ACI-546.1R-1980-R1997.pdf
《ACI-546.1R-1980-R1997.pdf》由会员分享,可在线阅读,更多相关《ACI-546.1R-1980-R1997.pdf(20页珍藏版)》请在三一文库上搜索。
1、ACI 546.1 R-80 (Reapproved 1988) (Reapproved 1997) Guide for Repair of Concrete Bridge Superstructures Reported by ACI Committee 546 Repair techniques for concrete bridge superstructures are described. This includes pier caps, beams, decks, curbs, sidewalks, and rails. Special emphasis is placed on
2、decks. Recommendations for evaluation of damage, selec- tion of repair method, and surface preparation are given. Repair materials given primary consideration are con- ventional portland cement mortars and concretes, and those using latex, epoxy resins, or methyl methacrylate. Only techniques that h
3、ave been documented and used ex- tensively are included. Guide recommendations are those considered necessary for severe exposure conditions. Contents Chapter 1 - Introduction, page 546.1R- 2 1.1 - General 1.2 - Scope Chapter 2 -Evaluation of damage and selection of re- pair method, page 546.1R-2 2.
4、1 - General 2.2 - Delaminations 2.3 - Spalls 2.4 - Scaling 2.5 - Cracked or fractured sections of concrete members 2.6 - Rutting 2.7 - Repair material characteristics Chapter 3- Surface prepara- tion, page 546.1R-6 3.1 - Scope 3.2 - Removal of deteriorated concrete 3.3 - Reinforcing steel 3.4 - Clea
5、ning of area to be repaired 3.5 - Cracks ACI Committee reports, guides, standard practices, design hand- books, and commentaries are intended for guidance in planning, de- signing, executing, and inspecting construction. This document is intended for the use of individuals who are competent to evalu
6、- ate the significance and limitations of its content and recommen- dations and who will accept responsibility for the application of the material it contains. The American Concrete Institute disclaims any and all responsibility for the stated principles. The Institute shall not be liable for any lo
7、ss or damage arising therefrom. Reference to this document shall not be made in contract docu- ments. If items found in this document are desired by the Architect/ Engineer to be a part of the contract documents, they shall be restated in mandatory language for incorporation by the Architect/Enginee
8、r. 211.5R-1 Keywords: bridges (structures); concretes; concrete construction; epoxy resins; latex (plastic); plastics, polymers, and resins; re- pairs; shotcrete. Chapter 4- Portland cement concrete, page 546.1R-7 4.1 - General 4.2 - Materials and proportions 4.3 - Batching and mixing 4.4 - Full dep
9、th patches and formed re- pairs 4.5 - Partial depth patches 4.6 - Overlays 4.7 - Shotcrete 4.8 - Curing Chapter 5 -Latex modified portland cement mortar/con- crete, page 546.1R-11 5.1 - General 5.2 - Materials and proportions 5.3 - Batching and mixing 5.4 - Patches 5.5 - Overlays 5.6 - Curing Chapte
10、r 6 -Polymer con- crete, page 546.1R-13 6.1 - General 6.2 - Epoxy concrete 6.2.1- Materials and proportions 6.2.2 - Batching and mixing 6.2.3 - Patches and overlays 6.2.4 - Crack and fracture repair with epoxy resins 6.3 - Methyl methacrylate concrete 6.3.1 - Materials and proportions 6.3.2 - Batchi
11、ng and mixing 6.3.3 - Preplaced aggregate 6.3.4 - Premixing and placing 6.3.5 - Polymerization 6.3.6 - Cleaning of tools and equipment 6.3.7 - Storage and handling of materials 6.3.8 - Disposal of excess mon- omer Chapter 7 - References, page 546.1R-18 Chapter 8 -Applicable speci- fications and stan
12、dards, page 546.1R-20 Copyright 0 1997, 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 device printed, written, or oral, or recording for sound
13、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. Copyright American Concrete Institute Provided by IHS under license with ACI Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for R
14、esale, 03/05/2007 01:21:05 MSTNo reproduction or networking permitted without license from IHS -,-,- 546.1R-2 ACI COMMITTEE REPORT Fig. 1 -Chain drag (courtesy State of California Department of Transportation). CHAPTER 1 - Introduction 1.1 - General Although concrete bridges are generally durable st
15、ructures that provide good service over many years with minimum maintenance, damage requiring repair does occur, and it occurs most commonly in the deck. Chlorides from salts used to prevent ice or from sea spray contribute to, or are the source of, most deterioration. Damage may also be due to poor
16、 design or construction, vehicle impact, or excessive overloading. Recommendations for the design and construction of bridge decks can be found in the re- port by ACI Committee 345.1 This Guide is not intended to answer the question of whether a permanent or temporary repair should be made. Limited
17、funds may only allow the filling of pot holes with an asphaltic material even though this may accelerate deterioration. When the state of deterioration is too far advanced to reclaim the sur- face, a temporary riding surface such as an asphaltic concrete overlay may be expedient. This, too, may acce
18、lerate deterioration and it will conceal that dete- rioration so that safety evaluations become more dif- ficult. This Guide provides only information on rec- ommended techniques and materials for enduring repairs. Quite often it is necessary to keep bridges open to traffic while repairs are being m
19、ade. The main- tenance of safe traffic conditions can be the most troublesome and costly item in the repair program. The daytime hours between peak traffic loads in ur- ban areas may not provide sufficient time to make repairs with portland cement concrete. Special patch materials may be justified w
20、hen their cost is com- pared to the expense of prolonged detouring or con- trolling traffic through the repair zone. 1.2 - Scope This Guide is intended for concrete super- structures of bridges, including pier caps, beams, curbs, sidewalks, rails, and with special emphasis on decks. The procedures c
21、an be used on other parts of the bridge or on other concrete structures. Repair materials included are conventional port- land cement mortars and concretes, and those utiliz- ing latex, epoxy resins, or methyl methacrylate. Each of these materials has been used extensively in bridge repair, and thei
22、r performance is well docu- mented. Recommendations are those considered nec- essary for severe exposure conditions. Only proven, effective procedures are included. Procedures re- ported by Tuthill,2 Tremper,3 Kulberg,4 and Felt,5 on restoration of deteriorated concrete provide the ba- sic approach
23、for the methods presented. Other products not included have been subject to evaluation by State highway or transportation de- partments. A large number (over 300) of these eval- uations are listed in the Patching Materials section of SPEL, Special Product Evaluation List.30 Many of these materials o
24、ffer the advantage of being rapid-setting materials with an accelerated rate of strength gain compared to conventional port- land cement concrete mixes. Some of these materials may also have the property of very low shrinkage on setting and curing, or may expand slightly on set- ting and curing. Som
- 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 546.1 1980 R1997
链接地址:https://www.31doc.com/p-3729303.html