other ceramic products. Countries of Use: The main countries that use bentonite worldwide include the United States, Russia, China, India, and Brazil. These countries use bentonite in different fields, with the United States having the most widespread applications in construction, civil engineering, chemical, and petroleum industries. Characteristics: Bentonite has strong water absorption and swelling properties, and can expand in volume several times or even tens of times when exposed to water. This property makes bentonite an important filling material and reinforcement material, which can be used for soil improvement, soil reinforcement, thermal insulation, and waterproofing. In addition, bentonite has strong adhesive and adsorption properties, and can be used as a binder and adsorbent for the treatment of wastewater, waste gas, and waste residues. Overall, bentonite is a soil type with multiple properties and widespread uses, which can be applied in construction, civil engineering, metallurgy, ceramics, and chemical industries. With the development of technology and the expansion of application fields, the uses of bentonite will continue to increase and expand. At the same time, people are also continuously researching the properties and applications of bentonite, hoping to develop more and better bentonite products to meet the needs of different fields.