Journal of Engineering Geology
نشریه زمین شناسی مهندسی
Journal of Engineering Geology
Basic Sciences
http://jeg.khu.ac.ir
1
admin
2228-6837
2981-1600
10.22034
fa
jalali
1396
10
1
gregorian
2018
1
1
11
3
online
1
fulltext
en
تأثیر خاکستر پوسته برنج روی مقاومت فشاری محدود نشده و پتانسیل تورم خاکهای رسی تثبیت شده با آهک در مجاورت سولفات
The Effect of Rice Husk Ash on Mechanical Properties of Clayey Soils Stabilized with Lime in the Presence of Sulphate
ژئوتکنیک (مکانیک خاک و سنگ)
Geotecnic
<span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">مهندسان ژئوتکنیک در بسیاری از پروژهها با خاکهای رسی</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">دارای</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">مقاومت کم</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">و</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">یا تورم زیاد مواجه می­شوند.</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">تثبیت خاک یکی</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">از راههای</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">مقابله</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">با</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">مشکلات</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">این</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">نوع</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">خاکها</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">است.</span></span></span><span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;"> آهک و سیمان متداولترین مواد شیمیایی در تثبیت خاکها خصوصاً خاکهای رسی هستند.</span></span></span><span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;"> اگر</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">در</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">خاک</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">رس</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">تثبیت</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">شده</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">با</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">آهک،</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">سولفات</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">وجود</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">داشته</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">باشد</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">یا</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">خاک</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">در</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">معرض</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">سولفات</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">قرار</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">گیرد</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">مشکلاتی</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">از</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">جمله</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">کاهش</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">مقاومت</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">و</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">افزایش</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">تورم</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">خاک</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">رس</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">بوجود می­آید. </span></span></span><span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">علت این</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">پدیده،</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">واکنش</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">شیمیایی</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">بین</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">کانیهای</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">خاک</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">رس،</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">آهک</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">و</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">سولفات</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">است</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">که</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">باعث</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">بهوجود</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">آمدن کانی­های ایترینگایت و تاماسایت</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">در</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">خاک</span></span></span> <span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">می­شود.</span></span></span><span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;"> استفاده از پسماندهای صنعتی موجود در کشور همانند خاکستر پوستۀ برنج</span></span></span><a href="#_ftn1" name="_ftnref1" title=""><span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;"><span dir="LTR"><span style="font-family:times new roman,serif;"><span style="font-size:11.0pt;">[1]</span></span></span></span></span></span></a><span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;"> در عملیات تثبیت خاک میتواند توجیه قتصادی داشته باشد. </span></span></span><span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">خاکستر پوستۀ برنج شامل مقادیر زیادی سیلیکا با سطح ویژه بالاست که برای فعال­سازی واکنش بین آهک و خاک مناسب است. در این تحقیق از آهک و خاکستر پوسته برنج برای تثبیت خاک رس گچ</span></span></span><span style="font-family:times new roman,serif;"><span style="font-size:11.0pt;">‎</span></span><span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">دار استفاده می</span></span></span><span style="font-family:times new roman,serif;"><span style="font-size:11.0pt;">‎</span></span><span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">شود و مقاومت فشاری محدود نشده و پتانسیل تورم خاک رس تثبیت شده ارزیابی میشود. </span></span></span><span dir="RTL"><span style="font-family:b lotus;"><span style="font-size:11.0pt;">سولفات در ساحتار نمونۀ خاک موجود </span></span></span><span style="font-family:b lotus;"><span style="font-size:11.0pt;">است. نتایج بهدست آمده از این تحقیق نشاندهندۀ تأثیر مثبت خاکستر پوستۀ برنج بر </span></span><span style="font-family:b lotus;"><span style="font-size:11.0pt;">افزایش مقاومت و کاهش تورم خاک رس گچ دار تثبیت شده با آهک است. از نقطه نظر تأمین مقاومت، مشخصات تورمی و اقتصاد طرح، اضافه کردن حدود 6-8% آهک و 8-10% </span></span><span style="font-family:b lotus;"><span style="font-size:11.0pt;">خاکستر پوستۀ برنج برای تثبیت خاک رس پیشنهاد میشود. </span></span>
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<div id="ftn1"><strong><sup><span style="font-family:b lotus;">* </span></sup></strong><strong><span style="font-family:b lotus;">نویسنده مسئول </span></strong> <a href="mailto:mhbazyar@mail.yu.ac.ir"><span dir="LTR">mhbazyar@mail.yu.ac.ir</span></a><br>
<span style="font-family:times new roman,serif;"><span style="font-size:8.0pt;"><span style="font-family:times new roman,serif;"><span style="font-size:8.0pt;">[1]</span></span></span></span><span dir="RTL"><span style="font-family:times new roman,serif;"><span style="font-size:8.0pt;">.</span></span></span><span style="font-family:times new roman,serif;"><span style="font-size:8.0pt;"> Rice Husk Ash</span></span></div>
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Geotechnical engineers, in many cases face with low strength or high swelling potential of clayey soils. Stabilization methods are used to improve the mechanical properties of this type of soils. Lime and cement are the most popular materials used in chemical stabilization of clayey soils. If sulphate exists in the stabilized clayey soil with lime, or if soil is exposed to sulphates, problems such as strength reduction and swelling <s>increase</s> will occur. Reuse of industrial residual such as Rice Husk Ash (RHA) can be beneficial from the economy point of view. RHA includes a proper amount of silica with high specific surface area which is very suitable for activating the reaction between the soil and lime. In this paper, chemical stabilization of gypsum clays using lime and RHA is addressed Sulphates exist in the constitution of the soil. Unconfined compression strength and swelling potentials of the stabilized soil are evaluated. The results of this study indicate that RHA has positive impacts on improving mechanical properties of the gypsum clays stabilized with lime. From the view point of strength and swelling characteristics, and economy, addition of 6–8% lime and 8-10% RHA as an optimum amount is recommended.
خاک رس گچدار, مقاومت فشاری محدود نشده, پتانسیل تورم, تثبیت خاک, خاکستر پوستۀ برنج
Gypsum clay, Unconfined Strength, Swelling potential, Stabilization, Rice Husk Ash.
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http://jeg.khu.ac.ir/browse.php?a_code=A-10-1107-1&slc_lang=en&sid=1
Mohammad Hossin
Bazyar
محمدحسین
بازیار
10031947532846001756
10031947532846001756
Yes
Mostafa
Ebrahimi
مصطفی
ابراهیمی
10031947532846001757
10031947532846001757
No
Mehdi
Zamani Lenjani
مهدی
زمانی لنجانی
10031947532846001758
10031947532846001758
No
Masood
Makarchian
مسعود
مکارچیان
10031947532846001759
10031947532846001759
No