An investigation into the mixed mode fracture of steel fiber reinforced concrete (SFRC)beams with one percent volume fraction of steel fiber is presented. A series of notched beams withdifferent notch depths and locations are tested under three-point bending. The test results for apparentfracture toughness, crack trajectories, and fracture energy are presented. The crack paths for SFRCand plain...

The effect of zinc phosphate (ZP) and zinc calcium phosphate (ZCP) coatings on the reinforcing mechanisms of smooth steel fiber in cementitious matrix have been studied. The results of pull out tests illustrated that by coating smooth steel fiber the pull-out load may be increased up to 100%. The effect of zinc phosphate coating on interface bonding was more than zinc-calcium phosphate coating....

This paper describes a review of the potential use of High Strength Incorporating Ground Granulated Blast Furnace Slag and Steel Fiber Reinforced Concrete used in construction industry to improve the structural strength and reduce steel reinforcements requirements. Blast furnace slag (GGBS) has been used as a supplementary material along with the cement. It helps in increasing the durability an...

Immersion-type AE sensor is needed for corrosion monitoring of underground gasoline tanks. We are developing a multi-directional optical fiber AE sensor to monitor the longitudinal AE signal through liquid (liquid-borne AE). The developed AE system is an optical-fiber-based Mach-Zender-type laser interferometer using a weak laser and is intrinsically safe. Multi-sensing function was facilitated...

Abstract—In this paper we make a temperature investigations in two type of superposed crimped connections using experimental determinations. All the samples use 8 copper wire 7.1 x 3 mm2 crimped by two methods: the first method uses one crimp indents and the second is a proposed method with two crimp indents. The ferrule is a parallel one. We study the influence of number and position of crimp ...

An appropriate point to start is a reminder that concrete is by far the most important, the most versatile, and the most widely used building material worldwide. It has achieved this predominance because of a number of decisive advantages. If properly designed, it has excellent mechanical properties and is so durable that it can basically last forever. It is moldable into any shape or form and ...

Abstract Enhancing the electrical outputs of energy harvesters is a great demand for researchers in recent years. In this work, effect plasticizer treatment (Tetrahydrofuran [THF]) on ? phase content (F[ ]) electrospun polyvinylidene fluoride (PVDF) fiber webs which are used as active layers to directly make piezoelectric nanogenerator (PENG) demonstrated. The results showed that during treatme...

This paper presents the results of an experimental study into the behavior of concrete-filled steel tube columns confined by fiber-reinforced polymer (FRP). Eleven columns were tested to investigate the effects of the FRP layer number, the thickness of the steel tube and concrete strength on their load capacity and axial deformation capacity. The experimental results indicated that the FRP wrap...