全球微硅粉应用案例

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全球微硅粉应用案例

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微硅粉, 也称为微硅粉, 是生产金属硅或硅铁合金的副产品. It is a highly reactive pozzolan and a well-known supplementary cementitious material used in concrete and other building materials. Here are 5 different cases where silica fume can be applied:

高性能混凝土 (高性能计算):

Structural Applications: In high-rise buildings, 桥梁, and other critical structures, 高性能混凝土 containing silica fume is often used to achieve high strength and durability. It helps in producing concrete with a high compressive strength which can exceed 15000 磅/平方英寸.
海洋结构: Silica fume is used in marine structures to produce concrete that can withstand the aggressive sulfate and chloride environments present in marine locations. It enhances the concrete’s resistance to chloride ion penetration, reducing the risk of reinforcement corrosion.

案例:

Gotthard Base Tunnel, Switzerland

The Gotthard Base Tunnel, which is the world’s longest railway and deepest traffic tunnel, utilized high-performance concrete containing silica fume to ensure the longevity and stability of the tunnel structure. Silica fume was instrumental in achieving the high strength and durability requirements necessary for the challenging environment encountered in deep tunnel construction.

石油和天然气工业:

Well Cementing: In the oil & gas sector, silica fume is used in well cementing applications to improve the properties of the cement used in oil wells. It enhances the strength and durability of the cement, providing a better seal and preventing leaks.
Offshore Structures: For constructing offshore platforms and other structures, silica fume can be used to produce high-strength concrete that can withstand the harsh marine environment, offering improved durability and lifespan.

案例:

Sakhalin-II Project, 俄罗斯

In the Sakhalin-II Project, one of the largest integrated oil and gas projects in the world, silica fume was used in the concrete for the construction of offshore platforms. Utilizing silica fume ensured that the concrete could withstand the harsh marine environment, characterized by extremely low temperatures and high chloride ion concentrations, thereby prolonging the life of the platforms.

Infrastructure:

Roads and Highways: In the construction of roads and highways, silica fume can be used in concrete pavements to enhance their durability and resistance to wear and tear. It provides improved resistance to freeze-thaw cycles and de-icing salts.
Tunnels and Subways: 用于隧道衬砌和其他地下结构, 硅粉可用于生产高强度, 耐用的混凝土，可以抵抗侵蚀性地下水和其他腐蚀性环境.

案例:

Hoover Dam Bypass, 美国

The Hoover Dam Bypass or the Mike O’Callaghan-Pat Tillman Memorial Bridge, constructed in the United States, used concrete containing silica fume to achieve the necessary strength and durability requirements. The incorporation of silica fume helped in achieving high compressive strength concrete, necessary for the support structures which endure immense load stress.

预制混凝土行业:

预制板: 硅粉用于生产预制混凝土板以实现高早期强度, 促进更快的脱模并提高生产率.
混凝土管道和沙井: 在预制混凝土管道和检修孔的生产中, 硅粉可用于增强耐用性和耐腐蚀性环境, 延长使用寿命.

案例:

苹果公园, 美国

Apple’s corporate headquarters in Cupertino, California, also known as Apple Park, features extensive use of precast concrete panels, many of which contain silica fume to meet strict architectural and structural specifications. Silica fume was utilized to achieve the desired surface finish and enhanced strength characteristics required for this high-profile project.

专业应用:

核废料收容: 硅粉可用于核废料遏制混凝土配方中, 增强对放射性物质腐蚀作用的抵抗力.
耐火材料: 硅粉用于生产耐火材料, 提供更高的耐热性和更低的渗透性, 提高工业炉窑耐火衬里的使用寿命.

案例:

Nuclear Waste Containment at Yucca Mountain, 美国

The planned nuclear waste repository at Yucca Mountain in the USA was expected to employ silica fume in the concrete mixtures used for waste containment structures. Silica fume would have contributed to achieving high durability and resistance to corrosive environments, characterized by high radioactivity, thus ensuring long-term containment safety. Note that this project was eventually defunded and not completed, but it stands as an example of planning to use silica fume in such a critical application.

结论

微硅粉, a byproduct in silicon or ferrosilicon production, is an essential component in enhancing the quality and durability of concrete, evident in several landmark projects globally. In Switzerland’s Gotthard Base Tunnel, the world’s longest and deepest traffic tunnel, silica fume fortified the tunnel structure’s concrete to meet the requisite strength and longevity standards. 相似地, in the oil and gas sector, the Sakhalin-II Project in Russia utilized silica fume in concrete to construct resilient offshore platforms capable of withstanding extreme marine environments.

Infrastructure projects, like the USA’s Hoover Dam Bypass, leveraged silica fume’s benefits to develop high-strength support structures, meeting high load stress demands effortlessly. 苹果公园, in Cupertino, California, integrated silica fume in precast concrete panels, achieving stringent architectural and structural prerequisites, thereby ensuring both aesthetics and strength. 而且, the intended Yucca Mountain nuclear waste repository in the USA planned to use silica fume to enhance concrete’s durability and resistance to corrosive, radioactive environments, highlighting its potential in critical containment applications. These case studies epitomize silica fume’s pivotal role in augmenting concrete properties, facilitating the successful realization and longevity of significant infrastructural projects worldwide.