this study evaluates two different types of techniques for concrete hollow-block sections reinforced with traditional steel rebars and wire meshes, and compares their structural behaviour to that of an ordinary reinforced concrete beam section. the comparisons are based on the responses both before and after they were repaired with glass fibre reinforced polymers (gfrp). the specimens were subj...

The only way to test the ability of concrete plants to produce high quality concrete is to test their final products. Also, the process of testing and controlling concrete quality is time consuming and expensive. In this regard, having a quick, cheap and efficient way to predict the readiness of concrete plants to produce high quality concrete is very valuable. In this paper, a probabilistic mu...

lateral resistance of railway track is one of the most important parameters in lateral stability. this parameterdepends!on the conditions of different components of ballasted railway track (such as density of ballast layer,sleeper spacing, type of sleeper, etc.). from this perspective, type of sleeper has an important effect on lateralresistance. however in some conditions, in technical and eco...

In this paper, a new roofing system is introduced, which is constructued using the precast composite sandwich panels. This roofing sandwich panels system consists of three kinds of precast concrete sandwich panels including capital panels, beam or between columns panels, and slab or middle panels. The panels are composed of three layers; A high strength reinforced concrete top layer. A thick la...

Steel-concrete-steel (SCS) sandwich panels are composed of two steel plates with low thicknesses and high densities and strengths and one thick layer between both plates with low strength and density known as core that is composed of concrete. Cohesive material-epoxy resin or shear connectors are usually used to connect the plates to the concrete core. SCS sandwich composites are being develope...

Beside the regularly applied concepts (e.g. neuron, brain, sign, representation, code, sense, experience, perception, etc.) an additional collection of concepts (entities, interaction, border, inhomogeneity, dialectics, necessity and contingency, freedom, historicity, acquaintance and knowledge, culture.) is proposed for the better understanding mind and cognition. An anti-Parmenidian ontology ...

The purpose of this paper is to show that arguments for and against cloning fail to make their case because of one or both of the following reasons: 1) they take for granted customary beliefs and assumptions that are far from being unquestionable; 2) they tend to ignore the context in which human cloning is developed. I will analyze some of the assumptions underlying the main arguments that hav...