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ASTM C1240-20 Standard Specification for Silica Fume Used in Cementitious Mixtures

ASTM-C1240-20 Silica fume

Silica fume—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. or [50-mm] 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 (No. 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

SiO2, min, % 85
Moisture content, max, % 3
Loss on ignition, max, % 6

ASTM C1240-20 Silica Fume Physical Requirements

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 days, min percent of control 105
Specific surface,min,m2/g 15

ASTM C1240 Silica Fume Supplier

Henan Superior Abrasives Import & Export Co., Ltd. is one of the largest suppliers of micronized silica powder in China.We can supply 85%, 92%, 94%, 96%, 99% Undensified Silica Fume and 85%, 92%, 94%, 96% Densified Silica Fume, all of our products meet ASTM and 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.

Packing & Delivery

ASTM C1240-20 Download

ASTM C1240-20.pdf


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