نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکترا ی سازه های آبی گروه علوم ومهندسی آب ،دانشگاه آزاد اسلامی واحذ علوم وتحقیقات تهران
2 عضو هیئت علمی موسسه تحقیقات فنی ومهندسی، سازمان تحقیقات، آموزش و ترویج کشاورزی کزج
3 عضو هیئت علمی گروه علوم ومهندسی آب دانشگاه آزاد اسلامی واحد علوم وتحقیقات تهران
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسنده [English]
Gypsum soil is one of the problematic soils because of considerable solubility for gypsum particles in contact
with water. In this research, the effects of three factors including; gypsum percent, hydraulic gradient, and soil
texture were studied on solubility of gypsum soils. To do this, samples of gypsum soils were provided artificially
by adding various rates of natural gypsum rock including 0, 5, 10, 20 and 30 percent by weight of 3 kinds of soil
textures including clay, silty clay and sand. Totally, 15 types of gypsum soils were prepared. Then each of
gypsum soils were leached under five hydraulic gradients levels 0.5, 1, 2, 5 and 10. The results of the test
indicated that the rate of gypsum in the soil has direct effect on the rate of soluble in a way that by increasing
percent of gypsum the rate of solubility was increased. in addition, by increasing hydraulic gradient, the speed of
water outcome and its amount from soil environment in a specified time was increased and also more rate of
gypsum was derived. The statistical results show the highest impact of gypsum percentage and lowest impact of
hydraulic gradient soil on solubility of particles in different types of soils and it has no significant effect on the
overall equation of the soil texture.
کلیدواژه‌ها [English]
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