ASTM C1622/C1622M-10(2016)e1

Standard Specification for Cold-Weather Admixture Systems

ABSTRACT
This specification covers cold-weather admixture systems to be added to hydraulic-cement concrete when the temperature of the concrete immediately after placement will be low. This specification stipulates tests of the cold-weather admixture system with suitable materials specified or with materials proposed for specific work, and provides three levels of testing. The apparatus used shall be suitable for low temperature environment. The concrete, cementitious materials, aggregates, and air-entraining admixture shall be tested and shall conform to the values of chemical and performance requirements such as initial setting time, compressive strength, shrinkage, durability.
SCOPE
1.1 This specification covers cold-weather admixture systems to be added to hydraulic-cement concrete when the temperature of the concrete immediately after placement will be as low as -5.0 °C [23.0 °F] prior to the time of initial set.  
1.2 This specification stipulates tests of the cold-weather admixture system with suitable materials as described in 11.1 – 11.3 or with materials proposed for specific work (See 11.5). Unless otherwise requested by the purchaser, tests shall be made using suitable concreting materials as described in 11.1 – 11.3.
Note 1: Whenever practicable, tests should be made using the concreting materials, the mixture proportions, and batching sequence proposed for the specific work (See 11.5) because the time of setting, compressive strength gain, and other properties may vary.  
1.3 This specification provides 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 cold-weather admixture system meets the requirements of this specification. Uniformity and equivalence tests (See Section 6) shall be carried out to provide results against which later comparisons can be made.  (A) The values in the table include allowance for normal variation in test results(B) As an example, in the case of initial time of setting, if the control mixture has a set time of 4.0 hrs, the test specimens can have a set time up to 8.0 hrs. For length change, if the control specimen shrinks X units, the test specimen is allowed to shrink up to 1.35X.(C) The compressive strength of the concrete containing the cold-weather admixture shall not be less than 90 % of that attained at the previous test age. The objective of this limit is to require that the compressive strength of the cold-weather admixture concrete shall not decrease with age.(D) Because the test specimens will be cool and damp for the 7d compressive test, it will be necessary to use unbonded caps as described in Practice C1231/C1231M.(E) Alternative requirements, see 17.1.2: Percent of control applies when shrinkage of control concrete is 0.030 % or greater; the increase over control limit applies when shrinkage of control concrete is 0.030 % or less.(F) This requirement is applicable only when the cold-weather admixture is to be used in air-entrained concrete that may be exposed to freezing and thawing while wet.  
1.3.2 Level 2—Limited retesting is described in 5.2, 5.2.1, and 5.2.2. Proof of compliance with the requirements of Table 1 demonstrates conformity of the admixture system with the requirements of this specification.  
1.3.3 Level 3—For acceptance of a lot or for measuring uniformity within or between lots, when specified by the purchaser, uniformity and equivalence tests (See Section 6) shall be used.  
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.5 The text of this standard references notes and footnote...

General Information

• Status: Published
• Publication Date: 30-Sep-2016
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.23 - Chemical Admixtures

Relations

• Replaces: ASTM C1622/C1622M-10 - Standard Specification for Cold-Weather Admixture Systems
• Effective Date: 01-Oct-2016
• Refers: ASTM C231/C231M-24 - Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
• Effective Date: 01-Jan-2024
• Refers: ASTM C1064/C1064M-23 - Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete
• Effective Date: 01-Dec-2023
• Refers: ASTM C39/C39M-23 - Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens
• Effective Date: 01-Dec-2023
• Refers: ASTM C1231/C1231M-23 - Standard Practice for Use of Unbonded Caps in Determination of Compressive Strength of Hardened Cylindrical Concrete Specimens
• Effective Date: 01-Oct-2023
• Refers: ASTM C125-19a - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 15-Dec-2019
• Refers: ASTM C150/C150M-19 - Standard Specification for Portland Cement
• Effective Date: 01-Apr-2019
• Refers: ASTM C125-19 - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 01-Jan-2019
• Refers: ASTM C125-18b - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 01-Oct-2018
• Refers: ASTM C125-18a - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 01-Jul-2018
• Refers: ASTM C125-18 - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 01-Jan-2018
• Refers: ASTM C157/C157M-17 - Standard Test Method for Length Change of Hardened Hydraulic-Cement Mortar and Concrete
• Effective Date: 15-Aug-2017
• Refers: ASTM C39/C39M-17b - Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens
• Effective Date: 01-Aug-2017
• Refers: ASTM C125-16 - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 15-Dec-2016
• Refers: ASTM C39/C39M-16b - Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens
• Effective Date: 01-Aug-2016

Overview

ASTM C1622/C1622M-10(2016)e1 – Standard Specification for Cold-Weather Admixture Systems provides comprehensive guidelines for the use of cold-weather admixtures in hydraulic-cement concrete. This standard, developed by ASTM International, ensures that concrete can be placed and set at temperatures as low as -5.0°C (23.0°F), safeguarding construction quality during cold weather. The specification details testing requirements, performance criteria, and procedures for ensuring the uniformity and effectiveness of admixture systems when used in adverse temperature conditions.

Key Topics

• Scope of Application: Covers admixtures added to hydraulic-cement concrete when immediate post-placement temperatures could be as low as -5.0°C (23.0°F).
• Testing Requirements: Specifies three levels of testing for cold-weather admixture systems:
  • Level 1: Initial approval, including proof of compliance with performance requirements and uniformity tests.
  • Level 2: Retesting for current compliance based on proven performance.
  • Level 3: Tests for lot acceptance and assessment of uniformity, especially when requested by the purchaser.
• Performance Criteria: Outlines key properties that must be evaluated including:
  • Initial setting time
  • Compressive strength at multiple ages
  • Shrinkage (length change)
  • Durability under freeze/thaw cycles
• Testing Apparatus: Details requirements for equipment such as low-temperature chambers and temperature measurement devices.
• Material Specifications: Lists requirements for cement, aggregates, water, and air-entraining admixtures to be compatible with the cold-weather admixture system.
• Sampling and Retesting: Describes procedures for sample collection, storage, and testing to confirm ongoing conformity.

Applications

ASTM C1622/C1622M is vital for construction projects where concrete must be placed during cold weather, particularly when ambient temperatures threaten to delay setting or reduce early strength. It is widely used by:

• Concrete producers and contractors involved in winter concreting or projects in cold regions
• Specifiers and engineers ensuring compliance with cold-weather placement requirements
• Quality control laboratories overseeing admixture system effectiveness

By adhering to the standard, organizations can:

• Prevent frozen concrete and associated structural weaknesses
• Achieve intended concrete strength development despite cold conditions
• Enhance long-term durability by addressing freeze-thaw and shrinkage concerns
• Meet regulatory and contractual requirements for seasonal construction projects

The standard's provisions help optimize cold-weather concreting operations, support project schedules, and reduce the risk of costly repairs or defects due to improper curing conditions.

Related Standards

For optimal implementation and compliance, reference to the following related ASTM standards is recommended:

• ASTM C33/C33M – Specification for Concrete Aggregates
• ASTM C39/C39M – Test Method for Compressive Strength of Cylindrical Concrete Specimens
• ASTM C125 – Terminology Relating to Concrete and Concrete Aggregates
• ASTM C136/C136M – Test Method for Sieve Analysis of Fine and Coarse Aggregates
• ASTM C138/C138M – Test Method for Density (Unit Weight), Yield, and Air Content of Concrete
• ASTM C143/C143M – Test Method for Slump of Hydraulic-Cement Concrete
• ASTM C260/C260M – Specification for Air-Entraining Admixtures for Concrete
• ASTM C494/C494M – Specification for Chemical Admixtures for Concrete

These referenced standards provide essential support for materials testing, concrete mix proportioning, and performance verification, contributing to robust cold-weather concreting practices.

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Keywords: ASTM C1622, cold-weather admixture, concrete admixtures, hydraulic-cement concrete, winter concreting, freeze-thaw durability, setting time, compressive strength, concrete standards, admixture system testing.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
´1
Designation:C1622/C1622M −10 (Reapproved 2016)
Standard Specification for
Cold-Weather Admixture Systems
This standard is issued under the fixed designation C1622/C1622M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
ε NOTE—Editorially corrected ASTM designation references in October 2016.
1. Scope* system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
1.1 This specification covers cold-weather admixture sys-
with the standard.
tems to be added to hydraulic-cement concrete when the
1.5 The text of this standard references notes and footnotes,
temperature of the concrete immediately after placement will
be as low as -5.0 °C [23.0 °F] prior to the time of initial set. which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered
1.2 This specification stipulates tests of the cold-weather
as requirements of the standard.
admixture system with suitable materials as described in 11.1
1.6 The following precautionary caveat pertains to the test
– 11.3 or with materials proposed for specific work (See 11.5).
methods portion, Sections11–18, of this specification. This
Unless otherwise requested by the purchaser, tests shall be
standard does not purport to address all of the safety concerns,
made using suitable concreting materials as described in 11.1 –
if any, associated with its use. It is the responsibility of the user
11.3.
of this standard to establish appropriate safety and health
NOTE 1—Whenever practicable, tests should be made using the
practices and determine the applicability of regulatory limita-
concreting materials, the mixture proportions, and batching sequence
tions prior to use. WARNING—Fresh hydraulic cementitious
proposed for the specific work (See 11.5) because the time of setting,
compressive strength gain, and other properties may vary. mixtures are caustic and may cause chemical burns to skin and
tissue upon prolonged exposure.
1.3 This specification provides three levels of testing.
1.3.1 Level 1—During the initial approval stage, proof of
2. Referenced Documents
compliance with the performance requirements defined in
2.1 ASTM Standards:
Table 1 demonstrates that the cold-weather admixture system
C33/C33M Specification for Concrete Aggregates
meets the requirements of this specification. Uniformity and
C39/C39M Test Method for Compressive Strength of Cylin-
equivalencetests(SeeSection6)shallbecarriedouttoprovide
drical Concrete Specimens
results against which later comparisons can be made.
C125 Terminology Relating to Concrete and Concrete Ag-
1.3.2 Level 2—Limited retesting is described in 5.2, 5.2.1,
gregates
and 5.2.2. Proof of compliance with the requirements of Table
C136/C136M Test Method for Sieve Analysis of Fine and
1 demonstrates conformity of the admixture system with the
Coarse Aggregates
requirements of this specification.
C138/C138M Test Method for Density (Unit Weight),Yield,
1.3.3 Level 3—For acceptance of a lot or for measuring
and Air Content (Gravimetric) of Concrete
uniformity within or between lots, when specified by the
C143/C143M Test Method for Slump of Hydraulic-Cement
purchaser, uniformity and equivalence tests (See Section 6)
Concrete
shall be used.
C150/C150M Specification for Portland Cement
1.4 The values stated in either SI units or inch-pound units
C157/C157M Test Method for Length Change of Hardened
are to be regarded separately as standard. Within the text, the
Hydraulic-Cement Mortar and Concrete
inch-pound units are shown in brackets. The values stated in
C183/C183M Practice for Sampling and the Amount of
each system may not be exact equivalents; therefore, each
Testing of Hydraulic Cement
1 2
This specification is under the jurisdiction of ASTM Committee C09 on Section on Safety Precautions, Manual of Aggregates and Concrete Testing,
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee Annual Book of ASTM Standards Vol. 04.02.
C09.23 on Chemical Admixtures. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2016. Published October 2016. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 2005. Last previous edition approved in 2010 as C1622/C1622M-10. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/C1622_C1622M-10R16E01. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C1622/C1622M−10 (2016)
TABLE 1 Performance Requirements
3.2 Definitions of Terms Specific to This Standard:
A
for Cold-Weather Admixture
3.2.1 cold-weather admixture system, n—an admixture or
Time of Initial Setting,
groupofadmixturesthatdepressesthefreezingpointofmixing
B
maximum % of control
water and increases the hydration rate of cement in concrete.
Compressive Strength.
3.2.2 control concrete mixture, n—a concrete mixture with-
C
minimum % of control
D
out the cold-weather admixture system.
7 days 40
28 days 80
3.2.3 dummy concrete specimen, n—additional concrete
90 days 90
specimen instrumented with a temperature sensing device to
Length Change, Maximum Shrinkage
estimate the temperature of test concrete specimens.
E
(alternative requirements)
B
3.2.4 replicate concrete specimen, n—additional time-of-
Percent of Control 135
Increase over control, percentage points 0.010
setting specimen exposed to the same temperature regimen as
the test concrete specimen.
Relative Durability Factor,
F
Minimum % of control 80
3.2.5 test concrete mixture, n—a concrete mixture with the
A
The values in the table include allowance for normal variation in test results
cold weather admixture system.
B
As an example, in the case of initial time of setting, if the control mixture has a set
time of 4.0 hrs, the test specimens can have a set time up to 8.0 hrs. For length
change, if the control specimen shrinks X units, the test specimen is allowed to 4. Apparatus
shrink up to 1.35X.
C
4.1 Low Temperature Environment—Achamberofsufficient
The compressive strength of the concrete containing the cold-weather admixture
shall not be less than 90 % of that attained at the previous test age. The objective
size to subject the test specimens to the specified low tempera-
of this limit is to require that the compressive strength of the cold-weather
ture and that allows access for laboratory personnel to conduct
admixture concrete shall not decrease with age.
D
appropriate tests.The chamber or chambers shall be capable of
Because the test specimens will be cool and damp for the 7d compressive test,
it will be necessary to use unbonded caps as described in Practice
cooling numerous specimens from their initial temperature to
C1231/C1231M.
-5.0 6 1 °C [23.0 6 2.0 °F] within the specified elapsed time
E
Alternative requirements, see 17.1.2: Percent of control applies when shrinkage
and maintain them at that temperature for the specified time
of control concrete is 0.030 % or greater; the increase over control limit applies
when shrinkage of control concrete is 0.030 % or less.
period.
F
This requirement is applicable only when the cold-weather admixture is to be
used in air-entrained concrete that may be exposed to freezing and thawing while
4.2 Temperature Measuring Equipment—The temperature
wet.
measuring equipment shall be capable of measuring and
recording the temperature at the center of the dummy speci-
mens to 6 1.0 °C [6 2.0 °F] at least every ⁄2 h for 7 days.
C192/C192M Practice for Making and Curing Concrete Test
4.3 Tools—Molds and tools for preparing test specimens as
Specimens in the Laboratory
described in Practice C192/C192M. Molds shall have lids to
C231/C231M Test Method forAir Content of Freshly Mixed
provide for sealed conditions.
Concrete by the Pressure Method
C260/C260M Specification for Air-Entraining Admixtures
5. General Requirements
for Concrete
C403/C403M Test Method for Time of Setting of Concrete
5.1 For initial compliance with this specification, the con-
Mixtures by Penetration Resistance
crete shall be tested with the cold-weather admixture system
C494/C494M Specification for Chemical Admixtures for
for conformance with the requirements in Table 1.
Concrete
5.2 The purchaser is permitted to require limited retesting to
C666/C666M Test Method for Resistance of Concrete to
confirm current compliance of the admixture system to speci-
Rapid Freezing and Thawing
fication requirements. The limited retesting includes measure-
C1064/C1064M Test Method for Temperature of Freshly
ments of physical and performance properties of the admixture
Mixed Hydraulic-Cement Concrete
system as described in 5.2.1 and 5.2.2.
C1231/C1231M Practice for Use of Unbonded Caps in
5.2.1 The physical properties retesting consists of unifor-
Determination of Compressive Strength of Hardened Cy-
mity and equivalence tests of the admixture system for infrared
lindrical Concrete Specimens
absorption spectrum and relative density.
D1193 Specification for Reagent Water
5.2.2 The performance properties retesting consists of time
2.2 American Concrete Institute Standard:
of initial setting and compressive strength of concrete at 7 and
ACI 211.1 Practice for Selecting Proportions for Normal,
28 days. Purchasers having special requirements are permitted
Heavyweight, and Mass Concrete
to require additional tests.
3. Terminology
5.3 At the request of the purchaser, the manufacturer shall
state in writing that the admixture system supplied for use in
3.1 Definitions:
the work is equivalent in all essential respects, including
3.1.1 Fordefinitionsoftermsusedinthisspecification,refer
concentration, to the admixture system tested under this
to Terminology C125.
specification.
5.4 At the request of the purchaser, the manufacturer shall
Available fromAmerican Concrete Institute (ACI), P.O. Box 9094, Farmington
Hills, MI 48333-9094, http://www.aci-int.org. state in writing the chloride content of the admixture system.
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C1622/C1622M−10 (2016)
5.5 Tests for uniformity and equivalence, as indicated in 9.3 Forthepurposeofthisspecification,itisrecognizedthat
Section 6, shall be made on the initial sample and the results samples will be taken for two reasons:
retained for reference and comparison with the results of 9.3.1 Compliance Tests—A sample taken for evaluating
samples taken elsewhere within the lot or subsequent lots of compliance of a source or lot of cold-weather admixture
admixture supplied to the work. system shall meet the applicable requirements of this specifi-
cation. Samples used to determine conformance with this
6. Uniformity and Equivalence Tests specification shall be composites of grab samples taken from
different locations so that the composite sample will be
6.1 When specified by the purchaser, the uniformity of a lot,
representative of the lot.
or equivalence of multiple lots from the same source shall be
9.3.2 Uniformity and Equivalence Tests—Whenspecifiedby
established by the following requirements:
the purchaser, a sample taken for evaluating the uniformity of
6.1.1 Infrared Analysis—The absorption spectra of the ini-
a single lot or equivalence of multiple lots from one source
tialsampleandthetestsample,obtainedasspecifiedinSection
shall be tested as provided in Section 6. When uniformity of a
18, shall exhibit the same pattern of absorption bands in terms
single lot is being determined, grab samples shall be used.
of frequency and intensity.
Whenuniformityofmultiplelotsfromthesamesourceisbeing
6.1.2 Relative Density (LiquidAdmixture)—When tested as
determined, composite samples from individual lots shall be
specifiedinSection18,therelativedensity(specificgravity)of
used.
subsequent test samples shall not differ from the relative
9.4 Liquid Admixtures—Liquid admixtures shall be agitated
density of the initial sample by more than 10 % of the
differencebetweentherelativedensityoftheinitialsampleand immediately prior to sampling. Grab samples taken for quality
or uniformity tests shall represent a unit shipment or a single
reagentwateratthesametemperature.Reagentwaterconform-
ing to Specification D1193, Type III or IV, and prepared by production lot. Each grab sample shall be at least 1 L[1 qt].At
least three grab samples of equal portions shall be taken.
distillation, ion exchange, reverse osmosis, or a combination of
these procedures, is acceptable (See Note 2). Composite samples shall be prepared by mixing the grab
samples and the resultant mixture shall provide at least 3 L [3
6.2 When the nature of the admixture system or analytical
qt] for compliance tests. Grab samples shall be taken from
capability of the purchaser make these procedures unsuitable,
different locations distributed throughout the quantity to be
other requirements for uniformity and equivalence from lot to
represented.
lot or within a lot shall be established by agreement between
9.4.1 Admixtures in bulk storage tanks shall be sampled
the purchaser and the manufacturer.
equally from the upper, intermediate, and lower levels by
NOTE 2—Oven drying methods are not appropriate for measuring the
means of drain cocks in the sides of the tanks or a weighted
oven-dried residue content for cold-weather admixture system because
sampling bottle fitted with a stopper that can be removed after
water, present in the form of bound water of hydration, is released slowly
the bottle is lowered to the desired depth.
upondrying,andcanoftenleadtohighlyvariableresults.Relativedensity
9.4.2 Samples shall be stored in impermeable containers
is an acceptable indication of lot-to-lot uniformity.
that are resistant to attack by the admixture.
7. Packaging and Marking
9.5 Nonliquid Admixtures—Grab samples taken for compli-
7.1 When the cold-weather admixture system is delivered in anceoruniformitytestsshallbeatleast1kg[2lb].Atleastfour
packages or containers, the proprietary name of the individual grab samples of equal portions shall be taken from not more
admixtures in the system, the designation of this specification, than2Mg[2tons]ofadmixture.Preparecompositesamplesby
and the net mass or volume shall be plainly marked thereon. mixing the grab samples and sampling the resultant mixture to
Similar information shall be provided in the shipping informa- provide at least 2.5 kg [5 lb] for the composite sample. Take
tion accompanying packages or bulk shipments of admixture. grab samples from different locations distributed throughout
the quantity to be represented.
8. Storage 9.5.1 Obtain samples of packaged admixtures by means of a
sampler as described in Practice C183/C183M.
8.1 Store the cold-weather admixture system to permit easy
9.5.2 Samples shall be stored in moisture-proof, airtight
access for proper inspection and identification of each
containers.
shipment, and in a suitable building that will protect the
admixture from moisture absorption if it is a dry admixture or 9.6 Mix samples before testing to ensure uniformity. When
from freezing if it is a liquid admixture. recommended by the manufacturer, dissolve the entire sample
of non-liquid admixture in water prior to testing.
9. Sampling and Testing
10. Rejection
9.1 Every facility shall be provided to the purchaser for
sampling and inspection, either at the point of manufacture or 10.1 For initial compliance testing, the purchaser is permit-
at the site of the work, as specified by the purchaser. ted to reject the cold-weather admixture system if it fails to
meet any of the requirements of this specification.
9.2 Samples shall be either “grab” or “composite” samples
asspecifiedbythisspecification.Agrabsampleisoneobtained 10.2 For the initial retesting, the purchaser is permitted to
in a single operation. A composite sample is one obtained by reject the admixture if it fails to meet any of the requirements
combining three or more grab samples. ofSection6andapplicablepartsofTable1,asdefinedin5.2.2.
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C1622/C1622M−10 (2016)
10.3 If, after completion of tests, an admixture has been 11.3.4 Perform sieve analyses on the coarse aggregate
storedatthepointofmanufactureformorethan6monthsprior prepared in 11.3.3.1 by Test Method C136/C136M. Discard
to shipment, or an admixture has been in local storage in the any prepared quantity of aggregate that deviates from the
hands of a vendor for more than 6 months, it shall be retested specified percent passing by more than the amount shown in
before use when requested by the purchaser and is permitted to column 3 below.
be rejected if it fails to conform to this specification.
Sieve Specification C33/ Maximum Variation
C33M, from Percent Passing
10.4 Packages and containers varying more than 5 % from
No. 57
thespecifiedmassorvolumearepermittedtoberejected.Ifthe Percent Passing by
Mass
average mass or volume of 50 packages taken at random is less
37.5mm(1 ⁄2 in.) 100 0.0
than that specified, the entire shipment is permitted to be
25.0 mm (1 in.) 95 to 100 1.0
12.5mm( ⁄2 in.) 25 to 60 4.0
rejected.
4.75 mm (No. 4) 0 to 10 4.0
10.5 When the admixture is for a specific use in non-air- 2.36 mm (No. 8) 0 to 5 1.0
entrained concrete, it is permitted to be rejected if the test
11.4 Air-Entraining Admixture—Except when tests are
concrete containing it has an air content greater than 3.5 % at
made in accordance with 11.5 using an air-entraining admix-
the dosage used to meet this specification.When the admixture
ture proposed for specific work, the air-entraining admixture
is to be used in air-entrained concrete, it is permitted to be
used in the concrete mixtures specified in Section 12 shall be
rejected if the test concrete containing it has an air content
a material such that, when used to entrain the specified amount
greaterthan7.5 %atthedosageusedtomeetthisspecification.
of air in the concrete mixture, will give concrete of satisfactory
resistance to freezing and thawing. The air-entraining admix-
11. Materials
ture shall conform to Specification C260/C260M.
11.1 Concrete Not for Specific Use—The materials in 11.2 –
11.5 Concrete for Specific Use—The materials in this sec-
11.4areforcompliancetestingusingaconcretemixturenotfor
tion are for specific use, such as for testing the cold-weather
a specific use.
admixture system in simulated job concrete mixtures. To test
thecold-weatheradmixturesystemforuseinspecificwork,the
11.2 Cementitious Materials—The cementitious materials
cementitious materials, aggregates (See 11.3), other chemical
shall be a Type I or Type II portland cement conforming to
admixtures, and air-entraining admixture used shall be repre-
Specification C150/C150M, or a blend of two or more of these
sentative of those used in the work. Add the cold-weather
cements from different sources.
admixture system in the same manner and at the same time
11.3 Aggregates—Except when tests are made in accor-
during the batching and mixing sequence as it will be added on
dance with 11.4 using the aggregates for a specific use, the fine
the job. Proportion the concrete mixture to be similar to that
and coarse aggregates used in any series of tests shall come
used in the work. If the maximum size of coarse aggregate in
from s
...