ASTM C618-12a PDF

Class

N

F

C

Silicon dioxide (SiO₂) plus aluminum oxide (Al₂O₃) plus iron oxide (Fe₂O₃),
  min, %

70.0

70.0

50.0

Sulfur trioxide (SO₃), max, %

4.0

5.0

5.0

Moisture content, max, %

3.0

3.0

3.0

Loss on ignition, max, %

10.0

6.0^A

6.0

Class

N

F

C

Fineness:

 Amount retained when wet-sieved on 45 μm (No. 325) sieve, max, %

34

34

34

Strength activity index: ^A

 With portland cement, at 7 days, min, percent of
  control

75^B

75^B

75^B

 With portland cement, at 28 days, min, percent of
  control

75^B

75^B

75^B

Water requirement, max, percent of control

115

105

105

Soundness: ^C

Autoclave expansion or contraction, max, %

0.8

0.8

0.8

Uniformity requirements:

 The density and fineness of individual samples
  shall not vary from the average established by the
  ten preceding tests, or by all preceding tests if the
  number is less than ten, by more than:

 Density, max variation from average, %

5

5

5

 Percent retained on 45-μm (No. 325), max variation,
  percentage points from average

5

5

5

Class

N

F

C

Increase of drying shrinkage of mortar bars at 28 days, max, difference, in %,
 over control^A

0.03

0.03

0.03

Uniformity Requirements:

 In addition, when air-entraining concrete is specified, the quantity of air-
 entraining agent required to produce an air content of 18.0 vol % of mortar
 shall not vary from the average established by the ten preceding tests or by all
 preceding tests if less than ten, by more than, %

20

20

20

Effectiveness in Controlling Alkali-Silica Reaction:^B

 Expansion of test mixture as percentage of low-alkali cement control, at 14
    days, max, %

100

100

100

Effectiveness in Contributing to Sulfate Resistance:^C

Procedure A:

 Expansion of test mixture:

  For moderate sulfate exposure after 6 months exposure, max, %

0.10

0.10

0.10

  For high sulfate exposure after 6 months exposure, max, %

0.05

0.05

0.05

Procedure B:

 Expansion of test mixture as a percentage of sulfate resistance cement
     control after at least 6 months exposure, max,%

100

100

100