ACI-211.3R-2002.pdf
《ACI-211.3R-2002.pdf》由会员分享,可在线阅读,更多相关《ACI-211.3R-2002.pdf(26页珍藏版)》请在三一文库上搜索。
1、ACI 211.3R-02 supersedes ACI 211.3R-97 and became effective January 11, 2002. Copyright 2002, American Concrete Institute. All rights reserved including rights of reproduction and use in any form or by any means, including the making of copies by any photo process, or by electronic or mechanical dev
2、ice, printed, written, or oral, or recording for sound or visual reproduc- tion or for use in any knowledge or retrieval system or device, unless permission in writing is obtained from the copyright proprietors. ACI Committee Reports, Guides, Standard Practices, and Commentaries are intended for gui
3、dance in planning, designing, executing, and inspecting construction. This document is intended for the use of individuals who are competent to evaluate the significance and limitations of its content and recommendations and who will accept re- sponsibility for the application of the material it con
4、tains. The American Concrete Institute disclaims any and all re- sponsibility for the stated principles. The Institute shall not be liable for any loss or damage arising therefrom. Reference to this document shall not be made in con- tract documents. If items found in this document are de- sired by
5、the Architect/Engineer to be a part of the contract documents, they shall be restated in mandatory language for incorporation by the Architect/Engineer. 211.3R-1 Guide for Selecting Proportions for No-Slump Concrete ACI 211.3R-02 This guide is intended as a supplement to ACI 211.1. A procedure is pr
6、esented for proportioning concrete that has slumps in the range of zero to 25 mm (1 in.) and consistencies below this range, for aggregates up to 75 mm (3 in.) maximum size. Suitable equipment for measuring such consistencies is described. Tables and charts similar to those in ACI 211.1 are provided
7、 which, along with laboratory tests on physical properties of fine and coarse aggregate, yield information for obtaining concrete proportions for a trial mixture. This document also includes appendices on proportioning mixtures for roller-compacted concrete, concrete roof tile, concrete masonry unit
8、s, and pervious concrete for drainage purposes. Examples are provided as an aid in calculating proportions for these specialty applications. Keywords: durability; mixture proportioning; no-slump concrete; roller- compacted concrete; slump test; water-cementitious materials ratio. CONTENTS Chapter 1S
9、cope and limits, p. 211.3R-2 Chapter 2Preliminary considerations, p. 211.3R-2 2.1General 2.2Methods for measuring consistency 2.3Mixing water requirement Chapter 3Selecting proportions, p. 211.3R-3 3.1General 3.2Slump and maximum-size aggregate 3.3Estimating water and aggregate grading requirements
10、3.4Selecting water-cementitious materials ratio 3.5Estimate of coarse aggregate quantity Reported by ACI Committee 211 Terrence E. Arnold*Michael R. GardnerDipak T. Parekh William L. BarringerJohn T. GuthrieJames S. Pierce* Muhammed P. BasheerG. Terry Harris, Sr.Michael F. Pistilli Casimir BognackiG
11、odfrey A. HolmstromSteven A. Ragan* Gary L. BrennoRichard D. HillRoyce J. Rhoads Marshall L. BrownDavid L. HollingsworthJohn P. Ries Ramon L. CarrasquilloGeorge W. HollonG. Michael Robinson James E. CookSaid IravaniDonald L. Schlegel* John F. CookTarif M. JaberJames M. Shilstone Raymond A. CookRober
12、t S. JenkinsAva Shypula David A. CrockerFrank A. KozeliskiJeffrey F. Speck D. Gene DanielColin L. LoboWilliam X. Sypher Francois de LarrardMark D. LutherStanley J. Virgalitte Donald E. DixonHoward P. LuxWoodward L. Vogt Calvin L. DodlGart R. Mass*Dean J. White, II Darrell F. ElliotEd T. McGuireRicha
13、rd M. Wing Michael J. Boyle Chair *Members of subcommittee who prepared revisions. Chair of subcommittee C. The subcommittee thanks Gary Knight and Tom Holm for providing assistance for some of the graphics in this report. -,-,- 211.3R-2ACI COMMITTEE REPORT Chapter 4Proportioning computations (SI un
14、its), p. 211.3R-7 4.1General proportioning criteria 4.2Example of proportioning computations 4.3Batching quantities for production-size batching 4.4Adjustment of trial mixture Chapter 5References, p. 211.3R-9 5.1Referenced standards and reports 5.2Cited references Appendix 1Proportioning computation
15、s (inch- pound units), p. 211.3R-10 Appendix 2Laboratory tests, p. 211.3R-11 Appendix 3Roller-compacted concrete mixture proportioning, p. 211.3R-13 Appendix 4Concrete roof tile mixture proportioning, p. 211.3R-20 Appendix 5Concrete masonry unit mixture proportioning, p. 211.3R-21 Appendix 6Pervious
16、 concrete mixture proportioning, p. 211.3R-24 CHAPTER 1SCOPE AND LIMITS ACI 211.1 provides methods for proportioning concrete with slumps greater than 25 mm (1 in.) as measured by ASTM C 143/C 143M. This guide is an extension of ACI 211.1 and addresses the proportioning of concrete having slump in t
17、he range of zero to 25 mm (1 in.). The paired values stated in inch-pound and SI units are the results of conversions that reflect the intended degree of accuracy. Each system is used independently of the other in the examples. Combining values from the two systems may result in nonconformance with
18、this guide. In addition to the general discussion on proportioning no-slump concrete, this guide includes proportioning proce- dures for these classes of no-slump concrete: roller-compacted concrete (Appendix 3); roof tiles (Appendix 4); concrete masonry units (CMU) (Appendix 5); and pervious concre
19、te (Appendix 6). CHAPTER 2PRELIMINARY CONSIDERATIONS 2.1General The general comments contained in ACI 211.1 are perti- nent to the procedures discussed in this guide. The descrip- tion of the constituent materials of concrete, the differences in proportioning the ingredients, and the need for knowle
20、dge of the physical properties of the aggregate and cementitious materials apply equally to this guide. The level of overdesign indicated in ACI 301 and ACI 318/318R should be applied to the compressive strength used for proportioning. 2.2Methods for measuring consistency Workability is the property
21、 of concrete that determines the ease with which it can be mixed, placed, consolidated, and finished. No single test is available that will measure this property in quantitative terms. It is usually expedient to use some type of consistency measurement as an index to work- ability. Consistency may b
22、e defined as the relative ability of freshly mixed concrete to flow. The slump test is the most familiar test method for consistency and is the basis for the measurement of consistency under ACI 211.1. No-slump concrete will have poor workability if consoli- dated by hand-rodding. If vibration is us
23、ed, however, such concrete might be considered to have adequate workability. The range of workable mixtures can therefore be widened by consolidation techniques that impart greater energy into the mass to be consolidated. The Vebe apparatus,1,2 the compacting factor apparatus,3 the modified compacti
24、on test, and the Thaulow drop table4 are laboratory devices that can provide a useful measure of consistency for concrete mixtures with less than 25 mm (1 in.) slump. Of the three consistency measurements, the Vebe apparatus is frequently used today in roller-compacted concrete and will be referred
- 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:
- ACI 211.3 2002
链接地址:https://www.31doc.com/p-3729033.html