Fume Definition

Silica fume (also called silica powder), also known as silica fume silica fume. Industrial furnace at high temperature silicon and ferrosilicon smelting process, with the exhaust fumes escaping capture by special treatment from the collection device. In the escape of smoke in, SiO2 content of about 90% of total dust, particle size is very small, the average particle size is almost the nanometer level, it is known as silica fume.
Silica fume research began Scandinavian countries, although in the 1950s that people have a better understanding on the role of silica fume and preliminary research, but is used in the actual project since the 1970s, first in Norway and Sweden and other countries in the port terminals, North Sea oil and underground mines is partly based on silica fume concrete, in 1982, Norway in volts Nuoweisi dam formally adopted a fume concrete dam, the early 1980s, established in Quebec, Canada silica fume concrete, and large volume fume concrete pilot study, mixing high-grade concrete 10,000 m3, 1983 the United States with silica fume concrete repair on the river Orinoco Funi card check dam stilling basin to good effect. Rest of the world are also stepping up research and application.
The history of research on silica fume is not long, just 10 years time, 1985 East Institute survey MEW MEW tenth scientific institutes and Engineering Bureau for the first time in Sichuan Yuzixi two power plants in the trial of silica fume concrete in the plant silica fume concrete in 3% to 7% in order to improve the early strength, speed template turnover, to achieve the desired effect, in addition, the diversion tunnel shotcrete, silica fume 715% in order to reduce the amount of concrete rebound, NHRI In dahuofang water engineering, Gezhouba longyangxia sluice sluice gate repair buildings and other projects have adopted the silica fume concrete is better.
IWHR on silica fume concrete durability and silica fume cement grout algae carried out some research and Ertan foundation consolidation grouting, the Pan dam spillway restoration project, Ankang and Sichuan autumn of plant guide stemming the flow hongtong repair and other projects using a silica fume concrete, silica fume cement grout. All of these, described as a high-performance concrete silica fume concrete in engineering increasingly important, so its properties, especially its strength and durability studies have attracted much attention.