ASTM C1170 C1170M-2014 Standard Test Method for Determining Consistency and Density of Roller-Compacted Concrete Using a Vibrating Table《用振动台测定碾压混凝土一致性和密度的标准试验方法》.pdf

《ASTM C1170 C1170M-2014 Standard Test Method for Determining Consistency and Density of Roller-Compacted Concrete Using a Vibrating Table《用振动台测定碾压混凝土一致性和密度的标准试验方法》.pdf》由会员分享，可在线阅读，更多相关《ASTM C1170 C1170M-2014 Standard Test Method for Determining Consistency and Density of Roller-Compacted Concrete Using a Vibrating Table《用振动台测定碾压混凝土一致性和密度的标准试验方法》.pdf（8页珍藏版）》请在麦多课文档分享上搜索。

1、Designation: C1170/C1170M 08C1170/C1170M 14Standard Test Method forDetermining Consistency and Density of Roller-CompactedConcrete Using a Vibrating Table1This standard is issued under the fixed designation C1170/C1170M; the number immediately following the designation indicates the yearof original

2、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*1.1 This test method is used to determine the consistency of concrete u

3、sing a vibrating table and a surcharge and to determinethe density of the consolidated concrete specimen. This test method is applicable to freshly mixed concrete, prepared in both thelaboratory and the field, having a nominal maximum size aggregate of 50 mm 2 in. or less. If the nominal maximum siz

4、e ofaggregate is larger than 50 mm 2 in., the test method is applicable only when performed on the fraction passing the 50-mm 2-in.sieve with the larger aggregate being removed in accordance with Practice C172.1.2 This test method, intended for use in testing roller-compacted concrete, may be applic

5、able to testing other types of concretesuch as cement-treated aggregate and mixtures similar to soil-cement.1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system sha

6、ll be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish app

7、ropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.(Warning Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin andtissue upon prolonged exposure.2)2. Referenced Documents2.1 ASTM Standards:3C29/C29M Test Meth

8、od for Bulk Density (“Unit Weight”) and Voids in AggregateC125 Terminology Relating to Concrete and Concrete AggregatesC172 Practice for Sampling Freshly Mixed ConcreteC670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction MaterialsC1067 Practice for Conducting a

9、 Ruggedness Evaluation or Screening Program for Test Methods for Construction MaterialsD1557 Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3 (2,700kN-m/m3)E11 Specification for Woven Wire Test Sieve Cloth and Test SievesE177 Practice for Use of

10、 the Terms Precision and Bias in ASTM Test Methods3. Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method, refer to Terminology C125.3.2 Definitions of Terms Specific to This Standard:3.2.1 extremely dry consistency, nfor the purpose of this standard, the consistency of

11、 concrete having no slump and a Vebeconsistency greater than 2030 s when measured with Procedure A or B.A.1 This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and areis the direct responsibility of Subcommittee C09.45on Roller-Compacted Concrete.Curr

12、ent edition approved Oct. 1, 2008April 1, 2014. Published November 2008May 2014. Originally approved in 1991. Last previous edition approved in 20062008 asC1170 06.C1170 08. DOI: 10.1520/C1170_C1170M-08.10.1520/C1170_C1170M-14.2 Section on Safety Precautions, Manual of Aggregate and Concrete Testing

13、, Annual Book of ASTM Standards, Vol. 04.023 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is n

14、ot an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropria

15、te. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13

16、.2.2 stiff consistency, nnthe for the purpose of this standard, the consistency of concrete having a slump less than 25 mm1 inno slump and a Vebe consistency ranging from 5 to 1020 s when measured with Procedure A.B.3.2.3 Vebe consistency, nthe time required for a given mass of concrete to be consol

17、idated by vibration in a cylindricallyshaped mold under a surcharge mass.3.2.4 very stiff consistency, nfor the purpose of this standard, the consistency of concrete having no slump and a Vebeconsistency ranging from 1020 to 2030 s when measured with Procedure A.A or B.4. Summary of Test Method4.1 A

18、vibrating table is used to measure the consistency of stiff to extremely dry concrete mixtures (See Note 1). Density of thecompacted specimen is measured by determining the mass of the consolidated specimen and dividing by its volume.NOTE 1Further description of concrete of this consistency is given

19、 in ACI 207.5R4 and ACI 211.3R.54.2 Two procedures are provided:4.2.1 Procedure A uses a 22.7-kg 50-lb 22.7 kg 50 lb surcharge mass placed on top of the test specimen. Procedure A shallbe used for testing concrete of very stiff to extremely dry consistency or when the Vebe consistency by Procedure B

20、 is 30 s orgreater (See Note 2).NOTE 2Further description of the test procedure using a 22.7 kg 50 lb surcharge can be found in the U. S. Bureau of Reclamations TechnicalMemorandum No. 8.64.2.2 Procedure B uses a 12.5 kg 27.5 lb surcharge mass placed on top of the test specimen. Procedure B shall be

21、 used fortesting concrete of stiff to very stiff consistency or when the Vebe timeconsistency by Procedure AB is less than 20 s (See Note3).NOTE 3Further description of the test procedure using a 12.5 kg 27.5 lb surcharge can be found in the U. S.Army Corps of Engineers test procedureCRD-C-53-01.74.

22、2.3 Procedure Either procedure A or B can be used for a Vebe consistency between 20 andtesting concrete with a very stiffconsistency or when the Vebe consistency by Procedure A or B ranges from 20 to 30 s.5. Significance and Use5.1 This test method is intended to be used for determining the consiste

23、ncy and density of stiff to extremely dry concretemixtures common when using in roller-compacted concrete construction.5.1.1 Because of the stiff to extremely dry consistency of some roller-compacted concrete mixtures, the standard Vebe testmethod of rodding the specimen in a slump cone is substitut

24、ed by Procedures A and B.85.2 Procedure A uses a 22.7-kg 50-lb 22.7 kg 50 lb surcharge and is used for concrete consolidated by roller-compactionmethods when the consistency of the concrete is very stiff to extremely dry.5.3 Procedure B uses a 12.5-kg 27.5-lb 12.5 kg 27.5 lb surcharge and is used fo

25、r concrete consolidated by roller-compactionmethods when the consistency of the concrete is stiff to very stiff consistency, but not extremely dry.6. Apparatus6.1 Vibrating TableA vibrating table with a steel deck approximately 20-mm 34-in. thick with dimensions of approximately380 mm 15 in. in leng

26、th, 250 mm 10 in. in width, and 300 mm 12 in. in height. The vibrating table shall be constructed insuch a manner as to prevent flexing of the table during operation. The table deck shall be activated by an electromechanicalvibrator. The table shall produce a sinusoidal vibratory motion with a frequ

27、ency of at least 60 6 2 Hz 3600 6 100 vibrations permin and a double amplitude of vibration of 0.43 6 0.08 mm 0.0170 6 0.0030 in. when a 27 6 2-kg 60.0 6 2.5-lb surchargeis bolted to the center of the table. The vibrator and table shall have a total mass of at least 90 kg 200 lb. The table shall be

28、leveland clamped to a concrete floor or base slab that has sufficient mass have sufficient mass or be secured to prevent displacementof the apparatus during performance of the test.6.2 Cylindrical MoldThe cylindrical mold shall be made of steel or other hard metal resistant to corrosion by cement pa

29、steand shall have an inside diameter of 240 6 2 mm 9 12 6 116 in., a heightdepth of 200 6 2 mm 7 34 6 116 in., and a wall4 ACI 211.3R207.5R “Guide for Selecting Proportions for No-Slump “Report on Roller-Compacted Concrete,”, 2002.1999. Available from American Concrete Institute(ACI), P.O. Box 9094,

30、 Farmington Hills, MI 48333, www.concrete.org.5 ACI 207.5R211.3R “Report on Roller-Compacted “Guide for Selecting Proportions for No-Slump Concrete,”, 1999.2002. Available from American Concrete Institute(ACI), P.O. Box 9094, Farmington Hills, MI 48333, www.concrete.org.6 “Guidelines for Designing a

31、nd Constructing Roller-Compacted Concrete Dams,”ACER Technical Memorandum No. 8, Bureau of Reclamation, Denver, CO,AppendixA, 1987.7 “Test Method for Consistency of No-Slump Concrete Using the Modified Vebe Apparatus,” CRD-C-53-01, U. S. Army Corps of Engineers, Vicksburg, MS, 2001.8 ACI Manual of C

32、oncrete Practice, Part 1, Materials and General Properties of Concrete, 2005. Available from American Concrete Institute (ACI), P.O. Box 9094,Farmington Hills, MI 48333, www.concrete.org.C1170/C1170M 142thickness of 6 6 2 mm 14 6 116 in. The mold shall be equipped with permanently affixed slotted me

33、tal brackets so it can berigidly clamped to the vibrating table. The top rim of the mold shall be smooth, plane, and parallel to the bottom of the mold andshall be capable of providing an air and watertight seal when a glass or plastic plate is placed on the top rim.6.3 Swivel Arm and Guide SleeveA

34、metal guide sleeve with a clamp assembly or other suitable holding device mounted ona swivel arm (See Fig. 1). The swivel arm and guide sleeve must be capable of holding the metal shaft with the attached 22.7-kg50-lb or 12.5-kg 27.5-lb 22.7 kg 50 lb or 12.5 kg 27.5 lb cylindrical mass in a position

35、perpendicular to the vibrating surfaceand allowing the shaft to slide freely when the clamp is released. The inside diameter of the guide sleeve shall be 3 6 2 mm 186 116 in. larger than the diameter of the metal shaft of the surcharge. The swivel arm must be capable of maintaining the guidesleeve i

36、n a locked position directly over the center of the vibrating surface. The swivel arm shall be capable of being rotated awayfrom the center of the table.6.4 SurchargeSurcharge AssemblyAcylindrical steel mass with a circular plastic plate attached to its base and a metal shaftat least 450 mm 18 in. i

37、n length and 16 6 2 mm 58 6 116 in. in diameter attached perpendicularly to the plate and embeddedin the center of the mass. The shaft shall slide through the guide sleeve without binding. The plastic plate shall be approximately13 mm 12 in. in thickness and shall have a diameter of 230 6 3 mm 9 6 1

38、8 in. The edge of the plastic plate shall not be chippedor rounded. The surcharge assembly including the plastic plate and the metal shaft shall have a mass of either of the following:FIG. 1 Vibrating TableConsistency TestC1170/C1170M 143Procedure A22.7 6 0.5 kg 50 6 1 lb, orProcedure B12.5 6 0.5 kg

39、 27.5 lb 6 1 lb.6.4.1 The cylindrical steel mass shall include a minimum of six spacers affixed to the side of the mass. The spacers shall belocated at equal distances around the circumference of the mass (See Fig. 2). The center of each spacer shall be located a maximumdistance of 40 mm 1 58 in. fr

40、om the bottom of the plastic plate. Each spacer shall project from the side of the mass so that, whencentered in the cylindrical mold, each spacer almost touches the inside of the mold. The distance between each spacer and theinside of the mold shall not exceed 0.5 mm 0.02 in. when the mass is cente

41、red in the mold. The spacers shall not bind so thatthe centered mass with spacers is allowed to freely move up and down throughout the upper half of the mold (See Note 4). Thesurcharge assembly including the steel mass with spacers, plastic plate, and the metal shaft shall have a mass of 22.7 6 0.5

42、kg50 6 1 lb or 12.5 6 0.5 kg 27.5 lb 6 1 lb.NOTE 4It is advisable that the spacers be made of material that is softer than the steel used to make the cylindrical mold to avoid damage to the mold.Bolts made of nylon or brass may be used for spacers. The cylindrical steel mass can be drilled and tappe

43、d at each spacer location to receive the bolt.Washers or nuts may be added or the bolt heads milled to adjust the distance between each spacer and the inside of the mold.6.5 Balance or ScaleBalance or scale of sufficient capacity to determine the total mass of the concrete specimen and the mold.The

44、balance or scale shall be readable to the nearest 5 g 0.01 lb.6.6 Strike-Off PlateA flat square metal plate at least 6 mm 14 in. thick, or a glass or clear plastic plate at least 13 mm 12in. thick, and at least 50 mm 2 in. larger than the diameter of the cylindrical mold.6.7 SieveA 50-mm 2-in. sieve

45、 conforming to Specification E11.6.8 Timing DeviceA stopwatch, capable of recording time intervals of at least 2 min60 s to the nearest 1 s.6.9 Small ToolsSquare-ended shovel and hand scoops, wrench, tamping rod, flashlight, and flashlight feeler gauges asrequired.7. Sampling7.1 Specimens of fresh c

46、oncrete shall be obtained in accordance with Practice C172.7.2 Concrete samples shall have a nominal maximum size of aggregate of 50 mm 2 in. or less. If the concrete hascontainsaggregate larger than 50 mm 2 in., samples shall be obtained by wet sieving over a 50-mm 2-in. 50 mm 2 in. sieve inaccorda

47、nce with Practice C172.7.3 Testing of concrete samples shall be completed within 45 min after the completion of mixing unless otherwise stipulated.FIG. 2 Surcharge With Spacers and Plastic Plate Centered in Steel MoldC1170/C1170M 1448. Preparation of Apparatus8.1 Vibrating TableVerify that the vibra

48、ting table meets the requirements of 6.1. Make adjustments if necessary.8.1.1 Determine the frequency and double amplitude of the vibrating table under simulated test conditions prior to initial useand annually thereafter (See Note 45).NOTE 5A vibrating reed tachometer shouldmay be used to check the

49、 vibration frequency.8.1.2 In addition to the calibration schedule given in 8.1.1, calibrate the vibrating table after any event (including repairs) thatmight affect its operation, or whenever test results are questionable causing vibrating table operation to be suspect.8.2 Surcharge AssemblyAdjust the surcharge assembly spacers, as necessary, to ensure the spacers do not bind and themaximum allowable distance between the spacers and