Browsing Civil Engineering by Title

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Browsing Civil Engineering by Title

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  • Calibration of a crop model to irrigated water use using a genetic algorithm
    Bulatewicz, Tom; Jin, W.; Staggenborg, S.; Lauwo, S.; Miller, M.; Das, S.; Andresen, D.; Peterson, Jeffrey M.; Steward, D. R.; Welch, S. M. (2009)
    Near-term consumption of groundwater for irrigated agriculture in the High Plains Aquifer supports a dynamic bio-socio-economic system, all parts of which will be impacted by a future transition to sustainable usage that ...
  • Early age strength enhancement of blended cement systems by CaCl2 and diethanol-isopropanolamine
    Riding, Kyle; Silva, Denise A.; Scrivener, Karen (2010)
    The enhancement of the 1 day strength of cementitious systems by a combination of calcium chloride (CaCl2) and diethanol-isopropanolamine (DEIPA) was studied, particularly in blended cement systems. A combination of ...
  • Effects of Construction Time and Coarse Aggregate on Bridge Deck Cracking
    Riding, Kyle A.; Poole, Jonathan L.; Schindler, Anton K.; Juenger, Maria C. G.; Folliard, Kevin J. (2009)
    Bridge deck temperature changes in the first few days after placement due to the concrete heat of hydration and changes in ambient conditions have long been identified as a significant contributor to early-age cracking. ...
  • Evaluation of Temperature Prediction Methods for Mass Concrete Members
    Riding, Kyle A.; Poole, Jonathan L.; Schindler, Anton K.; Juenger, Maria C. G.; Folliard, Kevin J. (2006)
    Over the years, many different simplified prediction methods have been developed to predict the temperature development within mass concrete members. This paper compares calculated temperature values from three commonly-used ...
  • Experimental Verification of Strut-and-Tie Model Design Method
    Ley, M. Tyler; Riding, Kyle A.; Widianto; Bae, Sungjin; Breen, John E. (2007)
    Strut-and-tie models (STM) are a valuable tool for the design of irregular concrete members. This paper presents the experimental results of tests conducted on small-scale, simply supported dapped beams with openings ...
  • Methods for Calculating Activation Energy for Portland Cement
    Poole, Jonathan L.; Riding, Kyle A.; Folliard, Kevin J.; Juenger, Maria C. G.; Schindler, Anton K. (2007)
    The accurate prediction of thermal gradients in concrete calls for models that characterize the temperature sensitivity of the hydration of cementitious materials. The most common method used for this purpose is the ...
  • Modeling hydration of cementitious systems
    Riding, Kyle A.; Poole, Jonathan L.; Folliard, Kevin J.; Juenger, Maria C. G.; Schindler, Anton K. (2012)
    Concrete performance, including strength, susceptibility to delayed ettringite formation, and residual stress development are dependent on early-age temperature development. Concrete temperature prediction during hydration ...
  • Performance-related specifications for PCC pavements in Kansas
    Gedafa, Daba S.; Hossain, Mustaque; Ingram, Lon S.; Kreider, Rick (2012)
    Statistical specifications for highway construction provide the means to measure the important quality control attributes and ensure their compliance. The pay adjustments in these specifications reflect the amount of pay ...
  • Quantification of Effects of Fly Ash Type on Concrete Early-Age Cracking
    Riding, Kyle A.; Poole, Jonathan L.; Schindler, Anton K.; Juenger, Maria C. G.; Folliard, Kevin J. (2008)
    The mechanisms that contribute to early-age cracking are complex. Determining the relative importance of each mechanism as well as the combined cracking potential for a given concrete material is essential for the ...
  • Signal pattern-recognition for damage diagnosis in structures
    Qiao, Long; Esmaeily, Asad; Melhem, Hani G. (2012)
    A signal-based pattern-recognition approach is used for structural damage diagnosis with a single or limited number of input/output signals. The approach is based on extraction of the features of the structural response ...
  • Simplified Concrete Resistivity and Rapid Chloride Permeability Test Method
    Riding, Kyle A.; Poole, Jonathan L.; Schindler, Anton K.; Juenger, Maria C. G.; Folliard, Kevin J. (2008)
    A simplified method of measuring concrete resistivity, as an index of permeability, has been developed that is similar to ASTM C1202 or the rapid chloride permeability test (RCPT). It is significantly faster and easier ...
  • Temperature Boundary Condition Models for Concrete Bridge Members
    Riding, Kyle A.; Poole, Jonathan L.; Schindler, Anton K.; Juenger, Maria C. G.; Folliard, Kevin J. (2007)
    The temperature development of mass concrete elements is strongly dependent on constituent materials and mixture proportions, as well as the formwork type, geometry, and environmental conditions. This paper presents a ...