• Sabahat yahya
• Saurabh bali

Clayey soils and their related abnormal behaviour such as excessive shrinkage, swelling, consolidation, settlement and cracking on drying has been the subject of many investigations. In recent years, an increasing need is being felt for various types of constructions in marginal, lower reclaimed lands and coastal areas which are not suitable normally for construction purposes. Clays, well known for its high compressibility and poor shear strength, pose numerous problems to builders. However, reportedly in many cases, these additives resulted in a decrease in plasticity and increase in hydraulic conductivity. As a result, there has been a growing interest in soil/fibre reinforcement. The paper presents the effect of Pine needles stabilization on strength behaviour of clayey soil. Pine needles were collected from locally available forest ( Rajouri, J&K, India) and were chopped into 10 to 15mm lengths and left for sun drying till they turn yellowish brown in colour. Pine needles were then added randomly in clayey soil at different percentages (i.e. 0.5%, 1% 1.5%, 2%, 2.5%) by dry weight of soil. Soil samples randomly mixed with Pine needles were prepared at different water contents to determine the maximum dry density (MDD) and optimum moisture contents (OMC) of various samples .The soil samples were then subjected to (California bearing ratio) CBR and Shear Strength tests. The test results shows that the inclusion of Pine needles as reinforcement leads to increase in OMC and decrease in MDD. The CBR test results shows that there is significant increase in CBR value and shear strength of soil reinforced with Pine needles.

Clayey Soils, Pine needles, CBR, Shear strength

"INFLUENCE OF PINE NEEDLES ON SHEAR STRENGTH AND CALIFORNIA BEARING RATIO OF CLAYEY SOIL-AN EXPERIMENTAL INVESTIGATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.603-607, June 2019, Available :http://www.jetir.org/papers/JETIR1907V92.pdf

"INFLUENCE OF PINE NEEDLES ON SHEAR STRENGTH AND CALIFORNIA BEARING RATIO OF CLAYEY SOIL-AN EXPERIMENTAL INVESTIGATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp603-607, June 2019, Available at : http://www.jetir.org/papers/JETIR1907V92.pdf