ASTM C171-97a

Standard Specification for Sheet Materials for Curing Concrete

SCOPE
1.1 This specification covers materials in sheet form used for covering the surfaces of hydraulic cement concrete to inhibit moisture loss during the curing period and, in the case of the white reflective type materials, to also reduce temperature rise in concrete exposed to radiation from the sun. The following types are included:  
1.1.1 Curing Paper:  
1.1.1.1 Regular.  
1.1.1.2 White.  
1.1.2 Polyethylene Film:  
1.1.2.1 Clear.  
1.1.2.2 White Opaque.  
1.1.3 White-Burlap-Polyethylene Sheet.  
1.2 The values stated in inch-pound units are to be regarded as the standard.
1.3 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes shall not be considered as requirements of the standard.

General Information

• Status: Historical
• Publication Date: 31-Dec-1996
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.22 - Materials Applied to New Concrete Surfaces

Relations

• Replaced By: ASTM C171-03 - Standard Specification for Sheet Materials for Curing Concrete
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1140/C1140M-11(2019) - Standard Practice for Preparing and Testing Specimens from Shotcrete Test Panels
• Effective Date: 01-Jan-1997
• Referred By: ASTM C1581/C1581M-18a - Standard Test Method for Determining Age at Cracking and Induced Tensile Stress Characteristics of Mortar and Concrete under Restrained Shrinkage
• Effective Date: 01-Jan-1997

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 171 – 97a
Standard Specification for
Sheet Materials for Curing Concrete
This standard is issued under the fixed designation C 171; 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.
This specification has been approved for use by agencies of the Department of Defense.
1. Scope 2.2 ACI Standard:
ACI 308 Standard Practice for Curing Concrete
1.1 This specification covers materials in sheet form used
for covering the surfaces of hydraulic cement concrete to
3. Terminology
inhibit moisture loss during the curing period and, in the case
3.1 Definitions:
of the white reflective type materials, to also reduce tempera-
3.1.1 curing paper, n—a composite consisting of two layers
ture rise in concrete exposed to radiation from the sun. The
of kraft paper bonded together with a bituminous material and
following types are included:
reinforced with fiber, used for covering the surface of fresh
1.1.1 Curing Paper:
concrete to inhibit moisture loss during the curing period.
1.1.1.1 Regular.
1.1.1.2 White.
4. Ordering Information
1.1.2 Polyethylene Film:
4.1 The purchaser shall specify the type of curing material
1.1.2.1 Clear.
to be furnished under this specification.
1.1.2.2 White Opaque.
4.2 Lengths and widths of the rolls or mats of the sheet
1.1.3 White-Burlap-Polyethylene Sheet.
materials furnished shall be as agreed upon between the
1.2 The values stated in inch-pound units are to be regarded
purchaser and seller.
as the standard.
5. Performance Requirements
NOTE 1—This specification does not cover materials such as burlap,
cotton mats, or rugs used with additional applications of water to maintain
5.1 The sheet materials furnished under this specification
a water-saturated environment on such surfaces. Procedures employing
shall be tough, strong, resilient, and capable of withstanding
these materials are discussed in ACI 308.
normal job use without puncturing or tearing.
1.3 The text of this standard references notes and footnotes
5.2 The sheet material shall allow moisture loss of no more
which provide explanatory material. These notes and footnotes
than 0.55 kg/m in 72 h when testing according to Test Method
shall not be considered as requirements of the standard.
C 156.
5.3 The daylight reflectance of the white side of white
2. Referenced Documents
curing paper shall be at least 50 % when measured by Test
2.1 ASTM Standards:
Method E 1347. The daylight reflectance of white polyethylene
C 156 Test Method for Water Retention by Concrete Curing
film and the polyethylene side of white burlap-polyethylene
Materials
sheet shall be at least 70 % when measured according to Test
D 829 Test Methods for Wet Tensile Breaking Strength of
Method E 1347.
Paper and Paper Products
NOTE 2—Daylight reflectance is total luminous reflectance factor, CIE
D 882 Test Methods for Tensile Properties of Thin Plastic
tristimulus value Y for the CIE 1931 (2°) standard observer and CIE
Sheeting
standard illuminant C or D65.
D 2103 Specification for Polyethylene Film and Sheeting
E 1347 Test Method for Color and Color-Difference Mea-
6. Physical Requirements
surement by Tristimulus (Filter) Colorimetry
6.1 Curing Paper shall consist of two sheets of kraft paper
cemented together with a bituminous material in which are
This specification is under the jurisdiction of ASTM Committee C-9 on
embedded cords or strands of fiber running in both directions
Concrete and Concrete Aggregatesand is the direct responsibility of Subcommittee
and not more than 1 ⁄4 in. (32 mm) apart. The paper shall be
C09.22on Curing Materials.
light in color, shall be free of visible
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