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    Wyświetlanie 1-3 z 3
    Tytuł:
    An Investigation on the Advantages and Disadvantages of Chromite and Styrofoam (EPS) Ceilings in Concrete Structures
    Autorzy:
    Khaledyan, Hooshmand
    Powiązania:
    https://bibliotekanauki.pl/articles/1179177.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Styrofoam
    block
    chromite
    composite
    disadvantages and advantages
    Opis:
    The present paper tends to investigate the merits and demerits of chromite and Styrofoam ceilings in concrete structures. Since in lots of buildings and structures chromite and Styrofoam used in ceilings, there are problems with their implementation cause a bunch of advantages and disadvantages. Generally, precast beams or in short joist with blocks including both chromite and concrete, if properly designed, calculate and implemented have less tremble than the in situ concrete ceilings and composite due to the thickness of the ceiling blocks. But this is a general issue and it varies in different circumstances and conditions. For example, the vibration of the composite ceilings will be much less in the cases of underpinning both of the primary and secondary beams during concreting. The tremble of ceilings with old style blocks I mean Concrete masonry unit (concrete zigzag slab) and Composite steel concrete precast beams is also less than others of this kind Because of the underpinning during execution Polymer Styrofoam is white in color, and moisture, heat and sound insulation which is produced in petrochemical plants. This material is available in very small volumetric volumes (1.04 to 1.09 g / cm3) in different gradation of tiny and big can be found in form of granules, sheets, and blocks of various sizes and thicknesses. Cutting it off with cutting machines or by hot wire is easy to do. In this study, the chromite and Styrofoam ceilings are examined and their advantages and disadvantages of them in concrete structures are investigated.
    Źródło:
    World Scientific News; 2017, 83; 119-129
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Examining roads pavement management and flexibility of elasticity theory
    Autorzy:
    Khaledyan, Hooshmand
    Powiązania:
    https://bibliotekanauki.pl/articles/1191359.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Elasticity
    Pavement management
    Pavement network
    Roads
    Ways
    Opis:
    Roads are economic arteries of any country, without which there is no possibility of any social and economic activities. The more expansion and quality of roads networks increase, the more transportation of travellers through ground channels will be and as a result, far and near points will enjoy more facilities and in the end, the country will move towards development. Roads are comprised of various sections and are divided into various formats. However, the most definite and tangible section of any road is its pavement. Pavements are thought of national investment of any country where, annually a large part of construction budget coming from relevant organizations is spent on repair, maintenance, and perseverance of them. Securing sufficient budget for this issue is among subjects that have always obsessed the minds of high ranking officials. In the past, focus was always directed at preserving the pavements and pavement management was an unknown task. The determining factor in choosing the most appropriate way of repair and maintenance was the engineers' analysis and little attention was focused on life cycle incurred costs or prioritization based on the necessity at the network level. In modern economy, as with the life of pavements, there is a need for a systematic method for determining necessities with regards to repairing and marinating. Today, pavement networks need management and maintenance cannot suffice alone. Attempts have been made in this research to examine the asphalt pavement management as affected by vertical loading at the top of the paved surface under investigation where through the elasticity theory and simplifying theory by way of Burmister for layered model, the relevant mathematical theory was expanded and foundations of a computer program was accordingly formed. Progress recently made in the area of microcomputers and technology of pavement management have brought about the tools needed for managing the pavements economically, thereby creating a systematic and coherent pavement management system for choosing necessities related with delineation, maintenance, specification of priorities and optimal time for repair through creating pavement situation in the future.
    Źródło:
    World Scientific News; 2016, 34; 63-73
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Survey the effective factors on accidents decrement in the road of Hamadan – Sanandaj
    Autorzy:
    Hooshmand, Khaledyan
    Powiązania:
    https://bibliotekanauki.pl/articles/1114184.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Road
    accidents
    effective factors
    transportation
    vehicle
    Opis:
    In the current research, we surveyed the effective factors of accidents that had occurred on the road from Hamadan to Sanandaj. Road transportation is an inseparable part and the backbone of all transportation networks of most countries. Driving accidents are considered the major problem of road transportation and the increment process of accidents is so that it has reached crisis proportions. Basically, in road accidents, three factors are considered to be of importance: human activity, road and vehicle condition. The current research is a field study in the terms of data collection method and is considered to be Applied Research in the terms of purpose (or objective) and studied subject nature. The study population consists of suburban public transport fleet drivers working the Sanandaj - Hamadan road (26 persons). The tool was a questionnaire. In order to analyze the statistical data, the resulting information from the questionnaires were firstly extracted and then analysed by applying the Pearson correlation test. The results show that there is a clear relationship between the effective factors of accidents and road accidents.
    Źródło:
    World News of Natural Sciences; 2017, 11; 83-90
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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