ASTM D5821-2013(2017) 2500 Standard Test Method for Determining the Percentage of Fractured Particles in Coarse Aggregate《测定粗集料中破裂颗粒百分比的标准试验方法》.pdf
《ASTM D5821-2013(2017) 2500 Standard Test Method for Determining the Percentage of Fractured Particles in Coarse Aggregate《测定粗集料中破裂颗粒百分比的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D5821-2013(2017) 2500 Standard Test Method for Determining the Percentage of Fractured Particles in Coarse Aggregate《测定粗集料中破裂颗粒百分比的标准试验方法》.pdf(6页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D5821 13 (Reapproved 2017)Standard Test Method forDetermining the Percentage of Fractured Particles in CoarseAggregate1This standard is issued under the fixed designation D5821; the number immediately following the designation indicates the year oforiginal adoption or, in the case of re
2、vision, the year 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 test method covers the determination of thepercentage, by mass or by count, of a coarse aggre
3、gate samplethat consists of fractured particles meeting specified require-ments.1.2 The values stated in SI units are to be regarded as thestandard. The values in parentheses are provided for informa-tion only.1.3 This standard does not purport to address all of thesafety concerns, if any, associate
4、d with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recogni
5、zed principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C136 Test Method for Si
6、eve Analysis of Fine and CoarseAggregatesC702 Practice for Reducing Samples ofAggregate to TestingSizeD8 Terminology Relating to Materials for Roads and Pave-mentsD75 Practice for Sampling AggregatesE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3. Terminology3.1 Definitions:3.1.1 f
7、ractured face, nan angular, rough, or broken sur-face of an aggregate particle created by crushing, by otherartificial means, or by nature (see Terminology D8).3.1.1.1 DiscussionFor this standard, a face will be con-sidered a “fractured face” only if it has a projected area at leastas large as one-q
8、uarter of the maximum projected area (maxi-mum cross-sectional area) of the particle (this excludes smallnicks, see Fig. 1) and the face has sharp or slightly blunt edges.3.1.2 fractured particle, na particle of aggregate having atleast the minimum number of fractured faces specified (usuallyone or
9、two).4. Significance and Use4.1 Some specifications contain requirements relating topercentage of fractured particles in coarse aggregates. Onepurpose of such requirements is to maximize shear strength byincreasing inter-particle friction in either bound or unboundaggregate mixtures. Another purpose
10、 is to provide stability forsurface treatment aggregates and to provide increased frictionand texture for aggregates used in pavement surface courses.This test method provides a standard procedure for determiningthe acceptability of coarse aggregate with respect to suchrequirements.4.2 Specification
11、s differ as to the number of fractured facesrequired on a fractured particle, and they also differ as towhether percentage by mass or percentage by particle countshall be used. If the specification does not specify, use thecriterion of at least one fractured face and calculate percentageby mass.5. A
12、pparatus5.1 BalanceA balance or scale accurate and readable towithin 0.1 % of the test sample mass at any point within therange of use.5.2 SievesSieves conforming to Specification E11.5.3 SplitterA sample splitter suitable for dividing fieldsamples into test portion sizes in accordance with Practice
13、C702.1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.51 onAggregate Tests.Current edition approved Oct. 1, 2017. Published October 2017. Originallyapproved in 1995. Last previous edition approved in 20
14、13 as D5821 13. DOI:10.1520/D5821-13R17.2For 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.Copyright ASTM Intern
15、ational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, G
16、uides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15.4 SpatulaA spatula or similar tool to aid in sortingaggregate particles.6. Sampling6.1 Sample the aggregate in accordance with Practice D75.7. Sample Preparation7.1 Dry the sample sufficie
17、ntly to obtain a clean separationof fine and coarse material in the sieving operation. Sieve thesample over the 4.75-mm (No. 4) sieve, or other specified sievefor retaining material for this test, in accordance with TestMethod C136 and then reduce the portion retained on the sieveusing a splitter in
18、 accordance with Practice C702 to appropriatesize for test.7.2 The mass of the test sample shall be at least largeenough so that the largest particle is not more than 1 % of thesample mass; or the test sample shall be at least as large asindicated below, whichever is smaller:Nominal Maximum SizeSqua
19、reOpenings, mm (in.)Minimum Test SampleMass, g(Approx. lb)9.5 (38) 200 (0.5)12.5 (12) 500 (1)19.0 (34) 1500 (3)25.0 (1) 3000 (6.5)37.5 (112) 7500 (16.5)50.0 (2) 15 000 (33)63.0 (212) 30 000 (66)75.0 (3) 60 000 (132)90.0 (312) 90 000 (198)7.3 For aggregate with a nominal maximum size of 19.0 mm(34 in
- 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。
本资源只提供5页预览,全部文档请下载后查看!喜欢就下载吧,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:
- ASTMD5821201320172500STANDARDTESTMETHODFORDETERMININGTHEPERCENTAGEOFFRACTUREDPARTICLESINCOARSEAGGREGATE

链接地址:http://www.mydoc123.com/p-520798.html