1、Designation: C1804 14Standard 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 year
2、 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.1. Scope1.1 This specification covers spun cast prestressed concretebases used in lighting structures.1.2 UnitsThe values stat
3、ed 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 Prestressed ConcreteA615/A615M Specification for Deformed
4、and Plain Carbon-Steel Bars for Concrete ReinforcementA496/A496M Specification for Steel Wire, Deformed, forConcrete Reinforcement (Withdrawn 2013)3A617/A617M Specification for Axle-Steel Deformed andPlain Bars for Concrete Reinforcement (Withdrawn1999)3A641/A641M Specification for ZincCoated (Galva
5、nized)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 Zinc and Zinc-Aluminum (ZA) AlloyFoundry and Die CastingsC
6、31/C31M Practice for Making and Curing Concrete TestSpecimens in the FieldC33 Specification for Concrete AggregatesC39/C39M Test Method for Compressive Strength of Cylin-drical Concrete SpecimensC42/C42M Test Method for Obtaining and Testing DrilledCores and Sawed Beams of ConcreteC143 Test Method f
7、or Slump of Hydraulic-Cement ConcreteC150 Specification for Portland CementC172 Practice for Sampling Freshly Mixed ConcreteC192 Practice for Making and Curing Concrete Test Speci-mens in the LaboratoryC260 Specification for Air-Entraining Admixtures for Con-creteC289 Test Method for Potential Alkal
8、i-Silica Reactivity ofAggregates (Chemical Method)C330 Specification for Lightweight Aggregates for Struc-tural ConcreteC494 Specification for Chemical Admixtures for ConcreteC595 Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for U
9、se in ConcreteC989 Specification for Slag Cement for Use in Concrete andMortarsC1064 Test Method for Temperature of Freshly MixedHydraulic-Cement ConcreteC1089 Specification for Spun Cast Prestressed ConcretePolesC1157 Performance Specification for Hydraulic CementC1240 Specification for Silica Fume
10、 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 ASCE7 Standard:5Minimum Design Loads for Buildings and Other Structures1This test
11、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.Current edition approved Nov. 1, 2014. Published November 2014. DOI:10.1520/C1804-14.2For referenced ASTM standards, visi
12、t 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available fr
13、om American Association of State Highway and TransportationOfficials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,http:/www.transportation.org.5Available from American Society of Civil Engineers (ASCE), 1801 AlexanderBell Dr., Reston, VA 20191, http:/www.asce.org.Copyright ASTM
14、International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.4 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
15、 enough magnitude to produce a tensile stress greaterthan the 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.
16、3 spun basea base in which the concrete is distributedand compacted 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
17、 or steel will reachits limiting state.4. Basis of Acceptance4.1 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.
18、 Themanufacturer shall certify that the cement, aggregates,admixtures, 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
19、thisspecification, shall be verified by the results of full 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.
20、Materials5.1 CementPortland cement shall conform to the require-ments of Specification C150 or shall be portland blast-furnaceslag cement or portland-pozzolan cement conforming to therequirements of Specification C595. Performance cement forspecific use shall conform to Specification C1157.5.1.1 Sup
21、plementary Cementitious MaterialsFly ash shallconform to the requirements of Specification C618. Slagcement (ground granulated blast furnace slag) shall conform tothe requirements of Specification C989. Silica fume shallconform to Specification C1240.5.2 AggregateAggregates shall conform to Specific
22、ationC33 except that the requirements for grading shall not apply. Ifa producer can demonstrate that aggregates conforming toSpecification C330 could be used to manufacture an acceptableproduct, those aggregates may be used.5.3 WaterWater used for mixing concrete shall be free ofoils, organic matter
23、, and other substances 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.Air-entraining admixtures sh
24、all conform toSpecification C260. Admixtures shall not cause the chlorideion content of the concrete to exceed 0.06 % by mass ofcementitious materials.5.5 SteelPrestressing steel shall conform to SpecificationA416/A416M, A421/A421M,orA722/A722M. Nontensionedlongitudinal reinforcement shall conform t
25、o SpecificationA615/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 a
26、luminum 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 o
27、verlongitudinal 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
28、 top 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
29、 prestress 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-cret
30、e used 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 C172.6.1.7 If required by the purchaser, air entrainment of con-crete shall be in
31、 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 (2.4). Where local codesso require, seismic loads shall be considered in the design ofbases. Bases shal
32、l be proportioned so that loads produced bythe manufacturing process, transportation, and installation, aswell as dead and live loads, will not be detrimental to thestrength, serviceability requirements, and aesthetics of thestructure.C1804 1426.2.2 Unless local codes or agency standards requireothe
33、rwise, 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 simu
34、late 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. Toler
35、ances8.1 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 vary b
36、yno 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 var
37、yno 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 Placem
38、ent: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 bottom t
39、o 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 designate
40、d 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 informati
41、on,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 ma
42、terials, 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. Alltests and inspection are
43、to be conducted so as not to interfereunnecessarily with the manufacture and delivery of the base.FIG. 1 Concrete Base DetailC1804 143ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standa
44、rd 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 andif
45、 not revised, either reapproved or withdrawn. Your comments are invited either for revision of this 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, whi
46、ch you may attend. If you feel that your comments have not received a fair hearing you shouldmake your 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,U
47、nited 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:/ 144
