ASTM C944 C944M-1999(2005)e1 Standard Test Method for Abrasion Resistance of Concrete or Mortar Surfaces by the Rotating-Cutter Method《用旋转切割机法对混凝土或砂浆表面耐磨性的标准试验方法》.pdf
《ASTM C944 C944M-1999(2005)e1 Standard Test Method for Abrasion Resistance of Concrete or Mortar Surfaces by the Rotating-Cutter Method《用旋转切割机法对混凝土或砂浆表面耐磨性的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM C944 C944M-1999(2005)e1 Standard Test Method for Abrasion Resistance of Concrete or Mortar Surfaces by the Rotating-Cutter Method《用旋转切割机法对混凝土或砂浆表面耐磨性的标准试验方法》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C 944/C 944M 99 (Reapproved 2005)e1Standard Test Method forAbrasion Resistance of Concrete or Mortar Surfaces by theRotating-Cutter Method1This standard is issued under the fixed designation C 944/C 944M; the number immediately following the designation indicates the yearof original ado
2、ption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTEThe designation was changed editorially to agree with the existing values st
3、atement in the Scope in March 2008.1. Scope1.1 This test method covers a procedure for determining theresistance of either concrete or mortar to abrasion. This testmethod is similar to Procedure B of Test Method C 779/C 779M.1.2 The values stated in SI units or inchpound units are tobe regarded sepa
4、rately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each systemshall be used independently of the other. Combining valuesfrom the two systems may result in nonconformance with thestandard.1.3 This standard does not purport to address all of thesafety concerns
5、, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C42 Test Method for Obtaining and Testing D
6、rilled Coresand Sawed Beams of ConcreteC 418 Test Method for Abrasion Resistance of Concrete bySandblastingC 779/C 779M Test Method for Abrasion Resistance ofHorizontal Concrete Surfaces3. Significance and Use3.1 This test method gives an indication of the relative wearresistance of mortar and concr
7、ete based on testing of cored orfabricated specimens. This test method has been successfullyused in the quality control of highway and bridge concretesubject to traffic. Primarily intended for use on the top ends of152-mm 6-in. diameter concrete cores, mortar specimens, orother samples of concrete o
8、f insufficient test area to permit theconduct of tests by Test Method C 418 or C 779/C 779M, thistest method is also applicable on concrete surfaces in place bymeasuring the abrasion loss as described in Section 9, Proce-dure B, of Test Method C 779/C 779M.4. Apparatus4.1 Abrasion DeviceA drill pres
9、s or similar device with achuck capable of holding and rotating the abrading cutter at aspeed of 200 r/min and exerting a force of either a normal loadof 98 6 1 N 22 6 0.2 lbf or a double load of 197 6 2 N 446 0.4 lbf on the test specimen surface. Fig. 1 shows acommercial drill press and Fig. 2 illu
10、strates details of therotating cutter. The difficulty in maintaining a constant load onthe abrading cutter when using the lever, gear, and springsystem of a drill press has been eliminated by placing thedesired load directly upon the spindle that turns the cutter. Themachine consists essentially of
11、a frame that supports the drivemotor, stepped pulley, and spindle. A clamping device to holdthe specimen is built into the base.4.2 Rotating CutterA rotating cutter similar to that shownin Fig. 2 and Fig. 3 shall be used in which 22 37.5 mm 1.5 in.diameter dressing wheels and 24 25.4 to 31.75 mm 1 t
12、o 1.25in. diameter washers are mounted. The washers as receivedshall be stacked and locked on a bolt for the purpose ofreducing their diameter to the specified range to avoid restrict-ing abrasion of the concrete by the washers. Cutter assembly,including washers, shall be locked onto horizontal rods
13、 suchthat individual dressing wheels are free to turn independently.The overall diameter of the cutter or the diameter of thecircular area abraded is 82.5 mm 314 in. Care shall be takento achieve constant contact between the rotating cutter and theentire test surface of the sample. This can be bette
14、r accom-plished if the cutters have a swivel connection allowing somevertical movement. If the dressing wheels have one roundededge, they shall be mounted with the rounded edge toward thevertical shaft. The individual grinding wheel dressers on thehorizontal shaft of the cutter shall be repositioned
15、 whenever a1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.62 on Abrasion Testing.Current edition approved May 1, 2005. Published June 2005. Originallyapproved in 1980. Last previous edition appr
16、oved in 1990 as C 944 90a.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.1Copyright ASTM International, 100
17、Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.change in the diameter of the outer cutters becomes apparent.This is accomplished by reversing each set of dressing wheelsto bring the smaller diameter cutters toward the vertical shaft.4.2.1 In making a test, the rotati
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMC944C944M19992005E1STANDARDTESTMETHODFORABRASIONRESISTANCEOFCONCRETEORMORTARSURFACESBYTHEROTATINGCUTTERMETHOD

链接地址:http://www.mydoc123.com/p-508926.html