Effects of fly-ash and polypropylen fibers on the properties of roller compacted concrete
In this thesis, effects of fly-ash and polypropylene fibers on the properties of roller compacted concrete (RCC) designed for highway pavement application were investigated.
In the first part of the study; water contents of 16 different RCC mixtures, containing 0, 20, 40 and 60% fly-ash by mass of binder material and 0, 0.25, 0.50 and 0.75% the polypropylene fibers by volume of concrete, were obtained by geotechnical method. In the second part of the study; 150/300 mm cylindirical specimens and 100/100/600 mm prismatic specimens were prepared. Specimens were cured at 20 ºC in water for 7, 28 and 90 days. Uniaxial compression, splitting tensile strength, flexural strength, pulse velocity and impact tests were performed on the cured specimens and related properties were determined. Besides, stress-strain behaviour of the tested specimens were investigated to determine the modulus of elasticity of RCC mixtures.
It was observed that RCC specimens were compacted successfully, water contents of the specimens were increased and unit weight values were decreased with the addition of fly ash and polypropylene fibre. The use of 40% and 60% fly-ash for RCC mixtures influenced some of the mechanical properties adversely. However, polypropylene fibre has no significant effect on the mechanical and impact properties of RCC mixtures. Fibres only influenced fractural mechanism positively.
Üte
Uçucu kül ve polipropilen lif kullanımının silindirle sıkıştırılmış beton özelliklerine etkisi · 2008 · 193 sayfa.
Danışman: Yrd. Doç. Dr. Şemsi Yazıcı
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