EFFECT OF EXTRACTION WATER CONTENT ON IDENTIFICATION OF DISPERSIVE SOILS BASED ON SHERARD'S CHEMICAL CRITERION

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FARZANEH O.; REZVANI A.; BICHARANLOU R.

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Journal: Year:2002 | Volume:35 | Issue:4 (74) Page(s): 513-522

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Title

EFFECT OF EXTRACTION WATER CONTENT ON IDENTIFICATION OF DISPERSIVE SOILS BASED ON SHERARD'S CHEMICAL CRITERION

Author(s)

FARZANEH O. | REZVANI A. | BICHARANLOU R. | Issue Writer Certificate

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Abstract

Dispersive soils are clayey soils, which erode easily under concentrated seepage. Specific characteristic of these soils is existence of high an10untsof sodium ions in their pore water. Identification of dispersive soils is impossible through ordinary soil mechanics tests and for this purpose, conducting four specific tests namely Crumb, Double hydrometer, Pinl10le and Chemical tests is suggested by most of researchers and test codes. Sherard's chemical criterion is one of the commonly used criteria for identifying dispersive soils. For using this criterion, it is suggested by Sherard to extract pore water from the soil close to its liquid limit. However, through former studies on dispersive soils encountered in different regions if Iran, we found that in most cases, pore water extraction around liquid limit is not possible using ordinary S.M. laboratory equipment and requires special extraction device. In this study, a specific device was designed for pore water extraction in low moistures around liquid limit. Then, to determine. the effect of extraction moisture content on the evaluation of dispersive according to Sherard's chemical criteria, necessary identifying tests were conducted on eight soil samples, which were collected from different parts of Iran. The results of these tests showed that by variation of extraction water content, the amount of Sodium, Potassium, Calcium and Magnesium ions and also the ratio of sodium to the total dissolved salts may change notably. In other words, using Sherard's criterion disregard to his suggestion on extraction water content can lead to inaccurate or even incorrect results.

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APA: Copy

FARZANEH, O., REZVANI, A., & BICHARANLOU, R.. (2002). EFFECT OF EXTRACTION WATER CONTENT ON IDENTIFICATION OF DISPERSIVE SOILS BASED ON SHERARD'S CHEMICAL CRITERION. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), 35(4 (74)), 513-522. SID. https://sid.ir/paper/14240/en

Vancouver: Copy

FARZANEH O., REZVANI A., BICHARANLOU R.. EFFECT OF EXTRACTION WATER CONTENT ON IDENTIFICATION OF DISPERSIVE SOILS BASED ON SHERARD'S CHEMICAL CRITERION. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN)[Internet]. 2002;35(4 (74)):513-522. Available from: https://sid.ir/paper/14240/en

IEEE: Copy

O. FARZANEH, A. REZVANI, and R. BICHARANLOU, “EFFECT OF EXTRACTION WATER CONTENT ON IDENTIFICATION OF DISPERSIVE SOILS BASED ON SHERARD'S CHEMICAL CRITERION,” JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), vol. 35, no. 4 (74), pp. 513–522, 2002, [Online]. Available: https://sid.ir/paper/14240/en

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