Concrete is globally used material. It is a site-made material unlike other materials of construction and as such can vary to a very great extent in its quality, properties and performance owing to the use of natural materials except cement and sand. The production of natural sand is diminishing and also their use has lead to severe environmental problems. Thus, there is a need to replace these materials by some cheap, environmental friendly by-products.. , The environmental and economic concern is the biggest challenge concrete industry is facing. In this paper, the issues of environmental and economic concern are addressed by the use of quarry dust as partial replacement of fine aggregates in concrete. Fine aggregates were replaced by quarry dust as 0%, 10%, 20%, 30% and 40% by weight for M-25 mix. The concrete specimens were tested for compressive strength, strength, durability (water absorption) and density at 28 days of age and the results obtained were compared with those of normal concrete. The results showed that by increasing the quarry dust content workability increases and compressive strength increased.
Keywords: Compressive strength, Durability, split tensile strength, Quarry Dust, Workability
In this paper, the purpose is to find a relatively good reservoir by classification, which can be explored and developed by some methods. According to the characteristics of Gaotaizi tight oil reservoir pore structure in Qijia area, comprehensively considerate the information of mercury data and testing data. On the basis of researching the pore structure characteristics, with the correlation analysis of pore structure parameters and physical parameters to determine the mercury index. According to the mercury index and porosity, reservoir classification methods and plates are established in research area, and formulated the tight reservoir classification standards by pore structure characteristics. At last, verifying the plate, the consistent rate is over 88 percent, indicating the plate has a good application effect in the region, which providing a feasible method for reservoir evaluation.
Keywords: - tight oil reservoirs reservoir classification mercury index conventional curve
The existing housing stock is, at the moment, one of the major elements responsible for the environmental degradation.Nowadays, due to the depletion of natural resources, the efficiency levels of housing buildings is unsustainable, so that the levels of environmental comfort can be considered as satisfactory.It thus becomes necessary to discover which exact problems the existing housing stocks have, so that one may be able to contribute to their resolution.Therefore, if one possesses the knowledge of the main issues regarding the housing buildings' energy efficiency and their origin, one may be able to adapt the traditional rehabilitation process to the concept of sustainable energy rehabilitation; consequently, it would be possible the existence of high-efficiency energy rehabilitated buildings, with a lower consumption of natural resources.
Keywords: energy-efficient rehabilitation; energy efficiency;controlled costs
Social network analysis is having a major impact on people life style changes in recent years.The social web has emerged concurrent with a decline in Arab community involvement and number of close acquaintances. The rise of Muslim religiousness and reform movements in and beyond Middle East country hasbeen the focus of much recent attention such as Egypt, Syria and Iraq etc., Social media has led to paradigm shifts in ways people work and do business, interact and socialize, changes in their life style, learn and obtain knowledge.Also, social media facilitates comparing ourselves with others, which may have constructiveor undesirablethings.Thus the socialmedia has established itself as an important spatial extension of nation's historicity and experiments. The aim of research study is to identify the negative factor which can affect Arab community progress and identifying the problems and challenges on the social network media. Also, we identify the environments of threatening which in recent years has been dominated increasingly by, arguably, social networks.This research trying to remove barriers between social media networks, Arab community and Government.
Keywords: - Social Networks, Social Media, E-gossip, WhatsApp, Arab Society, Saudi Arabia, Facebook, Twitter etc.,
Multi-objective non-linear programs occur in various field of engineering application. One of the
applications of such program is structural design problem. In this paper, we consider a generalized form of a
multi-objective structural design problem. Triangular norm based fuzzy programming technique is used to solve
these problem. The test problem includes a three-bar planar truss subjected to a single load condition. The model
is illustrated with numerical examples.
Keywords: - Structural design, Fuzzy sets, Pareto optimal solution model, Fuzzy optimization technique, Multiobjective
programming, t-norm.
A novel linking mechanism has been described previously [4] that can be used to autonomously link sources that provide related answers to queries executed over an information network. The test query platform has now been re-written resulting in essentially a new test platform using the same basic query mechanism, but with a slightly different algorithm. This paper describes recent test results on the same query test process that supports the original findings and also shows the effectiveness of the linking mechanism in a new set of test scenarios.
Keywords: - dynamic linking, query process, test results, distributed information system.
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