1、Designation: C 1372 04e2Standard Specification forDry-Cast Segmental Retaining Wall Units1This standard is issued under the fixed designation C 1372; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A numb
2、er in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTEAn editorial change was made to the title in June 2004.e2NOTEA heading in Table 1 was editorially corrected in March 2007.1. Scope*1.1 This spec
3、ification covers dry-cast segmental retainingwall units of concrete, machinemade from hydraulic cement,water, and suitable mineral aggregates with or without theinclusion of other materials. The units are intended for use inthe construction of mortarless segmental retaining walls.NOTE 1When particul
4、ar features are desired, such as weight classifi-cation, higher compressive strength, surface texture, finish, color, or otherspecial features, such properties should be specified separately by thepurchaser. Local suppliers should be consulted as to availability of unitshaving the desired features.1
5、.2 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be consideredas requirements of the standard.1.3 The values stated in inch-pound units are to be regardedas the standard. The valu
6、es given in parentheses are forinformation only.2. Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC 140 Test Methods for Sampling and Testing ConcreteMasonry Units and Related UnitsC 150 Specification for Portland CementC 331 Specification for Lightweight Aggregates
7、 for Con-crete Masonry UnitsC 595 Specification for Blended Hydraulic CementsC 618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC 989 Specification for Ground Granulated Blast-FurnaceSlag for Use in Concrete and MortarsC 1157 Performance Specification for Hyd
8、raulic CementC 1209 Terminology of Concrete Masonry Units and Re-lated UnitsC 1232 Terminology of MasonryC 1262 Test Method for Evaluating the Freeze-Thaw Dura-bility of Manufactured Concrete Masonry Units and Re-lated Concrete Units3. Terminology3.1 Terminology defined in Terminology C 1209 and Ter
9、-minology C 1232 shall apply for this specification.3.2 Definitions:3.2.1 Dry-cast, adjmanufacturing concrete products usinglow frequency, high amplitude vibration to consolidate con-crete of stiff or extremely dry consistency in a form.3.2.2 segmental retaining wall unit, nunit manufacturedof concr
10、ete for the construction of dry-stacked earth retainingwalls.3.2.3 segmental retaining wall unit, dry-cast, na segmen-tal retaining wall unit manufactured of concrete using adry-cast process.4. Materials4.1 Cementitious MaterialsMaterials shall conform to thefollowing applicable specifications:4.1.1
11、 Portland CementsSpecification C 150.4.1.2 Modified Portland CementPortland cement con-forming to Specification C 150, modified as follows:4.1.2.1 LimestoneLimestone, with a minimum 85 % Cal-cium Carbonate (CaCO3) content, shall be permitted to beadded to the cement, provided these requirements of S
12、pecifi-cation C 150 as modified are met:(1) Limitation on Insoluble Residue1.5 %.(2) Limitation on Air Content of MortarVolume percent,22 % max.(3) Limitation on Loss of Ignition7 %.4.1.3 Blended Hydraulic Cements Specification C 595.4.1.4 Hydraulic CementSpecification C 1157.1This specification is
13、under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and is the direct responsibility of C15.03 on ConcreteMasonry Units and Related UnitsCurrent edition approved Jan. 1, 2004. Published February 2004. Originallyapproved in 1997. Last previous edition approved in 2003 as C 1372
14、03.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this
15、standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.5 PozzolansSpecification C 618.4.1.6 Blast Furnace Slag CementSpecification C 989.4.2 AggregatesAggregates shall conform to the followingspecifications, except that grading
16、requirements shall notnecessarily apply:4.2.1 Normal Weight AggregatesSpecification C33.4.2.2 Lightweight AggregatesSpecification C 331.4.3 Other ConstituentsAir-entraining agents, coloringpigments, integral water repellents, finely ground silica, andother constituents shall be previously establishe
17、d as suitable foruse in segmental retaining wall units and shall conform toapplicable ASTM standards or shall be shown by test orexperience to be not detrimental to the durability of thesegmental retaining wall units or any material customarily usedin segmental retaining wall construction.5. Physica
18、l Requirements5.1 At the time of delivery to the work site, the units shallconform to the physical requirements of Table 1 when tested inaccordance with 8.2.5.2 Freeze-Thaw DurabilityIn areas where repeatedfreezing and thawing under saturated conditions occur, freeze-thaw durability shall be demonst
19、rated by test or by proven fieldperformance that the segmental retaining wall units haveadequate durability for the intended use. When testing isrequired by the specifier to demonstrate freeze-thaw durability,the units shall be tested in accordance with 8.3.5.2.1 Specimens shall comply with either o
20、f the following:(1) the weight loss of each of five test specimens at theconclusion of 100 cycles shall not exceed1%ofitsinitialweight; or (2) the weight loss of each of four of the five testspecimens at the conclusion of 150 cycles shall not exceed1.5 % of its initial weight.6. Permissible Variatio
21、ns in Dimensions6.1 Overall dimensions for width, height, and length shalldiffer by not more than 618 in. (3.2 mm) from the specifiedstandard dimensions.NOTE 2The term “width” refers to the horizontal dimension of theunit measured perpendicular to the face of the wall from the exposedsurface of the
22、unit to the back of the unit. The term “height” refers to thevertical dimension of the unit as placed in the wall. The term “length”refers to the horizontal dimension of the unit measured parallel to therunning length of the wall.6.1.1 Dimensional tolerance requirements for width shall bewaived for
23、architectural surfaces.NOTE 3Split-faced surfaces are the most common surfaces used toprovide an architectural appearance to segmental retaining walls. How-ever, other means could be used to obtain similar architectural effects liketumbling, grinding, and slumping.7. Finish and Appearance7.1 All uni
24、ts shall be sound and free of cracks or otherdefects that interfere with the proper placement of the unit orsignificantly impair the strength or permanence of the construc-tion. Minor cracks incidental to the usual method of manufac-ture or minor chipping resulting from customary methods ofhandling
25、in shipment and delivery, are not grounds for rejec-tion.7.2 Where units are to be used in exposed wall construction,the face or faces that are to be exposed shall not show chips orcracks, not otherwise permitted, or other imperfections whenviewed from a distance of not less than 20 ft (6.1 m) under
26、diffused lighting.7.2.1 Five percent of a shipment containing chips not largerthan 1 in. (25.4 mm) in any dimension, or cracks not wider than0.02 in. (0.5 mm) and not longer than 25 % of the nominalheight of the unit is permitted.7.3 The color and texture of units shall be specified by thepurchaser.
27、 The finished surface that will be exposed in placeshall conform to an approved sample consisting of not less thanfour units, representing the range of texture and color permit-ted.8. Sampling and Testing8.1 The purchaser or authorized representative shall beaccorded proper facilities to inspect and
28、 sample units at theplace of manufacture from the lots ready for delivery.8.2 Sample and test units for compressive strength, absorp-tion, and dimensional tolerances in accordance with TestMethods C 140.8.3 When required, sample and test five specimens forfreeze-thaw durability in water in accordanc
29、e with Test MethodC 1262. Freeze-thaw durability shall be based on tests of unitsmade with the same materials, concrete mix design, manufac-turing process, and curing method, conducted not more than 24months prior to delivery.9. Compliance9.1 If a sample fails to conform to the specified require-men
30、ts, the manufacturer shall be permitted to remove unitsfrom the shipment. A new sample shall be selected by thepurchaser from remaining units from the shipment with asimilar configuration and dimension and tested at the expenseof the manufacturer. If the second sample meets the specifiedrequirements
31、, the remaining portion of the shipment repre-sented by the sample meets the specified requirements. If thesecond sample fails to meet the specified requirements, theremaining portion of the shipment represented by the samplefails to meet the specified requirements.NOTE 4Unless otherwise specified i
32、n the purchase order, the cost ofTABLE 1 Strength and Absorption RequirementsMinimum Net Area Compressive Strength, lb/in.2(MPa) Maximum Water Absorption Requirements lb/ft3(kg/m3)Weight Classification Oven-Dry Density of Concrete lb/ft3(kg/m3)Average of 3 Units Individual Unit Lightweight: Less tha
33、n105 (1682)Medium Weight: 105 (1682)to less than 125 (2002)Normal Weight: 125(2002) or more3000 (20.7) 2500 (17.2) 18 (288) 15 (240) 13 (208)C 1372 04e22tests is typically borne as follows: (1) if the results of the tests show thatthe units do not conform to the requirements of this specification, t
34、he costis typically borne by the seller; (2) if the results of the tests show that theunits conform to the specification requirements, the cost is typically borneby the purchaser.10. Keywords10.1 absorption; aggregates; cementitious materials; com-pressive strength; concrete masonry units; dimension
35、s; dura-bility; weight classificationSUMMARY OF CHANGESCommittee C15 has identified the location of selected changes to this standard since the last issue (C 137203)that may impact the use of this standard.(1) Changes were made to title, scope, and terminology toclarify that this standard applies to
36、 units made using dry-castprocess.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risko
37、f infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this
38、standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake yo
39、ur views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).C 1372 04e23
