1、Designation: C1804 141Standard Specification forSpun Cast Prestressed Concrete Bases for Tapered SteelLighting Poles1This standard is issued under the fixed designation C1804; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea
2、r of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTEEditorial changes were made throughout in April 2015.1. Scope1.1 This specification covers spun cast prestressed concret
3、ebases used in lighting structures.1.2 UnitsThe values stated in SI units are to be regardedas standard.2. Referenced Documents2.1 ASTM Standards:2A416/A416M Specification for Steel Strand, UncoatedSeven-Wire for Prestressed ConcreteA421/A421M Specification for Uncoated Stress-RelievedSteel Wire for
4、 Prestressed ConcreteA496/A496M Specification for Steel Wire, Deformed, forConcrete Reinforcement (Withdrawn 2013)3A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete ReinforcementA617/A617M Specification for Axle-Steel Deformed andPlain Bars for Concrete Reinforcement (Wi
5、thdrawn1999)3A641/A641M Specification for ZincCoated (Galvanized)Carbon Steel WireA722/A722M Specification for Uncoated High-StrengthSteel Bars for Prestressing ConcreteA1064/A1064M Specification for Carbon-Steel Wire andWelded Wire Reinforcement, Plain and Deformed, forConcreteB86 Specification for
6、 Zinc and Zinc-Aluminum (ZA) AlloyFoundry and Die CastingsC31/C31M Practice for Making and Curing Concrete TestSpecimens in the FieldC33/C33M Specification for Concrete AggregatesC39/C39M Test Method for Compressive Strength of Cylin-drical Concrete SpecimensC42/C42M Test Method for Obtaining and Te
7、sting DrilledCores and Sawed Beams of ConcreteC150/C150M Specification for Portland CementC172/C172M Practice for Sampling Freshly Mixed Con-creteC260/C260M Specification for Air-Entraining Admixturesfor ConcreteC330/C330M Specification for Lightweight Aggregates forStructural ConcreteC494/C494M Spe
8、cification for Chemical Admixtures forConcreteC595/C595M Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC989/C989M Specification for Slag Cement for Use inConcrete and MortarsC1157/C1157M Performance Specification
9、 for HydraulicCementC1240 Specification for Silica Fume Used in CementitiousMixturesF593 Specification for Stainless Steel Bolts, Hex CapScrews, and Studs2.2 AASHTO Standard:Specification for Structural Supports for Highway Signs,Luminaries and Traffic Signals (LTS-6)42.3 ACI Standard:5ACI 301 Speci
10、fications for Structural Concrete2.4 ASCE7 Standard:6Minimum Design Loads for Buildings and Other Structures1This test method is under the jurisdiction of ASTM Committee C27 on PrecastConcrete Products and is the direct responsibility of Subcommittee C27.20 onArchitectural and Structural Products.Cu
11、rrent edition approved Nov. 1, 2014. Published November 2014. DOI:10.1520/C1804-14.2For 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 pa
12、ge onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American Association of State Highway and TransportationOfficials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,http:/www.transportation.org.5Available from A
13、merican Concrete Institute (ACI), P.O. Box 9094, FarmingtonHills, MI 48333-9094, http:/www.concrete.org.6Available from American Society of Civil Engineers (ASCE), 1801 AlexanderBell Dr., Reston, VA 20191, http:/www.asce.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Cons
14、hohocken, PA 19428-2959. United States12.5 PCI Guides:Guide for Design of Prestressed Concrete PolesGuide Specification for Prestressed Concrete Poles3. Terminology3.1 Definitions:3.1.1 cracking loada load which creates a bending mo-ment of enough magnitude to produce a tensile stress greaterthan th
15、e sum of induced compression plus the tensile strengthof the concrete resulting in tensile cracks on the tension face ofthe base.3.1.2 cylindrical sectionlower portion of base designed tobe buried in concrete backfill below ground line.3.1.3 spun basea base in which the concrete is distributedand co
16、mpacted through centrifugal force.3.1.4 tapered sectionupper portion of base, which has ataper designed to match overlapping steel pole taper.3.1.5 ultimate loadmaximum load the base will carry inthe specified direction, before the concrete or steel will reachits limiting state.4. Basis of Acceptanc
17、e4.1 Acceptability of spun prestressed concrete bases pro-duced in accordance with this specification shall be determinedby the test results of compressive strength tests of concretecylinders and mill certificates for the reinforcing steel. Themanufacturer shall certify that the cement, aggregates,a
18、dmixtures, and steel shall conform to the applicable specifi-cation for each material. The manufacturer shall also certifyadherence to tolerance on dimensions and mass. In addition theacceptability of the bases, produced in accordance with thisspecification, shall be verified by the results of full
19、scalebending tests. The purchaser shall specify the number andfrequency of full-scale tests. Bases shall be accepted on thebasis of producer certifications and historical test data offull-scale bending and tests on equal or larger bases.5. Materials5.1 CementPortland cement shall conform to the requ
20、ire-ments of Specification C150/C150M or shall be portlandblast-furnace slag cement or portland-pozzolan cement con-forming to the requirements of Specification C595/C595M.Performance cement for specific use shall conform to Specifi-cation C1157/C1157M.5.1.1 Supplementary Cementitious MaterialsFly a
21、sh shallconform to the requirements of Specification C618. Slagcement (ground granulated blast furnace slag) shall conform tothe requirements of Specification C989/C989M. Silica fumeshall conform to Specification C1240.5.2 AggregateAggregates shall conform to SpecificationC33/C33M except that the re
22、quirements for grading shall notapply. If a producer can demonstrate that aggregates conform-ing to Specification C330/C330M could be used to manufac-ture an acceptable product, those aggregates may be used.5.3 WaterWater used for mixing concrete shall be free ofoils, organic matter, and other subst
23、ances in amounts that maybe deleterious to concrete or reinforcing steel, and it shall notcontain concentration of chloride ions in excess of 500 ppm orsulfate ions in excess of 1000 ppm.5.4 AdmixtureChemical admixtures shall conform toSpecification C494/C494M. Air-entraining admixtures shallconform
24、 to Specification C260/C260M. Admixtures shall notcause the chloride ion content of the concrete to exceed 0.06 %by mass of cementitious materials.5.5 SteelPrestressing steel shall conform to SpecificationA416/A416M, A421/A421M,orA722/A722M. Nontensionedlongitudinal reinforcement shall conform to Sp
25、ecificationA615/A615M, A617/A617M,orA496/A496M. Circumferen-tial wire reinforcement shall conform to Specification A1064/A1064M, A496/A496M,orA641/A641M.5.6 All inserts shall be made from zinc alloy in accordancewith Specification B86 or stainless steel in accordance withSpecification F593. No alumi
26、num inserts shall be allowed.5.7 The top and bottom ends of the bases shall be sealed toprevent ground or rain water from wicking into the strand ends.The sealing compound shall be specified by the purchaser.6. Requirements6.1 General Requirements:6.1.1 Concrete CoverThe minimum concrete cover overl
27、ongitudinal reinforcing steel shall be34 in. (19 mm). Theconcrete cover can be reduced to58 in. (16 mm) minimum forportions of the base not exposed to soil or weather.6.1.2 Circumferential WireCircumferential wire spacingshall be 3 in. (76 mm) nominal, except at the ends (measuredfrom either the top
28、 or bottom to a distance of 1 ft (305 mm)where the nominal spacing shall be 1 in. (25 mm).6.1.3 GroundingThe purchaser shall specify any ground-ing requirements needed.6.1.4 Exterior Surface TreatmentExterior concrete surfacefinish shall be as specified by the purchaser.6.1.5 PrestressingInitial pre
29、stress shall not be releaseduntil the concrete strength has reached the greater of 4500 psi(31 MPa) or 1.67 times the maximum expected stress in theconcrete due to the prestressing forces immediately aftertransfer and before losses occur.6.1.6 The minimum 28-day compressive strength for con-crete us
30、ed in bases shall be 9000 psi (62 MPa) as determinedusing Test Method C39/C39M or C42/C42M, or as specified bythe purchaser. The cylinders for compression tests shall bemade in accordance with Practice C31/C31M and C172/C172M.6.1.7 If required by the purchaser, air entrainment of con-crete shall be
31、in accordance to ACI 301.6.2 Load Requirements:6.2.1 Bases shall be designed to withstand ultimate load.Ultimate capacity of the base shall be determined in accor-dance with the PCI Guide for Design (2.5). Where local codesso require, seismic loads shall be considered in the design ofbases. Bases sh
32、all be proportioned so that loads produced bythe manufacturing process, transportation, and installation, asC1804 1412well as dead and live loads, will not be detrimental to thestrength, serviceability requirements, and aesthetics of thestructure.6.2.2 Unless local codes or agency standards requireo
33、therwise, one of the following loading criteria shall apply:6.2.2.1 AASHTO loading criteria.6.2.2.2 ASCE7 loading criteria.7. Bending Test Procedures7.1 The bases shall be tested in a horizontal position.7.2 The method of attaching the test loads to producebending and applying the test loads shall s
34、imulate actual lightstructure loading. Test procedure and types of measurementsshall be approved by the purchaser before testing begins.7.3 The producer shall furnish the purchaser copies of thetest report. This report shall include all recorded test data aswell as drawings describing the test.8. To
35、lerances8.1 The following tolerances are based on experience withthe spun base manufacturing process:8.1.1 Length shall vary by no more than 2 in. (50 mm) or 1in. (25 mm) plus14 in. (6 mm) per 10 ft (3 m), whichever isgreater.8.1.2 Cross Section:8.1.2.1 Outside Diameter Cylindrical Section shall var
36、y byno more than14 in. (6 mm).8.1.2.2 Outside Diameter Tapered Section shall vary by nomore than116 in. (1.6 mm).8.1.2.3 Wall Thickness shall vary by no more than minus12 % of the design thickness or no more than14 in. (6 mm),whichever is greater.8.1.3 Deviation from Longitudinal Axis (Sweep) shall
37、varyno more than14 in. (6 mm) per 10 ft (3 m) of length, applicablefor the entire length or any segment thereof.8.1.4 End Squareness shall vary no more than14 in. (6 mm)per 1 ft (305 mm) of diameter.8.1.5 Mass shall vary no more than minus 10 % and plus20 % of the design mass.8.1.6 Reinforcement Pla
38、cement:8.1.6.1 Longitudinal Reinforcement shall vary no more than14 in. (6 mm) for individual elements and no more than18 in.(3 mm) for the centroid of a group.8.1.6.2 Spiral Reinforcement shall be within 6114 in. (32mm) of its specified location, except at the ends (measuredfrom either top or botto
39、m to a distance of 1 ft (305 mm) wherethe spacing location shall be within 614 in. (6 mm). Thenumber of spirals of circumferential wire along any 3 ft (0.9 m)of length shall not be less than required by design.8.1.7 Longitudinal Aperture Placement shall vary no morethan 2 in. (50 mm) from the design
40、ated location.9. Drawings9.1 The producer shall furnish the purchaser with drawingsthat shall include the following information (see Fig. 1):9.1.1 Size dimensions,9.1.2 Description and of the steel reinforcement,9.1.3 Twenty-eight-day strength of the concrete,9.1.4 All the necessary stressing inform
41、ation,9.1.5 Size, description, quantity, and location of allopenings,9.1.6 Ultimate moment at the ground line or the mostcritical section along the pole length,9.1.7 Marking of the poles as specified, and9.1.8 Any other special information required by the pur-chaser.10. Inspection10.1 The quality of
42、 materials, the process of manufacture,and the finished bases shall be subject to inspection andapproval by the specifying purchaser. The producer shall affordthe purchaser reasonable access for making the necessarychecks of the production facilities and any required tests. AllFIG. 1 Concrete Base D
43、etailC1804 1413tests and inspection are to be conducted so as not to interfereunnecessarily with the manufacture and delivery of the base.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this st
44、andard are expressly advised that determination of the validity of any such patent rights, and the riskof 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 a
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47、59,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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1414
