微細硅粉/硅灰/微硅 Microsilica
美國混凝土研究所(ACI)將微硅定義為“電弧爐生產的非常精細的非晶硅，硅元素或含硅合金生產的副產品(ACI 116R)。它不同于硅粉。微硅又稱硅灰。
標準

IFI微硅(硅灰)符合ASTM c1240, EN 13263, JIS A 6207和ISIRI 13278的要求。
化學成分(元素重量百分比)
ph值8.0 - 9.5
氧指數1.5 - -2.5
C 0.8 - -2.0
二氧化硅90 -95
物理性
散裝密度，kg/m3 310 - 350
比重2.2
物理狀態:非晶
顆粒大小(典型的)< 1µm
顏色:淺灰色
比表面: m2/g 15 - 30
主要應用
混凝土和水泥,耐火材料和陶瓷,高分子化工,油井灌漿,微硅在混凝土中的應用
全球65%的微硅生產用于混凝土和水泥, 應用包括:
混合材,高強度混凝土(HSC),高性能混凝土,Self-Consolidating自密實混凝土(SCC),噴射混凝土,超低滲透混凝土,基型修理產品,碳纖維復合材料的添加劑
包裝
大袋(750公斤),中型袋(500公斤),小包(40公斤)
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Application of Microsilica
The American Concrete Institute (ACI) defines Microsilica as “very fine non-crystalline silica produced in electric arc furnaces as a by-product of production of elemental silicon or alloys containing silicon” (ACI 116R). It is different from pulverized silica. Microsilica, also known as silica fume.>
Standard Specification
IFI Microsilica (Silica Fume) meeting the requirements of ASTM C 1240, EN 13263, JIS A 6207 and ISIRI 13278.
The chemical composition (weight percent elements)
PH 8.0-9.5
LOI 1.5-2.5
C 0.8-2.0
SiO2 90 -95
Physical properties
Bulk density (as-produced), kg/m3 310 - 350
Specific gravity 2.2
Physical state amorphous
Particle size (typical) < 1 µm
Color Light gray
Specific surface m2/g 15 - 30
Main Applications
Concrete and cements
Refractory and Ceramics
Polymer and chemical industry
Oil well grouting
Microsilica Applications in Concrete
The 65 percent of global microsilica production used for concrete and cement. The applications include:
Blended cements
High Strength Concrete (HSC)
High Performance Concrete (HPC)
Self-Consolidating Concrete (SCC)
Shotcrete
Ultra-low permeability concrete
Cementitous repair products
Additive agent for carbon fiber composites
packing
Big Bag (750 kg)
Medium Bag (500 kg)
Small bag (40 kg)