silica fume
It is a very active pozzolanic material that has spherical particles whose diameter is less than 1 nm and on average they have a diameter of 15 nm, which are approximately 100 times smaller than cement particles. Silica is also known as silica fume, which has a very high pozzolanic property due to the high percentage of SiO2 in its chemical structure. The specific density of micro silica can be considered around 2.2. The specific density of cement is 3.15. National Regulation No. 13278 and ASTM C1240 are used to control the quality of silica fume.
silica fume
It is a very active pozzolanic material that has spherical particles whose diameter is less than 1 nm and on average they have a diameter of 15 nm, which are approximately 100 times smaller than cement particles. Silica is also known as silica fume, which has a very high pozzolanic property due to the high percentage of SiO2 in its chemical structure. The specific density of micro silica can be considered around 2.2. The specific density of cement is 3.15. National Regulation No. 13278 and ASTM C1240 are used to control the quality of silica fume.
Types of silica fume
In general, silica fume is used in three ways.
Silica powder
Silica gel
Silica fume slurry
The benefits of using silica fume
Increased compressive strength
Increased tensile strength
Increased wear resistance
Decreased permeability
Increase in electrical resistance
Increase resistance if used correctly
Initial compression of concrete and reduction of formwork time
Uses of silica fume
High strength concrete
Powerful concretes
Super strong concretes
Self-compacting concrete
Structural lightweight concrete
Geopolymeric concretes