Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Self Compacting Concrete

Behavior of Steel Fiber Reinforced Self Compacting Concrete Slabs under One-way Bending

Mohammed Hashim Mohammed

Engineering and Technology Journal, 2015, Volume 33, Issue A6, Pages 1341-1356
DOI: 10.30684/etj.33.6A.5

This paper presents an experimental investigation on the flexural behavior of reinforced concrete slabs under one way bending. Sixteen simply supported slabs of dimensions 1000mm×450mm×50 or 70mm were manufactured and tested. Twelve slabs were constructed using self compacting concrete (SCC) and four using conventional concrete (CC). Four variables were adopted to investigate slabs behavior: type of concrete (CC or SCC), longitudinal steel ratio (ρ), slab thickness (t) and steel fiber ratio (Vf). Test results showed that slab thickness (t) was the most effective factor in increasing ultimate load (Pu) of SCC slabs (up to 111%) as compared to the longitudinal steel ratio (ρ) and steel fiber ratio (Vf) with ΔPu up to 64% and 75%, respectively. Results also showed that using steel fiber in SCC up to 0.8% reduces its filling and passing abilities but it still satisfies the requirements of SCC specifications. In contrast, steel fiber increase compressive strength and modulus of rupture of SCC up to 10% and 60%, respectively.

Properties of High Performance Self Compacting Concrete Continuously Exposed in Oil Products

Shaker.A.Al-Mashhadany; Wasan Ismail Khalil; Ali Adel Ali

Engineering and Technology Journal, 2014, Volume 32, Issue 8, Pages 2030-2055
DOI: 10.30684/etj.32.8A12

Self compacted concrete (SCC) is a new generation of concrete. Its behavior after exposure to oil products is still unknown. This investigation includes producing SCC and investigate its properties after different exposure periods (28,60,90,120,150 and 180 days) to water or different oil products (crude oil, gas oil , motor oil and fuel oil ). The mechanical properties (compressive strength, splitting tensile strength, modulus of rupture and static modulus of elasticity) and dynamic properties (Ultrasonic pulse velocity and dynamic modulus of elasticity), length change, total absorption and density of SCC were studied. The results show that compressive strength, splitting tensile strength, modulus of rupture and static modulus of elasticity, ultrasonic pulse velocity, dynamic modulus of elasticity and density for SCC specimens continuously exposed to water are increase as the exposure period increased. Generally the results indicate a reduction in all these properties as the exposure period to oil products increased.

Experimental Study of Self Compacting Reinforced Concrete Deep Beams under Four Point Loads

Mohammed Mohammed Rasheed; Ilham Hatem Khudhair Alobaidi

Engineering and Technology Journal, 2012, Volume 30, Issue 13, Pages 2197-2208

The results of eight reinforced concrete deep beams tested under four point
loading condition are reported. The test beams were simply supported and were
made with self compacting concrete (SCC). The variables were; web reinforcement
and anchorage of tension reinforcement. The test beams were divided into four
groups according to the web reinforcement. Each group consists of two beams, one
with the anchorage of tension reinforcement and the other without. The nominal
cross section was 100 x 300mm and the clear span length was 1100mm.
Deflections of beams and cracking patterns were monitored during the tests at
different stages of the monotonic loading until failure. The results showed the
significance of the web reinforcement and anchorage of tension bars on the
strength and failure behavior of SCC deep beams. The ultimate strength of beam
without web reinforcement increased to 39% by adding anchorage to the
longitudinal tension reinforcement. While the ultimate strength of the beam
increased to 16% by adding anchorage to tension reinforcement for beams having
web reinforcement that consists of stirrups with horizontal reinforcement