*Corresponding author: yaseruthm@yahoo.com 1 bismail@uthm.edu.my 2Kemas@uthm.edu.my 1 STABILIZATION OF SAND USING CEMENT GROUTING YASER MOHAMMED RAGEH GAMIL 1 , PROF DATO DR. HJ. ISMAIL BIN HJ BAKAR 2 ,PROF. MADYA DR KEMAS AHMAD ZAMHARI 3 1 Faculty of civil and environmental engineering/ University Tun Hussein Onn Malaysia/ Yaseruthm@yahoo.com 2 Faculty of civil and environmental engineering/ University Tun Hussein Onn Malaysia/ Bismail@uthm.edu.my 3 Faculty of civil and environmental engineering/ University Tun Hussein Onn Malaysia / kemas@uthm.edu.my 1. Introduction Grouting is a widely used method for strengthening and sealing rock, soil and concrete. The possibilities for sealing structures are of great importance from both an economic and environmental point of view. The cost of grouting has in certain projects been as high as the cost of blasting and excavating the tunnel. To improve the technique for grouting with cement-based material, it is necessary to examine the properties of the grout mixture used [2]. Cement grouting is the injection of specially formulated cement-based mixes into the ground to improve its strength or reduce permeability. Nicholson offers a wide range of placement techniques for new, remedial or redevelopment applications. Our cement grouting technologies are increasingly chosen for cost- effective, permanent solutions. Cement grouting is most commonly performed by drilling holes into the foundation to intercept open cracks, joints, fissures or cavities, then pumping under pressure balanced and stabilized grout mixes using a combination of cement, water, and additives. Work generally begins with a base mix and is modified during the grouting process with subsequent mixes in order to achieve closure by reducing permeability to a predetermined value [6]. Cement Grouting, the most common form of Permeation Grouting, is the injection under pressure of pumpable Portland cement based grout into a soil or rock formation to fill voids or fractures in the formation. For example, if a large concrete floor slab were tilting to one side, a grout pipe could be installed under the low side of the slab where the tilt was occurring. Grout could be injected under the slab that would act like a "hydraulic jack" that could then raise the slab back to its desired angle. 2. Objectives of the study The following objectives of this study are: 1. To form grouted sand samples. 2. To implement and study cement grouting technique for sand. This is mainly used for ground improvement. 3. To test the grouted samples to determine the development of unconfined compression strength in different curing time. 3. Significance Of The Study For this study there are several significances that would be obtained at the end of this study, firstly a grouting testing machine to form grouted samples is fabricated and can be used for further studies and researches in grouting study either for sand or other materials for the purpose of improving properties for the chosen study materials. This machine can form grouted samples with specified dimensions.in additions to that, this study mainly achieved and studied the sand stabilization by cement grouting. I believe these samples can be studied and be used as comparative study with other non-sandy soil. Abstract: This study mainly discussed the grouting technique and the formation of grouted sand samples which is used for further study and analysis. However, this study presented the results of experimental investigation carried out on grouting in order to study the behavior of sand after grouting. Shear strength of the soil before and after grouting was studied for different water cement ratios of grout mixes. It was found that the strength of sand increased after injecting the cement. This study also explains on the formation of grouted samples in order to form samples which are suitable for further testing. The effect of cement grouts on the shear strength and shear strength of sand were investigated. Grouting setup equipment was developed and simulated for the purpose of conducting grouting by injecting cement grout into sand samples and compressive strength test were also conducted on these grouted samples. This study also discussed the development of grouted sand strength with respect to the water cement ratio. The results of the various investigations conclusively proved that grouting can be used as an effective way to improve the strength characteristics significantly and can also contribute to the stabilization of sand. Keywords: cement grouting, permeation grouting, sand stabilization, water cement ratio.