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Volume 9 (5); 25 September, 2019


Components_of_Straw_Filler_Concrete_using_Orthogonal_ExperimentResearch Paper

Study on Components of Straw Filler Concrete using Orthogonal Experiment.

Thanh DV and Tinh PV.

J. Civil Eng. Urban., 9(5): 43-47, 2019; pii:S225204301900006-9

DOI: https://dx.doi.org/10.29252/scil.2019.jceu6

Abstract
Study on the use of agricultural residues in the production of construction materials is important in reducing construction costs, while minimizing environmental impacts. By using the orthogonal experimental design method and the experimental method in laboratory for determining slump of the concrete mix, compressive strength and volumetric mass of concrete, this paper shows the designing method of concrete component using straw fillers (straw filler concrete - straw concrete). Also, this study analyzes and assesses the influence of three factors: cement content, water content and straw content on basic features of designed concrete such as slump, volume and compressive strength, thereby determines the reasonable content of the components. Experimental results showed that, straw padded concrete meets the basic performance criteria for lightweight concrete when designed with reasonable components and the effect of these three factors on the basic features of straw concrete is very pronounced. Reasonable values of cement content, water content and straw content used to produce straw concrete mixture are: 14.6%; 10% and 2.04% respectively.
Keywords: Light weight concrete; Straw filler concrete; Agricultural by-product; Orthogonal Experiments.

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kzlar-manastr-trabzon-1-Roleve_and_Historical_BuildingShort Communication

Roleve and Historical Building Measurement Studies.

Nasrollahi N, Najafi N, Razzaghi F, Kazemi Z.

J. Civil Eng. Urban., 9(5): 48-50, 2019; pii:S225204301900007-9

DOI: https://dx.doi.org/10.29252/scil.2019.jceu7

Abstract
The mistake many officials make is to think that they know what a city is, but the ways in which they offer problems are not the result of a deep understanding, and that leads to more problems. First we should consider the term “city” and its relationship with our lifestyle. A city is a relatively large and permanent settlement. Although there is no agreement on how a city is distinguished from a town within general English language meanings, many cities have a particular administrative, legal, or historical status based on local law. For example, in the American state of Massachusetts an article of incorporation approved by the local state legislature distinguishes a city government from a town. A historical look at the cities may lead us to the conclusion that we do not know the city and to understand it we may have to increase our studies in this field. I hope this article helps us learn more about how cities came into being
Keywords: Roleve, City, Civilization, Settlement, Urbanization

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