Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/36875
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dc.contributor.authorCarruth, William D.-
dc.date.accessioned2020-06-03T13:34:48Z-
dc.date.available2020-06-03T13:34:48Z-
dc.date.issued2020-05-
dc.identifier.govdocERDC/GSL TR-20-17-
dc.identifier.urihttps://hdl.handle.net/11681/36875-
dc.identifier.urihttp://dx.doi.org/10.21079/11681/36875-
dc.descriptionTechnical Report-
dc.description.abstractThe Air Force Civil Engineer Center (AFCEC) Rapid Airfield Damage Recovery (RADR) program currently utilizes rapid-setting flowable fill (RSFF) and rapid-setting concrete (RSC) for backfilling and capping crater repairs. These materials have been proven successful through many full-scale tests, troop demonstrations, and live flight trafficking. However, only one proprietary product is currently approved for each material. Two candidate capping materials and one backfill material were evaluated by conducting simulated crater repairs and collecting appropriate data. For capping products, both small (8.5 ft x 8.5 ft) and large (15 ft x 15 ft) repairs were conducted and trafficked with simulated F-15E aircraft traffic. For the backfill material, three small repairs were backfilled and the California Bearing Ratio (CBR) was estimated at cure times of 0.5, 2, and 24 hr. Overall, repairs capped with Western Materials Fastrac 246 failed after only 2,000 passes, so the material is not currently recommended for approval. Repairs capped with Buzzi Unicem Ulti-Pave3® were able to sustain 3,500 passes before trafficking was ceased, so this material is recommended for approval as a crater repair capping material. CTS rapid-setting flowable fill backfill exhibited lower than expected CBR values and did not allow timely percolation of mix water, so it is not currently recommended for approval at this time.en_US
dc.description.sponsorshipRapid Airfield Damage Recovery Program (U.S.)en_US
dc.description.sponsorshipAir Force Civil Engineer Center (U.S.)-
dc.description.tableofcontentsAbstract .................................................................................................................................... ii Figures and Tables ................................................................................................................... v Preface .................................................................................................................................... ix 1 Introduction ...................................................................................................................... 1 1.1 Background ........................................................................................................ 1 1.2 Objectives ........................................................................................................... 2 1.3 Scope .................................................................................................................. 2 1.4 Outline of chapters ............................................................................................ 3 2 Test Site, Equipment, and Materials Description......................................................... 4 2.1 Test site description .......................................................................................... 4 2.2 Equipment .......................................................................................................... 4 2.2.1 Compact track loader and wheel saw attachment ................................................... 4 2.2.2 Compact excavator ..................................................................................................... 6 2.2.3 Rammer-style compactor ........................................................................................... 7 2.2.4 Extendable-boom forklift............................................................................................. 9 2.2.5 Simplified volumetric mixer ........................................................................................ 9 2.3 Materials .......................................................................................................... 10 2.3.1 Natural subgrade and crushed stone backfill material .......................................... 10 2.3.2 Rapid-setting flowable fill ......................................................................................... 11 2.3.3 Rapid-setting concrete .............................................................................................. 12 3 Test Procedures and Data Collection .......................................................................... 14 3.1 Repair process ................................................................................................. 14 3.1.1 Marking, saw cutting, breaking, and excavation processes ................................... 14 3.1.2 Backfill process ......................................................................................................... 14 3.1.3 Capping process ........................................................................................................ 17 3.2 Data collection .................................................................................................19 3.2.1 Rod and level survey ................................................................................................. 19 3.2.2 Material strength property testing ........................................................................... 21 3.2.3 Repair distress photographs and documentation .................................................. 21 3.3 Trafficking ......................................................................................................... 21 3.4 Failure definition ............................................................................................. 22 4 Results and Discussion ................................................................................................. 23 4.1 Rapid-setting concrete results and discussion ............................................. 23 4.1.1 Subgrade and backfill California bearing ratio (CBR) results ................................. 23 4.1.2 Backfill and cap thickness results ........................................................................... 24 4.1.3 Tri-service spall repair certification protocol results ............................................... 24 4.1.4 Compressive strength sample results ..................................................................... 25 4.1.5 Visual observations under traffic ............................................................................. 26 4.1.6 Survey data................................................................................................................ 36 4.2 Rapid-setting flowable fill results and discussion ........................................ 40 4.2.1 Previous wet method testing .................................................................................... 40 4.2.2 Current dry method testing....................................................................................... 41 5 Conclusions and Recommendations ........................................................................... 44 5.1 Conclusions ..................................................................................................... 44 5.2 Recommendations ......................................................................................... 45 References ............................................................................................................................. 46 Appendix A: Repair Material Certification Results ........................................................... 48 Appendix B: Dynamic Cone Penetrometer (DCP) Data .................................................... 51 Unit Conversion Factors .................................................................................................... 106 Acronyms ............................................................................................................................ 107 Report Documentation Page-
dc.format.extent120 pages / 15.7 MB-
dc.format.mediumPDF-
dc.language.isoen_USen_US
dc.publisherGeotechnical and Structures Laboratory (U.S.)en_US
dc.publisherEngineer Research and Development Center (U.S.)-
dc.relation.ispartofseriesTechnical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/GSL TR-20-17-
dc.rightsApproved for Public Release; Distribution is Unlimited-
dc.sourceThis Digital Resource was created in Microsoft Word and Adobe Acrobat-
dc.subjectRunways (Aeronautics)--Maintenance and repairen_US
dc.subjectMilitary basesen_US
dc.subjectAir basesen_US
dc.subjectCrateringen_US
dc.subjectFills (Earthwork)en_US
dc.subjectCement compositesen_US
dc.titleFull-scale testing of commercially available cementitious backfill and surface capping materials for crater repairsen_US
dc.typeReporten_US
Appears in Collections:Technical Report

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