Date of Graduation

12-2018

Document Type

Dissertation

Degree Name

Doctor of Philosophy in Engineering (PhD)

Degree Level

Graduate

Department

Civil Engineering

Advisor/Mentor

Hale, W. Micah

Committee Member

Prinz, Gary S.

Second Committee Member

Selvam, R. Panneer

Third Committee Member

Manasreh, Omar O.

Keywords

Compressive Stength; Elastic Modulus; Ultra-High Performance Concrete

Abstract

Ultra-High Performance Concrete (UHPC) can enhance the durability and resilience of concrete structures. The use of local materials is a fundamental step to save energy and reduce the cost of concrete. The main focus of this research was to develop a UHPC with compressive strength of 150 MPa using locally sources materials. In this study, the effect of fine materials, binder type and content, type of mixer, steel fibers and curing regimes on concrete’s compressive strength were investigated. The relationship between compressive strength and elastic modulus was also studied. This study synthesizes all relevant experimental data in the literature to propose a new equation for predicting the modulus of elasticity (MOE) at different ages. A number of UHPC mixtures were developed to verify the accuracy of the proposed equation. With an error of ±10%, the proposed equation provides a reasonable prediction for the UHPC mixtures containing local materials. The final part of the dissertation focuses on developing economical UHPC mixtures by reducing the amount of binder content by using of ash. Costs were compared with the UHPC mixtures that are available in the market, indicating $283/m3 compared to approximately $200/m3 with current products.

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