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This collection contains technical reports and publications of the Infrastructure Research Institute.

Recent Submissions

  • Development of a Precision Statement for ASTM A1061 

    Lequesne, Rémy D.; Collins, William N.; Lucon, Enrico; Poudel, Ashwin; Darwin, David (University of Kansas Center for Research, Inc., 2019-05)
    An interlaboratory study involving 19 laboratories was conducted to quantify the precision of ASTM A1061-16, Standard Test Methods for Testing Multi-wire Steel Prestressing Strand. This standard includes methods for measuring ...
  • Synthesis of Rating Methodologies for Concrete Bridges without Plans 

    Lequesne, Rémy D.; Collins, William N. (University of Kansas Center for Research, Inc., 2019-05)
    In response to Federal Highway Administration requirements, many states are confronted with assigning load ratings to large numbers of concrete bridges that do not have plans. The AASHTO Manual for Bridge Evaluation does ...
  • Conventional and High-Strength Headed Bars—Part 2: Data Analysis 

    Ghimire, Krishna P.; Shao, Yun; Darwin, David; O'Reilly, Matthew (American Concrete Institute, 2019-05)
    Equations to characterize the anchorage strength of headed bars were developed, incorporating key factors affecting anchorage strength: concrete compressive strength; embedment length; bar diameter; spacing between the ...
  • Conventional and High-Strength Headed Bars—Part 1: Anchorage Tests 

    Ghimire, Krishna P.; Shao, Yun; Darwin, David; O'Reilly, Matthew (American Concrete Institute, 2019-05)
    Results of an experimental program on the anchorage strength of headed reinforcing bars are presented. Two hundred and two exterior beam-column joint specimens with concrete compressive strengths ranging from 3960 to 16,030 ...
  • RC Coupling Beams with High-Strength Steel Bars: Summary of Test Results 

    Weber-Kamin, Alexander S.; Lequesne, Rémy D.; Lepage, Andrés (University of Kansas Center for Research, Inc., 2019-01)
    The use of high-strength steel bars in reinforced concrete coupling beams is expected to reduce reinforcement congestion. A series of tests was conducted to investigate the effects of high-strength reinforcement on coupling ...
  • Controlling Cracks in Bridge Decks 

    Khajehdehi, Rouzbeh; Darwin, David (University of Kansas Center for Research, Inc., 2018-12)
    Laboratory studies incorporating crack-reducing technologies with those included in specifications for low-cracking high-performance concrete (LC-HPC) bridge decks and analyses of data from crack surveys and construction ...
  • Use of Innovative Concrete Mixes for Improved Constructability and Sustainability of Bridge Decks, 2010-2013 

    Shrestha, Pankaj Narayan; Harley, Amber; Pendergrass, Benjamin; Darwin, David; Browning, JoAnn (University of Kansas Center for Research, Inc., 2013-05)
    Bridge deck crack surveys were performed on twelve bridges on US-59 south of Lawrence, KS to determine the effects of mixture proportions, concrete properties, deck type, and girder type on the crack density of reinforced ...
  • Corrosion Performance of Plain and Epoxy-Coated MMFX Bars 

    Farshadfar, Omid; O’Reilly, Matthew; Darwin, David (University of Kansas Center for Research, Inc., 2018-10)
    The corrosion resistance of ASTM A1035 Type CL (2% Cr), CM (4% Cr), and CS (9% Cr) steel bars produced by MMFX Technologies were evaluated in both cracked and uncracked concrete as well as in the rapid macrocell test. ...
  • Diagonally Reinforced Concrete Coupling Beams: Effects of Axial Restraint 

    Poudel, Ashwin; Lequesne, Rémy D.; Lepage, Andrés (University of Kansas Center for Research, Inc., 2018-09-01)
    Diagonally reinforced concrete coupling beams are commonly used in mid- and high-rise buildings to connect adjacent structural walls separated by openings. Under lateral loading, these beams can undergo large inelastic ...
  • High-Strength Steel Bars in Earthquake-Resistant T-Shaped Concrete Walls 

    Huq, Mohammad Sajedul; Weber-Kamin, Alexander S.; Ameen, Shahedreen; Lequesne, Rémy D.; Lepage, Andrés (University of Kansas Center for Research, Inc., 2018-09-01)
    The object of this study was to determine experimentally the influence of selected reinforcing steel mechanical properties on wall deformation capacity. Four large-scale T-shaped reinforced concrete wall specimens with ...
  • Anchorage Strength of Closely Spaced Hooked Bars 

    Ajaam, Ali Hussein; Yasso, Samir; Darwin, David; O’Reilly, Matthew; Sperry, Jayne (American Concrete Institute, 2018-07)
    The effect of close spacing on the anchorage strength of standard hooks is investigated. Sixty-seven simulated beam-column joint specimens were tested, each containing three, four, or six No. 5, 8, or 11 (No. 16, 25, or ...
  • Mortar Constituent of Concrete in Compression 

    Maher, Ataullah; Darwin, David (American Concrete Institute, 1982-03-01)
    A study of the behavior of the mortar constituent of concrete under monotonic and cyclic uniaxial compression is summarized. Two mixes were used, with proportions corresponding to concretes with water-cement ratios of 0.5 ...
  • Internal Curing and Supplementary Cementitious Materials in Bridge Decks 

    Lafikes, James; Khajehdehi, Rouzbeh; Feng, Muzai; O’Reilly, Matthew; Darwin, David (University of Kansas Center for Research, Inc., 2018-04)
    Supplementary cementitious materials (SCMs) are used in conjunction with pre-wetted fine lightweight aggregate to provide internal curing, producing high-performance, low-shrinking concrete to mitigate bridge deck cracking. ...
  • COMBINED EFFECTS OF INTERNAL CURING, SLAG, AND SILICA FUME ON DRYING SHRINKAGE OF CONCRETE 

    Pendergrass, Benjamin; Darwin, David; Khajehdehi, Rouzbeh; Feng, Muzai (University of Kansas Center for Research, Inc., 2017-08-01)
    This study evaluated drying shrinkage of concrete mixtures containing different replacement levels of total aggregate with pre-wetted lightweight aggregate (0, 8, and 10% by volume), replacements of cement with Grade 100 ...
  • Conventional and High-Strength Hooked Bars: Detailing Effects 

    Sperry, Jayne; Darwin, David; O’Reilly, Matthew; Lepage, Andrés; Lequesne, Rémy D.; Matamoros, Adolfo B.; Feldman, Lisa; Yasso, Samir; Searle, Nathaniel; DeRubeis, Michael; Ajaam, Ali Hussein (American Concrete Institute, 2018-01-01)
    Findings from a study on the effect of hook bend angle, concrete clear cover, and orientation of confining reinforcement on hook anchorage strength are presented. The range of test parameters was much broader than in ...
  • Compatibility of Shrinkage-Reducing and Air-Entraining Admixtures 

    Pendergrass, Benjamin; Darwin, David; Feng, Muzai; Khajehdehi, Rouzbeh (American Concrete Institute, 2017-09-01)
    The compatibility of two shrinkage-reducing admixtures (SRAs) with two air-entraining admixtures (AEAs)—one surfactant-based and one foaming polymer-based—was examined based on freezing and thawing durability, scaling ...
  • Anchorage of Headed Reinforcing Bars in Concrete 

    Ghimire, Krishna P.; Darwin, David; O’Reilly, Matthew (University of Kansas Center for Research, Inc., 2018-01)
    Headed reinforcing bars serve as a viable alternative to hooked bars for anchorage in concrete because they provide a more efficient anchorage mechanism and limit congestion of the reinforcement. This study is part of a ...
  • Use of Headed Bars as Shear Reinforcement 

    Lequesne, Rémy D.; O’Reilly, Matthew; Darwin, David; Lepage, Andrés; Al-Sabawy, Abdalkader; Guillen, Eduardo; Spradling, Donald (University of Kansas Center for Research, Inc., 2018-01)
    Thirty-nine beams with a shear span-to-depth ratio of 3 were tested with the goal of determining whether headed deformed bars can be used in reinforced concrete members in place of stirrups as shear reinforcement as well ...
  • Assessment of Moisture-Tolerant Coatings for Decreasing Open Top Construction Time 

    Keith, Christine; Dehghani Najvani, Mohammad Amin; O’Reilly, Matthew; Medina, Mario; Darwin, David; Abdul Baki, Ali Natheer; Nazzal, Luay Ali; Lee, Kyoung Ok (University of Kansas Center for Research, Inc., 2017-04)
    Open top construction is a practice commonly used in the construction of large structures, such as nuclear power plants, as it allows large equipment to be easily placed by lowering it into position from above. Doing so, ...
  • Variation of Concrete Strength, Permeability, and Porosity due to Specimen Type, Season, and Age 

    O’Reilly, Matthew; Darwin, David; Sperry, Jayne; Browning, JoAnn (University of Kansas Center for Research, Inc., 2017-01)
    Time and curing conditions may impact the strength and permeability of concrete. The strength and permeability of concrete with and without supplementary cementitious materials (SCMs) were evaluated as a function of specimen ...

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