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    ASTM C494/C494M-17 REDLINE

    Standard Specification for Chemical Admixtures for Concrete
    • 발행일 : 2017-06-15
    • 발행기관 : ASTM
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1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows:

1.1.1 Type A—Water-reducing admixtures,

1.1.2 Type B—Retarding admixtures,

1.1.3 Type C—Accelerating admixtures,

1.1.4 Type D—Water-reducing and retarding admixtures,

1.1.5 Type E—Water-reducing and accelerating admixtures,

1.1.6 Type F—Water-reducing, high range admixtures,

1.1.7 Type G—Water-reducing, high range, and retarding admixtures, and

1.1.8 Type S—Specific performance admixtures.

1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1 – 11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1 – 11.3.

Note 1: It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1.

Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200–mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C1017/C1017M.

Note 2: The purchaser should ensure that the admixture supplied for use in the work is equivalent in composition to the admixture subjected to test under this specification (see Section 6, Uniformity and Equivalence).

Note 3: Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Compliance with the requirements of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete.

1.3 This specification provides for three levels of testing.

1.3.1 Level 1—During the initial approval stage, proof of compliance with the performance requirements defined in Table 1 demonstrates that the admixture meets the requirements of this specification. Admixtures (except for Types B, C, E, and S) shall qualify for provisional compliance when the physical requirements and any of the alternative compressive strength requirements in Table 1 are met. If subsequent test results at six months or one year fail to meet the standard requirement of 100 % of reference strength, the compliance of the admixture to this standard is withdrawn and all users of the admixture shall be notified immediately. Uniformity and equivalence tests of Section 6 shall be carried out to provide results against which later comparisons can be made (see Note 4).

TABLE 1 Physical RequirementsA

 

Type A,
Water
Reducing

Type B,
Retarding

Type C,
Acceler-
ating

Type D,
Water
Reducing
and
Retarding

Type E,
Water
Reducing
and
Accelerating

Type F,
Water
Reducing,
High Range

Type G,
Water
Reducing,
High
Range
and Retarding

Type S
Specific
Performance

Water content, max, % of  control

95

...

...

95

95

88

88

...

Time of setting, allowable deviation from control, h:min:

 

 

 

 

 

 

 

 

Initial: at least

...

1:00 later

1:00 earlier

1:00 later

1:00 earlier

...

1:00 later

 

 not more than

1:00 earlier
nor 1:30
later

3:30 later

3:30 earlier

3:30 later

3:30 earlier

1:00 earlier
nor 1:30
later

3:30 later

1:00 earlier
nor 1:30
later

Final: at least

...

...

1:00 earlier

...

1:00 earlier

...

...

 

 not more than

1:00 earlier
nor 1:30
later

3:30 later

...

3:30 later

...

1:00 earlier
nor 1:30
later

3:30 later

1:00 earlier
nor 1:30
later

Compressive strength, min, % of control:B

 

 

 

 

 

 

 

 

  1 day

...

...

...

...

...

140

125

...

  3 days

110

90

125

110

125

125

125

90

  7 days

110

90

100

110

110

115

115

90

 28 days

110
(120)C

90

100

110
(120)C

110

110
(120)C

110
(120)C

90

 90 days

(117)C

n/a

n/a

(117)C

n/a

(117)C

(117)C

n/a

  6 months

100
(113)C

90

90

100
(113)C

100

100
(113)C

100
(113)C

90

  1 year

100

90

90

100

100

100

100

90

Flexural strength, min,  % control:B

 

 

 

 

 

 

 

 

  3 days

100

90

110

100

110

110

110

90

  7 days

100

90

100

100

100

100

100

90

 28 days

100

90

90

100

100

100

100

90

Length change, max  shrinkage (alternative  requirements):D

 

 

 

 

 

 

 

 

Percent of control

135

135

135

135

135

135

135

135

 Increase over control

0.010

0.010

0.010

0.010

0.010

0.010

0.010

0.010

Relative durability
 factor, minE

80

80

80

80

80

80

80

80

(A) The values in the table include allowance for normal variation in test results. The object of the 90 % compressive strength requirement for a Type B amd Type S admixture is to require a level of performance comparable to that of the reference concrete.
(B) The compressive and flexural strength of the concrete containing the admixture under test at any test age shall be not less than 90 % of that attained at any previous test age. The objective of this limit is to require that the compressive or flexural strength of the concrete containing the admixture under test shall not decrease with age.
(C) Alternative requirement. If the physical requirements are
국제분류(ICS)코드
페이지수 10
Edition 17

이력정보

No. 표준번호 표준명 발행일 상태
1 ASTM C494/C494M-24상세보기 Standard Specification for Chemical Admixtures for Concrete 2024-06-15 표준
2 ASTM C494/C494M-24 REDLINE상세보기 Standard Specification for Chemical Admixtures for Concrete 2024-06-15 표준
3 ASTM C494/C494M-19 REDLINE상세보기 Standard Specification for Chemical Admixtures for Concrete 2019-12-15 구판
4 ASTM C494/C494M-19상세보기 Standard Specification for Chemical Admixtures for Concrete 2019-12-15 구판
5 ASTM C494/C494M-19e1상세보기 Standard Specification for Chemical Admixtures for Concrete 2019-12-15 구판
6 ASTM C494/C494M-17 REDLINE상세보기 Standard Specification for Chemical Admixtures for Concrete 2017-06-15 구판
7 ASTM C494/C494M-17상세보기 Standard Specification for Chemical Admixtures for Concrete 2017-06-15 구판
8 ASTM C494/C494M-16상세보기 Standard Specification for Chemical Admixtures for Concrete 2016-07-01 구판
9 ASTM C494/C494M-15a상세보기 Standard Specification for Chemical Admixtures for Concrete 2015-10-01 구판
10 ASTM C494/C494M-15상세보기 Standard Specification for Chemical Admixtures for Concrete 2015-06-15 구판
11 ASTM C494/C494M-13상세보기 Standard Specification for Chemical Admixtures for Concrete 2013-04-01 구판
12 ASTM C494/C494M-12상세보기 Standard Specification for Chemical Admixtures for Concrete 2012-07-01 구판
13 ASTM C494/C494M-11상세보기 Standard Specification for Chemical Admixtures for Concrete 2011-07-01 구판
14 ASTM C494/C494M-10a상세보기 Standard Specification for Chemical Admixtures for Concrete 2010-10-01 구판
15 ASTM C494/C494M-10상세보기 Standard Specification for Chemical Admixtures for Concrete 2010-02-01 구판
16 ASTM C494/C494M-08a상세보기 Standard Specification for Chemical Admixtures for Concrete 2008-09-01 구판
17 ASTM C494/C494M-08상세보기 Standard Specification for Chemical Admixtures for Concrete 2008-01-01 구판
18 ASTM C494/C494M-05a상세보기 Standard Specification for Chemical Admixtures for Concrete 2005-12-15 구판
19 ASTM C494/C494M-05상세보기 Standard Specification for Chemical Admixtures for Concrete 2005-05-01 구판
20 ASTM C494/C494M-04상세보기 Standard Specification for Chemical Admixtures for Concrete 2004-01-01 구판
21 ASTM C494/C494M-99a상세보기 Standard Specification for Chemical Admixtures for Concrete 1999-10-10 구판
22 ASTM C494/C494M-99ae1상세보기 Standard Specification for Chemical Admixtures for Concrete 1999-10-10 구판

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