Theses and Dissertations Collection

The first part of this study aims at developing hybrid fiber reinforced self-consolidating concrete (HFRSCC) made with a very high volume of supplementary cementitious materials (SCMs). Self-consolidating concrete (SCC) is a highly workable concrete that can easily flow through heavily reinforced concrete sections without the need for mechanical vibration. The percentages (by volume) of fibers considered were 0.1% and 0.2% hybrid combinations of nylon (PVA) and steel fibers, respectively. Cement was replaced by various percentages of SCMs by up to 70%. The mechanical properties (compressive strength, modulus of elasticity and tensile strength) and unrestrained drying shrinkage of the developed mixtures were evaluated and compared to the standard specifications.

The second part of this study aims at evaluating the mechanical properties (compressive strength, modulus of elasticity, tensile strength, and modulus of rupture), thermal properties and unrestrained drying shrinkage of the paving and structural concrete mixtures being used in the six districts of the State of Idaho. The focus of this evaluation was to develop a material database required for the implementation of the “AASHTOWare Pavement ME Design” (ME) Software which is used to design rigid Portland Cement Concrete (PCC) pavements. The data developed and examples of its implementation in the ME software were conducted, evaluated, and presented.