Application of Self-Compacting Concrete (SCC) in the Execution of Reservoir of Water

2013 ◽  
Vol 756-759 ◽  
pp. 121-123
Author(s):  
Millena Bertolini Galzerano ◽  
Letícia Torres Bressan ◽  
Rosa Cristina Cecche Lintz ◽  
Lubienska Cristina Lucas Jaquiê Ribeiro ◽  
Marta Siviero Guilherme Pires ◽  
...  
Keyword(s):  
Water Treatment ◽  
Concrete Structures ◽  
Structural Elements ◽  
Self Compacting Concrete ◽  
Building Process ◽  
Water Treatment Station

Currently, the SCC is already used in several countries and is considered a breakthrough in the building process of concrete structures, as it increases productivity, reduces the demand for labor, work in time of concreting and improves the quality of the concrete and the environment work. Innumerous investigations on SCC [,[,[,[ have been developing in order to know their behavior, improve their properties and applicability in different structural elements. This paper presents the implementation of the SCC in the execution of the base of the waters reservoir, in water treatment station.

Microbiological quality of residues from drinking water preparation

1995 ◽  
Vol 31 (5-6) ◽  
pp. 75-79 ◽  
Author(s):  
M. Würzer ◽  
A. Wiedenmann ◽  
K. Botzenhart
Keyword(s):  
Waste Water ◽  
Escherichia Coli ◽  
Pseudomonas Aeruginosa ◽  
Drinking Water ◽  
Water Treatment ◽  
Pathogenic Bacteria ◽  
Waste Water Treatment ◽  
Microbiological Quality ◽  
Detection Limits

In Germany the application of procedures such as flocculation and filtration in the preparation of drinking water results in the annual production of an estimated 500,000 t of sediments and sludges. Some of these residues have a potential for being reused, for example in agriculture, forestry, brickworks or waste water treatment. To assess the microbiological quality of residues from waterworks methods for the detection of enterobacteria, Escherichia coli, Salmonella, Pseudomonas aeruginosa, Legionella, poliovirus, Ascaris suis eggs and Cryptosporidium have been evaluated regarding their detection limits and were applied to various residues from German waterworks. Results show that sediments and sludges may contain pathogenic bacteria, viruses and protista. When residues from waterworks are intended to be reused in agriculture or forestry the microbiological quality should therefore be considered.

About quality of dissertations, or this strange GOST

2021 ◽  
pp. 65-75
Author(s):  
Yu.V. Kazakov ◽  
Keyword(s):  
Graduate Students ◽  
System Approach ◽  
Scientific Methodology ◽  
Structural Elements ◽  
Academic Degree ◽  
Practical Guide ◽  
Classical Methodology ◽  
And Performance

Examined is relevance of a subject of work is caused by the continuing deterioration of dissertation works. Therefore, article purpose is to define the system reason of deterioration of training of the top skills by the analysis of contents and structure of theses. The main shortcomings of dissertations, and understanding of their structural elements by applicants of an academic degree by communication with them in the course of preparation and carrying out preliminary protection of these were analyzed. Results of the analysis were compared to requirements of classical methodology and to interpretation of these requirements in the methodical managements and in publications. The essential system reason of decline in quality of dissertation works is in their traditional unsystematic structure, whith investigation withdrawal from scientific methodology and particular leveling of motivation to the analysis of a condition of a question and the received results of researches and also to system approach to the thesis, need of strengthening of methodological training of graduate students according to the uniform nation-wide program providing system approach to the organization of researches for all scientific specialties, and processing’s of the “Thesis and Abstract of the Thesis” standard according to classical requirements of scientific methodology and the system approach to dissertation work Is shown. The system scheme of the thesis, which can make a manual basis is the practical guide to organization and performance of dissertation work for training of graduate students and applicants is offered.

A Study on the Optimization and Application of All Radial Truck Tire Building Process Technology

2009 ◽  
Vol 87-88 ◽  
pp. 244-249
Author(s):  
Zhi Hua Li ◽  
Shi Liang Yang ◽  
Peng Xia ◽  
Zhao Feng Li ◽  
Yan Qing Liu ◽  
...  
Keyword(s):  
Economic Benefit ◽  
Control Device ◽  
Process Technology ◽  
New Device ◽  
Truck Tire ◽  
Building Process ◽  
Technology Process ◽  
And Control

By analyzing the technology process of all steel radial truck tire building machine, the author finds that there is a big potential of improvement both in stitching effect and efficiency. A new kind of stitching and control device is designed to replace the original. The new device can realize the soft stitching of tire, which reduces redundant actions and thus optimizes the process and improves the stitching efficiency. It is found in tests that the optimized process reduces the blister defectives greatly. Both productivity and quality of tires are improved significantly. It shows a big economic benefit.

scholarly journals Early-Age Cracking in Concrete: Causes, Consequences, Remedial Measures, and Recommendations

2018 ◽  
Vol 8 (10) ◽  
pp. 1730 ◽  
Author(s):  
Md. Safiuddin ◽  
A. Kaish ◽  
Chin-Ong Woon ◽  
Sudharshan Raman
Keyword(s):  
Service Life ◽  
Concrete Structures ◽  
Real Life ◽  
Early Age ◽  
Structural Elements ◽  
Remedial Measures ◽  
Curing Conditions ◽  
Factors Affecting ◽  
Different Types ◽  
Service Conditions

Cracking is a common problem in concrete structures in real-life service conditions. In fact, crack-free concrete structures are very rare to find in real world. Concrete can undergo early-age cracking depending on the mix composition, exposure environment, hydration rate, and curing conditions. Understanding the causes and consequences of cracking thoroughly is essential for selecting proper measures to resolve the early-age cracking problem in concrete. This paper will help to identify the major causes and consequences of the early-age cracking in concrete. Also, this paper will be useful to adopt effective remedial measures for reducing or eliminating the early-age cracking problem in concrete. Different types of early-age crack, the factors affecting the initiation and growth of early-age cracks, the causes of early-age cracking, and the modeling of early-age cracking are discussed in this paper. A number of examples for various early-age cracking problems of concrete found in different structural elements are also shown. Above all, some recommendations are given for minimizing the early-age cracking in concrete. It is hoped that the information conveyed in this paper will be beneficial to improve the service life of concrete structures. Concrete researchers and practitioners may benefit from the contents of this paper.

Self Compacting Concrete Structures: A Techno-Economic Analysis

2017 ◽  
Vol 21 ◽  
pp. 624-631 ◽  
Author(s):  
Nicolae Cazacu ◽  
Aurelia Bradu ◽  
Nicolae Florea
Keyword(s):  
Mechanical Characteristics ◽  
Concrete Surface ◽  
Mix Design ◽  
Building Industry ◽  
Skilled Workers ◽  
Self Compacting Concrete ◽  
Construction Time ◽  
Placement Method ◽  
Global Cost

The concept of self-compacting concrete (SCC) was performed in late 1980 by Japanese researchers as a solution for the lack of skilled workers and decreasing quality in building industry. The high fluidity of SCC allows flowing under its own weight, filling completely the formwork without any vibration or material segregation, providing a higher quality of the concrete surface. Since its discovery, a large number of researcher studied its rheological properties, adjusted mix design methods and analysed mechanical characteristics. The placement method for conventionally concrete is no more valid for SCC, as mixture behaviour changed substantially. This aspect was less examined and the published material is inconsistent, even though it plays an essential role in the assessment of the global cost of a building. The aim of this study is to investigate materials cost, the labour requirements, formwork demands, methods of placement and construction time for building a structure using SCC and vibrated concrete and compare the results.

scholarly journals SWOT-F-ANALYSIS OF RESTAURANT BUSINESS IN KHARKIV

2020 ◽  
pp. 192-200
Author(s):  
Viktor Seliutin ◽  
Leonid Yatsun ◽  
Oleksandr Olshanskiy
Keyword(s):  
Swot Analysis ◽  
Fractal Theory ◽  
Restaurant Industry ◽  
Strategic Analysis ◽  
Economic Systems ◽  
Structural Elements ◽  
Fractal Structures ◽  
Development Scenarios ◽  
Fractal System

Introduction. The article deals with the evaluation of the Kharkiv restaurant industry as a fractal system by means of SWOT-f analysis. Modern ideas about socio-economic systems are based on a synergistic concept that is organically linked to fractal theory. By fractal structure, the restaurant industry is a seven-tier holarchical system that contains such determinants as the assortment and quality of the restaurant service, technology, management, marketing, changes, forms of clustering and competitiveness. The systematic nature of the restaurant industry implies a similar structure of external factors. One of the common methods of strategic evaluation is SWOT analysis. The proposed method of SWOT-f analysis is a modified tool for strategic analysis of sectoral and regional-sectoral systems, which are considered as fractal structures, which ensures the adequacy of their perception and accuracy of forecasting. Purpose of the article is to identify the main parameters of the modified SWOT-f-analysis as a strategic tool for evaluating the restaurant industry, assessing the strengths and weaknesses, as well as threats and opportunities for the development of the restaurant industry in Kharkiv as a fractal system in three scenarios: pessimistic, realistic and optimistic. Method. A modified SWOT-f analysis was used to evaluate the restaurant industry, which consists in structuring the factors of influence on the activity of the enterprise on fractal principles, and also assumes the application of three development scenarios: pessimistic, realistic and optimistic. Result. It is determined that SWOT-f-analysis is a more expedient tool of strategic analysis, since it contains all elements of classical SWOT-analysis; structured as a holarchical system, which gives it greater logic; built on evolutionary principles; has a more reasonable connection between internal structural elements and environmental factors; and also allows to define the limits of setting the goals of the enterprise development in pessimistic, realistic and optimistic scenarios. The assessment of the strengths and weaknesses, as well as the threats and opportunities for the development of the restaurant industry allowed to identify a more logical and structured profile for each scenario.

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