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Publication Date

Spring 2013

Degree Type

Thesis - Campus Access Only

Degree Name

Master of Science (MS)

Department

Civil and Environmental Engineering

Advisor

Akthem Al-Manaseer

Keywords

Autogenous, Cement Paste, Concrete, Creep, Experimental study, Shrinkage

Subject Areas

Civil engineering

Abstract

The main types of volume change in concrete that affect the performance of structures by causing stresses, crack, and deflection are creep and shrinkage. In this study, a concrete creep test was conducted on different concrete mixes to investigate age of loading, compressive strength, and the long-term effect on creep of concrete. Five different code models, namely the ACI 209R-92, B3, CEB 90, CEB MC90-99, and GL2000, were utilized in this study. The study results showed that creep increased over time; however, the rate of increase diminished after 250 days. Furthermore, increasing age of loading and compressive strength lowered concrete creep. We also introduced a new device for measuring autogenous shrinkage of cement paste to investigate mixes with different water-to-cement ratios containing fly ash or silica fume. We concluded that as the water-to-cement ratio decreased, the autogenous shrinkage increased. Also adding fly ash and silica fume decreased autogenous shrinkage.

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