微硅粉—very fine pozzolanic material, composed mostly of amorphous silica produced by electric arc furnaces as a by-product of the production of elemental silicon or ferrosilicon alloys (also known as condensed silica fume and microsilica).
ASTM Standards
C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. 或者 [50-毫米] Cube Specimens)
C114 Test Methods for Chemical Analysis of Hydraulic Cement
C125 Terminology Relating to Concrete and Concrete Aggregates
C135 Test Method for True Specific Gravity of Refractory Materials by Water Immersion
C183 Practice for Sampling and the Amount of Testing of Hydraulic Cement
C185 Test Method for Air Content of Hydraulic Cement Mortar
C219 Terminology Relating to Hydraulic Cement
C311/C311M Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use in Portland-Cement Concrete
C430 Test Method for Fineness of Hydraulic Cement by the 45-m (不. 325) Sieve
C441/C441M Test Method for Effectiveness of Pozzolans or Ground Blast-Furnace Slag in Preventing Excessive Expansion of Concrete Due to the Alkali-Silica Reaction
C494/C494M Specification for Chemical Admixtures for Concrete
C604 Test Method for True Specific Gravity of Refractory Materials by Gas-Comparison Pycnometer
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C1005 Specification for Reference Masses and Devices for Determining Mass and Volume for Use in the Physical Testing of Hydraulic Cement
C1012/C1012M Test Method for Length Change of Hydraulic-Cement Mortars Exposed to a Sulfate Solution
C1069 Test Method for Specific Surface Area of Alumina or Quartz by Nitrogen Adsorption
C1157/C1157M Performance Specification for Hydraulic Cement
C1437 Test Method for Flow of Hydraulic Cement Mortar
ASTM C1240-20 Silica Fume Chemical Requirements
| 二氧化硅, 分钟, % | 85 |
| 水分含量, max, % | 3 |
| 烧失量, max, % | 6 |
ASTM C1240-20 Silica Fume Physical Requirements
| Oversize: | |
| Percent retained on 45-um(No.325), max, % | 10 |
| Percent retained on 45-um (No.325),max variation from | 5 |
| average, percentage points | |
| Accelerated pozzolanic strength activity index: | |
| With portland cement at 7 天, min percent of control | 105 |
| 比表面积,分钟,平方米/克 | 15 |
ASTM C1240 Silica Fume Supplier
河南优之源进口 & 出口贸易公司, 有限公司. is one of the largest suppliers of micronized silica powder in China.We can supply 85%, 92%, 94%, 96%, 99% 未致密硅粉 和 85%, 92%, 94%, 96% 致密硅粉, all of our products meet ASTM 和 SGS standards and are exported to various countries and regions all over the world.With strict standards, high quality products and low prices, our products are well received by our customers.
ASTM C1240-20 Download
