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ASTM C915-79(2002)

(Specification)

Standard Specification for Precast Reinforced Concrete Crib Wall Members

Standard Specification for Precast Reinforced Concrete Crib Wall Members

ABSTRACT
This specification covers open- and closed-face precast reinforced concrete crib wall members for earth-retaining structures or protection against stream encroachment. The concrete crib wall shall conform to the dimensions prescribed in this specification. Manufacturing materials shall include portland cement, aggregates, chemical admixtures, water, and steel reinforcement. Manufacturing shall conform to the procedures which include mixing, reinforcement-concrete placing, forming, curing, cleaning, oiling, and finishing. Compression tests shall be made on standard concrete cylinders and shall conform to the design strength indicated in this specification.
SCOPE
1.1 This specification covers open- and closed-face precast reinforced concrete crib walls intended to act as earth-retaining structures or as protection against stream encroachment.
Note 1—This specification is a manufacturing and purchase specification only, with examples and suggestions for usage. Successful performance of this product depends on the proper selection and assembling of members, proper foundation and bearing material, and consideration of backfill heights, backfill material, drainage, and other engineering and construction considerations. The purchaser of the crib wall members specified herein is cautioned that he must properly correlate the field requirements with the members selected and provide adequate inspection at the construction site.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

General Information

Status
Historical
Publication Date
04-Nov-1979
ICS
91.100.30 - Concrete and concrete products
Technical Committee
C27 - Precast Concrete Products
Drafting Committee
C27.20 - Architectural and Structural Products
Current Stage
Ref Project

Relations

Replaces
ASTM C915-79(1995) - Standard Specification for Precast Reinforced Concrete Crib Wall Members
Effective Date
05-Nov-1979
Replaced By
ASTM C915-79(2010) - Standard Specification for Precast Reinforced Concrete Crib Wall Members
Effective Date
01-Jul-2010

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ASTM C915-79(2002) - Standard Specification for Precast Reinforced Concrete Crib Wall MembersASTM C915-79(2002) - Standard Specification for Precast Reinforced Concrete Crib Wall Members
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ASTM C915-79(2002) - Standard Specification for Precast Reinforced Concrete Crib Wall Members
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Standards Content (Sample)


NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C915 – 79 (Reapproved 2002)
Standard Specification for
Precast Reinforced Concrete Crib Wall Members
This standard is issued under the fixed designation C915; 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.
1. Scope C42/C42M Test Method for Obtaining and Testing Drilled
Cores and Sawed Beams of Concrete
1.1 This specification covers open- and closed-face precast
C94/C94M Specification for Ready-Mixed Concrete
reinforced concrete crib walls intended to act as earth-retaining
C150 Specification for Portland Cement
structures or as protection against stream encroachment.
C173/C173M Test Method for Air Content of Freshly
NOTE 1—This specification is a manufacturing and purchase specifica-
Mixed Concrete by the Volumetric Method
tion only, with examples and suggestions for usage. Successful perfor-
C231 Test Method for Air Content of Freshly Mixed Con-
mance of this product depends on the proper selection and assembling of
crete by the Pressure Method
members, proper foundation and bearing material, and consideration of
C260 Specification for Air-Entraining Admixtures for Con-
backfill heights, backfill material, drainage, and other engineering and
crete
construction considerations. The purchaser of the crib wall members
specified herein is cautioned that he must properly correlate the field
C309 Specification for Liquid Membrane-Forming Com-
requirements with the members selected and provide adequate inspection
pounds for Curing Concrete
at the construction site.
C330 Specification for Lightweight Aggregates for Struc-
1.2 The values stated in inch-pound units are to be regarded tural Concrete
as the standard. The values given in parentheses are for
C494/C494M Specification for Chemical Admixtures for
information only. Concrete
C595 Specification for Blended Hydraulic Cements
2. Referenced Documents
C618 Specification for Coal Fly Ash and Raw or Calcined
2.1 ASTM Standards:
Natural Pozzolan for Use in Concrete
A370 Test Methods and Definitions for Mechanical Testing
3. Classification
of Steel Products
A615/A615M Specification for Deformed and Plain 3.1 Cribbing manufactured in accordance with this specifi-
Carbon-Steel Bars for Concrete Reinforcement
cation shall be of open- or closed-face design and shall
A616/A616M Specification for Rail-Steel Deformed and conform to the standard designs shown in Figs. 1-4.
Plain Bars for Concrete Reinforcement
4. Ordering Information
A617/A617M Specification for Axle-Steel Deformed and
Plain Bars for Concrete Reinforcement 4.1 Acceptability of the crib wall members in all cross
C31/C31M Practice for Making and Curing Concrete Test sections and lengths produced in accordance with Section 6
Specimens in the Field shallbedeterminedbytheresultsofcylindercompressiontests
C33 Specification for Concrete Aggregates of the placed concrete and mill certificates for the reinforcing
C39/C39M Test Method for Compressive Strength of Cy- steel and cement. A written statement, signed by the manufac-
lindrical Concrete Specimens turer, shall verify that the cement, aggregate, admixtures, and
reinforcing steel conform to the specifications for materials in
Section 5 and that the preparation of equipment, mixing,
This specification is under the jurisdiction ofASTM Committee C27 on Precast
conveying, placing, consolidating, and curing meet require-
Concrete Products and is the direct responsibility of Subcommittee C27.20 on
ments of the applicable standard specifications. The concrete
Architectural and Structural Products.
strength as determined by the cylinder compression tests shall
Current edition approved Nov. 5, 1979. Published January 1980. DOI: 10.1520/
C0915-79R02.
be as specified in 6.3, and the test method shall conform to the
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
requirements of Test Method C39/C39M. The manufacturer’s
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
statement shall also certify adherence to tolerance dimensions
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. of Section 9.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C915 – 79 (2002)
NOTE 1—Surface drainage should not be permitted to flow directly against the face of the cribbing.
NOTE 2—Walls should be separated into 96-ft sections by the provision of double rows of headers.
NOTE 3—In using these typical sections for designing walls of intermediate height, the drawing should be read from the top down until the desired
height is reached. Base details are repeated for intermediate heights.
NOTE 4—In areas of aggressive environment, Type II cement or protective coatings, or both, may need to be used to avoid deterioration of the walls.
3 3
NOTE 5—Metric Conversion: 1 ft = 304.8 1 in. = 25.4 mm 1 lb = 0.453592 kg 1 ft = 0.028317 m
FIG. 1 Open-Faced Concrete Crib Wall
4.2 Acceptability of the concrete strength of completed other substances that may be deleterious to concrete or steel; it
cribbing produced in accordance with Section 6 may also be should not contain concentrations of chlorides in excess of
determined by compressive tests of concrete cores in accor- 1000 ppm or sulfates in excess of 1000 ppm.
dance with Test Method C42/C42M. 5.4.1 Ifwaterofhigherchloridecontentisusedbyreasonof
nonavailability of water of recommended quality, the manu-
5. Materials
facturer must obtain approval from the user.
5.1 Cement—Portland cement shall conform to the require-
5.5 Steel Reinforcement—Steel reinforcement shall consist
ments of Specification C150 or shall be portland blast-furnace
of bars conforming to Specifications A615/A615M, A616/
slag cement or portland-pozzolan cement conforming to the
A616M,or A617/A617M.
requirements of Specification C595.
6. Design
5.2 Aggregates—Aggregates shall conform to Specification
C33 or C330. The nominal maximum size aggregate shall not 6.1 Precast concrete crib wall members shall conform to
be greater than ⁄4 in. (19.0 mm). details and dimensions prescribed in Figs. 1-4, subject to the
5.3 Admixtures—Air-entraining admixtures shall conform provisions of this section and Section 10.
to Specification C260. Chemical admixtures shall conform to 6.2 Reinforcement—Minimum reinforcement shall be as
Specification C494/C494M. Fly ash or other pozzolanic ad- shown in Fig. 2 and Fig. 4 and shall be Grade 40 or 60.
mixtures shall conform to the requirements of Specification 6.3 Concrete—Concrete shall have a minimum design com-
C618. pressive strength of 4000 psi (28 MPa) in 28 days.
5.4 Water—Water used for curing, washing aggregates, and 6.4 Concrete Cover—Theminimumconcretecoveroverthe
mixing concrete shall be free of oils, organic materials, and reinforcement shall be 1 ⁄4 in. (32 mm).
C915 – 79 (2002)
NOTE 1—All reinforcing to be No. 3 bars placed 1 ⁄4 in. clear from surface of concrete.
NOTE 2—Bars to be held in position by chairs having noncorrosive tips.
NOTE 3—Blocks shall be set in cement-sand mortar (1 to 3).
NOTE 4—Backfilling should follow closely the erection of the successive tiers of units, and the wall should not be erected higher than 3 ft above the
backfilled portion at any time.
NOTE 5—Gravel, crushed stone, or other granular material meeting the users’ specifications may be used as backfill material. Rock may also be used,
but care should be used to avoid damaging or dislodging the crib units. Clay or material having a large percentage of clay is not to be used.
NOTE 6—Cribbing should be placed on a foundation of firm bearing material. This foundation should be at least 3 ft below the surface of the ground,
beyondalldangeroffrost,unlessonsolidrock.Ifthestretchersarelocateddirectlyaboverock,acushionofsandorgravelnotlessthan6in.thickshould
be provided.
NOTE 7—All headers are placed at 6 ft 0 in. center to center.
NOTE 8—Details of steps are similar to those shown on Fig. 4.
FIG. 2 Open-Faced Concrete Crib Wall
6.5 Air Entrainment—Unless otherwise specified by the taken to fill all parts of the forms, and to place concrete under
1 1
purchaser, all concrete shall have an air content of 6 ⁄
...

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