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Laboratory study to improve the expansive soil by adding chemical Stabilizers

دراسة مخبرية لتحسين الترب الانتفاخية بإضافة المثبتات الكيميائية

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 Publication date 2015
and research's language is العربية
 Created by Shamra Editor




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The purpose of this research is to study the improvement of soil properties by the addition of lime in certain percentages. The soil used in this study was obtained from the Baseet region, which is located by the Syrian coast. We have studied the effect of lime on the consistency, the swell characteristics and the shear strength of soil. The results of this study have shown a remarkable reduction of both liquid and shrinkage limits, and the plasticity index with the increase of lime percentage. As for plasticity limit, it increases in the beginning then decreases slightly with the rising of lime percentage. For the volumetric variation, the susceptibility of swelling and the shrinkage of improved soil with lime decrease, and the free swelling and the swelling pressure become almost negligible with 4% of lime. Based on the shear strength results, we can indicate a notable increase in the friction angle and cohesion of soil with increasing of lime percentage up to 8% of lime. After that, these two factors decrease.


Artificial intelligence review:
Research summary
تهدف هذه الدراسة إلى تحسين خصائص التربة الانتفاخية باستخدام مادة الكلس. تم اختيار تربة غضارية من منطقة البسيط على الساحل السوري لدراسة تأثير إضافة نسب مختلفة من الكلس على خصائص التربة. أظهرت النتائج انخفاضًا ملحوظًا في حد السيولة وحد الانكماش وقرينة اللدونة مع زيادة نسبة الكلس، بينما حد اللدونة زاد في البداية ثم انخفض بشكل طفيف. كما تبين أن قابلية التربة للانتفاخ والتقلص تقل بشكل كبير مع إضافة الكلس، حيث تصبح هذه القابلية شبه معدومة عند نسبة كلس 4%. بالنسبة لمقاومة القص، أظهرت النتائج زيادة ملحوظة في زاوية الاحتكاك الداخلي والتماسك مع زيادة نسبة الكلس حتى 8%، وبعدها تبدأ هذه القيم في الانخفاض. توصلت الدراسة إلى أن النسبة المثلى للكلس لتحسين التربة تعتمد على الهدف من التحسين، فإذا كان الهدف هو تقليل الانتفاخ فإن النسبة المثلى هي 4%، أما إذا كان الهدف هو زيادة مقاومة القص فإن النسبة المثلى هي 8%.
Critical review
دراسة نقدية: تعتبر هذه الدراسة خطوة هامة في مجال تحسين الترب الانتفاخية، ولكن هناك بعض النقاط التي يمكن مناقشتها. أولاً، الدراسة ركزت على نوع واحد من التربة من منطقة محددة، مما قد يحد من تعميم النتائج على أنواع أخرى من الترب. ثانياً، لم تتناول الدراسة تأثير العوامل البيئية المختلفة مثل التغيرات المناخية على فعالية الكلس في تحسين التربة. ثالثاً، يمكن أن تكون هناك حاجة لمزيد من التجارب الميدانية للتحقق من النتائج المخبرية وتطبيقها على نطاق أوسع. على الرغم من هذه النقاط، فإن الدراسة تقدم إسهاماً مهماً في تحسين الترب الانتفاخية باستخدام الكلس وتفتح المجال لمزيد من الأبحاث في هذا المجال.
Questions related to the research
  1. ما هي النسبة المثلى من الكلس لتقليل انتفاخ التربة؟

    النسبة المثلى من الكلس لتقليل انتفاخ التربة هي 4%.

  2. كيف تؤثر إضافة الكلس على حد السيولة وحد اللدونة للتربة؟

    إضافة الكلس تؤدي إلى انخفاض حد السيولة وحد اللدونة في البداية ثم تنخفض بشكل طفيف مع زيادة نسبة الكلس.

  3. ما هي التغيرات التي تحدث في مقاومة القص للتربة مع زيادة نسبة الكلس؟

    تزداد مقاومة القص بشكل ملحوظ مع زيادة نسبة الكلس حتى 8%، وبعدها تبدأ هذه القيم في الانخفاض.

  4. ما هي العوامل التي لم تتناولها الدراسة والتي يمكن أن تؤثر على فعالية الكلس في تحسين التربة؟

    الدراسة لم تتناول تأثير العوامل البيئية المختلفة مثل التغيرات المناخية على فعالية الكلس في تحسين التربة.


References used
ANKUR, M; RAJU, S: "Effect of lime and stone dust in the geotechnical properties of black cotton soil"". Int. J. of Geomate,2014, pp. 1033-1039
ABDI, M.R; WILD, S:"Sulphate expansive of lime-stabilize kaolinit ". University of Glamorgan, 1993, pp. 555-567
Bankole, G. M; Mtallib, M. O. A:"The Improvement of the Index Properties and Compaction Characteristics of Lime Stabilized ". EJGE,2011,pp.983-9964- JOEL, M; ISAAC, O: "Cement Stabilization of Igumale Shale Lime Admixture for Use as Flexible Pavement Construction Material ". EJGE,2014, pp. 1661-1673
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