Materials selection for concrete overlays : the final report Page: X
xviii, 192 p. : col. ill. ; 28 cm.View a full description of this report.
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6.2.1 Compressive Strength (ASTM C39) and Modulus of Elasticity (ASTM C469)......... 95
6.2.2 Flexural Strength (A STM C78) ................................................................................... 96
6.2.3 Coefficient of Thermal Expansion and Modulus of Elasticity .................................... 96
6.2.4 Tensile Bond Strength................................................................................................. 96
6.2.5 Average Residual Strength (A STM C 1399)................................................................ 97
6.2.6 (A STM C157) .............................................................................................................. 97
6.2.7 W orkability (A STM C143) .......................................................................................... 98
6.3 Prescriptive Based Acceptance Criteria..............................................................................98
6.3.1 Cem ent Type ................................................................................................................ 98
6.3.2 Cem ent Content .......................................................................................................... 99
6.3.3 Fly A sh Replacem ent .................................................................................................. 99
6.3.4 W ater to Cem entitious Ratio..................................................................................... 100
6.3.5 Aggregates ................................................................................................................. 100
Coarse Aggregate............................................................................................................ 100
Fine Aggregate................................................................................................................ 101
6.3.6 Aggregate Ratios....................................................................................................... 101
6.3.7 Adm ixture Selection and Dosage.............................................................................. 101
6.3.8 Fibers.......................................................................................................................... 102
Fiber Type ....................................................................................................................... 102
Fiber Geom etry and Shape............................................................................................. 102
Fiber Dosage ................................................................................................................... 102
6.3.9 Reinforcem ent Bars .................................................................................................. 103
6.4 Flow chart ...........................................................................................................................103
6.4.2 M aterials Selection Flowchart .................................................................................. 105
Chapter 7. G uidelines for Construction Procedures ............................................................113
7.1 Introduction........................................................................................................................113
7.2 Surface Preparation...........................................................................................................113
7.2.1 Bonded Type Overlays ............................................................................................. 113
Surface Repair.................................................................................................................113
Bitum inous and Foreign M aterial Rem oval................................................................... 115
Surface Texturing............................................................................................................115
Surface Cleaning ............................................................................................................. 117
W etting the Surface before Placem ent...........................................................................118
7.2.2 Unbonded Type Overlays .........................................................................................11 9
Surface Repair.................................................................................................................119
Separation layer placem ent (for UBCO s)......................................................................119
Wetting the Surface before Placement...........................................................................121
7.3 Concrete Overlay Placem ent ............................................................................................121
7.3.1 Environm ental Considerations ......................................... .....................................121
7.3.2 Bonding A gent Application ..................................................................................... 122
7.3.3 Consistent Concrete Placem ent.................................... 123
7.3.4 Fiber Reinforcem ent A dditions....................................123
7.3.5 Dow el Placem ent ..................................................................................................... 123
7.4 Finishing and Curing ....................................................................................................... 123
7.4.1 Unw eighted Carpet Dragging .................................................................................. 123
7.4.2 Tining ....................................................................................................................... 124
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Kim, Dong H.; Fowler, David W.; Ferron, Raissa P.; Trevino, Manuel M. & Whitney, David P. Materials selection for concrete overlays : the final report, report, July 2012; Austin, Texas. (https://texashistory.unt.edu/ark:/67531/metapth303706/m1/12/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.