HENAN SUPERIOR ABRASIVES IMPORT& EXPORT CO., LTD.
Tel: +86-18638638803
Web: https://hsamaterial.com
E-mail: sales@superior-abrasives.com
No.806,8th floor,8th building,No.68 Zhengtong road,Erqi District Zhengzhou Henan, China
SILICA FUME TECHNICAL DATA SHEET
SILICA FUME is a very fine pozzolanic material, composed of amorphous silica produced by electric arc furnaces as a byproduct of the production of elemental silicon or ferro silicon a1loys.
SILICA FUME can be used in a variety of applications such as concrete, grouts, mortars, fibre cement products, refractory oil/gas well cements, ceramics, elastomer, and polymer applications.
SILICA FUME is produced in conformance with the ASTM C1240 specifications. The quality is contro1led and monitored throughout the entire production process to ensure that it meets or exceeds specification requirements.
| PROPERTIES | |
| State | Amorphous – Sub-micron powder |
| Color | Gray powder |
| Specific Gravity | 2.10 to 2.40 |
| Solubility | Insoluble |
| Bulk Density – Densified | 600 to 650 kg/m3 |
| Bulk Density – Undensified “as produced” | 300 to 350 kg/m3 |
| SPECIFICATIONS | ||
| Chemical Requirements | ASTM | Typical |
| silicon Dioxide (SiO2)% | 85.0%Minimum | 90.42% |
| Moisture Content % | 3.0%Maximum | 0.26% |
| Loss on Ignition(LOI) % | 6.0%Maximum | 2.81% |
| Physical Requirements | ASTM | Typical |
| Oversize percent retained on 45 um(325 sieve) | 10.0% Maximum | 1.43% |
| Accelerated Pozzolanic Strength Activity Index with Portland cement(7 day) |
105.0%Minimum | 118% |
| Surface Area | 15 ㎡/g Minimum | 21.10㎡/g |
MECHANISM OF SILICA FUME’S POZZOLANIC REACTION IN A CEMENTITOUS SYSTEM
SILICA FUME in contact with water goes into solution within an hour. The silica in solution forms an amorphous silica rich, Ca poor, gel on the surface of the silica fume particles and agglomerates. After time the silica rich, Ca poor, coating dissolves and the agglomerates of silica fume reacts with free lime (CaOH2) to form calcium silicate hydrates (CSH). This reaction is called the pozzolanic reaction.
STORAGE
SILICA FUME should be kept dry out of weather and the elements.
SAFETY AND HANDLING PRECAUTIONS
SILICA FUME is generally considered a nuisance dust. Use and handling of silica fume does not represent a health risk when normal safety rules are observed. Direct contact may cause irritation of eyes. Prolonged contact may cause skin irritation. Inhalation may cause respiratory irritation resulting in coughing and shortness of breath. This product may be harmful if swallowed. Do not get in eyes and avoid prolonged skin contact. Do not take internally. Wash thoroughly with water after handling.
Country of origin: China
For SIO2 85 HENAN SUPERIOR ABRASIVES Silica Fume Technical Data Sheet (TDS)
