Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/35675
Full metadata record
DC FieldValueLanguage
dc.contributor.authorMoser, Robert D.-
dc.contributor.authorJohnson, Tyler R.-
dc.contributor.authorMadden, Mary C.-
dc.contributor.authorWeiss, Charles A.-
dc.contributor.authorLong, Wendy R.-
dc.contributor.authorMcKechnie, Mason A.-
dc.contributor.authorSmith, David L.-
dc.date.accessioned2020-02-25T15:34:52Z-
dc.date.available2020-02-25T15:34:52Z-
dc.date.issued2020-02-
dc.identifier.govdocERDC TR-20-2-
dc.identifier.urihttps://hdl.handle.net/11681/35675-
dc.identifier.urihttp://dx.doi.org/10.21079/11681/35675-
dc.descriptionTechnical Report-
dc.description.abstractThis study focused on examining the susceptibility of three concrete materials to carbonation-induced deterioration in a simulated CO₂ chemical fish barrier system. The concrete materials tested were modeled after concretes and aggregate mineralogies used in civil works structures. The exposure conditions consisted of 74 mg/L and 225 mg/L concentrations of CO₂ in an aqueous solution maintained at both 21°C and 40°C. Visual examination and pH indicator solutions were used to monitor the progression of any deterioration in specimens during the experiment. Surface deterioration was not observed until 90- and 180-day measurements. Characterization performed on affected materials and surface deterioration products indicated that the damage was induced by carbonation mechanisms with Ca²+ leaching from the concrete microstructure reacting with CO₂ in solution. These processes were limited to the top 1 mm of the concrete, even at 180 days with any severe microstructural alteration and changes in pH limited to 100-200 μm of depth. The primary conclusion from this Phase 1 study is that carbonation-induced deterioration can occur in the simulated fish barrier environment, but the rates of carbonation are not of concern and are similar to those that would be expected for concrete exposed to normal atmospheric conditions and CO₂ concentrations.en_US
dc.description.sponsorshipUnited States. Army. Corps of Engineers. Buffalo District.en_US
dc.description.tableofcontentsContents Abstract ................................ ................................ ................................ ................................ .... ii Figures and Tables ................................ ................................ ................................ .................. iv Preface ................................ ................................ ................................ ................................ ..... vi Introduction ................................ ................................ ................................ ...................... 1 Research Scope ................................ ................................ ................................ ............... 3 Materials and Methods ................................ ................................ ................................ ... 4 3.1 Materials ................................ ................................ ................................ ............ 4 3.2 Simulated fish barrier exposure setup and operation ................................ .... 4 3.3 Analysis methods ................................ ................................ ............................. 10 3.3.1 Visual observations ................................................................................................... 10 3.3.2 Compressive strength of concrete cylinders ........................................................... 11 3.3.3 Phenolphthalein indicator analysis (visual carbonation) ........................................ 12 3.3.4 Thermogravimetric analysis (TGA) ........................................................................... 12 3.3.5 Optical microscopy .................................................................................................... 12 3.3.6 Scanning electron microscopy (SEM) ...................................................................... 12 3.3.7 Mineralogical analysis .............................................................................................. 13 Specimen Monitoring Using pH Indicator Solution and Visual Observations ........ 14 Characterization of Carbonation Carbonation-Induced Surface Deterioration ............................ 32 5.1 Thermogravimetric analysis (TGA) ................................ ................................ . 32 5.2 Optical microscopy ................................ ................................ ......................... 35 5.3 Scanning electron microscopy (SEM) ................................ ............................. 37 5.4 Mineralogical analysis ................................ ................................ ..................... 47 Conclusions ................................ ................................ ................................ .................... 49 Appendix A: Carbonation (CO CO2), pH, Temperature Readings, and mass change .......... 51 Appendix B: Concrete Mixture Proportioning Worksheets ................................ ............. 60 Report Documentation Page-
dc.format.extent71 pages / 9.468 Mb-
dc.format.mediumPDF/A-
dc.language.isoen_USen_US
dc.publisherGeotechnical and Structures Laboratory (U.S.)en_US
dc.publisherEnvironmental Laboratory (U.S.)-
dc.publisherEngineer Research and Development Center (U.S.)-
dc.relation.ispartofseriesTechnical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC TR-20-2-
dc.rightsApproved for Public Release; Distribution is Unlimited-
dc.sourceThis Digital Resource was created in Microsoft Word and Adobe Acrobat-
dc.subjectConcreteen_US
dc.subjectCarbonationen_US
dc.subjectHydrogen-ion concentrationen_US
dc.subjectCarbon dioxideen_US
dc.subjectFish barrieren_US
dc.subjectConcrete--Corrosionen_US
dc.subjectConcrete--Deteriorationen_US
dc.subjectConcrete hydraulic structuresen_US
dc.titleCarbonation processes in submerged concrete in a simulated CO₂ invasive fish barrier systemen_US
dc.typeReporten_US
Appears in Collections:Documents

Files in This Item:
File Description SizeFormat 
ERDC TR-20-2.pdf9.7 MBAdobe PDFThumbnail
View/Open