Speech transmission over packet networks has to cope with packet delays and packet losses. When a packet loss occurs the missing information must be estimated. In this contribution we focus on restoring the spectral parameters of a speech coder. A novel approach to estimating missing Line Spectral Frequency (LSF) parameters using Gaussian Mixture Models (GMM) is proposed. We present the estimat...

The effects of silica fume and sodium silicate-based activators (SFA SSA, respectively) with different Ms (SiO2/Na2O) values on the setting behavior, rheological, mechanical, microstructural properties alkali-activated slag cement (AASC) were investigated. Setting time test results showed that AASCs activated by SFA prolonged significantly an increase value opposite to SSA activation case. From...

In order to investigate the influence of various parameters on compressive strength and fluidity reactive powder concrete (RPC) made from local materials, 22 groups RPC cubic specimens 3 prism were designed, main included water binder ratio, ratio silica fume cement, slag quartz sand volume fraction steel fiber, steam curing time. The stress-strain curves failure mode obtained by axial compress...

It is well known that the characteristics of concrete components greatly affect the durability of high strength/high performance (HS/HP) concrete against frost action. Undoubtedly, precise recognition of this relationship leads &#10to appropriate selection of the type and proportions of concrete components in any particular project. In the current study, the aim is to investigate the possibilit...

It is well known that the characteristics of concrete components greatly affect the durability of high strength/high performance (HS/HP) concrete against frost action. Undoubtedly, precise recognition of this relationship leads to appropriate selection of the type and proportions of concrete components in any particular project. In the current study, the aim is to investigate the possibility ...

A self-compacting concrete (SCC) is the one that can be placed in the form and can go through obstructions by its own weight and without the need of vibration. Since its first development in Japan in 1988, SCC has gained wider acceptance in Japan, Europe and USA due to its inherent distinct advantages. Although there are visible signs of its gradual acceptance in the North Africa through its li...

Self-Compacting Concrete Originally developed in Japan, SCC technology was made possible by the much earlier development of Superplasticisers for concrete. To compare the performance of SCC with Fly Ash 20%, Silica Fume 10%, Rice Husk Ash (5%, 10%, and 15%) as a partial replacement of cement, due to the high increase in construction which has brought a heavy demand for ingredients of concrete s...

Calcium carbide residue (CCR) is a waste by-product from acetylene gas production. The main component of CCR is Ca(OH)₂, which can react with siliceous materials through pozzolanic reactions, resulting in a product similar to those obtained from the cement hydration process. Thus, it is possible to use CCR as a substitute for Portland cement in concrete. In this research, we synthesized CCR and...

Abstract The effects of fly ash, Air Cooled Blast Furnace Slag (ACBFS), and silica fume on cement compressive strength are examined. concrete is studied by the addition air-cooled blast furnace slag fume. effect ACBFS, was investigated. content reduced 25%, 22.50%, 20%, 17.50%, respectively; ash used to replace 40%, 60% coarse aggregate; partially replaced 2.5%, 5%, 7.50% content. Contrarily, l...

Concrete is the most commonly used building material due to its high strength, moldability, weather-resistant, and fire resistance, among other benefits. In recent years, there has been a growth in usage of Micro Silica fume. Through Ore sand Bridge building, records show that was concrete. These fabrics are not only environmentally sustainable, but they also have technological advantages on bo...