Review

A Review of Physical and Chemical Clayey.

Firoozi AA, Firoozi AA and Shojaei Baghini M.

J. Civil Eng. Urban., 6(4): 64-71, 2016; pii:S225204301600008-6

Abstract

Clays in general and expansive soils in particular have been a major concern to geotechnical engineers for many years. Moisture variations produce big volume changes in these types of soils. Several factors like amount and type of clay minerals, soil structure, dry density, confining pressure, moisture content and climate changes influence the amount of swell and shrinkage. These volume changes finally result in serious damage to the various structures including pavements. In addition, clayey soils are usually stiff when they are dry and give up their stiffness as they become saturated. Soft clays (i.e. illite/kaolinite/ montmorillonite) are associated with low compressive strength and excessive settlement. This reduction in strength due to moisture leads to severe damages to buildings and foundations.
Key words: Clay structure; Cation Exchange Capacity; Atterberg limits.

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Research Paper

Analysis of Urban Green Space Distribution; Case Study: Izeh City, Khuzestan Province, Iran.

Maleki S and Hatami D.

J. Civil Eng. Urban., 6(4): 72-77 2016; pii:S225204301600009-6

Abstract

Basically, the proper green space promotes to increase health, relaxation, high efficiency and high quality in life. It has been studied on region 1of Izeh city where there is unequal and improper distribution of green spaces in threefold region. According to population (65193) of Region 1 in 2009, per capita of green space is 15.70 m2 on the basis of our findings totally that it is very unequal and improper distribution than per capita of green space that is 12 m2 proposed by House and Urban Planning Ministry. As per capita of green space is ranged between 14.003 m2 in region 3 and 74% m2 in region 1. This research has been performed on the basis of descriptive and analyzed method by using various statistics and information and finally, a proper per capita of green space has been proposed for Izeh city by using a proper model. The need to review legislation to preserve land and planting trees with green space and interest they were one of the factors used by management for planning urban green space Izeh city is and the need for urban management in the form of a master plan with specified requirements and insufficient guarantees that the current problems encountered during the implementation to be worked out and support systems legislative, judicial and executive authority to apply for the preservation of green space in Izeh city.
Keywords: Application of Green Space, Green Space Per Capita, Standards, Spatial Distribution, Izeh City, Khuzestan province, Iran.

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