ConcreteCrackandPartial-DepthSpallRepairManualAmerican ConcretePavement AssociationAMERICANCONCRETEPAVEMENTASSOCIATION JP003P.qxd 4/21/04 11:30 AM Page 101UNIFIED FACILITIES CRITERIA (UFC)Operation & Maintenance:CONCRETE CRACK AND PARTIAL-DEPTH SPALL REPAIREdited and Annotated by theAmerican Concrete Pavement AssociationU.S. ARMY CORPS OF ENGINEERSNAVAL FACILITIES ENGINEERING COMMANDAIR FORCE CIVIL ENGINEER SUPPORT AGENCYAPPROVED FOR PUBLIC RELEASE:DISTRIBUTION UNLIMITEDUFC 3-270-03May 2004Any copyrighted material included in this UFC is identified at its point of use. Useof the copyrighted material apart from this UFC must have the permission of thecopyright holder. The format of this document does not conform to UFC 1-300-1.iReprint from JP003P.qxd 4/21/04 11:30 AM Page iFOREWORDThe Unified Facilities Criteria (UFC) system is prescribed by MIL-STD 3007 and provides planning, design, construction, operationsand maintenance criteria, and applies to all service commandshaving military construction responsibilities. UFC will be used for allservice projects and work for other customers where appropriate.UFC are living documents and will be periodically reviewed,updated, and made available to users as part of the Services’responsibility for providing technical criteria for military construction.Headquarters, United States Army Corps of Engineers (HQUSACE),Naval Facilities Engineering Command (NAVFAC), and Air ForceCivil Engineer Support Agency (AFCESA) are responsible foradministration of the UFC system.Technical content of UFC is theresponsibility of the preparing tri-service committee. Recommendedchanges with supporting rationale should be sent to the respectiveservice proponent office, as follows:• HQUSACE, ATTN: CECW-E, 441 G Street, NW, Washington,DC 20314-1000, or the Recommended Changes toEngineering Documents page on the TECHINFO site listedbelow.• HQUSACE, ATTN: CECW-E, 441 G Street, NW, Washington,DC 20314-1000, or the Recommended Changes to Engi-neering Documents page on the TECHINFO site listed below.• Commander, Atlantic Division, Naval Facilities EngineeringCommand, 1510 Gilbert Street (ATTN: NAVFAC Criteria Office),Norfolk, VA 23511-2699, or [email protected], by commercial telephone (757) 322-4200, or DSN262-4200, or by facsimile machine to (757) 322-4416.• Air Force Civil Engineer Support Agency, 139 Barnes Drive,Tyndall Air Force Base, FL 32403-5319, or [email protected] are effective upon issuance. UFC are distributed only inelectronic media from the following sources:• USACE TECHINFO Internet site http://www.hnd.usace.army.mil/techinfo/index.htm.•NAVFAC Criteria Office Internet site http://criteria.navfac.navy.mil/criteria.• Construction Criteria Base (CCB) system maintained by theNational Institute of Building Sciences on CD-ROM and atInternet site http://www.ccb.org/.Hard copies of UFC printed from electronic media should bechecked against the current electronic version prior to use to ensurethat they are current.FOREWORD BY ACPAThis publication is annotated by the American Concrete PavementAssociation. It is a reprint of a United Facilities Criteria document,UFC 3-270-04, and is an ACPA publication, JP002P. The ACPAwishes to thank the Tri-Services of the Department of Defense forallowing ACPA to annotate and reprint this document.ii JP003P.qxd 4/21/04 11:30 AM Page iiCONTENTS Chapter 1 – Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1. Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2. Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.3. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Table 1.1. American Society for Testing and Materials (ASTM). . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Table 1.2. American Concrete Institute (ACI). . . . . . . . . . . . . . . 5Table 1.3. American Concrete Pavement Association (ACPA) . . . . . . . . . . . . . . . . . . . . . . . . . . 5Chapter 2 – Purpose of Crack and Partial-Depth Spall Repair . . . 72.1. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.2. Objective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.3. Airfield Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.4. Cracks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.5. Spalls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.6. Moderate-Severity Spalling. . . . . . . . . . . . . . . . . . . . . . . . . 9Chapter 3 – Crack Sealing and Repair. . . . . . . . . . . . . . . . . . . . . 113.1. Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.2. Test Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.3. Sealant Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.4. Shape Factor and Recess . . . . . . . . . . . . . . . . . . . . . . . . 123.5. Sandblasting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123.6. Removing Loose Material . . . . . . . . . . . . . . . . . . . . . . . . . 123.7. Vacuuming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123.8. Cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123.9. Backer …