ISSN: 2277-9655 [Gupta * et al., 7(2): February, 2018] Impact Factor: 5.164 IC™ Value: 3.00 CODEN: IJESS7 http: // www.ijesrt.com© International Journal of Engineering Sciences & Research Technology [441] IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY CEMENT STABILISED AND FIBER REINFORCED CLAY MIXED WITH RICE HUSK ASH Deepak Gupta* 1 , Harpinder Singh 2 & Sanjeev Kumar Sharma 3 *1 Former Research Scholar, Department of Civil Engineering, National Institute of Technology, Jalandhar, India, 2 Research Scholar, Department of Industrial and Production Engineering, National Institute of Technology, Jalandhar, India 3 Former Research Scholar, Department of Electronics and Communication Engineering, National Institute of Technology, Jalandhar, India DOI: 10.5281/zenodo.1173584 ABSTRACT A series of tests were conducted to study the combined effect of polypropylene fiber, cement and rice husk ash on kaolin clay. Cement and rice husk ash were added to clayey soil at ranges of 0–6% and 0–20%, respectively. Fiber content was varied as 0, 0.5, 1, 1.5, and 2%. To understand the impact of these additives on clay different tests like; compaction tests, unconfined compression tests (UCS), split tensile strength tests (STS) and California bearing ratio tests (CBR). In addition SEM (scanning electron microscopy), TEM (transmission electron microscopy) and XRD tests were carried out on certain samples in order to study the surface morphological characteristics, particle size and hydraulic compounds, which were formed. Specimens were cured for 7, 14, and 28 days after which they were tested for unconfined compression tests and split tensile tests and for CBR tests sample were soaked for 4 days. Based on optimum values obtained for cement and rice husk ash, tests were conducted on test specimens prepared from rice husk ash-clayey soil- cement-fiber mixture after 28 days of curing. Based on the favourable results obtained, it can be concluded that the expansive soil can be successfully stabilized by the combined action of fibers, cement, and rice husk ash. KEYWORDS: Rice Husk Ash; OMC; MDD; Cement; Stabilization. I. INTRODUCTION Weak or soft soils are undesirable in case of structure which transfer high load to the ground like multi-storey buildings, embankments with heavy traffic etc. These soils are susceptible to large settlements due to its poor shear strength and high compressibility. Different ground improvement techniques like densification techniques, reinforcement techniques and stabilization techniques are available options for improvement of the properties of weak soil. Among these technique addition of different materials like cement, fiber, and wastes like; fly ash, rice husk ash etc. is one of the popular technique among the engineers. Utilization of binder materials like cement and lime is very useful to improve the strength characteristics of soil. During shearing particles of soil moves relative to each other, this is the cause for the settlement and failure in the soil. Cement binds clay particle through its cementitious property. Many researchers have shown that performance of cement or lime increases in presence of pozzolanic materials like fly ash, pond ash etc (Beeghly 2003, Kumar and Deepak 2016). Use of fiber reinforcement is old techniques used from very long time. Mechanism of fiber reinforcement is similar to the plant root reinforcement. Different researchers have performed