This paper presents the results of an experimental research on the workability and compressive strength of self-compacting concrete. The work focused on concrete mixes having water/binder ratios of 0.35 and 0.45, which contained constant total binder contents of 500 kg/m and 400 kg/m, respectively. The concrete mixes contained four different dosages of a superplasticizer based on carboxylic wit...

One of the most common formats for storing information is XML. It is used in many areas, with its spectrum expanding day by day. A big drawback of the XML format is that the documents can be quite large. This causes problems wherever size is an important issue, for example in embedded systems or whenever the document has to be transferred over a network. Another widely used format is XMI (XML M...

Treebanks, such as the Penn Treebank (PTB), offer a simple approach to obtaining a broad coverage grammar: one can simply read the grammar off the parse trees in the treebank. While such a grammar is easy to obtain, a square-root rate of growth of the rule set with corpus size suggests that the derived grammar is far from complete and that much more treebanked text would be required to obtain a...

In order to comply with current trends concerning sustainability, saving of primary materials and energy savings, this paper addresses Eco-concrete. The major focus thereby is on the increased efficiency of cement use. Applying a new mix design method for concrete, cement contents can be decreased and partially be substituted by other fine powders, preferentially by waste powders which have no ...

ABSTRACT Surface condition of powder details on the different stages of producing of joining elements is the important factor that influences on the choice of technological conditions of operations and end-use properties and running ability of product. Generally, the roughness, porosity and microstructure determine the surface condition. The results of investigation of surfaces of iron-copper d...

In this study two series of self compacting concrete mixtures were prepared with 100% coarse recycled concrete aggregates and different percentages of 0%, 20%, 40%, 60%, 80% and 100% fine recycled concrete aggregates. In series I and II the water to binder ratios were 0.50 and 0.45, respectively. The cement content was kept 350 3 m kg for those mixtures that don't have any Nano-Silica. To impro...

This paper investigates the effect of phase offsets, due to inaccurate estimation of the desired user fading process, in the performance of minimum mean-squared error (MMSE) receiver-based direct-sequence (DS) codedivision multiple access (CDMA) systems in terms of bit error rate (BER). We compared the performance of QPSK and 16-QAM modulation formats with different system loads and phase offse...

Self compacting concrete (SCC) is an innovative development of conventional concrete, which requires high binder content to increase its segregation resistance. This paper presents a comparative study on the use of different materials as binder content in SCC and their effects on the workability and strength properties are checked. Different combinations of Fly ash, Metakaolin and Saw dust ash ...