Abstract: This paper presents a novel technology for detecting invisible damage inside concrete, which is based on reconstruction of dielectric profile (image) of the concrete illuminated with microwaves sent from and received by antenna arrays controlled by sophisticated software. The imaging system developed in this study consists of an 8×8 transmitting and an 8×8 receiving arrays, an innovat...

In recent years many research on composite beams with innovative shear transmission with composite dowels have been conducted and innovative composite constructions have been built. One of the common types of shear connection is the method of rolled girders encased in a concrete slab. The combination of such method and pcb (precast composite beam) technology is called pcb-W (precast composite b...

Using nano-technology materials in the asphalt pavement industry is new compared with Portland cement concrete. The main objective of this study is to investigate the effects of nano-silica modification on some properties of a penetration grade asphalt cement and a typical asphalt concrete. 60/70 penetration grade bitumen was modified with different percentages of nano-silica (i.e. 1, 3 and 5%,...

The strength and durability of concrete are the most essential parameters for determining structural performance of any concrete structure. Thus, there has been always a need to develop an appropriate test method to evaluate and identify concrete properties in various structural members. In recent years, several researchers have strived to exploit hyperspectral technology as a non destructive t...

Neural Networks technology provides several reliant analysis in many science and technology applications. In particular neural network is often applied to the development of statistical models for intrinsically non-linear systems, since neural networks behave better in complex conditions. In this research, applications of neural networks in determination of optimum bitumen content, Marshall Sta...

UNLABELLED The utility of micro-electro-mechanical sensors (MEMS) for application in air-coupled (contactless or noncontact) sensing to concrete nondestructive testing (NDT) is studied in this paper. The fundamental operation and characteristics of MEMS are first described. Then application of MEMS sensors toward established concrete test methods, including vibration resonance, impact-echo, ult...

Scaffolding is a widely used educational practice in which directed instruction gradually decreases as student competence increases—resulting in increased independent learning. This research introduces and evaluates an MR-based system for technology-mediated scaffolding in anesthesia education. Through merging real and virtual objects, the system addresses a vital problem in merging abstract an...

Penetration of chloride ions into concrete and diffusion of moisture in concrete are important factors responsible for the corrosion of steel in concrete. The two diffusion processes are coupled. This paper deals with the analysis and simulation of coupled chloride penetration and moisture diffusion in concrete. Of particular interest is the parallel programming in finite element method for sol...