ASTM C1141-95

Standard Specification for Admixtures for Shotcrete

SCOPE
1.1 This specification covers materials proposed for use as admixtures to be added to a portland-cement shotcrete mixture for the purpose of altering the properties of the mixture.
1.2  This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.3 The values stated in inch-pound units are to be regarded as the standard.

General Information

• Status: Historical
• Publication Date: 09-Jan-2001
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.46 - Shotcrete

Relations

• Replaced By: ASTM C1141-01 - Standard Specification for Admixtures for Shotcrete
• Effective Date: 10-Jan-2001
• Referred By: ASTM F2480-18 - Standard Guide for In-ground Concrete Skatepark
• Effective Date: 10-Jan-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 1141 – 95
Standard Specification for
Admixtures for Shotcrete
This standard is issued under the fixed designation C 1141; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope Slag for Use in Concrete and Mortars
C 1059 Specification for Latex Agents for Bonding Fresh to
1.1 This specification covers materials proposed for use as
Hardened Concrete
admixtures to be added to a portland-cement shotcrete mixture
C 1240 Specification for Silica Fume for Use in Hydraulic-
for the purpose of altering the properties of the mixture.
Cement Concrete and Mortar
1.2 This standard does not purport to address all of the
D 98 Specification for Calcium Chloride
safety concerns, if any, associated with its use. It is the
2.2 ACI Documents:
responsibility of the user of this standard to establish appro-
318 Building Code Requirements for Reinforced Concrete
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
3. Terminology
1.3 The values stated in inch-pound units are to be regarded
3.1 The terms used in this standard are defined in Termi-
as the standard.
nology C 125.
2. Referenced Documents 3.2 Definitions of Terms Specific to This Standard:
3.2.1 dry-mix shotcrete—Shotcrete in which most of the
2.1 ASTM Standards:
mixing water is added at the nozzle.
C 125 Terminology Relating to Concrete and Concrete
3.2.2 shotcrete—Mortar or concrete pneumatically pro-
Aggregates
jected at high velocity onto a surface.
C 136 Test Method For Sieve Analysis of Fine and Coarse
3.2.3 wet-mix shotcrete—Shotcrete in which most of the
Aggregates
ingredients, including the water, are mixed prior to introduc-
C 138 Test Method for Unit Weight, Yield, and Air Content
tion into the delivery hose.
(Gravimetric) of Concrete
C 173 Test Method for Air Content of Freshly Mixed
4. Classification
Concrete by the Volumetric Method
4.1 This specification recognizes grades of admixtures, used
C 183 Practice for Sampling and the Amount of Testing of
3 in shotcrete made by either of two processes, as follows:
Hydraulic Cement
4.1.1 Type I—Dry mix shotcrete.
C 231 Test Method for Air Content of Freshly Mixed
2 4.1.1.1 Grade 1—Accelerating admixture, conventional.
Concrete by the Pressure Method
4.1.1.2 Grade 2—Retarding admixture.
C 260 Specification for Air-Entraining Admixtures for Con-
2 4.1.1.3 Grade 3—Pozzolanic admixture.
crete
4.1.1.4 Grade 4—Metallic iron admixture.
C 311 Test Methods for Sampling and Testing Fly Ash or
4.1.1.5 Grade 5—Coloring admixture.
Natural Pozzolans for Use as a Mineral Admixture in
2 4.1.1.6 Grade 6—Organic polymer admixture.
Portland-Cement Concrete
2 4.1.1.7 Grade 7—Not applicable.
C 494 Specification for Chemical Admixtures for Concrete
4.1.1.8 Grade 8—Not applicable.
C 618 Specification for Coal Fly Ash and Raw or Calcined
4.1.1.9 Grade 9—Accelerating admixture, quick-setting.
Natural Pozzolan for Use as a Mineral Admixture in
2 4.1.2 Type II—Wet-mix shotcrete.
Concrete
4.1.2.1 Grade 1—Accelerating admixture, conventional.
C 979 Specification for Pigments for Integrally Colored
2 4.1.2.2 Grade 2—Retarding admixture.
Concrete
4.1.2.3 Grade 3—Pozzolanic admixture.
C 989 Specification for Ground Granulated Blast Furnace
4.1.2.4 Grade 4—Metallic iron admixture.
4.1.2.5 Grade 5—Coloring admixture.
1 4.1.2.6 Grade 6—Organic polymer admixture.
This specification is under the jurisdiction of ASTM Committee C-9 on
Concrete and Concrete Aggregatesand is the direct responsibility of Subcommittee 4.1.2.7 Grade 7—Water reducing admixture.
C09.46on Shotcrete.
Current edition approved Nov. 10, 1995. Published February 1996. Originally
published as C 1141 – 89. Last previous edition C 1141 – 94. Annual Book of ASTM Standards, Vol 04.03.
2 5
Annual Book of ASTM Standards, Vol 04.02. Available from American Concrete Institute, P.O. Box 19150, Detroit, MI
Annual Book of ASTM Standards, Vol 04.01. 48219.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
C 1141
4.1.2.8 Grade 8—Air-entraining admixture. the request of the purchaser, the manufacturer shall recommend
4.1.2.9 Grade 9—Accelerating admixture, quick-setting. appropriate test procedures, such as infrared spectrophotom-
4.1.3 Each of the above grades is further classified by etry, pH value, and solids content, for establishing the equiva-
identifying it according to the following classes: lence of material from different lots or different portions of the
4.1.3.1 Class A—Liquid. same lot.
4.1.3.2 Class B—Non-liquid. 6.4 At the request of the purchaser, the manufacturer shall
state in writing the chloride content of the admixture.
5. Ordering Information
NOTE 1—Ultraviolet absorption of solutions and infrared spectroscopy
5.1 The purchaser shall include the following information in
of dried residues have been found to be valuable for these purposes. The
the contract or purchase order, if applicable.
specific procedures to be employed and the criteria to establish equiva-
5.1.1 The specification designation and date of issue.
lence should be stipulated with due regard to the composition and
5.1.2 Type of shotcrete, grade and class of admixture. properties of the sample.
5.1.3 Quantity of admixture required. NOTE 2—Admixtures containing relatively large amounts of chloride
ions may make embedded metals susceptible to corrosion when moisture
5.1.4 Special packaging and package marking requirements.
and oxygen are present in hardened shotcrete.
5.1.5 Special sampling for inspection requirements.
5.1.6 Any supplementary requirements.
7. Sampling
6. Requirements
7.1 Access shall be provided to the purchaser for careful
sampling, either at the point of manufacture, or at the site of the
6.1 Shotcrete admixtures shall conform to the requirements
work, as may be specified by the purchaser.
for the applicable type and grade as given in Table 1.
7.2 Samples shall be either grab or composite samples, as
6.2 At the request of the purchaser, the manufacturer shall
specified or required by this specification. A grab sample is one
state in writing that the admixture supplied is essentially
secured in a single operation. A composite sample is one
identical in concentration, composition, and performance to the
obtained by combining three or more grab samples.
admixture previously tested under this specification and found
7.3 The sample size for each class of admixture shall be as
to comply with the applicable requirements thereof.
6.3 Requirements for establishing compositional or chemi- follows:
7.3.1 Class A Liquid Admixtures:
cal equivalence of a lot or of a subsequent lot relative to a
previous lot that was subjected to quality tests and found to 7.3.1.1 Liquid admixtures shall be agitated thoroughly im-
comply with the applicable requirements may be determined mediately prior to sampling. Individual grab samples shall
by agreement between the purchaser and the manufacturer. At represent not more than 2500 gal (9500 L) of admixture and
TABLE 1 Shotcrete Admixture Requirements
Type I—Dry-Mix Shotcrete
Grade Admixture ASTM Standard Other Limits
1 Accelerating, conventional D 98, C 494 Type C or E
2 Retarding C 494 Type B or D
3 Pozzolanic C 618, C 989, C 1240
4 Metallic iron Not established The metallic pa
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